Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
GenericMethodParameterTypeFactory |
|
| 7.5;7.5 |
1 | package org.apache.commons.ognl.internal.entry; | |
2 | ||
3 | /* | |
4 | * Licensed to the Apache Software Foundation (ASF) under one | |
5 | * or more contributor license agreements. See the NOTICE file | |
6 | * distributed with this work for additional information | |
7 | * regarding copyright ownership. The ASF licenses this file | |
8 | * to you under the Apache License, Version 2.0 (the | |
9 | * "License"); you may not use this file except in compliance | |
10 | * with the License. You may obtain a copy of the License at | |
11 | * | |
12 | * http://www.apache.org/licenses/LICENSE-2.0 | |
13 | * | |
14 | * Unless required by applicable law or agreed to in writing, | |
15 | * software distributed under the License is distributed on an | |
16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
17 | * KIND, either express or implied. See the License for the | |
18 | * specific language governing permissions and limitations | |
19 | * under the License. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * $Id: GenericMethodParameterTypeFactory.java 1194956 2011-10-29 18:02:14Z mcucchiara $ | |
24 | */ | |
25 | ||
26 | import org.apache.commons.ognl.internal.CacheException; | |
27 | ||
28 | import java.lang.reflect.Array; | |
29 | import java.lang.reflect.GenericArrayType; | |
30 | import java.lang.reflect.ParameterizedType; | |
31 | import java.lang.reflect.Type; | |
32 | import java.lang.reflect.TypeVariable; | |
33 | ||
34 | 23 | public class GenericMethodParameterTypeFactory |
35 | implements CacheEntryFactory<GenericMethodParameterTypeCacheEntry, Class<?>[]> | |
36 | { | |
37 | public Class<?>[] create( GenericMethodParameterTypeCacheEntry entry ) | |
38 | throws CacheException | |
39 | { | |
40 | Class<?>[] types; | |
41 | ||
42 | 21 | ParameterizedType param = (ParameterizedType) entry.type.getGenericSuperclass(); |
43 | 21 | Type[] genTypes = entry.method.getGenericParameterTypes(); |
44 | 21 | TypeVariable<?>[] declaredTypes = entry.method.getDeclaringClass().getTypeParameters(); |
45 | ||
46 | 21 | types = new Class[genTypes.length]; |
47 | ||
48 | 33 | for ( int i = 0; i < genTypes.length; i++ ) |
49 | { | |
50 | 12 | TypeVariable<?> paramType = null; |
51 | ||
52 | 12 | if ( TypeVariable.class.isInstance( genTypes[i] ) ) |
53 | { | |
54 | 6 | paramType = (TypeVariable<?>) genTypes[i]; |
55 | } | |
56 | 6 | else if ( GenericArrayType.class.isInstance( genTypes[i] ) ) |
57 | { | |
58 | 4 | paramType = (TypeVariable<?>) ( (GenericArrayType) genTypes[i] ).getGenericComponentType(); |
59 | } | |
60 | 2 | else if ( ParameterizedType.class.isInstance( genTypes[i] ) ) |
61 | { | |
62 | 0 | types[i] = (Class<?>) ( (ParameterizedType) genTypes[i] ).getRawType(); |
63 | 0 | continue; |
64 | } | |
65 | 2 | else if ( Class.class.isInstance( genTypes[i] ) ) |
66 | { | |
67 | 2 | types[i] = (Class<?>) genTypes[i]; |
68 | 2 | continue; |
69 | } | |
70 | ||
71 | 10 | Class<?> resolved = resolveType( param, paramType, declaredTypes ); |
72 | ||
73 | 10 | if ( resolved != null ) |
74 | { | |
75 | 4 | if ( GenericArrayType.class.isInstance( genTypes[i] ) ) |
76 | { | |
77 | 2 | resolved = Array.newInstance( resolved, 0 ).getClass(); |
78 | } | |
79 | ||
80 | 4 | types[i] = resolved; |
81 | 4 | continue; |
82 | } | |
83 | 6 | types[i] = entry.method.getParameterTypes()[i]; |
84 | } | |
85 | ||
86 | 21 | return types; |
87 | } | |
88 | ||
89 | private Class<?> resolveType( ParameterizedType param, TypeVariable<?> var, TypeVariable<?>[] declaredTypes ) | |
90 | { | |
91 | 10 | if ( param.getActualTypeArguments().length < 1 ) |
92 | { | |
93 | 0 | return null; |
94 | } | |
95 | ||
96 | 22 | for ( int i = 0; i < declaredTypes.length; i++ ) |
97 | { | |
98 | 16 | if ( !TypeVariable.class.isInstance( param.getActualTypeArguments()[i] ) |
99 | && declaredTypes[i].getName().equals( var.getName() ) ) | |
100 | { | |
101 | 4 | return (Class<?>) param.getActualTypeArguments()[i]; |
102 | } | |
103 | } | |
104 | ||
105 | 6 | return null; |
106 | } | |
107 | } |