Clover coverage report - Code Coverage for tapestry release 4.0-alpha-3
Coverage timestamp: Mon May 16 2005 09:05:49 EDT
file stats: LOC: 147   Methods: 7
NCLOC: 92   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
PageRecorderImpl.java 100% 100% 100% 100%
coverage
 1   
 // Copyright 2005 The Apache Software Foundation
 2   
 //
 3   
 // Licensed under the Apache License, Version 2.0 (the "License");
 4   
 // you may not use this file except in compliance with the License.
 5   
 // You may obtain a copy of the License at
 6   
 //
 7   
 //     http://www.apache.org/licenses/LICENSE-2.0
 8   
 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
 11   
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12   
 // See the License for the specific language governing permissions and
 13   
 // limitations under the License.
 14   
 
 15   
 package org.apache.tapestry.record;
 16   
 
 17   
 import java.util.Collection;
 18   
 import java.util.Iterator;
 19   
 
 20   
 import org.apache.hivemind.ApplicationRuntimeException;
 21   
 import org.apache.hivemind.ErrorLog;
 22   
 import org.apache.hivemind.util.Defense;
 23   
 import org.apache.hivemind.util.PropertyUtils;
 24   
 import org.apache.tapestry.IComponent;
 25   
 import org.apache.tapestry.IPage;
 26   
 import org.apache.tapestry.IRequestCycle;
 27   
 import org.apache.tapestry.engine.IPageRecorder;
 28   
 import org.apache.tapestry.event.ObservedChangeEvent;
 29   
 import org.apache.tapestry.spec.IPropertySpecification;
 30   
 
 31   
 /**
 32   
  * @author Howard M. Lewis Ship
 33   
  * @since 4.0
 34   
  */
 35   
 public class PageRecorderImpl implements IPageRecorder
 36   
 {
 37   
     private String _pageName;
 38   
 
 39   
     private IRequestCycle _requestCycle;
 40   
 
 41   
     private PropertyPersistenceStrategySource _strategySource;
 42   
 
 43   
     private boolean _locked = false;
 44   
 
 45   
     private ErrorLog _log;
 46   
 
 47  219
     public PageRecorderImpl(String pageName, IRequestCycle requestCycle,
 48   
             PropertyPersistenceStrategySource strategySource, ErrorLog log)
 49   
     {
 50  219
         Defense.notNull(pageName, "pageName");
 51  219
         Defense.notNull(requestCycle, "requestCycle");
 52  219
         Defense.notNull(strategySource, "strategySource");
 53  219
         Defense.notNull(log, "log");
 54   
 
 55  219
         _pageName = pageName;
 56  219
         _requestCycle = requestCycle;
 57  219
         _strategySource = strategySource;
 58  219
         _log = log;
 59   
     }
 60   
 
 61  224
     public void commit()
 62   
     {
 63  224
         _locked = true;
 64   
     }
 65   
 
 66  215
     public Collection getChanges()
 67   
     {
 68  215
         return _strategySource.getAllStoredChanges(_pageName, _requestCycle);
 69   
     }
 70   
 
 71  214
     public void rollback(IPage page)
 72   
     {
 73  214
         Collection changes = getChanges();
 74   
 
 75  214
         Iterator i = changes.iterator();
 76   
 
 77  214
         while (i.hasNext())
 78   
         {
 79  24
             PropertyChange change = (PropertyChange) i.next();
 80   
 
 81  24
             applyChange(page, change);
 82   
         }
 83   
     }
 84   
 
 85  24
     private void applyChange(IPage page, PropertyChange change)
 86   
     {
 87  24
         String idPath = change.getComponentPath();
 88   
 
 89  24
         IComponent component = (idPath == null) ? page : page.getNestedComponent(idPath);
 90   
 
 91  24
         PropertyUtils.write(component, change.getPropertyName(), change.getNewValue());
 92   
     }
 93   
 
 94  33
     public void observeChange(ObservedChangeEvent event)
 95   
     {
 96  33
         IComponent component = event.getComponent();
 97  33
         String propertyName = event.getPropertyName();
 98   
 
 99  33
         if (_locked)
 100   
         {
 101  1
             _log.error(RecordMessages.recorderLocked(propertyName, component), null, null);
 102  1
             return;
 103   
         }
 104   
 
 105  32
         PropertyPersistenceStrategy strategy = findStrategy(component, propertyName);
 106   
 
 107  32
         if (strategy != null)
 108  31
             strategy.store(_pageName, component.getIdPath(), propertyName, event.getNewValue());
 109   
     }
 110   
 
 111   
     // package private for testing
 112   
 
 113  33
     PropertyPersistenceStrategy findStrategy(IComponent component, String propertyName)
 114   
     {
 115   
         // So much for Law of Demeter!
 116   
 
 117  33
         IPropertySpecification propertySpecification = component.getSpecification()
 118   
                 .getPropertySpecification(propertyName);
 119   
 
 120  33
         if (propertySpecification == null)
 121   
         {
 122  1
             _log.error(
 123   
                     RecordMessages.missingPropertySpecification(propertyName, component),
 124   
                     null,
 125   
                     null);
 126  1
             return null;
 127   
         }
 128   
 
 129  32
         String name = propertySpecification.getPersistence();
 130   
 
 131   
         // Should check for nulls, but the architecture of the framework pretty much
 132   
         // ensures that we won't get here unless there is a property
 133   
         // and a persistence value for the property.
 134   
 
 135  32
         try
 136   
         {
 137  32
             return _strategySource.getStrategy(name);
 138   
         }
 139   
         catch (ApplicationRuntimeException ex)
 140   
         {
 141  1
             _log.error(ex.getMessage(), propertySpecification.getLocation(), ex);
 142   
 
 143  1
             return null;
 144   
         }
 145   
     }
 146   
 
 147   
 }