Coverage Report - org.apache.tapestry.contrib.table.model.common.AbstractTableDataModel
 
Classes in this File Line Coverage Branch Coverage Complexity
AbstractTableDataModel
0%
0/36
0%
0/18
3.25
 
 1  
 // Copyright 2004, 2005 The Apache Software Foundation
 2  
 //
 3  
 // Licensed under the Apache License, Version 2.0 (the "License");
 4  
 // you may not use this file except in compliance with the License.
 5  
 // You may obtain a copy of the License at
 6  
 //
 7  
 //     http://www.apache.org/licenses/LICENSE-2.0
 8  
 //
 9  
 // Unless required by applicable law or agreed to in writing, software
 10  
 // distributed under the License is distributed on an "AS IS" BASIS,
 11  
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12  
 // See the License for the specific language governing permissions and
 13  
 // limitations under the License.
 14  
 
 15  
 package org.apache.tapestry.contrib.table.model.common;
 16  
 
 17  
 import java.lang.ref.WeakReference;
 18  
 import java.util.ArrayList;
 19  
 import java.util.Iterator;
 20  
 import java.util.List;
 21  
 
 22  
 import org.apache.tapestry.contrib.table.model.CTableDataModelEvent;
 23  
 import org.apache.tapestry.contrib.table.model.ITableDataModel;
 24  
 import org.apache.tapestry.contrib.table.model.ITableDataModelListener;
 25  
 
 26  
 /**
 27  
  * An implementation of the listener support in the ITableDataModel interface.
 28  
  * 
 29  
  * @author mindbridge
 30  
  */
 31  
 public abstract class AbstractTableDataModel implements ITableDataModel
 32  
 {
 33  
 
 34  
     private List m_arrListeners;
 35  
 
 36  
     public AbstractTableDataModel()
 37  0
     {
 38  0
         m_arrListeners = new ArrayList();
 39  0
     }
 40  
 
 41  
     /**
 42  
      * Method fireTableDataModelEvent. Fires a change event to all listeners.
 43  
      * 
 44  
      * @param objEvent
 45  
      *            the event to pass to the listeners
 46  
      */
 47  
     protected void fireTableDataModelEvent(CTableDataModelEvent objEvent)
 48  
     {
 49  0
         synchronized(m_arrListeners)
 50  
         {
 51  0
             List arrEmptyReferences = null;
 52  
 
 53  0
             for(Iterator it = m_arrListeners.iterator(); it.hasNext();)
 54  
             {
 55  0
                 WeakReference objRef = (WeakReference) it.next();
 56  0
                 ITableDataModelListener objListener = (ITableDataModelListener) objRef
 57  
                         .get();
 58  0
                 if (objListener != null)
 59  0
                     objListener.tableDataChanged(objEvent);
 60  
                 else
 61  
                 {
 62  0
                     if (arrEmptyReferences == null)
 63  0
                         arrEmptyReferences = new ArrayList();
 64  0
                     arrEmptyReferences.add(objRef);
 65  
                 }
 66  0
             }
 67  
 
 68  0
             if (arrEmptyReferences != null)
 69  0
                 m_arrListeners.removeAll(arrEmptyReferences);
 70  0
         }
 71  0
     }
 72  
 
 73  
     /**
 74  
      * @see org.apache.tapestry.contrib.table.model.ITableDataModel#addTableDataModelListener(ITableDataModelListener) .
 75  
      */
 76  
     public void addTableDataModelListener(ITableDataModelListener objListener)
 77  
     {
 78  0
         synchronized(m_arrListeners)
 79  
         {
 80  0
             m_arrListeners.add(new WeakReference(objListener));
 81  0
         }
 82  0
     }
 83  
 
 84  
     /**
 85  
      * @see org.apache.tapestry.contrib.table.model.ITableDataModel#removeTableDataModelListener(ITableDataModelListener) .
 86  
      */
 87  
     public void removeTableDataModelListener(ITableDataModelListener objListener)
 88  
     {
 89  0
         synchronized(m_arrListeners)
 90  
         {
 91  0
             List arrEmptyReferences = null;
 92  
 
 93  0
             for(Iterator it = m_arrListeners.iterator(); it.hasNext();)
 94  
             {
 95  0
                 WeakReference objRef = (WeakReference) it.next();
 96  0
                 ITableDataModelListener objStoredListener = (ITableDataModelListener) objRef
 97  
                         .get();
 98  0
                 if (objListener == objStoredListener
 99  
                         || objStoredListener == null)
 100  
                 {
 101  0
                     if (arrEmptyReferences == null)
 102  0
                         arrEmptyReferences = new ArrayList();
 103  0
                     arrEmptyReferences.add(objRef);
 104  
                 }
 105  0
             }
 106  
 
 107  0
             if (arrEmptyReferences != null)
 108  0
                 m_arrListeners.removeAll(arrEmptyReferences);
 109  0
         }
 110  0
     }
 111  
 
 112  
 }