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. 014 015 package org.apache.tapestry.contrib.tree.components.table; 016 017 import org.apache.tapestry.IRender; 018 import org.apache.tapestry.IRequestCycle; 019 import org.apache.tapestry.contrib.table.model.ITableColumn; 020 import org.apache.tapestry.contrib.table.model.ITableModelSource; 021 import org.apache.tapestry.contrib.table.model.ITableRendererSource; 022 import org.apache.tapestry.contrib.table.model.common.ComponentTableRendererSource; 023 import org.apache.tapestry.util.ComponentAddress; 024 025 /** 026 * @author ceco 027 */ 028 public 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 }