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Apache commons primitives 1.0 » org » apache » commons » collections » primitives » adapters » CollectionLongCollection.java
/*
 * $Header: /home/cvs/jakarta-commons/primitives/src/java/org/apache/commons/collections/primitives/adapters/CollectionLongCollection.java,v 1.3 2003/10/16 20:49:39 scolebourne 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.
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 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
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 * This software consists of voluntary contributions made by many
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package org.apache.commons.collections.primitives.adapters;

import java.io.Serializable;
import java.util.Collection;

import org.apache.commons.collections.primitives.LongCollection;

/**
 * Adapts a {@link java.lang.Number Number}-valued
 * {@link java.util.Collection Collection} to the
 * {@link LongCollection LongCollection} interface.
 * <p />
 * This implementation delegates most methods
 * to the provided {@link Collection Collection} 
 * implementation in the "obvious" way.
 * 
 * @since Commons Primitives 1.0
 * @version $Revision: 1.3 $ $Date: 2003/10/16 20:49:39 $
 * @author Rodney Waldhoff 
 */
final public class CollectionLongCollection extends AbstractCollectionLongCollection implements Serializable {
    /**
     * Create an {@link LongCollection LongCollection} wrapping
     * the specified {@link Collection Collection}.  When
     * the given <i>collection</i> is <code>null</code>,
     * returns <code>null</code>.
     * 
     * @param collection the (possibly <code>null</code>) {@link Collection} to wrap
     * @return an {@link LongCollection LongCollection} wrapping the given 
     *         <i>collection</i>, or <code>null</code> when <i>collection</i> is
     *         <code>null</code>.
     */
    public static LongCollection wrap(Collection collection) {
        if(null == collection) {
            return null;
        } else if(collection instanceof Serializable) {
            return new CollectionLongCollection(collection);
        } else {
            return new NonSerializableCollectionLongCollection(collection);
        }
    }

    /**
     * Creates an {@link LongCollection LongCollection} wrapping
     * the specified {@link Collection Collection}.
     * @see #wrap
     */
    public CollectionLongCollection(Collection collection) {
        _collection = collection;
    }
    
    protected Collection getCollection() {
        return _collection;
    }
 
    private Collection _collection = null;         
}
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