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1   /*
2    * Copyright 2004 Ronald Blaschke.
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.rblasch.convert.converters.primitives;
17  
18  import org.rblasch.convert.ConversionFailedException;
19  import org.rblasch.convert.converters.AbstractClassConverter;
20  
21  /***
22   * @author Ronald Blaschke
23   */
24  public class StringToBooleanConverter extends AbstractClassConverter {
25      public Class getSourceClass() {
26          return String.class;
27      }
28  
29      public Class getDestinationClass() {
30          return Boolean.class;
31      }
32  
33      public int getWeight() {
34          return 100;
35      }
36  
37      private static boolean isTrue(final String s) {
38          return "true".equalsIgnoreCase(s)
39                  || "1".equalsIgnoreCase(s);
40      }
41  
42      private static boolean isFalse(final String s) {
43          return "false".equalsIgnoreCase(s)
44                  || "0".equalsIgnoreCase(s);
45      }
46  
47      public Object convert(final Object obj) throws Exception {
48          final String s = ((String) obj).trim();
49          if (isTrue(s)) {
50              return Boolean.TRUE;
51          } else if (isFalse(s)) {
52              return Boolean.FALSE;
53          } else {
54              throw new ConversionFailedException("Can't convert '" + obj + "' to boolean");
55          }
56      }
57  }