FormattingLongConvertor


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  package org.apache.cocoon.woody.datatype.convertor;
17  
18  import org.outerj.i18n.DecimalFormat;
19  
20  import java.util.Locale  ;
21  import java.text.ParseException  ;
22  
23  /**
24   * A Convertor for {@link Long}s backed by the
25   * {@link java.text.DecimalFormat DecimalFormat} class.
26   *
27   * <p>This class is mostly the same as the {@link FormattingDecimalConvertor},
28   * so see there for more information.
29   *
30   * @version CVS $Id: FormattingLongConvertor.java 30932 2004-07-29 17:35:38Z vgritsenko $
31   */
32  public class FormattingLongConvertor extends FormattingDecimalConvertor {
33  
34      public FormattingLongConvertor() {
35          super();
36      }
37  
38      public Object   convertFromString(String   value, Locale   locale, Convertor.FormatCache formatCache) {
39          DecimalFormat decimalFormat = getDecimalFormat(locale, formatCache);
40          try {
41              Number   decimalValue = decimalFormat.parse(value);
42              if (decimalValue instanceof Long  )
43                  return decimalValue;
44              else
45                  return new Long  (decimalValue.longValue());
46          } catch (ParseException   e) {
47              return null;
48          }
49      }
50  
51      protected int getDefaultVariant() {
52          return INTEGER;
53      }
54  
55      public Class   getTypeClass() {
56          return Long  .class;
57      }
58  }
59
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