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From cziege...@apache.org
Subject svn commit: r590981 [2/3] - in /incubator/sling/trunk: ./ json/ json/src/ json/src/main/ json/src/main/java/ json/src/main/java/org/ json/src/main/java/org/apache/ json/src/main/java/org/apache/sling/ json/src/main/java/org/apache/sling/json/ json/src/...
Date Thu, 01 Nov 2007 12:35:40 GMT
Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONObject.java
URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONObject.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONObject.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONObject.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,1259 @@
+package org.apache.sling.json;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import java.io.IOException;
+import java.io.Writer;
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * A JSONObject is an unordered collection of name/value pairs. Its
+ * external form is a string wrapped in curly braces with colons between the
+ * names and values, and commas between the values and names. The internal form
+ * is an object having <code>get</code> and <code>opt</code> methods for
+ * accessing the values by name, and <code>put</code> methods for adding or
+ * replacing values by name. The values can be any of these types:
+ * <code>Boolean</code>, <code>JSONArray</code>, <code>JSONObject</code>,
+ * <code>Number</code>, <code>String</code>, or the <code>JSONObject.NULL</code>
+ * object. A JSONObject constructor can be used to convert an external form
+ * JSON text into an internal form whose values can be retrieved with the
+ * <code>get</code> and <code>opt</code> methods, or to convert values into a
+ * JSON text using the <code>put</code> and <code>toString</code> methods.
+ * A <code>get</code> method returns a value if one can be found, and throws an
+ * exception if one cannot be found. An <code>opt</code> method returns a
+ * default value instead of throwing an exception, and so is useful for
+ * obtaining optional values.
+ * <p>
+ * The generic <code>get()</code> and <code>opt()</code> methods return an
+ * object, which you can cast or query for type. There are also typed
+ * <code>get</code> and <code>opt</code> methods that do type checking and type
+ * coersion for you.
+ * <p>
+ * The <code>put</code> methods adds values to an object. For example, <pre>
+ *     myString = new JSONObject().put("JSON", "Hello, World!").toString();</pre>
+ * produces the string <code>{"JSON": "Hello, World"}</code>.
+ * <p>
+ * The texts produced by the <code>toString</code> methods strictly conform to
+ * the JSON sysntax rules.
+ * The constructors are more forgiving in the texts they will accept:
+ * <ul>
+ * <li>An extra <code>,</code>&nbsp;<small>(comma)</small> may appear just
+ *     before the closing brace.</li>
+ * <li>Strings may be quoted with <code>'</code>&nbsp;<small>(single
+ *     quote)</small>.</li>
+ * <li>Strings do not need to be quoted at all if they do not begin with a quote
+ *     or single quote, and if they do not contain leading or trailing spaces,
+ *     and if they do not contain any of these characters:
+ *     <code>{ } [ ] / \ : , = ; #</code> and if they do not look like numbers
+ *     and if they are not the reserved words <code>true</code>,
+ *     <code>false</code>, or <code>null</code>.</li>
+ * <li>Keys can be followed by <code>=</code> or <code>=></code> as well as
+ *     by <code>:</code>.</li>
+ * <li>Values can be followed by <code>;</code> <small>(semicolon)</small> as
+ *     well as by <code>,</code> <small>(comma)</small>.</li>
+ * <li>Numbers may have the <code>0-</code> <small>(octal)</small> or
+ *     <code>0x-</code> <small>(hex)</small> prefix.</li>
+ * <li>Comments written in the slashshlash, slashstar, and hash conventions
+ *     will be ignored.</li>
+ * </ul>
+ * @author JSON.org
+ * @version 2
+ */
+public class JSONObject {
+
+    /**
+     * JSONObject.NULL is equivalent to the value that JavaScript calls null,
+     * whilst Java's null is equivalent to the value that JavaScript calls
+     * undefined.
+     */
+     private static final class Null {
+
+        /**
+         * There is only intended to be a single instance of the NULL object,
+         * so the clone method returns itself.
+         * @return     NULL.
+         */
+        protected final Object clone() {
+            return this;
+        }
+
+
+        /**
+         * A Null object is equal to the null value and to itself.
+         * @param object    An object to test for nullness.
+         * @return true if the object parameter is the JSONObject.NULL object
+         *  or null.
+         */
+        public boolean equals(Object object) {
+            return object == null || object == this;
+        }
+
+
+        /**
+         * Get the "null" string value.
+         * @return The string "null".
+         */
+        public String toString() {
+            return "null";
+        }
+    }
+
+
+    /**
+     * The hash map where the JSONObject's properties are kept.
+     */
+    private HashMap myHashMap;
+
+
+    /**
+     * It is sometimes more convenient and less ambiguous to have a
+     * <code>NULL</code> object than to use Java's <code>null</code> value.
+     * <code>JSONObject.NULL.equals(null)</code> returns <code>true</code>.
+     * <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>.
+     */
+    public static final Object NULL = new Null();
+
+
+    /**
+     * Construct an empty JSONObject.
+     */
+    public JSONObject() {
+        this.myHashMap = new HashMap();
+    }
+
+
+    /**
+     * Construct a JSONObject from a subset of another JSONObject.
+     * An array of strings is used to identify the keys that should be copied.
+     * Missing keys are ignored.
+     * @param jo A JSONObject.
+     * @param sa An array of strings.
+     * @exception JSONException If a value is a non-finite number.
+     */
+    public JSONObject(JSONObject jo, String[] sa) throws JSONException {
+        this();
+        for (int i = 0; i < sa.length; i += 1) {
+            putOpt(sa[i], jo.opt(sa[i]));
+        }
+    }
+
+
+    /**
+     * Construct a JSONObject from a JSONTokener.
+     * @param x A JSONTokener object containing the source string.
+     * @throws JSONException If there is a syntax error in the source string.
+     */
+    public JSONObject(JSONTokener x) throws JSONException {
+        this();
+        char c;
+        String key;
+
+        if (x.nextClean() != '{') {
+            throw x.syntaxError("A JSONObject text must begin with '{'");
+        }
+        for (;;) {
+            c = x.nextClean();
+            switch (c) {
+            case 0:
+                throw x.syntaxError("A JSONObject text must end with '}'");
+            case '}':
+                return;
+            default:
+                x.back();
+                key = x.nextValue().toString();
+            }
+
+            /*
+             * The key is followed by ':'. We will also tolerate '=' or '=>'.
+             */
+
+            c = x.nextClean();
+            if (c == '=') {
+                if (x.next() != '>') {
+                    x.back();
+                }
+            } else if (c != ':') {
+                throw x.syntaxError("Expected a ':' after a key");
+            }
+            put(key, x.nextValue());
+
+            /*
+             * Pairs are separated by ','. We will also tolerate ';'.
+             */
+
+            switch (x.nextClean()) {
+            case ';':
+            case ',':
+                if (x.nextClean() == '}') {
+                    return;
+                }
+                x.back();
+                break;
+            case '}':
+                return;
+            default:
+                throw x.syntaxError("Expected a ',' or '}'");
+            }
+        }
+    }
+
+
+    /**
+     * Construct a JSONObject from a Map.
+     * @param map A map object that can be used to initialize the contents of
+     *  the JSONObject.
+     */
+    public JSONObject(Map map) {
+        this.myHashMap = (map == null) ?
+        	new HashMap() :
+        	new HashMap(map);
+    }
+
+
+    /**
+     * Construct a JSONObject from an Object, using reflection to find the
+     * public members. The resulting JSONObject's keys will be the strings
+     * from the names array, and the values will be the field values associated
+     * with those keys in the object. If a key is not found or not visible,
+     * then it will not be copied into the new JSONObject.
+     * @param object An object that has fields that should be used to make a
+     * JSONObject.
+     * @param names An array of strings, the names of the fields to be used
+     * from the object.
+     */
+    public JSONObject(Object object, String names[]) {
+    	this();
+    	Class c = object.getClass();
+    	for (int i = 0; i < names.length; i += 1) {
+    		try {
+    			String name = names[i];
+    			Field field = c.getField(name);
+    			Object value = field.get(object);
+	    		this.put(name, value);
+    		} catch (Exception e) {
+    			/* forget about it */
+    		}
+    	}
+    }
+
+
+    /**
+     * Construct a JSONObject from a string.
+     * This is the most commonly used JSONObject constructor.
+     * @param string    A string beginning
+     *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
+     *  with <code>}</code>&nbsp;<small>(right brace)</small>.
+     * @exception JSONException If there is a syntax error in the source string.
+     */
+    public JSONObject(String string) throws JSONException {
+        this(new JSONTokener(string));
+    }
+
+
+    /**
+     * Accumulate values under a key. It is similar to the put method except
+     * that if there is already an object stored under the key then a
+     * JSONArray is stored under the key to hold all of the accumulated values.
+     * If there is already a JSONArray, then the new value is appended to it.
+     * In contrast, the put method replaces the previous value.
+     * @param key   A key string.
+     * @param value An object to be accumulated under the key.
+     * @return this.
+     * @throws JSONException If the value is an invalid number
+     *  or if the key is null.
+     */
+    public JSONObject accumulate(String key, Object value)
+            throws JSONException {
+        testValidity(value);
+        Object o = opt(key);
+        if (o == null) {
+            put(key, value);
+        } else if (o instanceof JSONArray) {
+            ((JSONArray)o).put(value);
+        } else {
+            put(key, new JSONArray().put(o).put(value));
+        }
+        return this;
+    }
+
+
+    /**
+     * Append values to the array under a key. If the key does not exist in the
+     * JSONObject, then the key is put in the JSONObject with its value being a
+     * JSONArray containing the value parameter. If the key was already
+     * associated with a JSONArray, then the value parameter is appended to it.
+     * @param key   A key string.
+     * @param value An object to be accumulated under the key.
+     * @return this.
+     * @throws JSONException If the key is null or if the current value
+     * 	associated with the key is not a JSONArray.
+     */
+    public JSONObject append(String key, Object value)
+            throws JSONException {
+        testValidity(value);
+        Object o = opt(key);
+        if (o == null) {
+            put(key, new JSONArray().put(value));
+        } else if (o instanceof JSONArray) {
+            throw new JSONException("JSONObject[" + key +
+            		"] is not a JSONArray.");
+        } else {
+            put(key, new JSONArray().put(o).put(value));
+        }
+        return this;
+    }
+
+
+    /**
+     * Produce a string from a double. The string "null" will be returned if
+     * the number is not finite.
+     * @param  d A double.
+     * @return A String.
+     */
+    static public String doubleToString(double d) {
+        if (Double.isInfinite(d) || Double.isNaN(d)) {
+        	return "null";
+        }
+
+// Shave off trailing zeros and decimal point, if possible.
+
+        String s = Double.toString(d);
+        if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0) {
+            while (s.endsWith("0")) {
+                s = s.substring(0, s.length() - 1);
+            }
+            if (s.endsWith(".")) {
+                s = s.substring(0, s.length() - 1);
+            }
+        }
+        return s;
+    }
+
+
+    /**
+     * Get the value object associated with a key.
+     *
+     * @param key   A key string.
+     * @return      The object associated with the key.
+     * @throws   JSONException if the key is not found.
+     */
+    public Object get(String key) throws JSONException {
+        Object o = opt(key);
+        if (o == null) {
+            throw new JSONException("JSONObject[" + quote(key) +
+                    "] not found.");
+        }
+        return o;
+    }
+
+
+    /**
+     * Get the boolean value associated with a key.
+     *
+     * @param key   A key string.
+     * @return      The truth.
+     * @throws   JSONException
+     *  if the value is not a Boolean or the String "true" or "false".
+     */
+    public boolean getBoolean(String key) throws JSONException {
+        Object o = get(key);
+        if (o.equals(Boolean.FALSE) ||
+                (o instanceof String &&
+                ((String)o).equalsIgnoreCase("false"))) {
+            return false;
+        } else if (o.equals(Boolean.TRUE) ||
+                (o instanceof String &&
+                ((String)o).equalsIgnoreCase("true"))) {
+            return true;
+        }
+        throw new JSONException("JSONObject[" + quote(key) +
+                "] is not a Boolean.");
+    }
+
+
+    /**
+     * Get the double value associated with a key.
+     * @param key   A key string.
+     * @return      The numeric value.
+     * @throws JSONException if the key is not found or
+     *  if the value is not a Number object and cannot be converted to a number.
+     */
+    public double getDouble(String key) throws JSONException {
+        Object o = get(key);
+        try {
+            return o instanceof Number ?
+                ((Number)o).doubleValue() :
+                Double.valueOf((String)o).doubleValue();
+        } catch (Exception e) {
+            throw new JSONException("JSONObject[" + quote(key) +
+                "] is not a number.");
+        }
+    }
+
+
+    /**
+     * Get the int value associated with a key. If the number value is too
+     * large for an int, it will be clipped.
+     *
+     * @param key   A key string.
+     * @return      The integer value.
+     * @throws   JSONException if the key is not found or if the value cannot
+     *  be converted to an integer.
+     */
+    public int getInt(String key) throws JSONException {
+        Object o = get(key);
+        return o instanceof Number ?
+                ((Number)o).intValue() : (int)getDouble(key);
+    }
+
+
+    /**
+     * Get the JSONArray value associated with a key.
+     *
+     * @param key   A key string.
+     * @return      A JSONArray which is the value.
+     * @throws   JSONException if the key is not found or
+     *  if the value is not a JSONArray.
+     */
+    public JSONArray getJSONArray(String key) throws JSONException {
+        Object o = get(key);
+        if (o instanceof JSONArray) {
+            return (JSONArray)o;
+        }
+        throw new JSONException("JSONObject[" + quote(key) +
+                "] is not a JSONArray.");
+    }
+
+
+    /**
+     * Get the JSONObject value associated with a key.
+     *
+     * @param key   A key string.
+     * @return      A JSONObject which is the value.
+     * @throws   JSONException if the key is not found or
+     *  if the value is not a JSONObject.
+     */
+    public JSONObject getJSONObject(String key) throws JSONException {
+        Object o = get(key);
+        if (o instanceof JSONObject) {
+            return (JSONObject)o;
+        }
+        throw new JSONException("JSONObject[" + quote(key) +
+                "] is not a JSONObject.");
+    }
+
+
+    /**
+     * Get the long value associated with a key. If the number value is too
+     * long for a long, it will be clipped.
+     *
+     * @param key   A key string.
+     * @return      The long value.
+     * @throws   JSONException if the key is not found or if the value cannot
+     *  be converted to a long.
+     */
+    public long getLong(String key) throws JSONException {
+        Object o = get(key);
+        return o instanceof Number ?
+                ((Number)o).longValue() : (long)getDouble(key);
+    }
+
+
+    /**
+     * Get the string associated with a key.
+     *
+     * @param key   A key string.
+     * @return      A string which is the value.
+     * @throws   JSONException if the key is not found.
+     */
+    public String getString(String key) throws JSONException {
+        return get(key).toString();
+    }
+
+
+    /**
+     * Determine if the JSONObject contains a specific key.
+     * @param key   A key string.
+     * @return      true if the key exists in the JSONObject.
+     */
+    public boolean has(String key) {
+        return this.myHashMap.containsKey(key);
+    }
+
+
+    /**
+     * Determine if the value associated with the key is null or if there is
+     *  no value.
+     * @param key   A key string.
+     * @return      true if there is no value associated with the key or if
+     *  the value is the JSONObject.NULL object.
+     */
+    public boolean isNull(String key) {
+        return JSONObject.NULL.equals(opt(key));
+    }
+
+
+    /**
+     * Get an enumeration of the keys of the JSONObject.
+     *
+     * @return An iterator of the keys.
+     */
+    public Iterator keys() {
+        return this.myHashMap.keySet().iterator();
+    }
+
+
+    /**
+     * Get the number of keys stored in the JSONObject.
+     *
+     * @return The number of keys in the JSONObject.
+     */
+    public int length() {
+        return this.myHashMap.size();
+    }
+
+
+    /**
+     * Produce a JSONArray containing the names of the elements of this
+     * JSONObject.
+     * @return A JSONArray containing the key strings, or null if the JSONObject
+     * is empty.
+     */
+    public JSONArray names() {
+        JSONArray ja = new JSONArray();
+        Iterator  keys = keys();
+        while (keys.hasNext()) {
+            ja.put(keys.next());
+        }
+        return ja.length() == 0 ? null : ja;
+    }
+
+    /**
+     * Produce a string from a Number.
+     * @param  n A Number
+     * @return A String.
+     * @throws JSONException If n is a non-finite number.
+     */
+    static public String numberToString(Number n)
+            throws JSONException {
+        if (n == null) {
+            throw new JSONException("Null pointer");
+        }
+        testValidity(n);
+
+// Shave off trailing zeros and decimal point, if possible.
+
+        String s = n.toString();
+        if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0) {
+            while (s.endsWith("0")) {
+                s = s.substring(0, s.length() - 1);
+            }
+            if (s.endsWith(".")) {
+                s = s.substring(0, s.length() - 1);
+            }
+        }
+        return s;
+    }
+
+
+    /**
+     * Get an optional value associated with a key.
+     * @param key   A key string.
+     * @return      An object which is the value, or null if there is no value.
+     */
+    public Object opt(String key) {
+        return key == null ? null : this.myHashMap.get(key);
+    }
+
+
+    /**
+     * Get an optional boolean associated with a key.
+     * It returns false if there is no such key, or if the value is not
+     * Boolean.TRUE or the String "true".
+     *
+     * @param key   A key string.
+     * @return      The truth.
+     */
+    public boolean optBoolean(String key) {
+        return optBoolean(key, false);
+    }
+
+
+    /**
+     * Get an optional boolean associated with a key.
+     * It returns the defaultValue if there is no such key, or if it is not
+     * a Boolean or the String "true" or "false" (case insensitive).
+     *
+     * @param key              A key string.
+     * @param defaultValue     The default.
+     * @return      The truth.
+     */
+    public boolean optBoolean(String key, boolean defaultValue) {
+        try {
+            return getBoolean(key);
+        } catch (Exception e) {
+            return defaultValue;
+        }
+    }
+
+
+    /**
+     * Put a key/value pair in the JSONObject, where the value will be a
+     * JSONArray which is produced from a Collection.
+     * @param key 	A key string.
+     * @param value	A Collection value.
+     * @return		this.
+     * @throws JSONException
+     */
+    public JSONObject put(String key, Collection value) throws JSONException {
+        put(key, new JSONArray(value));
+        return this;
+    }
+
+
+    /**
+     * Get an optional double associated with a key,
+     * or NaN if there is no such key or if its value is not a number.
+     * If the value is a string, an attempt will be made to evaluate it as
+     * a number.
+     *
+     * @param key   A string which is the key.
+     * @return      An object which is the value.
+     */
+    public double optDouble(String key) {
+        return optDouble(key, Double.NaN);
+    }
+
+
+    /**
+     * Get an optional double associated with a key, or the
+     * defaultValue if there is no such key or if its value is not a number.
+     * If the value is a string, an attempt will be made to evaluate it as
+     * a number.
+     *
+     * @param key   A key string.
+     * @param defaultValue     The default.
+     * @return      An object which is the value.
+     */
+    public double optDouble(String key, double defaultValue) {
+        try {
+            Object o = opt(key);
+            return o instanceof Number ? ((Number)o).doubleValue() :
+                new Double((String)o).doubleValue();
+        } catch (Exception e) {
+            return defaultValue;
+        }
+    }
+
+
+    /**
+     * Get an optional int value associated with a key,
+     * or zero if there is no such key or if the value is not a number.
+     * If the value is a string, an attempt will be made to evaluate it as
+     * a number.
+     *
+     * @param key   A key string.
+     * @return      An object which is the value.
+     */
+    public int optInt(String key) {
+        return optInt(key, 0);
+    }
+
+
+    /**
+     * Get an optional int value associated with a key,
+     * or the default if there is no such key or if the value is not a number.
+     * If the value is a string, an attempt will be made to evaluate it as
+     * a number.
+     *
+     * @param key   A key string.
+     * @param defaultValue     The default.
+     * @return      An object which is the value.
+     */
+    public int optInt(String key, int defaultValue) {
+        try {
+            return getInt(key);
+        } catch (Exception e) {
+            return defaultValue;
+        }
+    }
+
+
+    /**
+     * Get an optional JSONArray associated with a key.
+     * It returns null if there is no such key, or if its value is not a
+     * JSONArray.
+     *
+     * @param key   A key string.
+     * @return      A JSONArray which is the value.
+     */
+    public JSONArray optJSONArray(String key) {
+        Object o = opt(key);
+        return o instanceof JSONArray ? (JSONArray)o : null;
+    }
+
+
+    /**
+     * Get an optional JSONObject associated with a key.
+     * It returns null if there is no such key, or if its value is not a
+     * JSONObject.
+     *
+     * @param key   A key string.
+     * @return      A JSONObject which is the value.
+     */
+    public JSONObject optJSONObject(String key) {
+        Object o = opt(key);
+        return o instanceof JSONObject ? (JSONObject)o : null;
+    }
+
+
+    /**
+     * Get an optional long value associated with a key,
+     * or zero if there is no such key or if the value is not a number.
+     * If the value is a string, an attempt will be made to evaluate it as
+     * a number.
+     *
+     * @param key   A key string.
+     * @return      An object which is the value.
+     */
+    public long optLong(String key) {
+        return optLong(key, 0);
+    }
+
+
+    /**
+     * Get an optional long value associated with a key,
+     * or the default if there is no such key or if the value is not a number.
+     * If the value is a string, an attempt will be made to evaluate it as
+     * a number.
+     *
+     * @param key   A key string.
+     * @param defaultValue     The default.
+     * @return      An object which is the value.
+     */
+    public long optLong(String key, long defaultValue) {
+        try {
+            return getLong(key);
+        } catch (Exception e) {
+            return defaultValue;
+        }
+    }
+
+
+    /**
+     * Get an optional string associated with a key.
+     * It returns an empty string if there is no such key. If the value is not
+     * a string and is not null, then it is coverted to a string.
+     *
+     * @param key   A key string.
+     * @return      A string which is the value.
+     */
+    public String optString(String key) {
+        return optString(key, "");
+    }
+
+
+    /**
+     * Get an optional string associated with a key.
+     * It returns the defaultValue if there is no such key.
+     *
+     * @param key   A key string.
+     * @param defaultValue     The default.
+     * @return      A string which is the value.
+     */
+    public String optString(String key, String defaultValue) {
+        Object o = opt(key);
+        return o != null ? o.toString() : defaultValue;
+    }
+
+
+    /**
+     * Put a key/boolean pair in the JSONObject.
+     *
+     * @param key   A key string.
+     * @param value A boolean which is the value.
+     * @return this.
+     * @throws JSONException If the key is null.
+     */
+    public JSONObject put(String key, boolean value) throws JSONException {
+        put(key, value ? Boolean.TRUE : Boolean.FALSE);
+        return this;
+    }
+
+
+    /**
+     * Put a key/double pair in the JSONObject.
+     *
+     * @param key   A key string.
+     * @param value A double which is the value.
+     * @return this.
+     * @throws JSONException If the key is null or if the number is invalid.
+     */
+    public JSONObject put(String key, double value) throws JSONException {
+        put(key, new Double(value));
+        return this;
+    }
+
+
+    /**
+     * Put a key/int pair in the JSONObject.
+     *
+     * @param key   A key string.
+     * @param value An int which is the value.
+     * @return this.
+     * @throws JSONException If the key is null.
+     */
+    public JSONObject put(String key, int value) throws JSONException {
+        put(key, new Integer(value));
+        return this;
+    }
+
+
+    /**
+     * Put a key/long pair in the JSONObject.
+     *
+     * @param key   A key string.
+     * @param value A long which is the value.
+     * @return this.
+     * @throws JSONException If the key is null.
+     */
+    public JSONObject put(String key, long value) throws JSONException {
+        put(key, new Long(value));
+        return this;
+    }
+
+
+    /**
+     * Put a key/value pair in the JSONObject, where the value will be a
+     * JSONObject which is produced from a Map.
+     * @param key 	A key string.
+     * @param value	A Map value.
+     * @return		this.
+     * @throws JSONException
+     */
+    public JSONObject put(String key, Map value) throws JSONException {
+        put(key, new JSONObject(value));
+        return this;
+    }
+
+
+    /**
+     * Put a key/value pair in the JSONObject. If the value is null,
+     * then the key will be removed from the JSONObject if it is present.
+     * @param key   A key string.
+     * @param value An object which is the value. It should be of one of these
+     *  types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String,
+     *  or the JSONObject.NULL object.
+     * @return this.
+     * @throws JSONException If the value is non-finite number
+     *  or if the key is null.
+     */
+    public JSONObject put(String key, Object value) throws JSONException {
+        if (key == null) {
+            throw new JSONException("Null key.");
+        }
+        if (value != null) {
+            testValidity(value);
+            this.myHashMap.put(key, value);
+        } else {
+            remove(key);
+        }
+        return this;
+    }
+
+
+    /**
+     * Put a key/value pair in the JSONObject, but only if the
+     * key and the value are both non-null.
+     * @param key   A key string.
+     * @param value An object which is the value. It should be of one of these
+     *  types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String,
+     *  or the JSONObject.NULL object.
+     * @return this.
+     * @throws JSONException If the value is a non-finite number.
+     */
+    public JSONObject putOpt(String key, Object value) throws JSONException {
+        if (key != null && value != null) {
+            put(key, value);
+        }
+        return this;
+    }
+
+
+    /**
+     * Produce a string in double quotes with backslash sequences in all the
+     * right places. A backslash will be inserted within </, allowing JSON
+     * text to be delivered in HTML. In JSON text, a string cannot contain a
+     * control character or an unescaped quote or backslash.
+     * @param string A String
+     * @return  A String correctly formatted for insertion in a JSON text.
+     */
+    public static String quote(String string) {
+        if (string == null || string.length() == 0) {
+            return "\"\"";
+        }
+
+        char         b;
+        char         c = 0;
+        int          i;
+        int          len = string.length();
+        StringBuffer sb = new StringBuffer(len + 4);
+        String       t;
+
+        sb.append('"');
+        for (i = 0; i < len; i += 1) {
+            b = c;
+            c = string.charAt(i);
+            switch (c) {
+            case '\\':
+            case '"':
+                sb.append('\\');
+                sb.append(c);
+                break;
+            case '/':
+                if (b == '<') {
+                    sb.append('\\');
+                }
+                sb.append(c);
+                break;
+            case '\b':
+                sb.append("\\b");
+                break;
+            case '\t':
+                sb.append("\\t");
+                break;
+            case '\n':
+                sb.append("\\n");
+                break;
+            case '\f':
+                sb.append("\\f");
+                break;
+            case '\r':
+                sb.append("\\r");
+                break;
+            default:
+                if (c < ' ') {
+                    t = "000" + Integer.toHexString(c);
+                    sb.append("\\u" + t.substring(t.length() - 4));
+                } else {
+                    sb.append(c);
+                }
+            }
+        }
+        sb.append('"');
+        return sb.toString();
+    }
+
+    /**
+     * Remove a name and its value, if present.
+     * @param key The name to be removed.
+     * @return The value that was associated with the name,
+     * or null if there was no value.
+     */
+    public Object remove(String key) {
+        return this.myHashMap.remove(key);
+    }
+
+
+    /**
+     * Throw an exception if the object is an NaN or infinite number.
+     * @param o The object to test.
+     * @throws JSONException If o is a non-finite number.
+     */
+    static void testValidity(Object o) throws JSONException {
+        if (o != null) {
+            if (o instanceof Double) {
+                if (((Double)o).isInfinite() || ((Double)o).isNaN()) {
+                    throw new JSONException(
+                        "JSON does not allow non-finite numbers");
+                }
+            } else if (o instanceof Float) {
+                if (((Float)o).isInfinite() || ((Float)o).isNaN()) {
+                    throw new JSONException(
+                        "JSON does not allow non-finite numbers.");
+                }
+            }
+        }
+    }
+
+
+    /**
+     * Produce a JSONArray containing the values of the members of this
+     * JSONObject.
+     * @param names A JSONArray containing a list of key strings. This
+     * determines the sequence of the values in the result.
+     * @return A JSONArray of values.
+     * @throws JSONException If any of the values are non-finite numbers.
+     */
+    public JSONArray toJSONArray(JSONArray names) throws JSONException {
+        if (names == null || names.length() == 0) {
+            return null;
+        }
+        JSONArray ja = new JSONArray();
+        for (int i = 0; i < names.length(); i += 1) {
+            ja.put(this.opt(names.getString(i)));
+        }
+        return ja;
+    }
+
+    /**
+     * Make a JSON text of this JSONObject. For compactness, no whitespace
+     * is added. If this would not result in a syntactically correct JSON text,
+     * then null will be returned instead.
+     * <p>
+     * Warning: This method assumes that the data structure is acyclical.
+     *
+     * @return a printable, displayable, portable, transmittable
+     *  representation of the object, beginning
+     *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
+     *  with <code>}</code>&nbsp;<small>(right brace)</small>.
+     */
+    public String toString() {
+        try {
+            Iterator     keys = keys();
+            StringBuffer sb = new StringBuffer("{");
+
+            while (keys.hasNext()) {
+                if (sb.length() > 1) {
+                    sb.append(',');
+                }
+                Object o = keys.next();
+                sb.append(quote(o.toString()));
+                sb.append(':');
+                sb.append(valueToString(this.myHashMap.get(o)));
+            }
+            sb.append('}');
+            return sb.toString();
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+
+    /**
+     * Make a prettyprinted JSON text of this JSONObject.
+     * <p>
+     * Warning: This method assumes that the data structure is acyclical.
+     * @param indentFactor The number of spaces to add to each level of
+     *  indentation.
+     * @return a printable, displayable, portable, transmittable
+     *  representation of the object, beginning
+     *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
+     *  with <code>}</code>&nbsp;<small>(right brace)</small>.
+     * @throws JSONException If the object contains an invalid number.
+     */
+    public String toString(int indentFactor) throws JSONException {
+        return toString(indentFactor, 0);
+    }
+
+
+    /**
+     * Make a prettyprinted JSON text of this JSONObject.
+     * <p>
+     * Warning: This method assumes that the data structure is acyclical.
+     * @param indentFactor The number of spaces to add to each level of
+     *  indentation.
+     * @param indent The indentation of the top level.
+     * @return a printable, displayable, transmittable
+     *  representation of the object, beginning
+     *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
+     *  with <code>}</code>&nbsp;<small>(right brace)</small>.
+     * @throws JSONException If the object contains an invalid number.
+     */
+    String toString(int indentFactor, int indent) throws JSONException {
+        int          i;
+        int          n = length();
+        if (n == 0) {
+            return "{}";
+        }
+        Iterator     keys = keys();
+        StringBuffer sb = new StringBuffer("{");
+        int          newindent = indent + indentFactor;
+        Object       o;
+        if (n == 1) {
+            o = keys.next();
+            sb.append(quote(o.toString()));
+            sb.append(": ");
+            sb.append(valueToString(this.myHashMap.get(o), indentFactor,
+                    indent));
+        } else {
+            while (keys.hasNext()) {
+                o = keys.next();
+                if (sb.length() > 1) {
+                    sb.append(",\n");
+                } else {
+                    sb.append('\n');
+                }
+                for (i = 0; i < newindent; i += 1) {
+                    sb.append(' ');
+                }
+                sb.append(quote(o.toString()));
+                sb.append(": ");
+                sb.append(valueToString(this.myHashMap.get(o), indentFactor,
+                        newindent));
+            }
+            if (sb.length() > 1) {
+                sb.append('\n');
+                for (i = 0; i < indent; i += 1) {
+                    sb.append(' ');
+                }
+            }
+        }
+        sb.append('}');
+        return sb.toString();
+    }
+
+
+    /**
+     * Make a JSON text of an Object value. If the object has an
+     * value.toJSONString() method, then that method will be used to produce
+     * the JSON text. The method is required to produce a strictly
+     * conforming text. If the object does not contain a toJSONString
+     * method (which is the most common case), then a text will be
+     * produced by the rules.
+     * <p>
+     * Warning: This method assumes that the data structure is acyclical.
+     * @param value The value to be serialized.
+     * @return a printable, displayable, transmittable
+     *  representation of the object, beginning
+     *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
+     *  with <code>}</code>&nbsp;<small>(right brace)</small>.
+     * @throws JSONException If the value is or contains an invalid number.
+     */
+    public static String valueToString(Object value) throws JSONException {
+        if (value == null || value.equals(null)) {
+            return "null";
+        }
+        if (value instanceof JSONString) {
+        	Object o;
+        	try {
+            	o = ((JSONString)value).toJSONString();
+            } catch (Exception e) {
+            	throw new JSONException(e);
+            }
+            if (o instanceof String) {
+	        	return (String)o;
+	        }
+            throw new JSONException("Bad value from toJSONString: " + o);
+        }
+        if (value instanceof Number) {
+            return numberToString((Number) value);
+        }
+        if (value instanceof Boolean || value instanceof JSONObject ||
+                value instanceof JSONArray) {
+            return value.toString();
+        }
+        return quote(value.toString());
+    }
+
+
+    /**
+     * Make a prettyprinted JSON text of an object value.
+     * <p>
+     * Warning: This method assumes that the data structure is acyclical.
+     * @param value The value to be serialized.
+     * @param indentFactor The number of spaces to add to each level of
+     *  indentation.
+     * @param indent The indentation of the top level.
+     * @return a printable, displayable, transmittable
+     *  representation of the object, beginning
+     *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
+     *  with <code>}</code>&nbsp;<small>(right brace)</small>.
+     * @throws JSONException If the object contains an invalid number.
+     */
+     static String valueToString(Object value, int indentFactor, int indent)
+            throws JSONException {
+        if (value == null || value.equals(null)) {
+            return "null";
+        }
+        try {
+	        if (value instanceof JSONString) {
+		        Object o = ((JSONString)value).toJSONString();
+		        if (o instanceof String) {
+		        	return (String)o;
+		        }
+	        }
+        } catch (Exception e) {
+        	/* forget about it */
+        }
+        if (value instanceof Number) {
+            return numberToString((Number) value);
+        }
+        if (value instanceof Boolean) {
+            return value.toString();
+        }
+        if (value instanceof JSONObject) {
+            return ((JSONObject)value).toString(indentFactor, indent);
+        }
+        if (value instanceof JSONArray) {
+            return ((JSONArray)value).toString(indentFactor, indent);
+        }
+        return quote(value.toString());
+    }
+
+
+     /**
+      * Write the contents of the JSONObject as JSON text to a writer.
+      * For compactness, no whitespace is added.
+      * <p>
+      * Warning: This method assumes that the data structure is acyclical.
+      *
+      * @return The writer.
+      * @throws JSONException
+      */
+     public Writer write(Writer writer) throws JSONException {
+        try {
+            boolean  b = false;
+            Iterator keys = keys();
+            writer.write('{');
+
+            while (keys.hasNext()) {
+                if (b) {
+                    writer.write(',');
+                }
+                Object k = keys.next();
+                writer.write(quote(k.toString()));
+                writer.write(':');
+                Object v = this.myHashMap.get(k);
+                if (v instanceof JSONObject) {
+                    ((JSONObject)v).write(writer);
+                } else if (v instanceof JSONArray) {
+                    ((JSONArray)v).write(writer);
+                } else {
+                    writer.write(valueToString(v));
+                }
+                b = true;
+            }
+            writer.write('}');
+            return writer;
+        } catch (IOException e) {
+            throw new JSONException(e);
+        }
+     }
+}
\ No newline at end of file

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Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONString.java
URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONString.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONString.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONString.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,42 @@
+package org.apache.sling.json;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+/**
+ * The <code>JSONString</code> interface allows a <code>toJSONString()</code>
+ * method so that a class can change the behavior of
+ * <code>JSONObject.toString()</code>, <code>JSONArray.toString()</code>,
+ * and <code>JSONWriter.value(</code>Object<code>)</code>. The
+ * <code>toJSONString</code> method will be used instead of the default behavior
+ * of using the Object's <code>toString()</code> method and quoting the result.
+ */
+public interface JSONString {
+	/**
+	 * The <code>toJSONString</code> method allows a class to produce its own JSON
+	 * serialization.
+	 *
+	 * @return A strictly syntactically correct JSON text.
+	 */
+	public String toJSONString();
+}

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Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONTokener.java
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==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONTokener.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/JSONTokener.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,460 @@
+package org.apache.sling.json;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+/**
+ * A JSONTokener takes a source string and extracts characters and tokens from
+ * it. It is used by the JSONObject and JSONArray constructors to parse
+ * JSON source strings.
+ * @author JSON.org
+ * @version 2
+ */
+public class JSONTokener {
+
+    /**
+     * The index of the next character.
+     */
+    private int myIndex;
+
+
+    /**
+     * The source string being tokenized.
+     */
+    private String mySource;
+
+
+    /**
+     * Construct a JSONTokener from a string.
+     *
+     * @param s     A source string.
+     */
+    public JSONTokener(String s) {
+        this.myIndex = 0;
+        this.mySource = s;
+    }
+
+
+    /**
+     * Back up one character. This provides a sort of lookahead capability,
+     * so that you can test for a digit or letter before attempting to parse
+     * the next number or identifier.
+     */
+    public void back() {
+        if (this.myIndex > 0) {
+            this.myIndex -= 1;
+        }
+    }
+
+
+
+    /**
+     * Get the hex value of a character (base16).
+     * @param c A character between '0' and '9' or between 'A' and 'F' or
+     * between 'a' and 'f'.
+     * @return  An int between 0 and 15, or -1 if c was not a hex digit.
+     */
+    public static int dehexchar(char c) {
+        if (c >= '0' && c <= '9') {
+            return c - '0';
+        }
+        if (c >= 'A' && c <= 'F') {
+            return c - ('A' - 10);
+        }
+        if (c >= 'a' && c <= 'f') {
+            return c - ('a' - 10);
+        }
+        return -1;
+    }
+
+
+    /**
+     * Determine if the source string still contains characters that next()
+     * can consume.
+     * @return true if not yet at the end of the source.
+     */
+    public boolean more() {
+        return this.myIndex < this.mySource.length();
+    }
+
+
+    /**
+     * Get the next character in the source string.
+     *
+     * @return The next character, or 0 if past the end of the source string.
+     */
+    public char next() {
+        if (more()) {
+            char c = this.mySource.charAt(this.myIndex);
+            this.myIndex += 1;
+            return c;
+        }
+        return 0;
+    }
+
+
+    /**
+     * Consume the next character, and check that it matches a specified
+     * character.
+     * @param c The character to match.
+     * @return The character.
+     * @throws JSONException if the character does not match.
+     */
+    public char next(char c) throws JSONException {
+        char n = next();
+        if (n != c) {
+            throw syntaxError("Expected '" + c + "' and instead saw '" +
+                    n + "'.");
+        }
+        return n;
+    }
+
+
+    /**
+     * Get the next n characters.
+     *
+     * @param n     The number of characters to take.
+     * @return      A string of n characters.
+     * @throws JSONException
+     *   Substring bounds error if there are not
+     *   n characters remaining in the source string.
+     */
+     public String next(int n) throws JSONException {
+         int i = this.myIndex;
+         int j = i + n;
+         if (j >= this.mySource.length()) {
+            throw syntaxError("Substring bounds error");
+         }
+         this.myIndex += n;
+         return this.mySource.substring(i, j);
+     }
+
+
+    /**
+     * Get the next char in the string, skipping whitespace
+     * and comments (slashslash, slashstar, and hash).
+     * @throws JSONException
+     * @return  A character, or 0 if there are no more characters.
+     */
+    public char nextClean() throws JSONException {
+        for (;;) {
+            char c = next();
+            if (c == '/') {
+                switch (next()) {
+                case '/':
+                    do {
+                        c = next();
+                    } while (c != '\n' && c != '\r' && c != 0);
+                    break;
+                case '*':
+                    for (;;) {
+                        c = next();
+                        if (c == 0) {
+                            throw syntaxError("Unclosed comment.");
+                        }
+                        if (c == '*') {
+                            if (next() == '/') {
+                                break;
+                            }
+                            back();
+                        }
+                    }
+                    break;
+                default:
+                    back();
+                    return '/';
+                }
+            } else if (c == '#') {
+                do {
+                    c = next();
+                } while (c != '\n' && c != '\r' && c != 0);
+            } else if (c == 0 || c > ' ') {
+                return c;
+            }
+        }
+    }
+
+
+    /**
+     * Return the characters up to the next close quote character.
+     * Backslash processing is done. The formal JSON format does not
+     * allow strings in single quotes, but an implementation is allowed to
+     * accept them.
+     * @param quote The quoting character, either
+     *      <code>"</code>&nbsp;<small>(double quote)</small> or
+     *      <code>'</code>&nbsp;<small>(single quote)</small>.
+     * @return      A String.
+     * @throws JSONException Unterminated string.
+     */
+    public String nextString(char quote) throws JSONException {
+        char c;
+        StringBuffer sb = new StringBuffer();
+        for (;;) {
+            c = next();
+            switch (c) {
+            case 0:
+            case '\n':
+            case '\r':
+                throw syntaxError("Unterminated string");
+            case '\\':
+                c = next();
+                switch (c) {
+                case 'b':
+                    sb.append('\b');
+                    break;
+                case 't':
+                    sb.append('\t');
+                    break;
+                case 'n':
+                    sb.append('\n');
+                    break;
+                case 'f':
+                    sb.append('\f');
+                    break;
+                case 'r':
+                    sb.append('\r');
+                    break;
+                case 'u':
+                    sb.append((char)Integer.parseInt(next(4), 16));
+                    break;
+                case 'x' :
+                    sb.append((char) Integer.parseInt(next(2), 16));
+                    break;
+                default:
+                    sb.append(c);
+                }
+                break;
+            default:
+                if (c == quote) {
+                    return sb.toString();
+                }
+                sb.append(c);
+            }
+        }
+    }
+
+
+    /**
+     * Get the text up but not including the specified character or the
+     * end of line, whichever comes first.
+     * @param  d A delimiter character.
+     * @return   A string.
+     */
+    public String nextTo(char d) {
+        StringBuffer sb = new StringBuffer();
+        for (;;) {
+            char c = next();
+            if (c == d || c == 0 || c == '\n' || c == '\r') {
+                if (c != 0) {
+                    back();
+                }
+                return sb.toString().trim();
+            }
+            sb.append(c);
+        }
+    }
+
+
+    /**
+     * Get the text up but not including one of the specified delimeter
+     * characters or the end of line, whichever comes first.
+     * @param delimiters A set of delimiter characters.
+     * @return A string, trimmed.
+     */
+    public String nextTo(String delimiters) {
+        char c;
+        StringBuffer sb = new StringBuffer();
+        for (;;) {
+            c = next();
+            if (delimiters.indexOf(c) >= 0 || c == 0 ||
+                    c == '\n' || c == '\r') {
+                if (c != 0) {
+                    back();
+                }
+                return sb.toString().trim();
+            }
+            sb.append(c);
+        }
+    }
+
+
+    /**
+     * Get the next value. The value can be a Boolean, Double, Integer,
+     * JSONArray, JSONObject, Long, or String, or the JSONObject.NULL object.
+     * @throws JSONException If syntax error.
+     *
+     * @return An object.
+     */
+    public Object nextValue() throws JSONException {
+        char c = nextClean();
+        String s;
+
+        switch (c) {
+            case '"':
+            case '\'':
+                return nextString(c);
+            case '{':
+                back();
+                return new JSONObject(this);
+            case '[':
+                back();
+                return new JSONArray(this);
+        }
+
+        /*
+         * Handle unquoted text. This could be the values true, false, or
+         * null, or it can be a number. An implementation (such as this one)
+         * is allowed to also accept non-standard forms.
+         *
+         * Accumulate characters until we reach the end of the text or a
+         * formatting character.
+         */
+
+        StringBuffer sb = new StringBuffer();
+        char b = c;
+        while (c >= ' ' && ",:]}/\\\"[{;=#".indexOf(c) < 0) {
+            sb.append(c);
+            c = next();
+        }
+        back();
+
+        /*
+         * If it is true, false, or null, return the proper value.
+         */
+
+        s = sb.toString().trim();
+        if (s.equals("")) {
+            throw syntaxError("Missing value.");
+        }
+        if (s.equalsIgnoreCase("true")) {
+            return Boolean.TRUE;
+        }
+        if (s.equalsIgnoreCase("false")) {
+            return Boolean.FALSE;
+        }
+        if (s.equalsIgnoreCase("null")) {
+            return JSONObject.NULL;
+        }
+
+        /*
+         * If it might be a number, try converting it. We support the 0- and 0x-
+         * conventions. If a number cannot be produced, then the value will just
+         * be a string. Note that the 0-, 0x-, plus, and implied string
+         * conventions are non-standard. A JSON parser is free to accept
+         * non-JSON forms as long as it accepts all correct JSON forms.
+         */
+
+        if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') {
+            if (b == '0') {
+                if (s.length() > 2 &&
+                        (s.charAt(1) == 'x' || s.charAt(1) == 'X')) {
+                    try {
+                        return new Integer(Integer.parseInt(s.substring(2),
+                                16));
+                    } catch (Exception e) {
+                        /* Ignore the error */
+                    }
+                } else {
+                    try {
+                        return new Integer(Integer.parseInt(s, 8));
+                    } catch (Exception e) {
+                        /* Ignore the error */
+                    }
+                }
+            }
+            try {
+                return new Integer(s);
+            } catch (Exception e) {
+                try {
+                    return new Long(s);
+                } catch (Exception f) {
+                    try {
+                        return new Double(s);
+                    }  catch (Exception g) {
+                        return s;
+                    }
+                }
+            }
+        }
+        return s;
+    }
+
+
+    /**
+     * Skip characters until the next character is the requested character.
+     * If the requested character is not found, no characters are skipped.
+     * @param to A character to skip to.
+     * @return The requested character, or zero if the requested character
+     * is not found.
+     */
+    public char skipTo(char to) {
+        char c;
+        int index = this.myIndex;
+        do {
+            c = next();
+            if (c == 0) {
+                this.myIndex = index;
+                return c;
+            }
+        } while (c != to);
+        back();
+        return c;
+    }
+
+
+    /**
+     * Skip characters until past the requested string.
+     * If it is not found, we are left at the end of the source.
+     * @param to A string to skip past.
+     */
+    public void skipPast(String to) {
+        this.myIndex = this.mySource.indexOf(to, this.myIndex);
+        if (this.myIndex < 0) {
+            this.myIndex = this.mySource.length();
+        } else {
+            this.myIndex += to.length();
+        }
+    }
+
+
+    /**
+     * Make a JSONException to signal a syntax error.
+     *
+     * @param message The error message.
+     * @return  A JSONException object, suitable for throwing
+     */
+    public JSONException syntaxError(String message) {
+        return new JSONException(message + toString());
+    }
+
+
+    /**
+     * Make a printable string of this JSONTokener.
+     *
+     * @return " at character [this.myIndex] of [this.mySource]"
+     */
+    public String toString() {
+        return " at character " + this.myIndex + " of " + this.mySource;
+    }
+}
\ No newline at end of file

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Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/Cookie.java
URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/Cookie.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/Cookie.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/Cookie.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,173 @@
+package org.apache.sling.json.http;
+
+import org.apache.sling.json.JSONException;
+import org.apache.sling.json.JSONObject;
+import org.apache.sling.json.JSONTokener;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+/**
+ * Convert a web browser cookie specification to a JSONObject and back.
+ * JSON and Cookies are both notations for name/value pairs.
+ * @author JSON.org
+ * @version 2
+ */
+public class Cookie {
+
+    /**
+     * Produce a copy of a string in which the characters '+', '%', '=', ';'
+     * and control characters are replaced with "%hh". This is a gentle form
+     * of URL encoding, attempting to cause as little distortion to the
+     * string as possible. The characters '=' and ';' are meta characters in
+     * cookies. By convention, they are escaped using the URL-encoding. This is
+     * only a convention, not a standard. Often, cookies are expected to have
+     * encoded values. We encode '=' and ';' because we must. We encode '%' and
+     * '+' because they are meta characters in URL encoding.
+     * @param string The source string.
+     * @return       The escaped result.
+     */
+    public static String escape(String string) {
+        char         c;
+        String       s = string.trim();
+        StringBuffer sb = new StringBuffer();
+        int          len = s.length();
+        for (int i = 0; i < len; i += 1) {
+            c = s.charAt(i);
+            if (c < ' ' || c == '+' || c == '%' || c == '=' || c == ';') {
+                sb.append('%');
+                sb.append(Character.forDigit((char)((c >>> 4) & 0x0f), 16));
+                sb.append(Character.forDigit((char)(c & 0x0f), 16));
+            } else {
+                sb.append(c);
+            }
+        }
+        return sb.toString();
+    }
+
+
+    /**
+     * Convert a cookie specification string into a JSONObject. The string
+     * will contain a name value pair separated by '='. The name and the value
+     * will be unescaped, possibly converting '+' and '%' sequences. The
+     * cookie properties may follow, separated by ';', also represented as
+     * name=value (except the secure property, which does not have a value).
+     * The name will be stored under the key "name", and the value will be
+     * stored under the key "value". This method does not do checking or
+     * validation of the parameters. It only converts the cookie string into
+     * a JSONObject.
+     * @param string The cookie specification string.
+     * @return A JSONObject containing "name", "value", and possibly other
+     *  members.
+     * @throws JSONException
+     */
+    public static JSONObject toJSONObject(String string) throws JSONException {
+        String         n;
+        JSONObject     o = new JSONObject();
+        Object         v;
+        JSONTokener x = new JSONTokener(string);
+        o.put("name", x.nextTo('='));
+        x.next('=');
+        o.put("value", x.nextTo(';'));
+        x.next();
+        while (x.more()) {
+            n = unescape(x.nextTo("=;"));
+            if (x.next() != '=') {
+                if (n.equals("secure")) {
+                    v = Boolean.TRUE;
+                } else {
+                    throw x.syntaxError("Missing '=' in cookie parameter.");
+                }
+            } else {
+                v = unescape(x.nextTo(';'));
+                x.next();
+            }
+            o.put(n, v);
+        }
+        return o;
+    }
+
+
+    /**
+     * Convert a JSONObject into a cookie specification string. The JSONObject
+     * must contain "name" and "value" members.
+     * If the JSONObject contains "expires", "domain", "path", or "secure"
+     * members, they will be appended to the cookie specification string.
+     * All other members are ignored.
+     * @param o A JSONObject
+     * @return A cookie specification string
+     * @throws JSONException
+     */
+    public static String toString(JSONObject o) throws JSONException {
+        StringBuffer sb = new StringBuffer();
+
+        sb.append(escape(o.getString("name")));
+        sb.append("=");
+        sb.append(escape(o.getString("value")));
+        if (o.has("expires")) {
+            sb.append(";expires=");
+            sb.append(o.getString("expires"));
+        }
+        if (o.has("domain")) {
+            sb.append(";domain=");
+            sb.append(escape(o.getString("domain")));
+        }
+        if (o.has("path")) {
+            sb.append(";path=");
+            sb.append(escape(o.getString("path")));
+        }
+        if (o.optBoolean("secure")) {
+            sb.append(";secure");
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Convert <code>%</code><i>hh</i> sequences to single characters, and
+     * convert plus to space.
+     * @param s A string that may contain
+     *      <code>+</code>&nbsp;<small>(plus)</small> and
+     *      <code>%</code><i>hh</i> sequences.
+     * @return The unescaped string.
+     */
+    public static String unescape(String s) {
+        int len = s.length();
+        StringBuffer b = new StringBuffer();
+        for (int i = 0; i < len; ++i) {
+            char c = s.charAt(i);
+            if (c == '+') {
+                c = ' ';
+            } else if (c == '%' && i + 2 < len) {
+                int d = JSONTokener.dehexchar(s.charAt(i + 1));
+                int e = JSONTokener.dehexchar(s.charAt(i + 2));
+                if (d >= 0 && e >= 0) {
+                    c = (char)(d * 16 + e);
+                    i += 2;
+                }
+            }
+            b.append(c);
+        }
+        return b.toString();
+    }
+}

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URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/CookieList.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/CookieList.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/CookieList.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,94 @@
+package org.apache.sling.json.http;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import java.util.Iterator;
+
+import org.apache.sling.json.JSONException;
+import org.apache.sling.json.JSONObject;
+import org.apache.sling.json.JSONTokener;
+
+/**
+ * Convert a web browser cookie list string to a JSONObject and back.
+ * @author JSON.org
+ * @version 2
+ */
+public class CookieList {
+
+    /**
+     * Convert a cookie list into a JSONObject. A cookie list is a sequence
+     * of name/value pairs. The names are separated from the values by '='.
+     * The pairs are separated by ';'. The names and the values
+     * will be unescaped, possibly converting '+' and '%' sequences.
+     *
+     * To add a cookie to a cooklist,
+     * cookielistJSONObject.put(cookieJSONObject.getString("name"),
+     *     cookieJSONObject.getString("value"));
+     * @param string  A cookie list string
+     * @return A JSONObject
+     * @throws JSONException
+     */
+    public static JSONObject toJSONObject(String string) throws JSONException {
+        JSONObject o = new JSONObject();
+        JSONTokener x = new JSONTokener(string);
+        while (x.more()) {
+            String name = Cookie.unescape(x.nextTo('='));
+            x.next('=');
+            o.put(name, Cookie.unescape(x.nextTo(';')));
+            x.next();
+        }
+        return o;
+    }
+
+
+    /**
+     * Convert a JSONObject into a cookie list. A cookie list is a sequence
+     * of name/value pairs. The names are separated from the values by '='.
+     * The pairs are separated by ';'. The characters '%', '+', '=', and ';'
+     * in the names and values are replaced by "%hh".
+     * @param o A JSONObject
+     * @return A cookie list string
+     * @throws JSONException
+     */
+    public static String toString(JSONObject o) throws JSONException {
+        boolean      b = false;
+        Iterator     keys = o.keys();
+        String       s;
+        StringBuffer sb = new StringBuffer();
+        while (keys.hasNext()) {
+            s = keys.next().toString();
+            if (!o.isNull(s)) {
+                if (b) {
+                    sb.append(';');
+                }
+                sb.append(Cookie.escape(s));
+                sb.append("=");
+                sb.append(Cookie.escape(o.getString(s)));
+                b = true;
+            }
+        }
+        return sb.toString();
+    }
+}

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Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTP.java
URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTP.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTP.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTP.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,166 @@
+package org.apache.sling.json.http;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import java.util.Iterator;
+
+import org.apache.sling.json.JSONException;
+import org.apache.sling.json.JSONObject;
+
+/**
+ * Convert an HTTP header to a JSONObject and back.
+ * @author JSON.org
+ * @version 2
+ */
+public class HTTP {
+
+    /** Carriage return/line feed. */
+    public static final String CRLF = "\r\n";
+
+    /**
+     * Convert an HTTP header string into a JSONObject. It can be a request
+     * header or a response header. A request header will contain
+     * <pre>{
+     *    Method: "POST" (for example),
+     *    "Request-URI": "/" (for example),
+     *    "HTTP-Version": "HTTP/1.1" (for example)
+     * }</pre>
+     * A response header will contain
+     * <pre>{
+     *    "HTTP-Version": "HTTP/1.1" (for example),
+     *    "Status-Code": "200" (for example),
+     *    "Reason-Phrase": "OK" (for example)
+     * }</pre>
+     * In addition, the other parameters in the header will be captured, using
+     * the HTTP field names as JSON names, so that <pre>
+     *    Date: Sun, 26 May 2002 18:06:04 GMT
+     *    Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s
+     *    Cache-Control: no-cache</pre>
+     * become
+     * <pre>{...
+     *    Date: "Sun, 26 May 2002 18:06:04 GMT",
+     *    Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s",
+     *    "Cache-Control": "no-cache",
+     * ...}</pre>
+     * It does no further checking or conversion. It does not parse dates.
+     * It does not do '%' transforms on URLs.
+     * @param string An HTTP header string.
+     * @return A JSONObject containing the elements and attributes
+     * of the XML string.
+     * @throws JSONException
+     */
+    public static JSONObject toJSONObject(String string) throws JSONException {
+        JSONObject     o = new JSONObject();
+        HTTPTokener    x = new HTTPTokener(string);
+        String         t;
+
+        t = x.nextToken();
+        if (t.toUpperCase().startsWith("HTTP")) {
+
+// Response
+
+            o.put("HTTP-Version", t);
+            o.put("Status-Code", x.nextToken());
+            o.put("Reason-Phrase", x.nextTo('\0'));
+            x.next();
+
+        } else {
+
+// Request
+
+            o.put("Method", t);
+            o.put("Request-URI", x.nextToken());
+            o.put("HTTP-Version", x.nextToken());
+        }
+
+// Fields
+
+        while (x.more()) {
+            String name = x.nextTo(':');
+            x.next(':');
+            o.put(name, x.nextTo('\0'));
+            x.next();
+        }
+        return o;
+    }
+
+
+    /**
+     * Convert a JSONObject into an HTTP header. A request header must contain
+     * <pre>{
+     *    Method: "POST" (for example),
+     *    "Request-URI": "/" (for example),
+     *    "HTTP-Version": "HTTP/1.1" (for example)
+     * }</pre>
+     * A response header must contain
+     * <pre>{
+     *    "HTTP-Version": "HTTP/1.1" (for example),
+     *    "Status-Code": "200" (for example),
+     *    "Reason-Phrase": "OK" (for example)
+     * }</pre>
+     * Any other members of the JSONObject will be output as HTTP fields.
+     * The result will end with two CRLF pairs.
+     * @param o A JSONObject
+     * @return An HTTP header string.
+     * @throws JSONException if the object does not contain enough
+     *  information.
+     */
+    public static String toString(JSONObject o) throws JSONException {
+        Iterator     keys = o.keys();
+        String       s;
+        StringBuffer sb = new StringBuffer();
+        if (o.has("Status-Code") && o.has("Reason-Phrase")) {
+            sb.append(o.getString("HTTP-Version"));
+            sb.append(' ');
+            sb.append(o.getString("Status-Code"));
+            sb.append(' ');
+            sb.append(o.getString("Reason-Phrase"));
+        } else if (o.has("Method") && o.has("Request-URI")) {
+            sb.append(o.getString("Method"));
+            sb.append(' ');
+            sb.append('"');
+            sb.append(o.getString("Request-URI"));
+            sb.append('"');
+            sb.append(' ');
+            sb.append(o.getString("HTTP-Version"));
+        } else {
+            throw new JSONException("Not enough material for an HTTP header.");
+        }
+        sb.append(CRLF);
+        while (keys.hasNext()) {
+            s = keys.next().toString();
+            if (!s.equals("HTTP-Version")      && !s.equals("Status-Code") &&
+                    !s.equals("Reason-Phrase") && !s.equals("Method") &&
+                    !s.equals("Request-URI")   && !o.isNull(s)) {
+                sb.append(s);
+                sb.append(": ");
+                sb.append(o.getString(s));
+                sb.append(CRLF);
+            }
+        }
+        sb.append(CRLF);
+        return sb.toString();
+    }
+}

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Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTPTokener.java
URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTPTokener.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTPTokener.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/http/HTTPTokener.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,80 @@
+package org.apache.sling.json.http;
+
+import org.apache.sling.json.JSONException;
+import org.apache.sling.json.JSONTokener;
+
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+/**
+ * The HTTPTokener extends the JSONTokener to provide additional methods
+ * for the parsing of HTTP headers.
+ * @author JSON.org
+ * @version 2
+ */
+public class HTTPTokener extends JSONTokener {
+
+    /**
+     * Construct an XMLTokener from a string.
+     * @param s A source string.
+     */
+    public HTTPTokener(String s) {
+        super(s);
+    }
+
+
+    /**
+     * Get the next token or string. This is used in parsing HTTP headers.
+     * @throws JSONException
+     * @return A String.
+     */
+    public String nextToken() throws JSONException {
+        char c;
+        char q;
+        StringBuffer sb = new StringBuffer();
+        do {
+            c = next();
+        } while (Character.isWhitespace(c));
+        if (c == '"' || c == '\'') {
+            q = c;
+            for (;;) {
+                c = next();
+                if (c < ' ') {
+                    throw syntaxError("Unterminated string.");
+                }
+                if (c == q) {
+                    return sb.toString();
+                }
+                sb.append(c);
+            }
+        } 
+        for (;;) {
+            if (c == 0 || Character.isWhitespace(c)) {
+                return sb.toString();
+            }
+            sb.append(c);
+            c = next();
+        }
+    }
+}

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Added: incubator/sling/trunk/json/src/main/java/org/apache/sling/json/io/JSONStringer.java
URL: http://svn.apache.org/viewvc/incubator/sling/trunk/json/src/main/java/org/apache/sling/json/io/JSONStringer.java?rev=590981&view=auto
==============================================================================
--- incubator/sling/trunk/json/src/main/java/org/apache/sling/json/io/JSONStringer.java (added)
+++ incubator/sling/trunk/json/src/main/java/org/apache/sling/json/io/JSONStringer.java Thu Nov  1 05:35:38 2007
@@ -0,0 +1,79 @@
+package org.apache.sling.json.io;
+
+/*
+Copyright (c) 2006 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import java.io.StringWriter;
+
+
+/**
+ * JSONStringer provides a quick and convenient way of producing JSON text.
+ * The texts produced strictly conform to JSON syntax rules. No whitespace is
+ * added, so the results are ready for transmission or storage. Each instance of
+ * JSONStringer can produce one JSON text.
+ * <p>
+ * A JSONStringer instance provides a <code>value</code> method for appending
+ * values to the
+ * text, and a <code>key</code>
+ * method for adding keys before values in objects. There are <code>array</code>
+ * and <code>endArray</code> methods that make and bound array values, and
+ * <code>object</code> and <code>endObject</code> methods which make and bound
+ * object values. All of these methods return the JSONWriter instance,
+ * permitting cascade style. For example, <pre>
+ * myString = new JSONStringer()
+ *     .object()
+ *         .key("JSON")
+ *         .value("Hello, World!")
+ *     .endObject()
+ *     .toString();</pre> which produces the string <pre>
+ * {"JSON":"Hello, World!"}</pre>
+ * <p>
+ * The first method called must be <code>array</code> or <code>object</code>.
+ * There are no methods for adding commas or colons. JSONStringer adds them for
+ * you. Objects and arrays can be nested up to 20 levels deep.
+ * <p>
+ * This can sometimes be easier than using a JSONObject to build a string.
+ * @author JSON.org
+ * @version 2
+ */
+public class JSONStringer extends JSONWriter {
+    /**
+     * Make a fresh JSONStringer. It can be used to build one JSON text.
+     */
+    public JSONStringer() {
+        super(new StringWriter());
+    }
+
+    /**
+     * Return the JSON text. This method is used to obtain the product of the
+     * JSONStringer instance. It will return <code>null</code> if there was a
+     * problem in the construction of the JSON text (such as the calls to
+     * <code>array</code> were not properly balanced with calls to
+     * <code>endArray</code>).
+     * @return The JSON text.
+     */
+    public String toString() {
+        return this.mode == 'd' ? this.writer.toString() : null;
+    }
+}

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