001 /*
002 * JBoss DNA (http://www.jboss.org/dna)
003 * See the COPYRIGHT.txt file distributed with this work for information
004 * regarding copyright ownership. Some portions may be licensed
005 * to Red Hat, Inc. under one or more contributor license agreements.
006 * See the AUTHORS.txt file in the distribution for a full listing of
007 * individual contributors.
008 *
009 * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
010 * is licensed to you under the terms of the GNU Lesser General Public License as
011 * published by the Free Software Foundation; either version 2.1 of
012 * the License, or (at your option) any later version.
013 *
014 * JBoss DNA is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017 * Lesser General Public License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this software; if not, write to the Free
021 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
022 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
023 */
024 package org.jboss.dna.connector.federation.merge;
025
026 import java.util.Iterator;
027 import java.util.NoSuchElementException;
028 import net.jcip.annotations.ThreadSafe;
029 import org.jboss.dna.connector.federation.contribution.Contribution;
030
031 /**
032 * @author Randall Hauch
033 */
034 @ThreadSafe
035 public class OneContributionMergePlan extends MergePlan {
036
037 private static final long serialVersionUID = 1L;
038 private final Contribution contribution;
039
040 /**
041 * @param contribution the contribution for this merge plan
042 */
043 /*package*/OneContributionMergePlan( Contribution contribution ) {
044 assert contribution != null;
045 this.contribution = contribution;
046 }
047
048 /**
049 * {@inheritDoc}
050 *
051 * @see org.jboss.dna.connector.federation.merge.MergePlan#getContributionCount()
052 */
053 @Override
054 public int getContributionCount() {
055 return 1;
056 }
057
058 /**
059 * {@inheritDoc}
060 *
061 * @see org.jboss.dna.connector.federation.merge.MergePlan#getContributionFrom(java.lang.String)
062 */
063 @Override
064 public Contribution getContributionFrom( String sourceName ) {
065 return isSource(sourceName) ? contribution : null;
066 }
067
068 /**
069 * {@inheritDoc}
070 *
071 * @see java.lang.Iterable#iterator()
072 */
073 public Iterator<Contribution> iterator() {
074 return new Iterator<Contribution>() {
075 private boolean next = true;
076
077 public boolean hasNext() {
078 return next;
079 }
080
081 @SuppressWarnings( "synthetic-access" )
082 public Contribution next() {
083 if (next) {
084 next = false;
085 return contribution;
086 }
087 throw new NoSuchElementException();
088 }
089
090 public void remove() {
091 throw new UnsupportedOperationException();
092 }
093 };
094 }
095
096 /**
097 * {@inheritDoc}
098 *
099 * @see org.jboss.dna.connector.federation.merge.MergePlan#isSource(java.lang.String)
100 */
101 @Override
102 public boolean isSource( String sourceName ) {
103 return contribution.getSourceName().equals(sourceName);
104 }
105
106 /**
107 * {@inheritDoc}
108 *
109 * @see java.lang.Object#hashCode()
110 */
111 @Override
112 public int hashCode() {
113 return contribution.hashCode();
114 }
115
116 }