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Java > Open Source Codes > org > apache > cocoon > components > elementprocessor > impl > poi > hssf > elements > EPUIData


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.cocoon.components.elementprocessor.impl.poi.hssf.elements;
18
19 import org.apache.cocoon.components.elementprocessor.types.NumericConverter;
20 import org.apache.cocoon.components.elementprocessor.types.NumericResult;
21
22 import java.io.IOException JavaDoc;
23
24 /**
25  * No-op implementation of ElementProcessor to handle the "UIData" tag
26  *
27  * This element contains no data and has an attribute, SelectedTab,
28  * that indicates which sheet is currently selected
29  *
30  * This element is not used in HSSFSerializer 1.0
31  *
32  * @author Marc Johnson (marc_johnson27591@hotmail.com)
33  * @version CVS $Id: EPUIData.java 30932 2004-07-29 17:35:38Z vgritsenko $
34  */
35 public class EPUIData extends BaseElementProcessor {
36     private NumericResult _selected_tab;
37     private static final String JavaDoc _selected_tab_attribute = "SelectedTab";
38
39     /**
40      * constructor
41      */
42     public EPUIData() {
43         super(null);
44         _selected_tab = null;
45     }
46
47     /**
48      * Get the selected tab
49      * @return the number of the currently selected sheet (tab)
50      * @exception IOException if the value is missing or incorrectly written
51      */
52     public int getSelectedTab() throws IOException JavaDoc {
53         if (_selected_tab == null) {
54             _selected_tab = NumericConverter.extractNonNegativeInteger(
55                     getValue(_selected_tab_attribute));
56         }
57         return _selected_tab.intValue();
58     }
59 } // end public class EPUIData
60
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