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;
016    
017    import java.util.Iterator;
018    
019    /**
020     * A model of the table's data
021     * This model need not be used. Implementations may choose to
022     * access data via an abstraction.
023     * 
024     * @author mindbridge
025     */
026    public interface ITableDataModel
027    {
028            /**
029             * Method getRowCount.
030             * @return int the number of rows in the model
031             */
032            int getRowCount();
033    
034            /**
035             * Iterates over all of the rows in the model
036             * @return Iterator the iterator for access to the data
037             */
038            Iterator getRows();
039        
040            /**
041             * Method addTableDataModelListener
042         * Adds a listener that is notified when the data in the model is changed
043             * @param objListener the listener to add
044             */
045        void addTableDataModelListener(ITableDataModelListener objListener);
046    
047            /**
048             * Method removeTableDataModelListener.
049         * Removes a listener that is notified when the data in the model is changed
050             * @param objListener the listener to remove
051             */
052        void removeTableDataModelListener(ITableDataModelListener objListener);
053        
054    }