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.contribution; 025 026 import java.util.Iterator; 027 import java.util.LinkedList; 028 import java.util.List; 029 import net.jcip.annotations.Immutable; 030 import org.jboss.dna.graph.Location; 031 import org.jboss.dna.graph.property.DateTime; 032 033 /** 034 * The contribution of a source to the information for a single federated node. 035 * 036 * @author Randall Hauch 037 */ 038 @Immutable 039 public class MultiChildContribution extends NonEmptyContribution { 040 041 /** 042 * This is the first version of this class. See the documentation of MergePlan.serialVersionUID. 043 */ 044 private static final long serialVersionUID = 1L; 045 046 private List<Location> children; 047 048 /** 049 * Create a contribution of children from the source with the supplied name. 050 * 051 * @param sourceName the name of the source, which may not be null or blank 052 * @param workspaceName the name of the workspace, which may not be null or blank 053 * @param locationInSource the location in the source for this contributed information; may not be null 054 * @param expirationTime the time (in UTC) after which this contribution should be considered expired, or null if there is no 055 * expiration time 056 * @param children the children from the source; may not be null or empty 057 */ 058 public MultiChildContribution( String sourceName, 059 String workspaceName, 060 Location locationInSource, 061 DateTime expirationTime, 062 Iterable<Location> children ) { 063 super(sourceName, workspaceName, locationInSource, expirationTime); 064 assert children != null; 065 this.children = new LinkedList<Location>(); 066 for (Location child : children) { 067 if (child != null) this.children.add(child); 068 } 069 assert this.children.isEmpty() == false; 070 if (ContributionStatistics.RECORD) ContributionStatistics.record(0, this.children.size()); 071 } 072 073 /** 074 * {@inheritDoc} 075 * 076 * @see org.jboss.dna.connector.federation.contribution.Contribution#getChildren() 077 */ 078 @Override 079 public Iterator<Location> getChildren() { 080 return new ImmutableIterator<Location>(children.iterator()); 081 } 082 083 /** 084 * {@inheritDoc} 085 * 086 * @see org.jboss.dna.connector.federation.contribution.Contribution#getChildrenCount() 087 */ 088 @Override 089 public int getChildrenCount() { 090 return children.size(); 091 } 092 }