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Java > Open Source Codes > org > apache > commons > betwixt > strategy > ConvertUtilsObjectStringConverter


1 /*
2  * Copyright 2001-2004 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.commons.betwixt.strategy;
17
18 import org.apache.commons.beanutils.ConvertUtils;
19 import org.apache.commons.betwixt.expression.Context;
20
21 /**
22  * String <-> object conversion strategy that delegates to ConvertUtils.
23  *
24  * @author Robert Burrell Donkin
25  * @since 0.5
26  */
27 public class ConvertUtilsObjectStringConverter extends ObjectStringConverter {
28     
29     /**
30       * Converts an object to a string representation using ConvertUtils.
31       *
32       * @param object the object to be converted, possibly null
33       * @param type the property class of the object, not null
34       * @param flavour a string allow symantic differences in formatting
35       * to be communicated (ignored)
36       * @param context not null
37       * @return a String representation, not null
38       */
39     public String JavaDoc objectToString(Object JavaDoc object, Class JavaDoc type, String JavaDoc flavour, Context context) {
40         if ( object != null ) {
41             String JavaDoc text = ConvertUtils.convert( object );
42             if ( text != null ) {
43                 return text;
44             }
45         }
46         return "";
47     }
48     
49     /**
50       * Converts an object to a string representation using ConvertUtils.
51       * This implementation ignores null and empty string values (rather than converting them).
52       *
53       * @param value the String to be converted, not null
54       * @param type the property class to be returned (if possible), not null
55       * @param flavour a string allow symantic differences in formatting
56       * to be communicated (ignored)
57       * @param context not null
58       * @return an Object converted from the String, not null
59       */
60     public Object JavaDoc stringToObject(String JavaDoc value, Class JavaDoc type, String JavaDoc flavour, Context context) {
61         if (value == null || "".equals(value))
62         {
63             return null;
64         }
65         
66         return ConvertUtils.convert( value, type );
67     }
68 }
69
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