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package org.apache.tapestry.record; |
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import java.util.Collection; |
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import java.util.Iterator; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.hivemind.ErrorLog; |
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import org.apache.hivemind.util.Defense; |
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import org.apache.hivemind.util.PropertyUtils; |
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import org.apache.tapestry.IComponent; |
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import org.apache.tapestry.IPage; |
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import org.apache.tapestry.engine.IPageRecorder; |
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import org.apache.tapestry.event.ObservedChangeEvent; |
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import org.apache.tapestry.spec.IPropertySpecification; |
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public class PageRecorderImpl implements IPageRecorder |
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{ |
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private String _pageName; |
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private PropertyPersistenceStrategySource _strategySource; |
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41 | 0 | private boolean _locked = false; |
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private ErrorLog _log; |
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public PageRecorderImpl(String pageName, PropertyPersistenceStrategySource strategySource, ErrorLog log) |
46 | 0 | { |
47 | 0 | Defense.notNull(pageName, "pageName"); |
48 | 0 | Defense.notNull(strategySource, "strategySource"); |
49 | 0 | Defense.notNull(log, "log"); |
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|
51 | 0 | _pageName = pageName; |
52 | 0 | _strategySource = strategySource; |
53 | 0 | _log = log; |
54 | 0 | } |
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public void commit() |
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{ |
58 | 0 | _locked = true; |
59 | 0 | } |
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public boolean isLocked() |
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{ |
63 | 0 | return _locked; |
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} |
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public Collection getChanges() |
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{ |
68 | 0 | return _strategySource.getAllStoredChanges(_pageName); |
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} |
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public void rollback(IPage page) |
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{ |
73 | 0 | Collection changes = getChanges(); |
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75 | 0 | Iterator i = changes.iterator(); |
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77 | 0 | while(i.hasNext()) |
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{ |
79 | 0 | PropertyChange change = (PropertyChange) i.next(); |
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81 | 0 | applyChange(page, change); |
82 | 0 | } |
83 | 0 | } |
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private void applyChange(IPage page, PropertyChange change) |
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{ |
87 | 0 | String idPath = change.getComponentPath(); |
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89 | 0 | IComponent component = (idPath == null) ? page : page.getNestedComponent(idPath); |
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91 | 0 | PropertyUtils.write(component, change.getPropertyName(), change.getNewValue()); |
92 | 0 | } |
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public void observeChange(ObservedChangeEvent event) |
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{ |
96 | 0 | IComponent component = event.getComponent(); |
97 | 0 | String propertyName = event.getPropertyName(); |
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|
99 | 0 | if (_locked) |
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{ |
101 | 0 | _log.error(RecordMessages.recorderLocked(propertyName, component), null, null); |
102 | 0 | return; |
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} |
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105 | 0 | PropertyPersistenceStrategy strategy = findStrategy(component, propertyName); |
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107 | 0 | if (strategy != null) |
108 | 0 | strategy.store(_pageName, component.getIdPath(), propertyName, event.getNewValue()); |
109 | 0 | } |
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PropertyPersistenceStrategy findStrategy(IComponent component, String propertyName) |
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{ |
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117 | 0 | IPropertySpecification propertySpecification = component.getSpecification().getPropertySpecification(propertyName); |
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119 | 0 | if (propertySpecification == null) |
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{ |
121 | 0 | _log.error(RecordMessages.missingPropertySpecification(propertyName, component), null, null); |
122 | 0 | return null; |
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} |
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125 | 0 | String name = propertySpecification.getPersistence(); |
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try |
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{ |
134 | 0 | return _strategySource.getStrategy(name); |
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} |
136 | 0 | catch (ApplicationRuntimeException ex) |
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{ |
138 | 0 | _log.error(ex.getMessage(), propertySpecification.getLocation(), ex); |
139 | 0 | return null; |
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} |
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} |
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} |