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From ggreg...@apache.org
Subject [lang] Simplify, less clutter.
Date Sat, 16 Jan 2016 00:33:11 GMT
Repository: commons-lang
Updated Branches:
  refs/heads/master 7429e75b7 -> 18f5f54ca


Simplify, less clutter.

Project: http://git-wip-us.apache.org/repos/asf/commons-lang/repo
Commit: http://git-wip-us.apache.org/repos/asf/commons-lang/commit/18f5f54c
Tree: http://git-wip-us.apache.org/repos/asf/commons-lang/tree/18f5f54c
Diff: http://git-wip-us.apache.org/repos/asf/commons-lang/diff/18f5f54c

Branch: refs/heads/master
Commit: 18f5f54ca0e78df12586e0750e257058746a5a39
Parents: 7429e75
Author: ggregory <ggregory@apache.org>
Authored: Fri Jan 15 16:33:07 2016 -0800
Committer: ggregory <ggregory@apache.org>
Committed: Fri Jan 15 16:33:07 2016 -0800

----------------------------------------------------------------------
 .../org/apache/commons/lang3/BooleanUtils.java  | 2212 +++++++++---------
 1 file changed, 1104 insertions(+), 1108 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/commons-lang/blob/18f5f54c/src/main/java/org/apache/commons/lang3/BooleanUtils.java
----------------------------------------------------------------------
diff --git a/src/main/java/org/apache/commons/lang3/BooleanUtils.java b/src/main/java/org/apache/commons/lang3/BooleanUtils.java
index ba5dea0..5d49c2c 100644
--- a/src/main/java/org/apache/commons/lang3/BooleanUtils.java
+++ b/src/main/java/org/apache/commons/lang3/BooleanUtils.java
@@ -1,1108 +1,1104 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.commons.lang3;
-
-import org.apache.commons.lang3.math.NumberUtils;
-
-/**
- * <p>Operations on boolean primitives and Boolean objects.</p>
- *
- * <p>This class tries to handle {@code null} input gracefully.
- * An exception will not be thrown for a {@code null} input.
- * Each method documents its behaviour in more detail.</p>
- *
- * <p>#ThreadSafe#</p>
- * @since 2.0
- */
-public class BooleanUtils {
-
-    /**
-     * <p>{@code BooleanUtils} instances should NOT be constructed in standard programming.
-     * Instead, the class should be used as {@code BooleanUtils.negate(true);}.</p>
-     *
-     * <p>This constructor is public to permit tools that require a JavaBean instance
-     * to operate.</p>
-     */
-    public BooleanUtils() {
-      super();
-    }
-
-    // Boolean utilities
-    //--------------------------------------------------------------------------
-    /**
-     * <p>Negates the specified boolean.</p>
-     *
-     * <p>If {@code null} is passed in, {@code null} will be returned.</p>
-     *
-     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
-     *
-     * <pre>
-     *   BooleanUtils.negate(Boolean.TRUE)  = Boolean.FALSE;
-     *   BooleanUtils.negate(Boolean.FALSE) = Boolean.TRUE;
-     *   BooleanUtils.negate(null)          = null;
-     * </pre>
-     *
-     * @param bool  the Boolean to negate, may be null
-     * @return the negated Boolean, or {@code null} if {@code null} input
-     */
-    public static Boolean negate(final Boolean bool) {
-        if (bool == null) {
-            return null;
-        }
-        return bool.booleanValue() ? Boolean.FALSE : Boolean.TRUE;
-    }
-
-    // boolean Boolean methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Checks if a {@code Boolean} value is {@code true},
-     * handling {@code null} by returning {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.isTrue(Boolean.TRUE)  = true
-     *   BooleanUtils.isTrue(Boolean.FALSE) = false
-     *   BooleanUtils.isTrue(null)          = false
-     * </pre>
-     *
-     * @param bool  the boolean to check, null returns {@code false}
-     * @return {@code true} only if the input is non-null and true
-     * @since 2.1
-     */
-    public static boolean isTrue(final Boolean bool) {
-        return Boolean.TRUE.equals(bool);
-    }
-
-    /**
-     * <p>Checks if a {@code Boolean} value is <i>not</i> {@code true},
-     * handling {@code null} by returning {@code true}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.isNotTrue(Boolean.TRUE)  = false
-     *   BooleanUtils.isNotTrue(Boolean.FALSE) = true
-     *   BooleanUtils.isNotTrue(null)          = true
-     * </pre>
-     *
-     * @param bool  the boolean to check, null returns {@code true}
-     * @return {@code true} if the input is null or false
-     * @since 2.3
-     */
-    public static boolean isNotTrue(final Boolean bool) {
-        return !isTrue(bool);
-    }
-
-    /**
-     * <p>Checks if a {@code Boolean} value is {@code false},
-     * handling {@code null} by returning {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.isFalse(Boolean.TRUE)  = false
-     *   BooleanUtils.isFalse(Boolean.FALSE) = true
-     *   BooleanUtils.isFalse(null)          = false
-     * </pre>
-     *
-     * @param bool  the boolean to check, null returns {@code false}
-     * @return {@code true} only if the input is non-null and false
-     * @since 2.1
-     */
-    public static boolean isFalse(final Boolean bool) {
-        return Boolean.FALSE.equals(bool);
-    }
-
-    /**
-     * <p>Checks if a {@code Boolean} value is <i>not</i> {@code false},
-     * handling {@code null} by returning {@code true}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.isNotFalse(Boolean.TRUE)  = true
-     *   BooleanUtils.isNotFalse(Boolean.FALSE) = false
-     *   BooleanUtils.isNotFalse(null)          = true
-     * </pre>
-     *
-     * @param bool  the boolean to check, null returns {@code true}
-     * @return {@code true} if the input is null or true
-     * @since 2.3
-     */
-    public static boolean isNotFalse(final Boolean bool) {
-        return !isFalse(bool);
-    }
-
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts a Boolean to a boolean handling {@code null}
-     * by returning {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(Boolean.TRUE)  = true
-     *   BooleanUtils.toBoolean(Boolean.FALSE) = false
-     *   BooleanUtils.toBoolean(null)          = false
-     * </pre>
-     *
-     * @param bool  the boolean to convert
-     * @return {@code true} or {@code false}, {@code null} returns {@code false}
-     */
-    public static boolean toBoolean(final Boolean bool) {
-        return bool != null && bool.booleanValue();
-    }
-
-    /**
-     * <p>Converts a Boolean to a boolean handling {@code null}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBooleanDefaultIfNull(Boolean.TRUE, false) = true
-     *   BooleanUtils.toBooleanDefaultIfNull(Boolean.FALSE, true) = false
-     *   BooleanUtils.toBooleanDefaultIfNull(null, true)          = true
-     * </pre>
-     *
-     * @param bool  the boolean to convert
-     * @param valueIfNull  the boolean value to return if {@code null}
-     * @return {@code true} or {@code false}
-     */
-    public static boolean toBooleanDefaultIfNull(final Boolean bool, final boolean valueIfNull) {
-        if (bool == null) {
-            return valueIfNull;
-        }
-        return bool.booleanValue();
-    }
-
-    // Integer to Boolean methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts an int to a boolean using the convention that {@code zero}
-     * is {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(0) = false
-     *   BooleanUtils.toBoolean(1) = true
-     *   BooleanUtils.toBoolean(2) = true
-     * </pre>
-     *
-     * @param value  the int to convert
-     * @return {@code true} if non-zero, {@code false}
-     *  if zero
-     */
-    public static boolean toBoolean(final int value) {
-        return value != 0;
-    }
-
-    /**
-     * <p>Converts an int to a Boolean using the convention that {@code zero}
-     * is {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(0) = Boolean.FALSE
-     *   BooleanUtils.toBoolean(1) = Boolean.TRUE
-     *   BooleanUtils.toBoolean(2) = Boolean.TRUE
-     * </pre>
-     *
-     * @param value  the int to convert
-     * @return Boolean.TRUE if non-zero, Boolean.FALSE if zero,
-     *  {@code null} if {@code null}
-     */
-    public static Boolean toBooleanObject(final int value) {
-        return value == 0 ? Boolean.FALSE : Boolean.TRUE;
-    }
-
-    /**
-     * <p>Converts an Integer to a Boolean using the convention that {@code zero}
-     * is {@code false}.</p>
-     *
-     * <p>{@code null} will be converted to {@code null}.</p>
-     *
-     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(Integer.valueOf(0))    = Boolean.FALSE
-     *   BooleanUtils.toBoolean(Integer.valueOf(1))    = Boolean.TRUE
-     *   BooleanUtils.toBoolean(Integer.valueOf(null)) = null
-     * </pre>
-     *
-     * @param value  the Integer to convert
-     * @return Boolean.TRUE if non-zero, Boolean.FALSE if zero,
-     *  {@code null} if {@code null} input
-     */
-    public static Boolean toBooleanObject(final Integer value) {
-        if (value == null) {
-            return null;
-        }
-        return value.intValue() == 0 ? Boolean.FALSE : Boolean.TRUE;
-    }
-
-    /**
-     * <p>Converts an int to a boolean specifying the conversion values.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(0, 1, 0) = false
-     *   BooleanUtils.toBoolean(1, 1, 0) = true
-     *   BooleanUtils.toBoolean(2, 1, 2) = false
-     *   BooleanUtils.toBoolean(2, 2, 0) = true
-     * </pre>
-     *
-     * @param value  the Integer to convert
-     * @param trueValue  the value to match for {@code true}
-     * @param falseValue  the value to match for {@code false}
-     * @return {@code true} or {@code false}
-     * @throws IllegalArgumentException if no match
-     */
-    public static boolean toBoolean(final int value, final int trueValue, final int falseValue) {
-        if (value == trueValue) {
-            return true;
-        }
-        if (value == falseValue) {
-            return false;
-        }
-        // no match
-        throw new IllegalArgumentException("The Integer did not match either specified value");
-    }
-
-    /**
-     * <p>Converts an Integer to a boolean specifying the conversion values.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(Integer.valueOf(0), Integer.valueOf(1), Integer.valueOf(0)) = false
-     *   BooleanUtils.toBoolean(Integer.valueOf(1), Integer.valueOf(1), Integer.valueOf(0)) = true
-     *   BooleanUtils.toBoolean(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2)) = false
-     *   BooleanUtils.toBoolean(Integer.valueOf(2), Integer.valueOf(2), Integer.valueOf(0)) = true
-     *   BooleanUtils.toBoolean(null, null, Integer.valueOf(0))                     = true
-     * </pre>
-     *
-     * @param value  the Integer to convert
-     * @param trueValue  the value to match for {@code true}, may be {@code null}
-     * @param falseValue  the value to match for {@code false}, may be {@code null}
-     * @return {@code true} or {@code false}
-     * @throws IllegalArgumentException if no match
-     */
-    public static boolean toBoolean(final Integer value, final Integer trueValue, final Integer falseValue) {
-        if (value == null) {
-            if (trueValue == null) {
-                return true;
-            }
-            if (falseValue == null) {
-                return false;
-            }
-        } else if (value.equals(trueValue)) {
-            return true;
-        } else if (value.equals(falseValue)) {
-            return false;
-        }
-        // no match
-        throw new IllegalArgumentException("The Integer did not match either specified value");
-    }
-
-    /**
-     * <p>Converts an int to a Boolean specifying the conversion values.</p>
-     *
-     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
-     *
-     * <pre>
-     *   BooleanUtils.toBooleanObject(0, 0, 2, 3) = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject(2, 1, 2, 3) = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject(3, 1, 2, 3) = null
-     * </pre>
-     *
-     * @param value  the Integer to convert
-     * @param trueValue  the value to match for {@code true}
-     * @param falseValue  the value to match for {@code false}
-     * @param nullValue  the value to to match for {@code null}
-     * @return Boolean.TRUE, Boolean.FALSE, or {@code null}
-     * @throws IllegalArgumentException if no match
-     */
-    public static Boolean toBooleanObject(final int value, final int trueValue, final int falseValue, final int nullValue) {
-        if (value == trueValue) {
-            return Boolean.TRUE;
-        }
-        if (value == falseValue) {
-            return Boolean.FALSE;
-        }
-        if (value == nullValue) {
-            return null;
-        }
-        // no match
-        throw new IllegalArgumentException("The Integer did not match any specified value");
-    }
-
-    /**
-     * <p>Converts an Integer to a Boolean specifying the conversion values.</p>
-     *
-     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
-     *
-     * <pre>
-     *   BooleanUtils.toBooleanObject(Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(2), Integer.valueOf(3)) = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3)) = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject(Integer.valueOf(3), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3)) = null
-     * </pre>
-     *
-     * @param value  the Integer to convert
-     * @param trueValue  the value to match for {@code true}, may be {@code null}
-     * @param falseValue  the value to match for {@code false}, may be {@code null}
-     * @param nullValue  the value to to match for {@code null}, may be {@code null}
-     * @return Boolean.TRUE, Boolean.FALSE, or {@code null}
-     * @throws IllegalArgumentException if no match
-     */
-    public static Boolean toBooleanObject(final Integer value, final Integer trueValue, final Integer falseValue, final Integer nullValue) {
-        if (value == null) {
-            if (trueValue == null) {
-                return Boolean.TRUE;
-            }
-            if (falseValue == null) {
-                return Boolean.FALSE;
-            }
-            if (nullValue == null) {
-                return null;
-            }
-        } else if (value.equals(trueValue)) {
-            return Boolean.TRUE;
-        } else if (value.equals(falseValue)) {
-            return Boolean.FALSE;
-        } else if (value.equals(nullValue)) {
-            return null;
-        }
-        // no match
-        throw new IllegalArgumentException("The Integer did not match any specified value");
-    }
-
-    // Boolean to Integer methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts a boolean to an int using the convention that
-     * {@code zero} is {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toInteger(true)  = 1
-     *   BooleanUtils.toInteger(false) = 0
-     * </pre>
-     *
-     * @param bool  the boolean to convert
-     * @return one if {@code true}, zero if {@code false}
-     */
-    public static int toInteger(final boolean bool) {
-        return bool ? 1 : 0;
-    }
-
-    /**
-     * <p>Converts a boolean to an Integer using the convention that
-     * {@code zero} is {@code false}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toIntegerObject(true)  = Integer.valueOf(1)
-     *   BooleanUtils.toIntegerObject(false) = Integer.valueOf(0)
-     * </pre>
-     *
-     * @param bool  the boolean to convert
-     * @return one if {@code true}, zero if {@code false}
-     */
-    public static Integer toIntegerObject(final boolean bool) {
-        return bool ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
-    }
-
-    /**
-     * <p>Converts a Boolean to a Integer using the convention that
-     * {@code zero} is {@code false}.</p>
-     *
-     * <p>{@code null} will be converted to {@code null}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toIntegerObject(Boolean.TRUE)  = Integer.valueOf(1)
-     *   BooleanUtils.toIntegerObject(Boolean.FALSE) = Integer.valueOf(0)
-     * </pre>
-     *
-     * @param bool  the Boolean to convert
-     * @return one if Boolean.TRUE, zero if Boolean.FALSE, {@code null} if {@code null}
-     */
-    public static Integer toIntegerObject(final Boolean bool) {
-        if (bool == null) {
-            return null;
-        }
-        return bool.booleanValue() ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
-    }
-
-    /**
-     * <p>Converts a boolean to an int specifying the conversion values.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toInteger(true, 1, 0)  = 1
-     *   BooleanUtils.toInteger(false, 1, 0) = 0
-     * </pre>
-     *
-     * @param bool  the to convert
-     * @param trueValue  the value to return if {@code true}
-     * @param falseValue  the value to return if {@code false}
-     * @return the appropriate value
-     */
-    public static int toInteger(final boolean bool, final int trueValue, final int falseValue) {
-        return bool ? trueValue : falseValue;
-    }
-
-    /**
-     * <p>Converts a Boolean to an int specifying the conversion values.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toInteger(Boolean.TRUE, 1, 0, 2)  = 1
-     *   BooleanUtils.toInteger(Boolean.FALSE, 1, 0, 2) = 0
-     *   BooleanUtils.toInteger(null, 1, 0, 2)          = 2
-     * </pre>
-     *
-     * @param bool  the Boolean to convert
-     * @param trueValue  the value to return if {@code true}
-     * @param falseValue  the value to return if {@code false}
-     * @param nullValue  the value to return if {@code null}
-     * @return the appropriate value
-     */
-    public static int toInteger(final Boolean bool, final int trueValue, final int falseValue, final int nullValue) {
-        if (bool == null) {
-            return nullValue;
-        }
-        return bool.booleanValue() ? trueValue : falseValue;
-    }
-
-    /**
-     * <p>Converts a boolean to an Integer specifying the conversion values.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toIntegerObject(true, Integer.valueOf(1), Integer.valueOf(0))  = Integer.valueOf(1)
-     *   BooleanUtils.toIntegerObject(false, Integer.valueOf(1), Integer.valueOf(0)) = Integer.valueOf(0)
-     * </pre>
-     *
-     * @param bool  the to convert
-     * @param trueValue  the value to return if {@code true}, may be {@code null}
-     * @param falseValue  the value to return if {@code false}, may be {@code null}
-     * @return the appropriate value
-     */
-    public static Integer toIntegerObject(final boolean bool, final Integer trueValue, final Integer falseValue) {
-        return bool ? trueValue : falseValue;
-    }
-
-    /**
-     * <p>Converts a Boolean to an Integer specifying the conversion values.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toIntegerObject(Boolean.TRUE, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2))  = Integer.valueOf(1)
-     *   BooleanUtils.toIntegerObject(Boolean.FALSE, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2)) = Integer.valueOf(0)
-     *   BooleanUtils.toIntegerObject(null, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2))          = Integer.valueOf(2)
-     * </pre>
-     *
-     * @param bool  the Boolean to convert
-     * @param trueValue  the value to return if {@code true}, may be {@code null}
-     * @param falseValue  the value to return if {@code false}, may be {@code null}
-     * @param nullValue  the value to return if {@code null}, may be {@code null}
-     * @return the appropriate value
-     */
-    public static Integer toIntegerObject(final Boolean bool, final Integer trueValue, final Integer falseValue, final Integer nullValue) {
-        if (bool == null) {
-            return nullValue;
-        }
-        return bool.booleanValue() ? trueValue : falseValue;
-    }
-
-    // String to Boolean methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts a String to a Boolean.</p>
-     *
-     * <p>{@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'} or {@code 'yes'}
-     * (case insensitive) will return {@code true}.
-     * {@code 'false'}, {@code 'off'}, {@code 'n'}, {@code 'f'} or {@code 'no'}
-     * (case insensitive) will return {@code false}.
-     * Otherwise, {@code null} is returned.</p>
-     *
-     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
-     *
-     * <pre>
-     *   // N.B. case is not significant
-     *   BooleanUtils.toBooleanObject(null)    = null
-     *   BooleanUtils.toBooleanObject("true")  = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject("T")     = Boolean.TRUE // i.e. T[RUE]
-     *   BooleanUtils.toBooleanObject("false") = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject("f")     = Boolean.FALSE // i.e. f[alse]
-     *   BooleanUtils.toBooleanObject("No")    = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject("n")     = Boolean.FALSE // i.e. n[o]
-     *   BooleanUtils.toBooleanObject("on")    = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject("ON")    = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject("off")   = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject("oFf")   = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject("yes")   = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject("Y")     = Boolean.TRUE // i.e. Y[ES]
-     *   BooleanUtils.toBooleanObject("blue")  = null
-     *   BooleanUtils.toBooleanObject("true ") = null // trailing space (too long)
-     *   BooleanUtils.toBooleanObject("ono")   = null // does not match on or no
-     * </pre>
-     *
-     * @param str  the String to check; upper and lower case are treated as the same
-     * @return the Boolean value of the string, {@code null} if no match or {@code null} input
-     */
-    public static Boolean toBooleanObject(final String str) {
-        // Previously used equalsIgnoreCase, which was fast for interned 'true'.
-        // Non interned 'true' matched 15 times slower.
-        //
-        // Optimisation provides same performance as before for interned 'true'.
-        // Similar performance for null, 'false', and other strings not length 2/3/4.
-        // 'true'/'TRUE' match 4 times slower, 'tRUE'/'True' 7 times slower.
-        if (str == "true") {
-            return Boolean.TRUE;
-        }
-        if (str == null) {
-            return null;
-        }
-        switch (str.length()) {
-            case 1: {
-                final char ch0 = str.charAt(0);
-                if (ch0 == 'y' || ch0 == 'Y' ||
-                    ch0 == 't' || ch0 == 'T') {
-                    return Boolean.TRUE;
-                }
-                if (ch0 == 'n' || ch0 == 'N' ||
-                    ch0 == 'f' || ch0 == 'F') {
-                    return Boolean.FALSE;
-                }
-                break;
-            }
-            case 2: {
-                final char ch0 = str.charAt(0);
-                final char ch1 = str.charAt(1);
-                if ((ch0 == 'o' || ch0 == 'O') &&
-                    (ch1 == 'n' || ch1 == 'N') ) {
-                    return Boolean.TRUE;
-                }
-                if ((ch0 == 'n' || ch0 == 'N') &&
-                    (ch1 == 'o' || ch1 == 'O') ) {
-                    return Boolean.FALSE;
-                }
-                break;
-            }
-            case 3: {
-                final char ch0 = str.charAt(0);
-                final char ch1 = str.charAt(1);
-                final char ch2 = str.charAt(2);
-                if ((ch0 == 'y' || ch0 == 'Y') &&
-                    (ch1 == 'e' || ch1 == 'E') &&
-                    (ch2 == 's' || ch2 == 'S') ) {
-                    return Boolean.TRUE;
-                }
-                if ((ch0 == 'o' || ch0 == 'O') &&
-                    (ch1 == 'f' || ch1 == 'F') &&
-                    (ch2 == 'f' || ch2 == 'F') ) {
-                    return Boolean.FALSE;
-                }
-                break;
-            }
-            case 4: {
-                final char ch0 = str.charAt(0);
-                final char ch1 = str.charAt(1);
-                final char ch2 = str.charAt(2);
-                final char ch3 = str.charAt(3);
-                if ((ch0 == 't' || ch0 == 'T') &&
-                    (ch1 == 'r' || ch1 == 'R') &&
-                    (ch2 == 'u' || ch2 == 'U') &&
-                    (ch3 == 'e' || ch3 == 'E') ) {
-                    return Boolean.TRUE;
-                }
-                break;
-            }
-            case 5: {
-                final char ch0 = str.charAt(0);
-                final char ch1 = str.charAt(1);
-                final char ch2 = str.charAt(2);
-                final char ch3 = str.charAt(3);
-                final char ch4 = str.charAt(4);
-                if ((ch0 == 'f' || ch0 == 'F') &&
-                    (ch1 == 'a' || ch1 == 'A') &&
-                    (ch2 == 'l' || ch2 == 'L') &&
-                    (ch3 == 's' || ch3 == 'S') &&
-                    (ch4 == 'e' || ch4 == 'E') ) {
-                    return Boolean.FALSE;
-                }
-                break;
-            }
-        default:
-            break;
-        }
-
-        return null;
-    }
-
-    /**
-     * <p>Converts a String to a Boolean throwing an exception if no match.</p>
-     *
-     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
-     *
-     * <pre>
-     *   BooleanUtils.toBooleanObject("true", "true", "false", "null")  = Boolean.TRUE
-     *   BooleanUtils.toBooleanObject("false", "true", "false", "null") = Boolean.FALSE
-     *   BooleanUtils.toBooleanObject("null", "true", "false", "null")  = null
-     * </pre>
-     *
-     * @param str  the String to check
-     * @param trueString  the String to match for {@code true} (case sensitive), may be {@code null}
-     * @param falseString  the String to match for {@code false} (case sensitive), may be {@code null}
-     * @param nullString  the String to match for {@code null} (case sensitive), may be {@code null}
-     * @return the Boolean value of the string, {@code null} if either the String matches {@code nullString}
-     *  or if {@code null} input and {@code nullString} is {@code null}
-     * @throws IllegalArgumentException if the String doesn't match
-     */
-    public static Boolean toBooleanObject(final String str, final String trueString, final String falseString, final String nullString) {
-        if (str == null) {
-            if (trueString == null) {
-                return Boolean.TRUE;
-            }
-            if (falseString == null) {
-                return Boolean.FALSE;
-            }
-            if (nullString == null) {
-                return null;
-            }
-        } else if (str.equals(trueString)) {
-            return Boolean.TRUE;
-        } else if (str.equals(falseString)) {
-            return Boolean.FALSE;
-        } else if (str.equals(nullString)) {
-            return null;
-        }
-        // no match
-        throw new IllegalArgumentException("The String did not match any specified value");
-    }
-
-    // String to boolean methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts a String to a boolean (optimised for performance).</p>
-     *
-     * <p>{@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'} or {@code 'yes'}
-     * (case insensitive) will return {@code true}. Otherwise,
-     * {@code false} is returned.</p>
-     *
-     * <p>This method performs 4 times faster (JDK1.4) than
-     * {@code Boolean.valueOf(String)}. However, this method accepts
-     * 'on' and 'yes', 't', 'y' as true values.
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean(null)    = false
-     *   BooleanUtils.toBoolean("true")  = true
-     *   BooleanUtils.toBoolean("TRUE")  = true
-     *   BooleanUtils.toBoolean("tRUe")  = true
-     *   BooleanUtils.toBoolean("on")    = true
-     *   BooleanUtils.toBoolean("yes")   = true
-     *   BooleanUtils.toBoolean("false") = false
-     *   BooleanUtils.toBoolean("x gti") = false
-     *   BooleanUtils.toBooleanObject("y") = true
-     *   BooleanUtils.toBooleanObject("n") = false
-     *   BooleanUtils.toBooleanObject("t") = true
-     *   BooleanUtils.toBooleanObject("f") = false 
-     * </pre>
-     *
-     * @param str  the String to check
-     * @return the boolean value of the string, {@code false} if no match or the String is null
-     */
-    public static boolean toBoolean(final String str) {
-        return toBooleanObject(str) == Boolean.TRUE;
-    }
-
-    /**
-     * <p>Converts a String to a Boolean throwing an exception if no match found.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toBoolean("true", "true", "false")  = true
-     *   BooleanUtils.toBoolean("false", "true", "false") = false
-     * </pre>
-     *
-     * @param str  the String to check
-     * @param trueString  the String to match for {@code true} (case sensitive), may be {@code null}
-     * @param falseString  the String to match for {@code false} (case sensitive), may be {@code null}
-     * @return the boolean value of the string
-     * @throws IllegalArgumentException if the String doesn't match
-     */
-    public static boolean toBoolean(final String str, final String trueString, final String falseString) {
-        if (str == trueString) {
-            return true;
-        } else if (str == falseString) {
-            return false;
-        } else if (str != null) {
-            if (str.equals(trueString)) {
-                return true;
-            } else if (str.equals(falseString)) {
-                return false;
-            }
-        }
-        // no match
-        throw new IllegalArgumentException("The String did not match either specified value");
-    }
-
-    // Boolean to String methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts a Boolean to a String returning {@code 'true'},
-     * {@code 'false'}, or {@code null}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toStringTrueFalse(Boolean.TRUE)  = "true"
-     *   BooleanUtils.toStringTrueFalse(Boolean.FALSE) = "false"
-     *   BooleanUtils.toStringTrueFalse(null)          = null;
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @return {@code 'true'}, {@code 'false'}, or {@code null}
-     */
-    public static String toStringTrueFalse(final Boolean bool) {
-        return toString(bool, "true", "false", null);
-    }
-
-    /**
-     * <p>Converts a Boolean to a String returning {@code 'on'},
-     * {@code 'off'}, or {@code null}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toStringOnOff(Boolean.TRUE)  = "on"
-     *   BooleanUtils.toStringOnOff(Boolean.FALSE) = "off"
-     *   BooleanUtils.toStringOnOff(null)          = null;
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @return {@code 'on'}, {@code 'off'}, or {@code null}
-     */
-    public static String toStringOnOff(final Boolean bool) {
-        return toString(bool, "on", "off", null);
-    }
-
-    /**
-     * <p>Converts a Boolean to a String returning {@code 'yes'},
-     * {@code 'no'}, or {@code null}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toStringYesNo(Boolean.TRUE)  = "yes"
-     *   BooleanUtils.toStringYesNo(Boolean.FALSE) = "no"
-     *   BooleanUtils.toStringYesNo(null)          = null;
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @return {@code 'yes'}, {@code 'no'}, or {@code null}
-     */
-    public static String toStringYesNo(final Boolean bool) {
-        return toString(bool, "yes", "no", null);
-    }
-
-    /**
-     * <p>Converts a Boolean to a String returning one of the input Strings.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toString(Boolean.TRUE, "true", "false", null)   = "true"
-     *   BooleanUtils.toString(Boolean.FALSE, "true", "false", null)  = "false"
-     *   BooleanUtils.toString(null, "true", "false", null)           = null;
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @param trueString  the String to return if {@code true}, may be {@code null}
-     * @param falseString  the String to return if {@code false}, may be {@code null}
-     * @param nullString  the String to return if {@code null}, may be {@code null}
-     * @return one of the three input Strings
-     */
-    public static String toString(final Boolean bool, final String trueString, final String falseString, final String nullString) {
-        if (bool == null) {
-            return nullString;
-        }
-        return bool.booleanValue() ? trueString : falseString;
-    }
-
-    // boolean to String methods
-    //-----------------------------------------------------------------------
-    /**
-     * <p>Converts a boolean to a String returning {@code 'true'}
-     * or {@code 'false'}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toStringTrueFalse(true)   = "true"
-     *   BooleanUtils.toStringTrueFalse(false)  = "false"
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @return {@code 'true'}, {@code 'false'}, or {@code null}
-     */
-    public static String toStringTrueFalse(final boolean bool) {
-        return toString(bool, "true", "false");
-    }
-
-    /**
-     * <p>Converts a boolean to a String returning {@code 'on'}
-     * or {@code 'off'}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toStringOnOff(true)   = "on"
-     *   BooleanUtils.toStringOnOff(false)  = "off"
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @return {@code 'on'}, {@code 'off'}, or {@code null}
-     */
-    public static String toStringOnOff(final boolean bool) {
-        return toString(bool, "on", "off");
-    }
-
-    /**
-     * <p>Converts a boolean to a String returning {@code 'yes'}
-     * or {@code 'no'}.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toStringYesNo(true)   = "yes"
-     *   BooleanUtils.toStringYesNo(false)  = "no"
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @return {@code 'yes'}, {@code 'no'}, or {@code null}
-     */
-    public static String toStringYesNo(final boolean bool) {
-        return toString(bool, "yes", "no");
-    }
-
-    /**
-     * <p>Converts a boolean to a String returning one of the input Strings.</p>
-     *
-     * <pre>
-     *   BooleanUtils.toString(true, "true", "false")   = "true"
-     *   BooleanUtils.toString(false, "true", "false")  = "false"
-     * </pre>
-     *
-     * @param bool  the Boolean to check
-     * @param trueString  the String to return if {@code true}, may be {@code null}
-     * @param falseString  the String to return if {@code false}, may be {@code null}
-     * @return one of the two input Strings
-     */
-    public static String toString(final boolean bool, final String trueString, final String falseString) {
-        return bool ? trueString : falseString;
-    }
-
-    // logical operations
-    // ----------------------------------------------------------------------
-    /**
-     * <p>Performs an and on a set of booleans.</p>
-     *
-     * <pre>
-     *   BooleanUtils.and(true, true)         = true
-     *   BooleanUtils.and(false, false)       = false
-     *   BooleanUtils.and(true, false)        = false
-     *   BooleanUtils.and(true, true, false)  = false
-     *   BooleanUtils.and(true, true, true)   = true
-     * </pre>
-     *
-     * @param array  an array of {@code boolean}s
-     * @return {@code true} if the and is successful.
-     * @throws IllegalArgumentException if {@code array} is {@code null}
-     * @throws IllegalArgumentException if {@code array} is empty.
-     * @since 3.0.1
-     */
-    public static boolean and(final boolean... array) {
-        // Validates input
-        if (array == null) {
-            throw new IllegalArgumentException("The Array must not be null");
-        }
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Array is empty");
-        }
-        for (final boolean element : array) {
-            if (!element) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    /**
-     * <p>Performs an and on an array of Booleans.</p>
-     *
-     * <pre>
-     *   BooleanUtils.and(Boolean.TRUE, Boolean.TRUE)                 = Boolean.TRUE
-     *   BooleanUtils.and(Boolean.FALSE, Boolean.FALSE)               = Boolean.FALSE
-     *   BooleanUtils.and(Boolean.TRUE, Boolean.FALSE)                = Boolean.FALSE
-     *   BooleanUtils.and(Boolean.TRUE, Boolean.TRUE, Boolean.TRUE)   = Boolean.TRUE
-     *   BooleanUtils.and(Boolean.FALSE, Boolean.FALSE, Boolean.TRUE) = Boolean.FALSE
-     *   BooleanUtils.and(Boolean.TRUE, Boolean.FALSE, Boolean.TRUE)  = Boolean.FALSE
-     * </pre>
-     *
-     * @param array  an array of {@code Boolean}s
-     * @return {@code true} if the and is successful.
-     * @throws IllegalArgumentException if {@code array} is {@code null}
-     * @throws IllegalArgumentException if {@code array} is empty.
-     * @throws IllegalArgumentException if {@code array} contains a {@code null}
-     * @since 3.0.1
-     */
-    public static Boolean and(final Boolean... array) {
-        if (array == null) {
-            throw new IllegalArgumentException("The Array must not be null");
-        }
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Array is empty");
-        }
-        try {
-            final boolean[] primitive = ArrayUtils.toPrimitive(array);
-            return and(primitive) ? Boolean.TRUE : Boolean.FALSE;
-        } catch (final NullPointerException ex) {
-            throw new IllegalArgumentException("The array must not contain any null elements");
-        }
-    }
-
-    /**
-     * <p>Performs an or on a set of booleans.</p>
-     *
-     * <pre>
-     *   BooleanUtils.or(true, true)          = true
-     *   BooleanUtils.or(false, false)        = false
-     *   BooleanUtils.or(true, false)         = true
-     *   BooleanUtils.or(true, true, false)   = true
-     *   BooleanUtils.or(true, true, true)    = true
-     *   BooleanUtils.or(false, false, false) = false
-     * </pre>
-     *
-     * @param array  an array of {@code boolean}s
-     * @return {@code true} if the or is successful.
-     * @throws IllegalArgumentException if {@code array} is {@code null}
-     * @throws IllegalArgumentException if {@code array} is empty.
-     * @since 3.0.1
-     */
-    public static boolean or(final boolean... array) {
-        // Validates input
-        if (array == null) {
-            throw new IllegalArgumentException("The Array must not be null");
-        }
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Array is empty");
-        }
-        for (final boolean element : array) {
-            if (element) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * <p>Performs an or on an array of Booleans.</p>
-     *
-     * <pre>
-     *   BooleanUtils.or(Boolean.TRUE, Boolean.TRUE)                  = Boolean.TRUE
-     *   BooleanUtils.or(Boolean.FALSE, Boolean.FALSE)                = Boolean.FALSE
-     *   BooleanUtils.or(Boolean.TRUE, Boolean.FALSE)                 = Boolean.TRUE
-     *   BooleanUtils.or(Boolean.TRUE, Boolean.TRUE, Boolean.TRUE)    = Boolean.TRUE
-     *   BooleanUtils.or(Boolean.FALSE, Boolean.FALSE, Boolean.TRUE)  = Boolean.TRUE
-     *   BooleanUtils.or(Boolean.TRUE, Boolean.FALSE, Boolean.TRUE)   = Boolean.TRUE
-     *   BooleanUtils.or(Boolean.FALSE, Boolean.FALSE, Boolean.FALSE) = Boolean.FALSE
-     * </pre>
-     *
-     * @param array  an array of {@code Boolean}s
-     * @return {@code true} if the or is successful.
-     * @throws IllegalArgumentException if {@code array} is {@code null}
-     * @throws IllegalArgumentException if {@code array} is empty.
-     * @throws IllegalArgumentException if {@code array} contains a {@code null}
-     * @since 3.0.1
-     */
-    public static Boolean or(final Boolean... array) {
-        if (array == null) {
-            throw new IllegalArgumentException("The Array must not be null");
-        }
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Array is empty");
-        }
-        try {
-            final boolean[] primitive = ArrayUtils.toPrimitive(array);
-            return or(primitive) ? Boolean.TRUE : Boolean.FALSE;
-        } catch (final NullPointerException ex) {
-            throw new IllegalArgumentException("The array must not contain any null elements");
-        }
-    }
-
-    /**
-     * <p>Performs an xor on a set of booleans.</p>
-     *
-     * <pre>
-     *   BooleanUtils.xor(true, true)   = false
-     *   BooleanUtils.xor(false, false) = false
-     *   BooleanUtils.xor(true, false)  = true
-     *   BooleanUtils.xor(true, true)   = false
-     *   BooleanUtils.xor(false, false) = false
-     *   BooleanUtils.xor(true, false)  = true
-     * </pre>
-     *
-     * @param array  an array of {@code boolean}s
-     * @return {@code true} if the xor is successful.
-     * @throws IllegalArgumentException if {@code array} is {@code null}
-     * @throws IllegalArgumentException if {@code array} is empty.
-     */
-    public static boolean xor(final boolean... array) {
-        // Validates input
-        if (array == null) {
-            throw new IllegalArgumentException("The Array must not be null");
-        }
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Array is empty");
-        }
-
-        // false if the neutral element of the xor operator
-        boolean result = false;
-        for (final boolean element : array) {
-            result ^= element;
-        }
-
-        return result;
-    }
-
-    /**
-     * <p>Performs an xor on an array of Booleans.</p>
-     *
-     * <pre>
-     *   BooleanUtils.xor(new Boolean[] { Boolean.TRUE, Boolean.TRUE })   = Boolean.FALSE
-     *   BooleanUtils.xor(new Boolean[] { Boolean.FALSE, Boolean.FALSE }) = Boolean.FALSE
-     *   BooleanUtils.xor(new Boolean[] { Boolean.TRUE, Boolean.FALSE })  = Boolean.TRUE
-     * </pre>
-     *
-     * @param array  an array of {@code Boolean}s
-     * @return {@code true} if the xor is successful.
-     * @throws IllegalArgumentException if {@code array} is {@code null}
-     * @throws IllegalArgumentException if {@code array} is empty.
-     * @throws IllegalArgumentException if {@code array} contains a {@code null}
-     */
-    public static Boolean xor(final Boolean... array) {
-        if (array == null) {
-            throw new IllegalArgumentException("The Array must not be null");
-        }
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Array is empty");
-        }
-        try {
-            final boolean[] primitive = ArrayUtils.toPrimitive(array);
-            return xor(primitive) ? Boolean.TRUE : Boolean.FALSE;
-        } catch (final NullPointerException ex) {
-            throw new IllegalArgumentException("The array must not contain any null elements");
-        }
-    }
-
-    /**
-     * <p>Compares two {@code boolean} values. This is the same functionality as provided in Java 7.</p>
-     *
-     * @param x the first {@code boolean} to compare
-     * @param y the second {@code boolean} to compare
-     * @return the value {@code 0} if {@code x == y};
-     *         a value less than {@code 0} if {@code !x && y}; and
-     *         a value greater than {@code 0} if {@code x && !y}
-     * @since 3.4
-     */
-    public static int compare(boolean x, boolean y) {
-        if (x == y) {
-            return 0;
-        }
-        if (x) {
-            return 1;
-        } else {
-            return -1;
-        }
-    }
-
-}
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3;
+
+import org.apache.commons.lang3.math.NumberUtils;
+
+/**
+ * <p>Operations on boolean primitives and Boolean objects.</p>
+ *
+ * <p>This class tries to handle {@code null} input gracefully.
+ * An exception will not be thrown for a {@code null} input.
+ * Each method documents its behaviour in more detail.</p>
+ *
+ * <p>#ThreadSafe#</p>
+ * @since 2.0
+ */
+public class BooleanUtils {
+
+    /**
+     * <p>{@code BooleanUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as {@code BooleanUtils.negate(true);}.</p>
+     *
+     * <p>This constructor is public to permit tools that require a JavaBean instance
+     * to operate.</p>
+     */
+    public BooleanUtils() {
+      super();
+    }
+
+    // Boolean utilities
+    //--------------------------------------------------------------------------
+    /**
+     * <p>Negates the specified boolean.</p>
+     *
+     * <p>If {@code null} is passed in, {@code null} will be returned.</p>
+     *
+     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
+     *
+     * <pre>
+     *   BooleanUtils.negate(Boolean.TRUE)  = Boolean.FALSE;
+     *   BooleanUtils.negate(Boolean.FALSE) = Boolean.TRUE;
+     *   BooleanUtils.negate(null)          = null;
+     * </pre>
+     *
+     * @param bool  the Boolean to negate, may be null
+     * @return the negated Boolean, or {@code null} if {@code null} input
+     */
+    public static Boolean negate(final Boolean bool) {
+        if (bool == null) {
+            return null;
+        }
+        return bool.booleanValue() ? Boolean.FALSE : Boolean.TRUE;
+    }
+
+    // boolean Boolean methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Checks if a {@code Boolean} value is {@code true},
+     * handling {@code null} by returning {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.isTrue(Boolean.TRUE)  = true
+     *   BooleanUtils.isTrue(Boolean.FALSE) = false
+     *   BooleanUtils.isTrue(null)          = false
+     * </pre>
+     *
+     * @param bool  the boolean to check, null returns {@code false}
+     * @return {@code true} only if the input is non-null and true
+     * @since 2.1
+     */
+    public static boolean isTrue(final Boolean bool) {
+        return Boolean.TRUE.equals(bool);
+    }
+
+    /**
+     * <p>Checks if a {@code Boolean} value is <i>not</i> {@code true},
+     * handling {@code null} by returning {@code true}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.isNotTrue(Boolean.TRUE)  = false
+     *   BooleanUtils.isNotTrue(Boolean.FALSE) = true
+     *   BooleanUtils.isNotTrue(null)          = true
+     * </pre>
+     *
+     * @param bool  the boolean to check, null returns {@code true}
+     * @return {@code true} if the input is null or false
+     * @since 2.3
+     */
+    public static boolean isNotTrue(final Boolean bool) {
+        return !isTrue(bool);
+    }
+
+    /**
+     * <p>Checks if a {@code Boolean} value is {@code false},
+     * handling {@code null} by returning {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.isFalse(Boolean.TRUE)  = false
+     *   BooleanUtils.isFalse(Boolean.FALSE) = true
+     *   BooleanUtils.isFalse(null)          = false
+     * </pre>
+     *
+     * @param bool  the boolean to check, null returns {@code false}
+     * @return {@code true} only if the input is non-null and false
+     * @since 2.1
+     */
+    public static boolean isFalse(final Boolean bool) {
+        return Boolean.FALSE.equals(bool);
+    }
+
+    /**
+     * <p>Checks if a {@code Boolean} value is <i>not</i> {@code false},
+     * handling {@code null} by returning {@code true}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.isNotFalse(Boolean.TRUE)  = true
+     *   BooleanUtils.isNotFalse(Boolean.FALSE) = false
+     *   BooleanUtils.isNotFalse(null)          = true
+     * </pre>
+     *
+     * @param bool  the boolean to check, null returns {@code true}
+     * @return {@code true} if the input is null or true
+     * @since 2.3
+     */
+    public static boolean isNotFalse(final Boolean bool) {
+        return !isFalse(bool);
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts a Boolean to a boolean handling {@code null}
+     * by returning {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(Boolean.TRUE)  = true
+     *   BooleanUtils.toBoolean(Boolean.FALSE) = false
+     *   BooleanUtils.toBoolean(null)          = false
+     * </pre>
+     *
+     * @param bool  the boolean to convert
+     * @return {@code true} or {@code false}, {@code null} returns {@code false}
+     */
+    public static boolean toBoolean(final Boolean bool) {
+        return bool != null && bool.booleanValue();
+    }
+
+    /**
+     * <p>Converts a Boolean to a boolean handling {@code null}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBooleanDefaultIfNull(Boolean.TRUE, false) = true
+     *   BooleanUtils.toBooleanDefaultIfNull(Boolean.FALSE, true) = false
+     *   BooleanUtils.toBooleanDefaultIfNull(null, true)          = true
+     * </pre>
+     *
+     * @param bool  the boolean to convert
+     * @param valueIfNull  the boolean value to return if {@code null}
+     * @return {@code true} or {@code false}
+     */
+    public static boolean toBooleanDefaultIfNull(final Boolean bool, final boolean valueIfNull) {
+        if (bool == null) {
+            return valueIfNull;
+        }
+        return bool.booleanValue();
+    }
+
+    // Integer to Boolean methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts an int to a boolean using the convention that {@code zero}
+     * is {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(0) = false
+     *   BooleanUtils.toBoolean(1) = true
+     *   BooleanUtils.toBoolean(2) = true
+     * </pre>
+     *
+     * @param value  the int to convert
+     * @return {@code true} if non-zero, {@code false}
+     *  if zero
+     */
+    public static boolean toBoolean(final int value) {
+        return value != 0;
+    }
+
+    /**
+     * <p>Converts an int to a Boolean using the convention that {@code zero}
+     * is {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(0) = Boolean.FALSE
+     *   BooleanUtils.toBoolean(1) = Boolean.TRUE
+     *   BooleanUtils.toBoolean(2) = Boolean.TRUE
+     * </pre>
+     *
+     * @param value  the int to convert
+     * @return Boolean.TRUE if non-zero, Boolean.FALSE if zero,
+     *  {@code null} if {@code null}
+     */
+    public static Boolean toBooleanObject(final int value) {
+        return value == 0 ? Boolean.FALSE : Boolean.TRUE;
+    }
+
+    /**
+     * <p>Converts an Integer to a Boolean using the convention that {@code zero}
+     * is {@code false}.</p>
+     *
+     * <p>{@code null} will be converted to {@code null}.</p>
+     *
+     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(Integer.valueOf(0))    = Boolean.FALSE
+     *   BooleanUtils.toBoolean(Integer.valueOf(1))    = Boolean.TRUE
+     *   BooleanUtils.toBoolean(Integer.valueOf(null)) = null
+     * </pre>
+     *
+     * @param value  the Integer to convert
+     * @return Boolean.TRUE if non-zero, Boolean.FALSE if zero,
+     *  {@code null} if {@code null} input
+     */
+    public static Boolean toBooleanObject(final Integer value) {
+        if (value == null) {
+            return null;
+        }
+        return value.intValue() == 0 ? Boolean.FALSE : Boolean.TRUE;
+    }
+
+    /**
+     * <p>Converts an int to a boolean specifying the conversion values.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(0, 1, 0) = false
+     *   BooleanUtils.toBoolean(1, 1, 0) = true
+     *   BooleanUtils.toBoolean(2, 1, 2) = false
+     *   BooleanUtils.toBoolean(2, 2, 0) = true
+     * </pre>
+     *
+     * @param value  the Integer to convert
+     * @param trueValue  the value to match for {@code true}
+     * @param falseValue  the value to match for {@code false}
+     * @return {@code true} or {@code false}
+     * @throws IllegalArgumentException if no match
+     */
+    public static boolean toBoolean(final int value, final int trueValue, final int falseValue) {
+        if (value == trueValue) {
+            return true;
+        }
+        if (value == falseValue) {
+            return false;
+        }
+        // no match
+        throw new IllegalArgumentException("The Integer did not match either specified value");
+    }
+
+    /**
+     * <p>Converts an Integer to a boolean specifying the conversion values.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(Integer.valueOf(0), Integer.valueOf(1), Integer.valueOf(0)) = false
+     *   BooleanUtils.toBoolean(Integer.valueOf(1), Integer.valueOf(1), Integer.valueOf(0)) = true
+     *   BooleanUtils.toBoolean(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2)) = false
+     *   BooleanUtils.toBoolean(Integer.valueOf(2), Integer.valueOf(2), Integer.valueOf(0)) = true
+     *   BooleanUtils.toBoolean(null, null, Integer.valueOf(0))                     = true
+     * </pre>
+     *
+     * @param value  the Integer to convert
+     * @param trueValue  the value to match for {@code true}, may be {@code null}
+     * @param falseValue  the value to match for {@code false}, may be {@code null}
+     * @return {@code true} or {@code false}
+     * @throws IllegalArgumentException if no match
+     */
+    public static boolean toBoolean(final Integer value, final Integer trueValue, final Integer falseValue) {
+        if (value == null) {
+            if (trueValue == null) {
+                return true;
+            }
+            if (falseValue == null) {
+                return false;
+            }
+        } else if (value.equals(trueValue)) {
+            return true;
+        } else if (value.equals(falseValue)) {
+            return false;
+        }
+        // no match
+        throw new IllegalArgumentException("The Integer did not match either specified value");
+    }
+
+    /**
+     * <p>Converts an int to a Boolean specifying the conversion values.</p>
+     *
+     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
+     *
+     * <pre>
+     *   BooleanUtils.toBooleanObject(0, 0, 2, 3) = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject(2, 1, 2, 3) = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject(3, 1, 2, 3) = null
+     * </pre>
+     *
+     * @param value  the Integer to convert
+     * @param trueValue  the value to match for {@code true}
+     * @param falseValue  the value to match for {@code false}
+     * @param nullValue  the value to to match for {@code null}
+     * @return Boolean.TRUE, Boolean.FALSE, or {@code null}
+     * @throws IllegalArgumentException if no match
+     */
+    public static Boolean toBooleanObject(final int value, final int trueValue, final int falseValue, final int nullValue) {
+        if (value == trueValue) {
+            return Boolean.TRUE;
+        }
+        if (value == falseValue) {
+            return Boolean.FALSE;
+        }
+        if (value == nullValue) {
+            return null;
+        }
+        // no match
+        throw new IllegalArgumentException("The Integer did not match any specified value");
+    }
+
+    /**
+     * <p>Converts an Integer to a Boolean specifying the conversion values.</p>
+     *
+     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
+     *
+     * <pre>
+     *   BooleanUtils.toBooleanObject(Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(2), Integer.valueOf(3)) = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3)) = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject(Integer.valueOf(3), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3)) = null
+     * </pre>
+     *
+     * @param value  the Integer to convert
+     * @param trueValue  the value to match for {@code true}, may be {@code null}
+     * @param falseValue  the value to match for {@code false}, may be {@code null}
+     * @param nullValue  the value to to match for {@code null}, may be {@code null}
+     * @return Boolean.TRUE, Boolean.FALSE, or {@code null}
+     * @throws IllegalArgumentException if no match
+     */
+    public static Boolean toBooleanObject(final Integer value, final Integer trueValue, final Integer falseValue, final Integer nullValue) {
+        if (value == null) {
+            if (trueValue == null) {
+                return Boolean.TRUE;
+            }
+            if (falseValue == null) {
+                return Boolean.FALSE;
+            }
+            if (nullValue == null) {
+                return null;
+            }
+        } else if (value.equals(trueValue)) {
+            return Boolean.TRUE;
+        } else if (value.equals(falseValue)) {
+            return Boolean.FALSE;
+        } else if (value.equals(nullValue)) {
+            return null;
+        }
+        // no match
+        throw new IllegalArgumentException("The Integer did not match any specified value");
+    }
+
+    // Boolean to Integer methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts a boolean to an int using the convention that
+     * {@code zero} is {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toInteger(true)  = 1
+     *   BooleanUtils.toInteger(false) = 0
+     * </pre>
+     *
+     * @param bool  the boolean to convert
+     * @return one if {@code true}, zero if {@code false}
+     */
+    public static int toInteger(final boolean bool) {
+        return bool ? 1 : 0;
+    }
+
+    /**
+     * <p>Converts a boolean to an Integer using the convention that
+     * {@code zero} is {@code false}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toIntegerObject(true)  = Integer.valueOf(1)
+     *   BooleanUtils.toIntegerObject(false) = Integer.valueOf(0)
+     * </pre>
+     *
+     * @param bool  the boolean to convert
+     * @return one if {@code true}, zero if {@code false}
+     */
+    public static Integer toIntegerObject(final boolean bool) {
+        return bool ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
+    }
+
+    /**
+     * <p>Converts a Boolean to a Integer using the convention that
+     * {@code zero} is {@code false}.</p>
+     *
+     * <p>{@code null} will be converted to {@code null}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toIntegerObject(Boolean.TRUE)  = Integer.valueOf(1)
+     *   BooleanUtils.toIntegerObject(Boolean.FALSE) = Integer.valueOf(0)
+     * </pre>
+     *
+     * @param bool  the Boolean to convert
+     * @return one if Boolean.TRUE, zero if Boolean.FALSE, {@code null} if {@code null}
+     */
+    public static Integer toIntegerObject(final Boolean bool) {
+        if (bool == null) {
+            return null;
+        }
+        return bool.booleanValue() ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
+    }
+
+    /**
+     * <p>Converts a boolean to an int specifying the conversion values.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toInteger(true, 1, 0)  = 1
+     *   BooleanUtils.toInteger(false, 1, 0) = 0
+     * </pre>
+     *
+     * @param bool  the to convert
+     * @param trueValue  the value to return if {@code true}
+     * @param falseValue  the value to return if {@code false}
+     * @return the appropriate value
+     */
+    public static int toInteger(final boolean bool, final int trueValue, final int falseValue) {
+        return bool ? trueValue : falseValue;
+    }
+
+    /**
+     * <p>Converts a Boolean to an int specifying the conversion values.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toInteger(Boolean.TRUE, 1, 0, 2)  = 1
+     *   BooleanUtils.toInteger(Boolean.FALSE, 1, 0, 2) = 0
+     *   BooleanUtils.toInteger(null, 1, 0, 2)          = 2
+     * </pre>
+     *
+     * @param bool  the Boolean to convert
+     * @param trueValue  the value to return if {@code true}
+     * @param falseValue  the value to return if {@code false}
+     * @param nullValue  the value to return if {@code null}
+     * @return the appropriate value
+     */
+    public static int toInteger(final Boolean bool, final int trueValue, final int falseValue, final int nullValue) {
+        if (bool == null) {
+            return nullValue;
+        }
+        return bool.booleanValue() ? trueValue : falseValue;
+    }
+
+    /**
+     * <p>Converts a boolean to an Integer specifying the conversion values.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toIntegerObject(true, Integer.valueOf(1), Integer.valueOf(0))  = Integer.valueOf(1)
+     *   BooleanUtils.toIntegerObject(false, Integer.valueOf(1), Integer.valueOf(0)) = Integer.valueOf(0)
+     * </pre>
+     *
+     * @param bool  the to convert
+     * @param trueValue  the value to return if {@code true}, may be {@code null}
+     * @param falseValue  the value to return if {@code false}, may be {@code null}
+     * @return the appropriate value
+     */
+    public static Integer toIntegerObject(final boolean bool, final Integer trueValue, final Integer falseValue) {
+        return bool ? trueValue : falseValue;
+    }
+
+    /**
+     * <p>Converts a Boolean to an Integer specifying the conversion values.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toIntegerObject(Boolean.TRUE, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2))  = Integer.valueOf(1)
+     *   BooleanUtils.toIntegerObject(Boolean.FALSE, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2)) = Integer.valueOf(0)
+     *   BooleanUtils.toIntegerObject(null, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2))          = Integer.valueOf(2)
+     * </pre>
+     *
+     * @param bool  the Boolean to convert
+     * @param trueValue  the value to return if {@code true}, may be {@code null}
+     * @param falseValue  the value to return if {@code false}, may be {@code null}
+     * @param nullValue  the value to return if {@code null}, may be {@code null}
+     * @return the appropriate value
+     */
+    public static Integer toIntegerObject(final Boolean bool, final Integer trueValue, final Integer falseValue, final Integer nullValue) {
+        if (bool == null) {
+            return nullValue;
+        }
+        return bool.booleanValue() ? trueValue : falseValue;
+    }
+
+    // String to Boolean methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts a String to a Boolean.</p>
+     *
+     * <p>{@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'} or {@code 'yes'}
+     * (case insensitive) will return {@code true}.
+     * {@code 'false'}, {@code 'off'}, {@code 'n'}, {@code 'f'} or {@code 'no'}
+     * (case insensitive) will return {@code false}.
+     * Otherwise, {@code null} is returned.</p>
+     *
+     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
+     *
+     * <pre>
+     *   // N.B. case is not significant
+     *   BooleanUtils.toBooleanObject(null)    = null
+     *   BooleanUtils.toBooleanObject("true")  = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject("T")     = Boolean.TRUE // i.e. T[RUE]
+     *   BooleanUtils.toBooleanObject("false") = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject("f")     = Boolean.FALSE // i.e. f[alse]
+     *   BooleanUtils.toBooleanObject("No")    = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject("n")     = Boolean.FALSE // i.e. n[o]
+     *   BooleanUtils.toBooleanObject("on")    = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject("ON")    = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject("off")   = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject("oFf")   = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject("yes")   = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject("Y")     = Boolean.TRUE // i.e. Y[ES]
+     *   BooleanUtils.toBooleanObject("blue")  = null
+     *   BooleanUtils.toBooleanObject("true ") = null // trailing space (too long)
+     *   BooleanUtils.toBooleanObject("ono")   = null // does not match on or no
+     * </pre>
+     *
+     * @param str  the String to check; upper and lower case are treated as the same
+     * @return the Boolean value of the string, {@code null} if no match or {@code null} input
+     */
+    public static Boolean toBooleanObject(final String str) {
+        // Previously used equalsIgnoreCase, which was fast for interned 'true'.
+        // Non interned 'true' matched 15 times slower.
+        //
+        // Optimisation provides same performance as before for interned 'true'.
+        // Similar performance for null, 'false', and other strings not length 2/3/4.
+        // 'true'/'TRUE' match 4 times slower, 'tRUE'/'True' 7 times slower.
+        if (str == "true") {
+            return Boolean.TRUE;
+        }
+        if (str == null) {
+            return null;
+        }
+        switch (str.length()) {
+            case 1: {
+                final char ch0 = str.charAt(0);
+                if (ch0 == 'y' || ch0 == 'Y' ||
+                    ch0 == 't' || ch0 == 'T') {
+                    return Boolean.TRUE;
+                }
+                if (ch0 == 'n' || ch0 == 'N' ||
+                    ch0 == 'f' || ch0 == 'F') {
+                    return Boolean.FALSE;
+                }
+                break;
+            }
+            case 2: {
+                final char ch0 = str.charAt(0);
+                final char ch1 = str.charAt(1);
+                if ((ch0 == 'o' || ch0 == 'O') &&
+                    (ch1 == 'n' || ch1 == 'N') ) {
+                    return Boolean.TRUE;
+                }
+                if ((ch0 == 'n' || ch0 == 'N') &&
+                    (ch1 == 'o' || ch1 == 'O') ) {
+                    return Boolean.FALSE;
+                }
+                break;
+            }
+            case 3: {
+                final char ch0 = str.charAt(0);
+                final char ch1 = str.charAt(1);
+                final char ch2 = str.charAt(2);
+                if ((ch0 == 'y' || ch0 == 'Y') &&
+                    (ch1 == 'e' || ch1 == 'E') &&
+                    (ch2 == 's' || ch2 == 'S') ) {
+                    return Boolean.TRUE;
+                }
+                if ((ch0 == 'o' || ch0 == 'O') &&
+                    (ch1 == 'f' || ch1 == 'F') &&
+                    (ch2 == 'f' || ch2 == 'F') ) {
+                    return Boolean.FALSE;
+                }
+                break;
+            }
+            case 4: {
+                final char ch0 = str.charAt(0);
+                final char ch1 = str.charAt(1);
+                final char ch2 = str.charAt(2);
+                final char ch3 = str.charAt(3);
+                if ((ch0 == 't' || ch0 == 'T') &&
+                    (ch1 == 'r' || ch1 == 'R') &&
+                    (ch2 == 'u' || ch2 == 'U') &&
+                    (ch3 == 'e' || ch3 == 'E') ) {
+                    return Boolean.TRUE;
+                }
+                break;
+            }
+            case 5: {
+                final char ch0 = str.charAt(0);
+                final char ch1 = str.charAt(1);
+                final char ch2 = str.charAt(2);
+                final char ch3 = str.charAt(3);
+                final char ch4 = str.charAt(4);
+                if ((ch0 == 'f' || ch0 == 'F') &&
+                    (ch1 == 'a' || ch1 == 'A') &&
+                    (ch2 == 'l' || ch2 == 'L') &&
+                    (ch3 == 's' || ch3 == 'S') &&
+                    (ch4 == 'e' || ch4 == 'E') ) {
+                    return Boolean.FALSE;
+                }
+                break;
+            }
+        default:
+            break;
+        }
+
+        return null;
+    }
+
+    /**
+     * <p>Converts a String to a Boolean throwing an exception if no match.</p>
+     *
+     * <p>NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean. </p>
+     *
+     * <pre>
+     *   BooleanUtils.toBooleanObject("true", "true", "false", "null")  = Boolean.TRUE
+     *   BooleanUtils.toBooleanObject("false", "true", "false", "null") = Boolean.FALSE
+     *   BooleanUtils.toBooleanObject("null", "true", "false", "null")  = null
+     * </pre>
+     *
+     * @param str  the String to check
+     * @param trueString  the String to match for {@code true} (case sensitive), may be {@code null}
+     * @param falseString  the String to match for {@code false} (case sensitive), may be {@code null}
+     * @param nullString  the String to match for {@code null} (case sensitive), may be {@code null}
+     * @return the Boolean value of the string, {@code null} if either the String matches {@code nullString}
+     *  or if {@code null} input and {@code nullString} is {@code null}
+     * @throws IllegalArgumentException if the String doesn't match
+     */
+    public static Boolean toBooleanObject(final String str, final String trueString, final String falseString, final String nullString) {
+        if (str == null) {
+            if (trueString == null) {
+                return Boolean.TRUE;
+            }
+            if (falseString == null) {
+                return Boolean.FALSE;
+            }
+            if (nullString == null) {
+                return null;
+            }
+        } else if (str.equals(trueString)) {
+            return Boolean.TRUE;
+        } else if (str.equals(falseString)) {
+            return Boolean.FALSE;
+        } else if (str.equals(nullString)) {
+            return null;
+        }
+        // no match
+        throw new IllegalArgumentException("The String did not match any specified value");
+    }
+
+    // String to boolean methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts a String to a boolean (optimised for performance).</p>
+     *
+     * <p>{@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'} or {@code 'yes'}
+     * (case insensitive) will return {@code true}. Otherwise,
+     * {@code false} is returned.</p>
+     *
+     * <p>This method performs 4 times faster (JDK1.4) than
+     * {@code Boolean.valueOf(String)}. However, this method accepts
+     * 'on' and 'yes', 't', 'y' as true values.
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean(null)    = false
+     *   BooleanUtils.toBoolean("true")  = true
+     *   BooleanUtils.toBoolean("TRUE")  = true
+     *   BooleanUtils.toBoolean("tRUe")  = true
+     *   BooleanUtils.toBoolean("on")    = true
+     *   BooleanUtils.toBoolean("yes")   = true
+     *   BooleanUtils.toBoolean("false") = false
+     *   BooleanUtils.toBoolean("x gti") = false
+     *   BooleanUtils.toBooleanObject("y") = true
+     *   BooleanUtils.toBooleanObject("n") = false
+     *   BooleanUtils.toBooleanObject("t") = true
+     *   BooleanUtils.toBooleanObject("f") = false 
+     * </pre>
+     *
+     * @param str  the String to check
+     * @return the boolean value of the string, {@code false} if no match or the String is null
+     */
+    public static boolean toBoolean(final String str) {
+        return toBooleanObject(str) == Boolean.TRUE;
+    }
+
+    /**
+     * <p>Converts a String to a Boolean throwing an exception if no match found.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toBoolean("true", "true", "false")  = true
+     *   BooleanUtils.toBoolean("false", "true", "false") = false
+     * </pre>
+     *
+     * @param str  the String to check
+     * @param trueString  the String to match for {@code true} (case sensitive), may be {@code null}
+     * @param falseString  the String to match for {@code false} (case sensitive), may be {@code null}
+     * @return the boolean value of the string
+     * @throws IllegalArgumentException if the String doesn't match
+     */
+    public static boolean toBoolean(final String str, final String trueString, final String falseString) {
+        if (str == trueString) {
+            return true;
+        } else if (str == falseString) {
+            return false;
+        } else if (str != null) {
+            if (str.equals(trueString)) {
+                return true;
+            } else if (str.equals(falseString)) {
+                return false;
+            }
+        }
+        // no match
+        throw new IllegalArgumentException("The String did not match either specified value");
+    }
+
+    // Boolean to String methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts a Boolean to a String returning {@code 'true'},
+     * {@code 'false'}, or {@code null}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toStringTrueFalse(Boolean.TRUE)  = "true"
+     *   BooleanUtils.toStringTrueFalse(Boolean.FALSE) = "false"
+     *   BooleanUtils.toStringTrueFalse(null)          = null;
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @return {@code 'true'}, {@code 'false'}, or {@code null}
+     */
+    public static String toStringTrueFalse(final Boolean bool) {
+        return toString(bool, "true", "false", null);
+    }
+
+    /**
+     * <p>Converts a Boolean to a String returning {@code 'on'},
+     * {@code 'off'}, or {@code null}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toStringOnOff(Boolean.TRUE)  = "on"
+     *   BooleanUtils.toStringOnOff(Boolean.FALSE) = "off"
+     *   BooleanUtils.toStringOnOff(null)          = null;
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @return {@code 'on'}, {@code 'off'}, or {@code null}
+     */
+    public static String toStringOnOff(final Boolean bool) {
+        return toString(bool, "on", "off", null);
+    }
+
+    /**
+     * <p>Converts a Boolean to a String returning {@code 'yes'},
+     * {@code 'no'}, or {@code null}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toStringYesNo(Boolean.TRUE)  = "yes"
+     *   BooleanUtils.toStringYesNo(Boolean.FALSE) = "no"
+     *   BooleanUtils.toStringYesNo(null)          = null;
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @return {@code 'yes'}, {@code 'no'}, or {@code null}
+     */
+    public static String toStringYesNo(final Boolean bool) {
+        return toString(bool, "yes", "no", null);
+    }
+
+    /**
+     * <p>Converts a Boolean to a String returning one of the input Strings.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toString(Boolean.TRUE, "true", "false", null)   = "true"
+     *   BooleanUtils.toString(Boolean.FALSE, "true", "false", null)  = "false"
+     *   BooleanUtils.toString(null, "true", "false", null)           = null;
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @param trueString  the String to return if {@code true}, may be {@code null}
+     * @param falseString  the String to return if {@code false}, may be {@code null}
+     * @param nullString  the String to return if {@code null}, may be {@code null}
+     * @return one of the three input Strings
+     */
+    public static String toString(final Boolean bool, final String trueString, final String falseString, final String nullString) {
+        if (bool == null) {
+            return nullString;
+        }
+        return bool.booleanValue() ? trueString : falseString;
+    }
+
+    // boolean to String methods
+    //-----------------------------------------------------------------------
+    /**
+     * <p>Converts a boolean to a String returning {@code 'true'}
+     * or {@code 'false'}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toStringTrueFalse(true)   = "true"
+     *   BooleanUtils.toStringTrueFalse(false)  = "false"
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @return {@code 'true'}, {@code 'false'}, or {@code null}
+     */
+    public static String toStringTrueFalse(final boolean bool) {
+        return toString(bool, "true", "false");
+    }
+
+    /**
+     * <p>Converts a boolean to a String returning {@code 'on'}
+     * or {@code 'off'}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toStringOnOff(true)   = "on"
+     *   BooleanUtils.toStringOnOff(false)  = "off"
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @return {@code 'on'}, {@code 'off'}, or {@code null}
+     */
+    public static String toStringOnOff(final boolean bool) {
+        return toString(bool, "on", "off");
+    }
+
+    /**
+     * <p>Converts a boolean to a String returning {@code 'yes'}
+     * or {@code 'no'}.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toStringYesNo(true)   = "yes"
+     *   BooleanUtils.toStringYesNo(false)  = "no"
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @return {@code 'yes'}, {@code 'no'}, or {@code null}
+     */
+    public static String toStringYesNo(final boolean bool) {
+        return toString(bool, "yes", "no");
+    }
+
+    /**
+     * <p>Converts a boolean to a String returning one of the input Strings.</p>
+     *
+     * <pre>
+     *   BooleanUtils.toString(true, "true", "false")   = "true"
+     *   BooleanUtils.toString(false, "true", "false")  = "false"
+     * </pre>
+     *
+     * @param bool  the Boolean to check
+     * @param trueString  the String to return if {@code true}, may be {@code null}
+     * @param falseString  the String to return if {@code false}, may be {@code null}
+     * @return one of the two input Strings
+     */
+    public static String toString(final boolean bool, final String trueString, final String falseString) {
+        return bool ? trueString : falseString;
+    }
+
+    // logical operations
+    // ----------------------------------------------------------------------
+    /**
+     * <p>Performs an and on a set of booleans.</p>
+     *
+     * <pre>
+     *   BooleanUtils.and(true, true)         = true
+     *   BooleanUtils.and(false, false)       = false
+     *   BooleanUtils.and(true, false)        = false
+     *   BooleanUtils.and(true, true, false)  = false
+     *   BooleanUtils.and(true, true, true)   = true
+     * </pre>
+     *
+     * @param array  an array of {@code boolean}s
+     * @return {@code true} if the and is successful.
+     * @throws IllegalArgumentException if {@code array} is {@code null}
+     * @throws IllegalArgumentException if {@code array} is empty.
+     * @since 3.0.1
+     */
+    public static boolean and(final boolean... array) {
+        // Validates input
+        if (array == null) {
+            throw new IllegalArgumentException("The Array must not be null");
+        }
+        if (array.length == 0) {
+            throw new IllegalArgumentException("Array is empty");
+        }
+        for (final boolean element : array) {
+            if (!element) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * <p>Performs an and on an array of Booleans.</p>
+     *
+     * <pre>
+     *   BooleanUtils.and(Boolean.TRUE, Boolean.TRUE)                 = Boolean.TRUE
+     *   BooleanUtils.and(Boolean.FALSE, Boolean.FALSE)               = Boolean.FALSE
+     *   BooleanUtils.and(Boolean.TRUE, Boolean.FALSE)                = Boolean.FALSE
+     *   BooleanUtils.and(Boolean.TRUE, Boolean.TRUE, Boolean.TRUE)   = Boolean.TRUE
+     *   BooleanUtils.and(Boolean.FALSE, Boolean.FALSE, Boolean.TRUE) = Boolean.FALSE
+     *   BooleanUtils.and(Boolean.TRUE, Boolean.FALSE, Boolean.TRUE)  = Boolean.FALSE
+     * </pre>
+     *
+     * @param array  an array of {@code Boolean}s
+     * @return {@code true} if the and is successful.
+     * @throws IllegalArgumentException if {@code array} is {@code null}
+     * @throws IllegalArgumentException if {@code array} is empty.
+     * @throws IllegalArgumentException if {@code array} contains a {@code null}
+     * @since 3.0.1
+     */
+    public static Boolean and(final Boolean... array) {
+        if (array == null) {
+            throw new IllegalArgumentException("The Array must not be null");
+        }
+        if (array.length == 0) {
+            throw new IllegalArgumentException("Array is empty");
+        }
+        try {
+            final boolean[] primitive = ArrayUtils.toPrimitive(array);
+            return and(primitive) ? Boolean.TRUE : Boolean.FALSE;
+        } catch (final NullPointerException ex) {
+            throw new IllegalArgumentException("The array must not contain any null elements");
+        }
+    }
+
+    /**
+     * <p>Performs an or on a set of booleans.</p>
+     *
+     * <pre>
+     *   BooleanUtils.or(true, true)          = true
+     *   BooleanUtils.or(false, false)        = false
+     *   BooleanUtils.or(true, false)         = true
+     *   BooleanUtils.or(true, true, false)   = true
+     *   BooleanUtils.or(true, true, true)    = true
+     *   BooleanUtils.or(false, false, false) = false
+     * </pre>
+     *
+     * @param array  an array of {@code boolean}s
+     * @return {@code true} if the or is successful.
+     * @throws IllegalArgumentException if {@code array} is {@code null}
+     * @throws IllegalArgumentException if {@code array} is empty.
+     * @since 3.0.1
+     */
+    public static boolean or(final boolean... array) {
+        // Validates input
+        if (array == null) {
+            throw new IllegalArgumentException("The Array must not be null");
+        }
+        if (array.length == 0) {
+            throw new IllegalArgumentException("Array is empty");
+        }
+        for (final boolean element : array) {
+            if (element) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * <p>Performs an or on an array of Booleans.</p>
+     *
+     * <pre>
+     *   BooleanUtils.or(Boolean.TRUE, Boolean.TRUE)                  = Boolean.TRUE
+     *   BooleanUtils.or(Boolean.FALSE, Boolean.FALSE)                = Boolean.FALSE
+     *   BooleanUtils.or(Boolean.TRUE, Boolean.FALSE)                 = Boolean.TRUE
+     *   BooleanUtils.or(Boolean.TRUE, Boolean.TRUE, Boolean.TRUE)    = Boolean.TRUE
+     *   BooleanUtils.or(Boolean.FALSE, Boolean.FALSE, Boolean.TRUE)  = Boolean.TRUE
+     *   BooleanUtils.or(Boolean.TRUE, Boolean.FALSE, Boolean.TRUE)   = Boolean.TRUE
+     *   BooleanUtils.or(Boolean.FALSE, Boolean.FALSE, Boolean.FALSE) = Boolean.FALSE
+     * </pre>
+     *
+     * @param array  an array of {@code Boolean}s
+     * @return {@code true} if the or is successful.
+     * @throws IllegalArgumentException if {@code array} is {@code null}
+     * @throws IllegalArgumentException if {@code array} is empty.
+     * @throws IllegalArgumentException if {@code array} contains a {@code null}
+     * @since 3.0.1
+     */
+    public static Boolean or(final Boolean... array) {
+        if (array == null) {
+            throw new IllegalArgumentException("The Array must not be null");
+        }
+        if (array.length == 0) {
+            throw new IllegalArgumentException("Array is empty");
+        }
+        try {
+            final boolean[] primitive = ArrayUtils.toPrimitive(array);
+            return or(primitive) ? Boolean.TRUE : Boolean.FALSE;
+        } catch (final NullPointerException ex) {
+            throw new IllegalArgumentException("The array must not contain any null elements");
+        }
+    }
+
+    /**
+     * <p>Performs an xor on a set of booleans.</p>
+     *
+     * <pre>
+     *   BooleanUtils.xor(true, true)   = false
+     *   BooleanUtils.xor(false, false) = false
+     *   BooleanUtils.xor(true, false)  = true
+     *   BooleanUtils.xor(true, true)   = false
+     *   BooleanUtils.xor(false, false) = false
+     *   BooleanUtils.xor(true, false)  = true
+     * </pre>
+     *
+     * @param array  an array of {@code boolean}s
+     * @return {@code true} if the xor is successful.
+     * @throws IllegalArgumentException if {@code array} is {@code null}
+     * @throws IllegalArgumentException if {@code array} is empty.
+     */
+    public static boolean xor(final boolean... array) {
+        // Validates input
+        if (array == null) {
+            throw new IllegalArgumentException("The Array must not be null");
+        }
+        if (array.length == 0) {
+            throw new IllegalArgumentException("Array is empty");
+        }
+
+        // false if the neutral element of the xor operator
+        boolean result = false;
+        for (final boolean element : array) {
+            result ^= element;
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Performs an xor on an array of Booleans.</p>
+     *
+     * <pre>
+     *   BooleanUtils.xor(new Boolean[] { Boolean.TRUE, Boolean.TRUE })   = Boolean.FALSE
+     *   BooleanUtils.xor(new Boolean[] { Boolean.FALSE, Boolean.FALSE }) = Boolean.FALSE
+     *   BooleanUtils.xor(new Boolean[] { Boolean.TRUE, Boolean.FALSE })  = Boolean.TRUE
+     * </pre>
+     *
+     * @param array  an array of {@code Boolean}s
+     * @return {@code true} if the xor is successful.
+     * @throws IllegalArgumentException if {@code array} is {@code null}
+     * @throws IllegalArgumentException if {@code array} is empty.
+     * @throws IllegalArgumentException if {@code array} contains a {@code null}
+     */
+    public static Boolean xor(final Boolean... array) {
+        if (array == null) {
+            throw new IllegalArgumentException("The Array must not be null");
+        }
+        if (array.length == 0) {
+            throw new IllegalArgumentException("Array is empty");
+        }
+        try {
+            final boolean[] primitive = ArrayUtils.toPrimitive(array);
+            return xor(primitive) ? Boolean.TRUE : Boolean.FALSE;
+        } catch (final NullPointerException ex) {
+            throw new IllegalArgumentException("The array must not contain any null elements");
+        }
+    }
+
+    /**
+     * <p>Compares two {@code boolean} values. This is the same functionality as provided in Java 7.</p>
+     *
+     * @param x the first {@code boolean} to compare
+     * @param y the second {@code boolean} to compare
+     * @return the value {@code 0} if {@code x == y};
+     *         a value less than {@code 0} if {@code !x && y}; and
+     *         a value greater than {@code 0} if {@code x && !y}
+     * @since 3.4
+     */
+    public static int compare(boolean x, boolean y) {
+        if (x == y) {
+            return 0;
+        }
+        return x ? 1 : -1;
+    }
+
+}


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