001: /*
002: * $Header: /home/cvs/jakarta-commons/primitives/src/java/org/apache/commons/collections/primitives/adapters/DoubleCollectionCollection.java,v 1.3 2003/10/16 20:49:38 scolebourne Exp $
003: * ====================================================================
004: * The Apache Software License, Version 1.1
005: *
006: * Copyright (c) 2003 The Apache Software Foundation. All rights
007: * reserved.
008: *
009: * Redistribution and use in source and binary forms, with or without
010: * modification, are permitted provided that the following conditions
011: * are met:
012: *
013: * 1. Redistributions of source code must retain the above copyright
014: * notice, this list of conditions and the following disclaimer.
015: *
016: * 2. Redistributions in binary form must reproduce the above copyright
017: * notice, this list of conditions and the following disclaimer in
018: * the documentation and/or other materials provided with the
019: * distribution.
020: *
021: * 3. The end-user documentation included with the redistribution, if
022: * any, must include the following acknowledgement:
023: * "This product includes software developed by the
024: * Apache Software Foundation (http://www.apache.org/)."
025: * Alternately, this acknowledgement may appear in the software itself,
026: * if and wherever such third-party acknowledgements normally appear.
027: *
028: * 4. The names "The Jakarta Project", "Commons", and "Apache Software
029: * Foundation" must not be used to endorse or promote products derived
030: * from this software without prior written permission. For written
031: * permission, please contact apache@apache.org.
032: *
033: * 5. Products derived from this software may not be called "Apache"
034: * nor may "Apache" appear in their names without prior written
035: * permission of the Apache Software Foundation.
036: *
037: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
038: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
039: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
040: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
041: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
042: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
043: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
044: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
045: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
046: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
047: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
048: * SUCH DAMAGE.
049: * ====================================================================
050: *
051: * This software consists of voluntary contributions made by many
052: * individuals on behalf of the Apache Software Foundation. For more
053: * information on the Apache Software Foundation, please see
054: * <http://www.apache.org/>.
055: *
056: */
057:
058: package org.apache.commons.collections.primitives.adapters;
059:
060: import java.io.Serializable;
061: import java.util.Collection;
062:
063: import org.apache.commons.collections.primitives.DoubleCollection;
064:
065: /**
066: * Adapts an {@link DoubleCollection DoubleCollection}
067: * to the {@link java.util.Collection Collection}
068: * interface.
069: * <p />
070: * This implementation delegates most methods
071: * to the provided {@link DoubleCollection DoubleCollection}
072: * implementation in the "obvious" way.
073: *
074: * @since Commons Primitives 1.0
075: * @version $Revision: 1.3 $ $Date: 2003/10/16 20:49:38 $
076: * @author Rodney Waldhoff
077: */
078: final public class DoubleCollectionCollection extends
079: AbstractDoubleCollectionCollection implements Serializable {
080:
081: /**
082: * Create a {@link Collection Collection} wrapping
083: * the specified {@link DoubleCollection DoubleCollection}. When
084: * the given <i>collection</i> is <code>null</code>,
085: * returns <code>null</code>.
086: *
087: * @param collection the (possibly <code>null</code>)
088: * {@link DoubleCollection DoubleCollection} to wrap
089: * @return a {@link Collection Collection} wrapping the given
090: * <i>collection</i>, or <code>null</code> when <i>collection</i> is
091: * <code>null</code>.
092: */
093: public static Collection wrap(DoubleCollection collection) {
094: if (null == collection) {
095: return null;
096: } else if (collection instanceof Serializable) {
097: return new DoubleCollectionCollection(collection);
098: } else {
099: return new NonSerializableDoubleCollectionCollection(
100: collection);
101: }
102: }
103:
104: /**
105: * Creates a {@link Collection Collection} wrapping
106: * the specified {@link DoubleCollection DoubleCollection}.
107: * @see #wrap
108: */
109: public DoubleCollectionCollection(DoubleCollection collection) {
110: _collection = collection;
111: }
112:
113: protected DoubleCollection getDoubleCollection() {
114: return _collection;
115: }
116:
117: private DoubleCollection _collection = null;
118: }
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