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.table.model.simple; 016 017 import java.io.Serializable; 018 import java.util.ArrayList; 019 import java.util.Arrays; 020 import java.util.Collection; 021 import java.util.Iterator; 022 import java.util.List; 023 024 import org.apache.tapestry.contrib.table.model.CTableDataModelEvent; 025 import org.apache.tapestry.contrib.table.model.common.AbstractTableDataModel; 026 import org.apache.tapestry.contrib.table.model.common.ArrayIterator; 027 028 /** 029 * A minimal list implementation of the 030 * {@link org.apache.tapestry.contrib.table.model.ITableDataModel} interface. 031 * 032 * @author mindbridge 033 */ 034 public class SimpleListTableDataModel extends AbstractTableDataModel implements 035 Serializable 036 { 037 038 private static final long serialVersionUID = 1L; 039 040 private List m_arrRows; 041 042 public SimpleListTableDataModel(Object[] arrRows) 043 { 044 this(Arrays.asList(arrRows)); 045 } 046 047 public SimpleListTableDataModel(List arrRows) 048 { 049 m_arrRows = arrRows; 050 } 051 052 public SimpleListTableDataModel(Collection arrRows) 053 { 054 m_arrRows = new ArrayList(arrRows); 055 } 056 057 public SimpleListTableDataModel(Iterator objRows) 058 { 059 m_arrRows = new ArrayList(); 060 addAll(m_arrRows, objRows); 061 } 062 063 private void addAll(List arrRows, Iterator objRows) 064 { 065 while(objRows.hasNext()) 066 arrRows.add(objRows.next()); 067 } 068 069 /** 070 * @see org.apache.tapestry.contrib.table.model.ITableDataModel#getRowCount() 071 */ 072 public int getRowCount() 073 { 074 return m_arrRows.size(); 075 } 076 077 /** 078 * Returns the row element at the given position. 079 * 080 * @param nRow 081 * the index of the element to return 082 */ 083 public Object getRow(int nRow) 084 { 085 if (nRow < 0 || nRow >= m_arrRows.size()) 086 { 087 // error message 088 return null; 089 } 090 return m_arrRows.get(nRow); 091 } 092 093 /** 094 * Returns an Iterator with the elements from the given range. 095 * 096 * @param nFrom 097 * the start of the range (inclusive) 098 * @param nTo 099 * the stop of the range (exclusive) 100 */ 101 public Iterator getRows(int nFrom, int nTo) 102 { 103 return new ArrayIterator(m_arrRows.toArray(), nFrom, nTo); 104 } 105 106 /** 107 * @see org.apache.tapestry.contrib.table.model.ITableDataModel#getRows() 108 */ 109 public Iterator getRows() 110 { 111 return m_arrRows.iterator(); 112 } 113 114 /** 115 * Method addRow. Adds a row object to the model at its end 116 * 117 * @param objRow 118 * the row object to add 119 */ 120 public void addRow(Object objRow) 121 { 122 m_arrRows.add(objRow); 123 124 CTableDataModelEvent objEvent = new CTableDataModelEvent(); 125 fireTableDataModelEvent(objEvent); 126 } 127 128 public void addRows(Collection arrRows) 129 { 130 m_arrRows.addAll(arrRows); 131 132 CTableDataModelEvent objEvent = new CTableDataModelEvent(); 133 fireTableDataModelEvent(objEvent); 134 } 135 136 /** 137 * Method removeRow. Removes a row object from the model 138 * 139 * @param objRow 140 * the row object to remove 141 */ 142 public void removeRow(Object objRow) 143 { 144 m_arrRows.remove(objRow); 145 146 CTableDataModelEvent objEvent = new CTableDataModelEvent(); 147 fireTableDataModelEvent(objEvent); 148 } 149 150 public void removeRows(Collection arrRows) 151 { 152 m_arrRows.removeAll(arrRows); 153 154 CTableDataModelEvent objEvent = new CTableDataModelEvent(); 155 fireTableDataModelEvent(objEvent); 156 } 157 158 }