Commons Collections example source code file (TestPredicatedMap.java)

This example Commons Collections source code file (TestPredicatedMap.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

hashmap, hi, illegal, illegalargument, illegalargument, illegalargumentexception, integer, integer, map, map, predicate, predicate, string, testpredicatedmap, util

The Commons Collections TestPredicatedMap.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.map;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

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

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

/**
 * Extension of {@link TestMap} for exercising the 
 * {@link PredicatedMap} 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 TestPredicatedMap extends AbstractTestMap{
    
    protected static final Predicate truePredicate = PredicateUtils.truePredicate();
    protected static final Predicate testPredicate = new Predicate() {
        public boolean evaluate(Object o) {
            return (o instanceof String);
        }
    };
    
    
    public TestPredicatedMap(String testName) {
        super(testName);
    }
    
    public static Test suite() {
        return new TestSuite(TestPredicatedMap.class);
    }
    
    public static void main(String args[]) {
        String[] testCaseName = { TestPredicatedMap.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }

    //-----------------------------------------------------------------------
    protected Map decorateMap(Map map, Predicate keyPredicate, 
        Predicate valuePredicate) {
        return PredicatedMap.decorate(map, keyPredicate, valuePredicate);
    }
    
    public Map makeEmptyMap() {
        return decorateMap(new HashMap(), truePredicate, truePredicate);
    }
    
    public Map makeTestMap() {
        return decorateMap(new HashMap(), testPredicate, testPredicate);
    }

    //-----------------------------------------------------------------------
    public void testEntrySet() {
        Map map = makeTestMap();
        assertTrue("returned entryset should not be null",
            map.entrySet() != null);
        map = decorateMap(new HashMap(), null, null);
        map.put("oneKey", "oneValue");
        assertTrue("returned entryset should contain one entry",
            map.entrySet().size() == 1); 
        map = decorateMap(map, null, null);
    }
    
    public void testPut() {
        Map map = makeTestMap();
        try {
            map.put("Hi", new Integer(3));
            fail("Illegal value should raise IllegalArgument");
        } catch (IllegalArgumentException e) {
            // expected
        }

        try {
            map.put(new Integer(3), "Hi");
            fail("Illegal key should raise IllegalArgument");
        } catch (IllegalArgumentException e) {
            // expected
        }

        assertTrue(!map.containsKey(new Integer(3)));
        assertTrue(!map.containsValue(new Integer(3)));

        Map map2 = new HashMap();
        map2.put("A", "a");
        map2.put("B", "b");
        map2.put("C", "c");
        map2.put("c", new Integer(3));

        try {
            map.putAll(map2);
            fail("Illegal value should raise IllegalArgument");
        } catch (IllegalArgumentException e) {
            // expected
        }

        map.put("E", "e");
        Iterator iterator = map.entrySet().iterator();
        try {
            Map.Entry entry = (Map.Entry)iterator.next();
            entry.setValue(new Integer(3));
            fail("Illegal value should raise IllegalArgument");
        } catch (IllegalArgumentException e) {
            // expected
        }
        
        map.put("F", "f");
        iterator = map.entrySet().iterator();
        Map.Entry entry = (Map.Entry)iterator.next();
        entry.setValue("x");
        
    }

    public String getCompatibilityVersion() {
        return "3.1";
    }

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