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Commons Collections example source code file (TestPredicatedSet.java)

This example Commons Collections source code file (TestPredicatedSet.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

abstracttestset, hashset, illegalargumentexception, integer, integer, object, predicate, predicate, predicatedset, set, set, string, string, testpredicatedset, util

The Commons Collections TestPredicatedSet.java source code

 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
package org.apache.commons.collections.set;

import java.util.HashSet;
import java.util.Set;

import junit.framework.Test;
import junit.framework.TestSuite;

import org.apache.commons.collections.Predicate;
import org.apache.commons.collections.PredicateUtils;

 * Extension of {@link TestSet} for exercising the 
 * {@link PredicatedSet} implementation.
 * @since Commons Collections 3.0
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * @author Phil Steitz
public class TestPredicatedSet extends AbstractTestSet{
    public TestPredicatedSet(String testName) {
    public static Test suite() {
        return new TestSuite(TestPredicatedSet.class);
    public static void main(String args[]) {
        String[] testCaseName = { TestPredicatedSet.class.getName()};
    protected Predicate truePredicate = PredicateUtils.truePredicate();
    protected Set decorateSet(Set set, Predicate predicate) {
        return PredicatedSet.decorate(set, predicate);
    public Set makeEmptySet() {
        return decorateSet(new HashSet(), truePredicate);
    public Object[] getFullElements() {
        return new Object[] {"1", "3", "5", "7", "2", "4", "6"};
    protected Predicate testPredicate =  
        new Predicate() {
            public boolean evaluate(Object o) {
                return o instanceof String;
    protected Set makeTestSet() {
        return decorateSet(new HashSet(), testPredicate);
    public void testGetSet() {
         Set set = makeTestSet();
        assertTrue("returned set should not be null",
            ((PredicatedSet) set).getSet() != null);
    public void testIllegalAdd() {
        Set set = makeTestSet();
        Integer i = new Integer(3);
        try {
            fail("Integer should fail string predicate.");
        } catch (IllegalArgumentException e) {
            // expected
        assertTrue("Collection shouldn't contain illegal element", 

    public void testIllegalAddAll() {
        Set set = makeTestSet();
        Set elements = new HashSet();
        elements.add(new Integer(3));
        try {
            fail("Integer should fail string predicate.");
        } catch (IllegalArgumentException e) {
            // expected
        assertTrue("Set shouldn't contain illegal element", 
        assertTrue("Set shouldn't contain illegal element", 
        assertTrue("Set shouldn't contain illegal element", 
         !set.contains(new Integer(3)));   
        assertTrue("Set shouldn't contain illegal element", 

    public String getCompatibilityVersion() {
        return "3.1";

//    public void testCreate() throws Exception {
//        resetEmpty();
//        writeExternalFormToDisk((java.io.Serializable) collection, "D:/dev/collections/data/test/PredicatedSet.emptyCollection.version3.1.obj");
//        resetFull();
//        writeExternalFormToDisk((java.io.Serializable) collection, "D:/dev/collections/data/test/PredicatedSet.fullCollection.version3.1.obj");
//    }


Other Commons Collections examples (source code examples)

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my book on functional programming


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