commons-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From rwaldh...@apache.org
Subject cvs commit: jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/core/composite TestCompositeUnaryFunction.java TestAll.java TestCompositeFunction.java
Date Sat, 01 Feb 2003 13:46:26 GMT
rwaldhoff    2003/02/01 05:46:26

  Modified:    functor/src/test/org/apache/commons/functor/core/composite
                        TestAll.java
  Added:       functor/src/java/org/apache/commons/functor/core/composite
                        CompositeUnaryFunction.java
               functor/src/test/org/apache/commons/functor/core/composite
                        TestCompositeUnaryFunction.java
  Removed:     functor/src/java/org/apache/commons/functor/core/composite
                        CompositeFunction.java
               functor/src/test/org/apache/commons/functor/core/composite
                        TestCompositeFunction.java
  Log:
  move CompositeFunction to CompositeUnaryFunction
  
  Revision  Changes    Path
  1.1                  jakarta-commons-sandbox/functor/src/java/org/apache/commons/functor/core/composite/CompositeUnaryFunction.java
  
  Index: CompositeUnaryFunction.java
  ===================================================================
  /* 
   * $Header: /home/cvs/jakarta-commons-sandbox/functor/src/java/org/apache/commons/functor/core/composite/CompositeUnaryFunction.java,v
1.1 2003/02/01 13:46:26 rwaldhoff Exp $
   * ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived 
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.commons.functor.core.composite;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.ListIterator;
  
  import org.apache.commons.functor.UnaryFunction;
  
  /**
   * A {@link UnaryFunction UnaryFunction} 
   * representing the composition of 
   * {@link UnaryFunction UnaryFunctions},
   * "chaining" the output of one to the input
   * of another.  For example, 
   * <pre>new CompositeUnaryFunction(f).of(g)</code>
   * {@link #evaluate evaluates} to 
   * <code>f.evaluate(g.evaluate(obj))</code>, and
   * <pre>new CompositeUnaryFunction(f).of(g).of(h)</pre>
   * {@link #evaluate evaluates} to 
   * <code>f.evaluate(g.evaluate(h.evaluate(obj)))</code>.
   * <p>
   * When the collection is empty, this function is 
   * an identity function.
   * </p>
   * <p>
   * Note that although this class implements 
   * {@link Serializable}, a given instance will
   * only be truly <code>Serializable</code> if all the
   * underlying functors are.  Attempts to serialize
   * an instance whose delegates are not all 
   * <code>Serializable</code> will result in an exception.
   * </p>
   * @version $Revision: 1.1 $ $Date: 2003/02/01 13:46:26 $
   * @author Rodney Waldhoff
   */
  public class CompositeUnaryFunction implements UnaryFunction, Serializable {
  
      // constructor
      // ------------------------------------------------------------------------
      public CompositeUnaryFunction() {
      }
  
      public CompositeUnaryFunction(UnaryFunction f) {
          of(f);
      }
  
      public CompositeUnaryFunction(UnaryFunction f, UnaryFunction g) {
          of(f);
          of(g);
      }
  
      // modifiers
      // ------------------------------------------------------------------------ 
      public CompositeUnaryFunction of(UnaryFunction f) {
          list.add(f);
          return this;
      }
   
      // predicate interface
      // ------------------------------------------------------------------------
      public Object evaluate(Object obj) {        
          Object result = obj;
          for(ListIterator iter = list.listIterator(list.size()); iter.hasPrevious();) {
              result = ((UnaryFunction)iter.previous()).evaluate(result);
          }
          return result;
      }
  
      public boolean equals(Object that) {
          if(that instanceof CompositeUnaryFunction) {
              return equals((CompositeUnaryFunction)that);
          } else {
              return false;
          }
      }
      
      public boolean equals(CompositeUnaryFunction that) {
          // by construction, list is never null
          return null != that && list.equals(that.list);
      }
      
      public int hashCode() {
          // by construction, list is never null
          return "CompositeUnaryFunction".hashCode() ^ list.hashCode();
      }
      
      public String toString() {
          return "CompositeUnaryFunction<" + list + ">";
      }
      
      
      // attributes
      // ------------------------------------------------------------------------
      private List list = new ArrayList();
  
  }
  
  
  
  1.2       +3 -3      jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/core/composite/TestAll.java
  
  Index: TestAll.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/core/composite/TestAll.java,v
  retrieving revision 1.1
  retrieving revision 1.2
  diff -u -r1.1 -r1.2
  --- TestAll.java	27 Jan 2003 19:33:43 -0000	1.1
  +++ TestAll.java	1 Feb 2003 13:46:26 -0000	1.2
  @@ -88,7 +88,7 @@
           suite.addTest(TestUnaryProcedureSequence.suite());
           suite.addTest(TestBinaryProcedureSequence.suite());
   
  -        suite.addTest(TestCompositeFunction.suite());
  +        suite.addTest(TestCompositeUnaryFunction.suite());
   
           suite.addTest(TestTransposedFunction.suite());
           suite.addTest(TestTransposedPredicate.suite());
  
  
  
  1.1                  jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/core/composite/TestCompositeUnaryFunction.java
  
  Index: TestCompositeUnaryFunction.java
  ===================================================================
  /* 
   * $Header: /home/cvs/jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/core/composite/TestCompositeUnaryFunction.java,v
1.1 2003/02/01 13:46:26 rwaldhoff Exp $
   * ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived 
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.commons.functor.core.composite;
  
  import junit.framework.Test;
  import junit.framework.TestSuite;
  
  import org.apache.commons.functor.BaseFunctorTest;
  import org.apache.commons.functor.UnaryFunction;
  import org.apache.commons.functor.core.ConstantFunction;
  import org.apache.commons.functor.core.IdentityFunction;
  
  /**
   * @version $Revision: 1.1 $ $Date: 2003/02/01 13:46:26 $
   * @author Rodney Waldhoff
   */
  public class TestCompositeUnaryFunction extends BaseFunctorTest {
  
      // Conventional
      // ------------------------------------------------------------------------
  
      public TestCompositeUnaryFunction(String testName) {
          super(testName);
      }
  
      public static Test suite() {
          return new TestSuite(TestCompositeUnaryFunction.class);
      }
  
      // Functor Testing Framework
      // ------------------------------------------------------------------------
  
      protected Object makeFunctor() {
          return new CompositeUnaryFunction(new IdentityFunction(),new ConstantFunction(new
Integer(3)));
      }
  
      // Lifecycle
      // ------------------------------------------------------------------------
  
      public void setUp() throws Exception {
          super.setUp();
      }
  
      public void tearDown() throws Exception {
          super.tearDown();
      }
  
      // Tests
      // ------------------------------------------------------------------------
      
      public void testEvaluate() throws Exception {
          // empty composite acts like identity function
          assertEquals("xyzzy",(new CompositeUnaryFunction()).evaluate("xyzzy"));
          assertNull(null,(new CompositeUnaryFunction()).evaluate(null));
  
          assertEquals(new Integer(4),(new CompositeUnaryFunction(new ConstantFunction(new
Integer(4)))).evaluate(null));
          
          assertEquals(new Integer(4),(new CompositeUnaryFunction(new ConstantFunction(new
Integer(4)),new ConstantFunction(new Integer(3)))).evaluate("xyzzy"));
          assertEquals(new Integer(3),(new CompositeUnaryFunction(new ConstantFunction(new
Integer(3)),new ConstantFunction(new Integer(4)))).evaluate("xyzzy"));
      }
      
      public void testOf() throws Exception {
          CompositeUnaryFunction f = new CompositeUnaryFunction();
          assertNull(f.evaluate(null));
          for(int i=0;i<10;i++) {
              f.of(new UnaryFunction() {
                      public Object evaluate(Object obj) {
                          if(obj instanceof Integer) {
                              return new Integer((((Integer)obj).intValue())+1);
                          } else { 
                              return new Integer(1);
                          }
                      }
                  });
              assertEquals(new Integer(i+1),f.evaluate(null));
          }
      }
      
      public void testEquals() throws Exception {
          CompositeUnaryFunction f = new CompositeUnaryFunction();
          assertEquals(f,f);
          CompositeUnaryFunction g = new CompositeUnaryFunction();
          assertObjectsAreEqual(f,g);
  
          for(int i=0;i<3;i++) {
              f.of(new ConstantFunction("x"));
              assertObjectsAreNotEqual(f,g);
              g.of(new ConstantFunction("x"));
              assertObjectsAreEqual(f,g);
              f.of(new CompositeUnaryFunction(new ConstantFunction("y"),new ConstantFunction("z")));
              assertObjectsAreNotEqual(f,g);            
              g.of(new CompositeUnaryFunction(new ConstantFunction("y"),new ConstantFunction("z")));
              assertObjectsAreEqual(f,g);            
          }
                  
          assertObjectsAreNotEqual(f,new ConstantFunction("y"));
      }
  
  }
  
  
  

---------------------------------------------------------------------
To unsubscribe, e-mail: commons-dev-unsubscribe@jakarta.apache.org
For additional commands, e-mail: commons-dev-help@jakarta.apache.org


Mime
View raw message