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 net.jcip.annotations.Immutable; 026 import org.jboss.dna.graph.Location; 027 import org.jboss.dna.graph.properties.DateTime; 028 import org.jboss.dna.graph.properties.Name; 029 import org.jboss.dna.graph.properties.Property; 030 031 /** 032 * The record of a source contributing only properties to a node. 033 * 034 * @author Randall Hauch 035 */ 036 @Immutable 037 public class OnePropertyContribution extends NonEmptyContribution { 038 039 /** 040 * This is the first version of this class. See the documentation of MergePlan.serialVersionUID. 041 */ 042 private static final long serialVersionUID = 1L; 043 044 private final Property property; 045 046 /** 047 * Create a contribution of node properties from the source with the supplied name. 048 * 049 * @param sourceName the name of the source, which may not be null or blank 050 * @param locationInSource the location in the source for this contributed information; may not be null 051 * @param expirationTime the time (in UTC) after which this contribution should be considered expired, or null if there is no 052 * expiration time 053 * @param property the property from the source; may not be null 054 */ 055 public OnePropertyContribution( String sourceName, 056 Location locationInSource, 057 DateTime expirationTime, 058 Property property ) { 059 super(sourceName, locationInSource, expirationTime); 060 assert property != null; 061 assert property.isEmpty() == false; 062 this.property = property; 063 if (ContributionStatistics.RECORD) ContributionStatistics.record(1, 0); 064 } 065 066 /** 067 * {@inheritDoc} 068 * 069 * @see org.jboss.dna.connector.federation.contribution.Contribution#getProperties() 070 */ 071 @Override 072 public Iterator<Property> getProperties() { 073 return new OneValueIterator<Property>(property); 074 } 075 076 /** 077 * {@inheritDoc} 078 * 079 * @see org.jboss.dna.connector.federation.contribution.Contribution#getPropertyCount() 080 */ 081 @Override 082 public int getPropertyCount() { 083 return 1; 084 } 085 086 /** 087 * {@inheritDoc} 088 * 089 * @see org.jboss.dna.connector.federation.contribution.Contribution#getProperty(org.jboss.dna.graph.properties.Name) 090 */ 091 @Override 092 public Property getProperty( Name name ) { 093 return this.property.getName().equals(name) ? property : null; 094 } 095 096 }