001 // Copyright 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.record; 016 017 import java.util.ArrayList; 018 import java.util.Collection; 019 import java.util.HashMap; 020 import java.util.Iterator; 021 import java.util.List; 022 import java.util.Map; 023 024 import org.apache.hivemind.ApplicationRuntimeException; 025 import org.apache.tapestry.IRequestCycle; 026 import org.apache.tapestry.engine.ServiceEncoding; 027 028 /** 029 * Implementation of the <code>tapestry.persist.PropertyPersistenceStrategySource</code> service. 030 * Allows access to other services, that implement the 031 * {@link org.apache.tapestry.record.PropertyPersistenceStrategy} interface. 032 * 033 * @author Howard M. Lewis Ship 034 * @since 4.0 035 */ 036 public class PropertyPersistenceStrategySourceImpl implements PropertyPersistenceStrategySource 037 { 038 // Set from tapestry.props.PersistenceStrategy 039 private List _contributions; 040 041 private Map _strategies = new HashMap(); 042 043 public void initializeService() 044 { 045 Iterator i = _contributions.iterator(); 046 while (i.hasNext()) 047 { 048 PropertyPersistenceStrategyContribution c = (PropertyPersistenceStrategyContribution) i 049 .next(); 050 051 _strategies.put(c.getName(), c.getStrategy()); 052 } 053 } 054 055 public PropertyPersistenceStrategy getStrategy(String name) 056 { 057 if (!_strategies.containsKey(name)) 058 throw new ApplicationRuntimeException(RecordMessages.unknownPersistenceStrategy(name)); 059 060 return (PropertyPersistenceStrategy) _strategies.get(name); 061 } 062 063 public Collection getAllStoredChanges(String pageName, IRequestCycle cycle) 064 { 065 Collection result = new ArrayList(); 066 067 Iterator i = _strategies.values().iterator(); 068 069 while (i.hasNext()) 070 { 071 PropertyPersistenceStrategy s = (PropertyPersistenceStrategy) i.next(); 072 073 result.addAll(s.getStoredChanges(pageName, cycle)); 074 } 075 076 return result; 077 } 078 079 public void discardAllStoredChanged(String pageName, IRequestCycle cycle) 080 { 081 Iterator i = _strategies.values().iterator(); 082 083 while (i.hasNext()) 084 { 085 PropertyPersistenceStrategy s = (PropertyPersistenceStrategy) i.next(); 086 087 s.discardStoredChanges(pageName, cycle); 088 } 089 } 090 091 public void addParametersForPersistentProperties(ServiceEncoding encoding, IRequestCycle cycle, boolean post) 092 { 093 Iterator i = _strategies.values().iterator(); 094 095 while (i.hasNext()) 096 { 097 PropertyPersistenceStrategy s = (PropertyPersistenceStrategy) i.next(); 098 099 s.addParametersForPersistentProperties(encoding, cycle, post); 100 } 101 } 102 103 public void setContributions(List contributions) 104 { 105 _contributions = contributions; 106 } 107 }