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


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 "top" tag
26  *
27  * This element has two attributes: Points and PrefUnit
28  *
29  * @author Marc Johnson (marc_johnson27591@hotmail.com)
30  * @version CVS $Id: EP_Top.java 37191 2004-08-30 10:15:06Z antonio $
31  */
32 public class EP_Top extends BaseElementProcessor {
33     private static final String JavaDoc _points_attribute = "Points";
34     private static final String JavaDoc _pref_unit_attribute = "PrefUnit";
35     private NumericResult _points;
36     private NumericResult _pref_unit;
37
38     /**
39      * constructor
40      */
41     public EP_Top() {
42         super(null);
43         _points = null;
44         _pref_unit = null;
45     }
46
47     /**
48      * @return points
49      *
50      * @exception IOException
51      */
52     double getPoints() throws IOException JavaDoc {
53         if (_points == null) {
54             _points = NumericConverter.extractDouble(getValue(_points_attribute));
55         }
56         return _points.doubleValue();
57     }
58
59     /**
60      * @return print unit (always one of the values in PrintUnits)
61      *
62      * @exception IOException
63      */
64
65     int getPrefUnit() throws IOException JavaDoc {
66         if (_pref_unit == null) {
67             _pref_unit = PrintUnits.extractPrintUnits(getValue(_pref_unit_attribute));
68         }
69         return _pref_unit.intValue();
70     }
71
72     /**
73      * Setup the top margin
74      * @exception IOException
75      */
76     public void endProcessing() throws IOException JavaDoc{
77         this.getSheet().setTopMargin(getPoints());
78     }
79 } // end public class EP_Top
80
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