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Java > Open Source Codes > org > apache > tapestry > contrib > table > components > AbstractTableRowComponent


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.contrib.table.components;
16
17 import org.apache.hivemind.ApplicationRuntimeException;
18 import org.apache.tapestry.IRequestCycle;
19 import org.apache.tapestry.contrib.table.model.ITableRowSource;
20
21 /**
22  * The base implementation for a component that is wrapped by
23  * the TableRows component. Provides a utility method for getting
24  * a pointer to TableRows.
25  *
26  * @author mindbridge
27  */
28 public abstract class AbstractTableRowComponent extends AbstractTableViewComponent
29 {
30     public ITableRowSource getTableRowSource()
31     {
32         IRequestCycle objCycle = getPage().getRequestCycle();
33
34         Object JavaDoc objSourceObj = objCycle.getAttribute(ITableRowSource.TABLE_ROW_SOURCE_ATTRIBUTE);
35         ITableRowSource objSource = (ITableRowSource) objSourceObj;
36
37         if (objSource == null)
38             throw new ApplicationRuntimeException(
39                 "The component "
40                     + getId()
41                     + " must be contained within an ITableRowSource component, such as TableRows",
42                 this,
43                 null,
44                 null);
45
46         return objSource;
47     }
48
49 }
50
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