PrintUnits


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.NumericResult;
20  
21  import java.io.IOException  ;
22  
23  /**
24   * Print units -- encapsulation of the strings representing them, and
25   * a simpler way to deal with them.GTK type codes
26   *
27   * @author Marc Johnson (marc_johnson27591@hotmail.com)
28   * @version CVS $Id: PrintUnits.java 30932 2004-07-29 17:35:38Z vgritsenko $
29   */
30  public class PrintUnits {
31      private static final String   _cm = "cm";
32      private static final String   _in = "in";
33      private static final String   _mm = "mm";
34      private static final String   _points = "points";
35      public static final int PRINT_UNITS_CM = 0;
36      public static final int PRINT_UNITS_IN = 1;
37      public static final int PRINT_UNITS_MM = 2;
38      public static final int PRINT_UNITS_POINTS = 3;
39      private static final NumericResult _null_result =
40          new NumericResult(new IOException  ("print units cannot be null"));
41      private static final NumericResult _cm_result =
42          new NumericResult(new Integer  (PRINT_UNITS_CM));
43      private static final NumericResult _in_result =
44          new NumericResult(new Integer  (PRINT_UNITS_IN));
45      private static final NumericResult _mm_result =
46          new NumericResult(new Integer  (PRINT_UNITS_MM));
47      private static final NumericResult _points_result =
48          new NumericResult(new Integer  (PRINT_UNITS_POINTS));
49  
50      private PrintUnits() {}
51  
52      /**
53       * convert a string into a NumericResult
54       * @param value the string describing the print units
55       * @return a NumericResult containing either one of the public enumeration
56       *             values, or an appropriate IOException
57       */
58      public static NumericResult extractPrintUnits(final String   value) {
59          NumericResult rval = null;
60          String   input = (value == null) ? null : value.trim();
61  
62          if (input == null) {
63              rval = _null_result;
64          } else if (input.equalsIgnoreCase(_cm)) {
65              rval = _cm_result;
66          } else if (input.equalsIgnoreCase(_in)) {
67              rval = _in_result;
68          } else if (input.equalsIgnoreCase(_mm)) {
69              rval = _mm_result;
70          } else if (input.equalsIgnoreCase(_points)) {
71              rval = _points_result;
72          } else {
73              rval = new NumericResult(new IOException  (
74                          "\"" + input + "\" is not a valid print unit"));
75          }
76          return rval;
77      }
78  } // end public class PrintUnits
79
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