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.tree.components.table; 016 017import org.apache.tapestry.IRender; 018import org.apache.tapestry.IRequestCycle; 019import org.apache.tapestry.contrib.table.model.ITableColumn; 020import org.apache.tapestry.contrib.table.model.ITableModelSource; 021import org.apache.tapestry.contrib.table.model.ITableRendererSource; 022import org.apache.tapestry.contrib.table.model.common.ComponentTableRendererSource; 023import org.apache.tapestry.util.ComponentAddress; 024 025/** 026 * @author ceco 027 */ 028public class TreeTableValueRenderSource implements ITableRendererSource 029{ 030 private static final long serialVersionUID = 3237638859391458116L; 031 032 private ComponentTableRendererSource m_objComponentRenderer; 033 private ComponentAddress m_objComponentAddress = null; 034 035 public TreeTableValueRenderSource() 036 { 037 m_objComponentRenderer = null; 038 } 039 040 public TreeTableValueRenderSource(ComponentAddress objComponentAddress) 041 { 042 m_objComponentAddress = objComponentAddress; 043 } 044 045 /** 046 * @see org.apache.tapestry.contrib.table.model.ITableRendererSource#getRenderer(IRequestCycle, ITableModelSource, ITableColumn, Object) 047 */ 048 public IRender getRenderer( 049 IRequestCycle objCycle, 050 ITableModelSource objSource, 051 ITableColumn objColumn, 052 Object objRow) 053 { 054 if (m_objComponentRenderer == null) 055 { 056 synchronized (this) 057 { 058 if (m_objComponentRenderer == null) 059 { 060 061 ComponentAddress objAddress = m_objComponentAddress; 062 if(m_objComponentAddress == null) 063 objAddress = new ComponentAddress( 064 "contrib:TreeTableNodeViewPage", 065 "treeTableNodeViewDelegator"); 066 m_objComponentRenderer = 067 new ComponentTableRendererSource(objAddress); 068 } 069 } 070 } 071 072 return m_objComponentRenderer.getRenderer( 073 objCycle, 074 objSource, 075 objColumn, 076 objRow); 077 } 078 079}