Source code: org/apache/hivemind/schema/rules/BooleanTranslator.java
1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.schema.rules;
16
17 import java.util.Map;
18
19 import org.apache.hivemind.ApplicationRuntimeException;
20 import org.apache.hivemind.HiveMind;
21 import org.apache.hivemind.Location;
22 import org.apache.hivemind.internal.Module;
23 import org.apache.hivemind.schema.Translator;
24
25 /**
26 * Translates a string value to a boolean value. "true" and "false" are acceptible values.
27 * Other values are logged as errors and treated as false. Null is simply considered false.
28 *
29 * @author Howard Lewis Ship
30 */
31 public class BooleanTranslator implements Translator
32 {
33 private Boolean _defaultValue = Boolean.FALSE;
34
35 public BooleanTranslator()
36 {
37 }
38
39 /**
40 * Initializes the translator, recognizing key "default" as the
41 * default value for the translator when the input is blank.
42 */
43
44 public BooleanTranslator(String initializer)
45 {
46 Map m = RuleUtils.convertInitializer(initializer);
47
48 String defaultInit = (String) m.get("default");
49
50 if (defaultInit != null)
51 _defaultValue = Boolean.valueOf(defaultInit);
52 }
53
54 public Object translate(
55 Module contributingModule,
56 Class propertyType,
57 String inputValue,
58 Location location)
59 {
60 if (HiveMind.isBlank(inputValue))
61 return _defaultValue;
62
63 if (inputValue.equals("true"))
64 return Boolean.TRUE;
65
66 if (inputValue.equals("false"))
67 return Boolean.FALSE;
68
69 throw new ApplicationRuntimeException(
70 RulesMessages.invalidBooleanValue(inputValue),
71 location,
72 null);
73 }
74
75 }