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From Geir Magnusson Jr. <ge...@apache.org>
Subject Re: svn commit: r155882 - geronimo/trunk/modules/kernel/src/java/org/apache/geronimo/gbean/ReferenceMap.java
Date Wed, 02 Mar 2005 13:06:33 GMT
I think the copyright year in the header should be 2005.  :)

geir

On Mar 1, 2005, at 9:50 PM, dblevins@apache.org wrote:

> Author: dblevins
> Date: Tue Mar  1 21:50:40 2005
> New Revision: 155882
>
> URL: http://svn.apache.org/viewcvs?view=rev&rev=155882
> Log:
> Handy little implementation of map that indexes instances in a  
> ReferenceCollection by a key of your choosing.
>
> Added:
>      
> geronimo/trunk/modules/kernel/src/java/org/apache/geronimo/gbean/ 
> ReferenceMap.java
>
> Added:  
> geronimo/trunk/modules/kernel/src/java/org/apache/geronimo/gbean/ 
> ReferenceMap.java
> URL:  
> http://svn.apache.org/viewcvs/geronimo/trunk/modules/kernel/src/java/ 
> org/apache/geronimo/gbean/ReferenceMap.java?view=auto&rev=155882
> ======================================================================= 
> =======
> ---  
> geronimo/trunk/modules/kernel/src/java/org/apache/geronimo/gbean/ 
> ReferenceMap.java (added)
> +++  
> geronimo/trunk/modules/kernel/src/java/org/apache/geronimo/gbean/ 
> ReferenceMap.java Tue Mar  1 21:50:40 2005
> @@ -0,0 +1,123 @@
> +/**
> + *
> + * Copyright 2003-2004 The Apache Software Foundation
> + *
> + *  Licensed 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.geronimo.gbean;
> +
> +import java.util.*;
> +
> +public class ReferenceMap implements Map, ReferenceCollectionListener  
> {
> +    private final ReferenceCollection collection;
> +    private final Map map;
> +    private final Key key;
> +
> +    /**
> +     * Constructs the ReferenceMap using a new instance of
> +     * HashMap as the internal map.
> +     *
> +     * @param collection Must be an instance of ReferenceCollection
> +     * @param map The map instance to which references will be  
> added/removed
> +     * @param key
> +     */
> +    public ReferenceMap(Collection collection, Map map, Key key) {
> +        this.collection = (ReferenceCollection) collection;
> +        this.map = map;
> +        this.key = key;
> +        for (Iterator iterator = this.collection.iterator();  
> iterator.hasNext();) {
> +            Object object = iterator.next();
> +            map.put(key.getKey(object), object);
> +        }
> +        this.collection.addReferenceCollectionListener(this);
> +    }
> +
> +    /**
> +     * Constructs the ReferenceMap using a new instance of
> +     * HashMap as the internal map.
> +     *
> +     * @param collection Must be an instance of ReferenceCollection
> +     * @param key
> +     */
> +    public ReferenceMap(Collection collection, Key key) {
> +        this(collection, new HashMap(), key);
> +    }
> +
> +    public void memberAdded(ReferenceCollectionEvent event) {
> +        map.put(key.getKey(event.getMember()), event.getMember());
> +    }
> +
> +    public void memberRemoved(ReferenceCollectionEvent event) {
> +        map.remove(key.getKey(event.getMember()));
> +    }
> +
> +    public interface Key {
> +        public Object getKey(Object object);
> +    }
> +
> +    public int size() {
> +        return map.size();
> +    }
> +
> +    public boolean isEmpty() {
> +        return map.isEmpty();
> +    }
> +
> +    public boolean containsKey(Object key) {
> +        return map.containsKey(key);
> +    }
> +
> +    public boolean containsValue(Object value) {
> +        return map.containsValue(value);
> +    }
> +
> +    public Object get(Object key) {
> +        return map.get(key);
> +    }
> +
> +    public Object put(Object key, Object value) {
> +        return map.put(key, value);
> +    }
> +
> +    public Object remove(Object key) {
> +        return map.remove(key);
> +    }
> +
> +    public void putAll(Map t) {
> +        map.putAll(t);
> +    }
> +
> +    public void clear() {
> +        map.clear();
> +    }
> +
> +    public Set keySet() {
> +        return map.keySet();
> +    }
> +
> +    public Collection values() {
> +        return map.values();
> +    }
> +
> +    public Set entrySet() {
> +        return map.entrySet();
> +    }
> +
> +    public boolean equals(Object o) {
> +        return map.equals(o);
> +    }
> +
> +    public int hashCode() {
> +        return map.hashCode();
> +    }
> +}
>
>
>
-- 
Geir Magnusson Jr                                  +1-203-665-6437
geirm@apache.org


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