Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ArrayConverter |
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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.array; | |
17 | ||
18 | import java.lang.reflect.Array; | |
19 | import java.util.List; | |
20 | import java.util.Iterator; | |
21 | ||
22 | import org.apache.commons.convert1.ConversionException; | |
23 | import org.apache.commons.convert1.Converter; | |
24 | ||
25 | import org.apache.commons.convert1.ConvertRegistry; | |
26 | ||
27 | ||
28 | /** | |
29 | * <p>Standard {@link Converter} implementation that converts an incoming | |
30 | * comma delimited String into a known Java class via another Converter. | |
31 | * | |
32 | * @author Henri Yandell | |
33 | * @version $Id: ArrayConverter.java 155441 2005-02-26 13:19:22Z dirkv $ | |
34 | * @since 0.1 | |
35 | */ | |
36 | public class ArrayConverter implements Converter { | |
37 | ||
38 | private ConvertRegistry registry; | |
39 | private Converter converter; | |
40 | ||
41 | /** | |
42 | * Handles multiple types of sub-type by reusing a | |
43 | * particular registry for the sub-elements. | |
44 | */ | |
45 | 0 | public ArrayConverter(ConvertRegistry registry) { |
46 | 0 | this.registry = registry; |
47 | 0 | } |
48 | ||
49 | /** | |
50 | * Handles only one type of element converter. | |
51 | */ | |
52 | 0 | public ArrayConverter(Converter converter) { |
53 | 0 | this.converter = converter; |
54 | 0 | } |
55 | ||
56 | /** | |
57 | * Convert the specified input object into an output object of the | |
58 | * specified type. | |
59 | * | |
60 | * @param type Data type to which this value should be converted | |
61 | * @param value The input value to be converted | |
62 | * | |
63 | * @exception ConversionException if conversion cannot be performed | |
64 | * successfully | |
65 | */ | |
66 | public Object convert(Class toClass, Object value) { | |
67 | ||
68 | 0 | if (value == null) { |
69 | 0 | return null; // ignore defaults for the moment |
70 | } | |
71 | ||
72 | // parse the comma delimitation. | |
73 | //H? can we abstract this somehow? | |
74 | // An ElementProvider? | |
75 | 0 | List elements = StringArrayParser.parseElements(value.toString()); |
76 | ||
77 | // assume that toClass is an array?? | |
78 | 0 | if( toClass.isArray() ) { |
79 | 0 | toClass = toClass.getComponentType(); |
80 | } | |
81 | 0 | Object array = Array.newInstance( toClass, elements.size() ); |
82 | ||
83 | 0 | if(registry != null) { |
84 | 0 | converter = this.registry.lookup( String.class, toClass ); |
85 | } | |
86 | ||
87 | 0 | Iterator itr = elements.iterator(); |
88 | 0 | int idx = 0; |
89 | 0 | while(itr.hasNext()) { |
90 | 0 | Array.set( array, idx, converter.convert( toClass, itr.next() ) ); |
91 | 0 | idx++; |
92 | } | |
93 | ||
94 | 0 | return array; |
95 | } | |
96 | ||
97 | } |