Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
URLConverter |
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1 | /* | |
2 | * Copyright 2003-2004 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.convert1.string; | |
17 | ||
18 | ||
19 | import org.apache.commons.convert1.ConversionException; | |
20 | import org.apache.commons.convert1.Converter; | |
21 | ||
22 | import java.net.URL; | |
23 | import java.net.MalformedURLException; | |
24 | ||
25 | ||
26 | ||
27 | /** | |
28 | * <p>Standard {@link Converter} implementation that converts an incoming | |
29 | * String into a <code>java.net.URL</code> object, optionally using a | |
30 | * default value or throwing a {@link ConversionException} if a conversion | |
31 | * error occurs.</p> | |
32 | * | |
33 | * @author Henri Yandell | |
34 | * @version $Id: URLConverter.java 155441 2005-02-26 13:19:22Z dirkv $ | |
35 | * @since 0.1 | |
36 | */ | |
37 | ||
38 | public final class URLConverter implements Converter { | |
39 | ||
40 | ||
41 | // ----------------------------------------------------------- Constructors | |
42 | ||
43 | ||
44 | /** | |
45 | * Create a {@link Converter} that will throw a {@link ConversionException} | |
46 | * if a conversion error occurs. | |
47 | */ | |
48 | 0 | public URLConverter() { |
49 | ||
50 | 0 | this.defaultValue = null; |
51 | 0 | this.useDefault = false; |
52 | ||
53 | 0 | } |
54 | ||
55 | ||
56 | /** | |
57 | * Create a {@link Converter} that will return the specified default value | |
58 | * if a conversion error occurs. | |
59 | * | |
60 | * @param defaultValue The default value to be returned | |
61 | */ | |
62 | 0 | public URLConverter(Object defaultValue) { |
63 | ||
64 | 0 | this.defaultValue = defaultValue; |
65 | 0 | this.useDefault = true; |
66 | ||
67 | 0 | } |
68 | ||
69 | ||
70 | // ----------------------------------------------------- Instance Variables | |
71 | ||
72 | ||
73 | /** | |
74 | * The default value specified to our Constructor, if any. | |
75 | */ | |
76 | 0 | private Object defaultValue = null; |
77 | ||
78 | ||
79 | /** | |
80 | * Should we return the default value on conversion errors? | |
81 | */ | |
82 | 0 | private boolean useDefault = true; |
83 | ||
84 | ||
85 | // --------------------------------------------------------- Public Methods | |
86 | ||
87 | ||
88 | /** | |
89 | * Convert the specified input object into an output object of the | |
90 | * specified type. | |
91 | * | |
92 | * @param type Data type to which this value should be converted | |
93 | * @param value The input value to be converted | |
94 | * | |
95 | * @exception ConversionException if conversion cannot be performed | |
96 | * successfully | |
97 | */ | |
98 | public Object convert(Class type, Object value) { | |
99 | ||
100 | 0 | if (value == null) { |
101 | 0 | if (useDefault) { |
102 | 0 | return (defaultValue); |
103 | } else { | |
104 | 0 | throw new ConversionException("No value specified"); |
105 | } | |
106 | } | |
107 | ||
108 | 0 | if (value instanceof URL) { |
109 | 0 | return (value); |
110 | } | |
111 | ||
112 | try { | |
113 | 0 | return new URL(value.toString()); |
114 | 0 | } catch(MalformedURLException murle) { |
115 | 0 | if (useDefault) { |
116 | 0 | return (defaultValue); |
117 | } else { | |
118 | 0 | throw new ConversionException(murle); |
119 | } | |
120 | } | |
121 | ||
122 | } | |
123 | ||
124 | ||
125 | } |