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 015package org.apache.tapestry.contrib.table.components; 016 017import org.apache.hivemind.ApplicationRuntimeException; 018import org.apache.tapestry.IRequestCycle; 019import org.apache.tapestry.contrib.table.model.ITableRowSource; 020 021/** 022 * The base implementation for a component that is wrapped by 023 * the TableRows component. Provides a utility method for getting 024 * a pointer to TableRows. 025 * 026 * @author mindbridge 027 */ 028public abstract class AbstractTableRowComponent extends AbstractTableViewComponent 029{ 030 public ITableRowSource getTableRowSource() 031 { 032 IRequestCycle objCycle = getPage().getRequestCycle(); 033 034 Object objSourceObj = objCycle.getAttribute(ITableRowSource.TABLE_ROW_SOURCE_ATTRIBUTE); 035 ITableRowSource objSource = (ITableRowSource) objSourceObj; 036 037 if (objSource == null) 038 throw new ApplicationRuntimeException( 039 "The component " 040 + getId() 041 + " must be contained within an ITableRowSource component, such as TableRows", 042 this, 043 null, 044 null); 045 046 return objSource; 047 } 048 049}