001 /* 002 * JBoss, Home of Professional Open Source. 003 * Copyright 2008, Red Hat Middleware LLC, and individual contributors 004 * as indicated by the @author tags. See the copyright.txt file in the 005 * distribution for a full listing of individual contributors. 006 * 007 * This is free software; you can redistribute it and/or modify it 008 * under the terms of the GNU Lesser General Public License as 009 * published by the Free Software Foundation; either version 2.1 of 010 * the License, or (at your option) any later version. 011 * 012 * This software is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * You should have received a copy of the GNU Lesser General Public 018 * License along with this software; if not, write to the Free 019 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 020 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 021 */ 022 package org.jboss.dna.connector.federation.contribution; 023 024 import java.util.Iterator; 025 import java.util.LinkedList; 026 import java.util.List; 027 import net.jcip.annotations.Immutable; 028 import org.jboss.dna.graph.Location; 029 import org.jboss.dna.graph.properties.DateTime; 030 import org.jboss.dna.graph.properties.Property; 031 032 /** 033 * The contribution of a source to the information for a single federated node. 034 * 035 * @author Randall Hauch 036 */ 037 @Immutable 038 public class NodeContribution extends MultiPropertyContribution { 039 040 /** 041 * This is the first version of this class. See the documentation of MergePlan.serialVersionUID. 042 */ 043 private static final long serialVersionUID = 1L; 044 045 private List<Location> children; 046 047 /** 048 * Create a contribution of node properties and children from the source with the supplied name. 049 * 050 * @param sourceName the name of the source, which may not be null or blank 051 * @param locationInSource the location in the source for this contributed information; may not be null 052 * @param expirationTime the time (in UTC) after which this contribution should be considered expired, or null if there is no 053 * expiration time 054 * @param properties the properties from the source; may not be null 055 * @param children the children from the source; may not be null or empty 056 */ 057 public NodeContribution( String sourceName, 058 Location locationInSource, 059 DateTime expirationTime, 060 Iterable<Property> properties, 061 Iterable<Location> children ) { 062 super(sourceName, locationInSource, expirationTime, properties); 063 assert children != null; 064 this.children = new LinkedList<Location>(); 065 for (Location child : children) { 066 if (child != null) this.children.add(child); 067 } 068 assert this.children.isEmpty() == false; 069 if (ContributionStatistics.RECORD) ContributionStatistics.record(this.properties.size(), this.children.size()); 070 } 071 072 /** 073 * {@inheritDoc} 074 * 075 * @see org.jboss.dna.connector.federation.contribution.Contribution#getChildren() 076 */ 077 @Override 078 public Iterator<Location> getChildren() { 079 return new ImmutableIterator<Location>(children.iterator()); 080 } 081 082 /** 083 * {@inheritDoc} 084 * 085 * @see org.jboss.dna.connector.federation.contribution.Contribution#getChildrenCount() 086 */ 087 @Override 088 public int getChildrenCount() { 089 return children.size(); 090 } 091 }