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Commons Collections example source code file (TestCompositeMap.java)

This example Commons Collections source code file (TestCompositeMap.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

abstracttestmap, collection, compositemap, compositemap, hashmap, hashmap, illegalargumentexception, map, map, object, object, string, testcompositemap, unsupportedoperationexception, util

The Commons Collections TestCompositeMap.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 junit.framework.Test;
import junit.framework.TestSuite;
import junit.framework.Assert;

import java.util.Map;
import java.util.HashMap;
import java.util.Collection;

/**
 * Extension of {@link AbstractTestMap} for exercising the 
 * {@link CompositeMap} implementation.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 *
 * @author Brian McCallister
 */
public class TestCompositeMap extends AbstractTestMap {
    /** used as a flag in MapMutator tests */
    private boolean pass = false;
    
    public TestCompositeMap(String testName) {
        super(testName);
    }
    
    public static Test suite() {
        return new TestSuite(TestCompositeMap.class);
    }
    
    public void setUp() throws Exception {
        super.setUp();
        this.pass = false;
    }
    
    public static void main(String args[]) {
        String[] testCaseName = {TestCompositeMap.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }
    
    public Map makeEmptyMap() {
        CompositeMap map = new CompositeMap();
        map.addComposited(new HashMap());
        map.setMutator(new CompositeMap.MapMutator() {
            public void resolveCollision(CompositeMap composite,
            Map existing,
            Map added,
            Collection intersect) {
                // Do nothing
            }
            
            public Object put(CompositeMap map, Map[] composited, Object key, Object value) {
                return composited[0].put(key, value);
            }
            
            public void putAll(CompositeMap map, Map[] composited, Map t) {
                composited[0].putAll(t);
            }
            
        });
        return map;
    }
    
    private Map buildOne() {
        HashMap map = new HashMap();
        map.put("1", "one");
        map.put("2", "two");
        return map;
    }
    
    public Map buildTwo() {
        HashMap map = new HashMap();
        map.put("3", "three");
        map.put("4", "four");
        return map;
    }
    
    public void testGet() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo());
        Assert.assertEquals("one", map.get("1"));
        Assert.assertEquals("four", map.get("4"));
    }
    
    public void testAddComposited() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo());
        HashMap three = new HashMap();
        three.put("5", "five");
        map.addComposited(three);
        assertTrue(map.containsKey("5"));
        try {
            map.addComposited(three);
            fail("Expecting IllegalArgumentException.");
        } catch (IllegalArgumentException ex) {
            // expected
        }
    }
    
    public void testRemoveComposited() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo());
        HashMap three = new HashMap();
        three.put("5", "five");
        map.addComposited(three);
        assertTrue(map.containsKey("5"));
        
        map.removeComposited(three);
        assertFalse(map.containsKey("5"));
        
        map.removeComposited(buildOne());
        assertFalse(map.containsKey("2"));
        
    }
    
    public void testRemoveFromUnderlying() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo());
        HashMap three = new HashMap();
        three.put("5", "five");
        map.addComposited(three);
        assertTrue(map.containsKey("5"));
        
        //Now remove "5"
        three.remove("5");
        assertFalse(map.containsKey("5"));
    }
    
    public void testRemoveFromComposited() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo());
        HashMap three = new HashMap();
        three.put("5", "five");
        map.addComposited(three);
        assertTrue(map.containsKey("5"));
        
        //Now remove "5"
        map.remove("5");
        assertFalse(three.containsKey("5"));
    }
    
    public void testResolveCollision() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo(), 
            new CompositeMap.MapMutator() {
            public void resolveCollision(CompositeMap composite,
            Map existing,
            Map added,
            Collection intersect) {
                pass = true;
            }
            
            public Object put(CompositeMap map, Map[] composited, Object key, 
                Object value) {
                throw new UnsupportedOperationException();
            }
            
            public void putAll(CompositeMap map, Map[] composited, Map t) {
                throw new UnsupportedOperationException();
            }
        });
        
        map.addComposited(buildOne());
        assertTrue(pass);
    }
    
    public void testPut() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo(), 
            new CompositeMap.MapMutator() {
            public void resolveCollision(CompositeMap composite,
            Map existing,
            Map added,
            Collection intersect) {
                throw new UnsupportedOperationException();
            }
            
            public Object put(CompositeMap map, Map[] composited, Object key, 
                Object value) {
                pass = true;
                return "foo";
            }
            
            public void putAll(CompositeMap map, Map[] composited, Map t) {
                throw new UnsupportedOperationException();
            }
        });
        
        map.put("willy", "wonka");
        assertTrue(pass);
    }
    
    public void testPutAll() {
        CompositeMap map = new CompositeMap(buildOne(), buildTwo(), 
            new CompositeMap.MapMutator() {
            public void resolveCollision(CompositeMap composite,
            Map existing,
            Map added,
            Collection intersect) {
                throw new UnsupportedOperationException();
            }
            
            public Object put(CompositeMap map, Map[] composited, Object key,
                Object value) {
                throw new UnsupportedOperationException();
            }
            
            public void putAll(CompositeMap map, Map[] composited, Map t) {
                pass = true;
            }
        });
        
        map.putAll(null);
        assertTrue(pass);
    }
}

Other Commons Collections examples (source code examples)

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