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    }