001// Copyright 2004, 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.contrib.inspector; 016 017import java.util.ArrayList; 018import java.util.Collection; 019import java.util.List; 020 021import org.apache.hivemind.service.ClassFabUtils; 022import org.apache.tapestry.BaseComponent; 023import org.apache.tapestry.IPage; 024import org.apache.tapestry.event.PageBeginRenderListener; 025import org.apache.tapestry.event.PageEvent; 026import org.apache.tapestry.record.PropertyChange; 027import org.apache.tapestry.record.PropertyPersistenceStrategySource; 028 029/** 030 * Component of the {@link Inspector}page used to display the persisent properties of the page. 031 * 032 * @author Howard Lewis Ship 033 */ 034 035public abstract class ShowProperties extends BaseComponent implements PageBeginRenderListener 036{ 037 038 public abstract void setProperties(List properties); 039 040 public abstract PropertyChange getChange(); 041 042 /** Injected */ 043 044 public abstract PropertyPersistenceStrategySource getPropertySource(); 045 046 public void pageBeginRender(PageEvent event) 047 { 048 Inspector inspector = (Inspector) getPage(); 049 050 IPage inspectedPage = inspector.getInspectedPage(); 051 052 String pageName = inspectedPage.getPageName(); 053 054 PropertyPersistenceStrategySource source = getPropertySource(); 055 056 Collection properties = source.getAllStoredChanges(pageName); 057 058 // TODO: sorting 059 060 setProperties(new ArrayList(properties)); 061 } 062 063 /** 064 * Returns the name of the value's class, if the value is non-null. 065 */ 066 067 public String getValueClassName() 068 { 069 Object value = getChange().getNewValue(); 070 071 if (value == null) 072 return "<null>"; 073 074 return ClassFabUtils.getJavaClassName(value.getClass()); 075 } 076}