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.HashMap; 019 import java.util.Iterator; 020 import java.util.List; 021 import java.util.Map; 022 023 import org.apache.tapestry.contrib.table.model.ITableColumn; 024 import org.apache.tapestry.contrib.table.model.ITableColumnModel; 025 import org.apache.tapestry.contrib.table.model.common.ArrayIterator; 026 027 /** 028 * A minimal implementation of the 029 * {@link org.apache.tapestry.contrib.table.model.ITableColumnModel} interface 030 * that stores columns as an array. 031 * 032 * @author mindbridge 033 */ 034 public class SimpleTableColumnModel implements ITableColumnModel, Serializable 035 { 036 037 private static final long serialVersionUID = 1L; 038 039 private ITableColumn[] m_arrColumns; 040 private Map m_mapColumns; 041 042 public SimpleTableColumnModel(ITableColumn[] arrColumns) 043 { 044 m_arrColumns = arrColumns; 045 046 m_mapColumns = new HashMap(); 047 for(int i = 0; i < m_arrColumns.length; i++) 048 m_mapColumns.put(m_arrColumns[i].getColumnName(), m_arrColumns[i]); 049 } 050 051 public SimpleTableColumnModel(List arrColumns) 052 { 053 this((ITableColumn[]) arrColumns.toArray(new ITableColumn[arrColumns 054 .size()])); 055 } 056 057 public int getColumnCount() 058 { 059 return m_arrColumns.length; 060 } 061 062 public ITableColumn getColumn(int nColumn) 063 { 064 if (nColumn < 0 || nColumn >= m_arrColumns.length) 065 { 066 // error message 067 return null; 068 } 069 return m_arrColumns[nColumn]; 070 } 071 072 public ITableColumn getColumn(String strColumn) 073 { 074 return (ITableColumn) m_mapColumns.get(strColumn); 075 } 076 077 public Iterator getColumns() 078 { 079 return new ArrayIterator(m_arrColumns); 080 } 081 082 }