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.io.Serializable;
018    
019    import org.apache.tapestry.IRender;
020    import org.apache.tapestry.IRequestCycle;
021    
022    /**
023     * This interface provides a renderer to present the data in a table column. It
024     * is usually used by the
025     * {@link org.apache.tapestry.contrib.table.model.ITableColumn} implementations
026     * via aggregation.
027     * 
028     * @see org.apache.tapestry.contrib.table.model.common.AbstractTableColumn
029     * @author mindbridge
030     * @since 2.3
031     */
032    public interface ITableRendererSource extends Serializable
033    {
034    
035        /**
036         * Returns a renderer to present the data of the row in the given column.
037         * <p>
038         * This method can also be used to return a renderer to present the heading
039         * of the column. In such a case the row passed would be null.
040         * 
041         * @see org.apache.tapestry.contrib.table.model.ITableColumn#getValueRenderer(IRequestCycle,
042         *      ITableModelSource, Object)
043         */
044        IRender getRenderer(IRequestCycle objCycle,
045                ITableModelSource objSource, ITableColumn objColumn, Object objRow);
046    
047    }