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 015package org.apache.tapestry.record; 016 017import java.util.ArrayList; 018import java.util.Collection; 019import java.util.HashMap; 020import java.util.Iterator; 021import java.util.List; 022import java.util.Map; 023 024import org.apache.hivemind.ApplicationRuntimeException; 025import org.apache.tapestry.engine.ServiceEncoding; 026 027/** 028 * Implementation of the <code>tapestry.persist.PropertyPersistenceStrategySource</code> service. 029 * Allows access to other services, that implement the 030 * {@link org.apache.tapestry.record.PropertyPersistenceStrategy} interface. 031 * 032 * @author Howard M. Lewis Ship 033 * @since 4.0 034 */ 035public class PropertyPersistenceStrategySourceImpl implements PropertyPersistenceStrategySource 036{ 037 // Set from tapestry.props.PersistenceStrategy 038 private List _contributions; 039 040 private Map _strategies = new HashMap(); 041 042 public void initializeService() 043 { 044 Iterator i = _contributions.iterator(); 045 while (i.hasNext()) 046 { 047 PropertyPersistenceStrategyContribution c = (PropertyPersistenceStrategyContribution) i 048 .next(); 049 050 _strategies.put(c.getName(), c.getStrategy()); 051 } 052 } 053 054 public PropertyPersistenceStrategy getStrategy(String name) 055 { 056 if (!_strategies.containsKey(name)) 057 throw new ApplicationRuntimeException(RecordMessages.unknownPersistenceStrategy(name)); 058 059 return (PropertyPersistenceStrategy) _strategies.get(name); 060 } 061 062 public Collection getAllStoredChanges(String pageName) 063 { 064 Collection result = new ArrayList(); 065 066 Iterator i = _strategies.values().iterator(); 067 068 while (i.hasNext()) 069 { 070 PropertyPersistenceStrategy s = (PropertyPersistenceStrategy) i.next(); 071 072 result.addAll(s.getStoredChanges(pageName)); 073 } 074 075 return result; 076 } 077 078 public void discardAllStoredChanged(String pageName) 079 { 080 Iterator i = _strategies.values().iterator(); 081 082 while (i.hasNext()) 083 { 084 PropertyPersistenceStrategy s = (PropertyPersistenceStrategy) i.next(); 085 086 s.discardStoredChanges(pageName); 087 } 088 } 089 090 public void addParametersForPersistentProperties(ServiceEncoding encoding, boolean post) 091 { 092 Iterator i = _strategies.values().iterator(); 093 094 while (i.hasNext()) 095 { 096 PropertyPersistenceStrategy s = (PropertyPersistenceStrategy) i.next(); 097 098 s.addParametersForPersistentProperties(encoding, post); 099 } 100 } 101 102 public void setContributions(List contributions) 103 { 104 _contributions = contributions; 105 } 106}