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 This model need not be used. Implementations may
021     * choose to access data via an abstraction.
022     * 
023     * @author mindbridge
024     */
025    public interface ITableDataModel
026    {
027    
028        /**
029         * Method getRowCount.
030         * 
031         * @return int the number of rows in the model
032         */
033        int getRowCount();
034    
035        /**
036         * Iterates over all of the rows in the model.
037         * 
038         * @return Iterator the iterator for access to the data
039         */
040        Iterator getRows();
041    
042        /**
043         * Method addTableDataModelListener Adds a listener that is notified when
044         * the data in the model is changed.
045         * 
046         * @param objListener
047         *            the listener to add
048         */
049        void addTableDataModelListener(ITableDataModelListener objListener);
050    
051        /**
052         * Method removeTableDataModelListener. Removes a listener that is notified
053         * when the data in the model is changed
054         * 
055         * @param objListener
056         *            the listener to remove
057         */
058        void removeTableDataModelListener(ITableDataModelListener objListener);
059    
060    }