1 /*
2 * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.reflect.generics.factory;
27
28 import java.lang.reflect.Array;
29 import java.lang.reflect.Constructor;
30 import java.lang.reflect.GenericDeclaration;
31 import java.lang.reflect.Method;
32 import java.lang.reflect.ParameterizedType;
33 import java.lang.reflect.Type;
34 import java.lang.reflect.TypeVariable;
35 import java.lang.reflect.WildcardType;
36
37
38 import sun.reflect.generics.reflectiveObjects.*;
39 import sun.reflect.generics.scope.Scope;
40 import sun.reflect.generics.tree.FieldTypeSignature;
41
42
43 /**
44 * Factory for reflective generic type objects for use by
45 * core reflection (java.lang.reflect).
46 */
47 public class CoreReflectionFactory implements GenericsFactory {
48 private final GenericDeclaration decl;
49 private final Scope scope;
50
51 private CoreReflectionFactory(GenericDeclaration d, Scope s) {
52 decl = d;
53 scope = s;
54 }
55
56 private GenericDeclaration getDecl(){ return decl;}
57
58 private Scope getScope(){ return scope;}
59
60
61 private ClassLoader getDeclsLoader() {
62 if (decl instanceof Class) {return ((Class) decl).getClassLoader();}
63 if (decl instanceof Method) {
64 return ((Method) decl).getDeclaringClass().getClassLoader();
65 }
66 assert decl instanceof Constructor : "Constructor expected";
67 return ((Constructor) decl).getDeclaringClass().getClassLoader();
68
69 }
70
71 /**
72 * Factory for this class. Returns an instance of
73 * {@code CoreReflectionFactory} for the declaration and scope
74 * provided.
75 * This factory will produce reflective objects of the appropriate
76 * kind. Classes produced will be those that would be loaded by the
77 * defining class loader of the declaration {@code d} (if {@code d}
78 * is a type declaration, or by the defining loader of the declaring
79 * class of {@code d} otherwise.
80 * <p> Type variables will be created or lookup as necessary in the
81 * scope {@code s}.
82 * @param d - the generic declaration (class, interface, method or
83 * constructor) that this factory services
84 * @param s the scope in which the factory will allocate and search for
85 * type variables
86 * @return an instance of {@code CoreReflectionFactory}
87 */
88 public static CoreReflectionFactory make(GenericDeclaration d, Scope s) {
89 return new CoreReflectionFactory(d, s);
90 }
91
92 public TypeVariable<?> makeTypeVariable(String name,
93 FieldTypeSignature[] bounds){
94 return TypeVariableImpl.make(getDecl(), name, bounds, this);
95 }
96
97 public WildcardType makeWildcard(FieldTypeSignature[] ubs,
98 FieldTypeSignature[] lbs) {
99 return WildcardTypeImpl.make(ubs, lbs, this);
100 }
101
102 public ParameterizedType makeParameterizedType(Type declaration,
103 Type[] typeArgs,
104 Type owner) {
105 return ParameterizedTypeImpl.make((Class<?>) declaration,
106 typeArgs, owner);
107 }
108
109 public TypeVariable<?> findTypeVariable(String name){
110 return getScope().lookup(name);
111 }
112
113 public Type makeNamedType(String name){
114 try {return Class.forName(name, false, // don't initialize
115 getDeclsLoader());}
116 catch (ClassNotFoundException c) {
117 throw new TypeNotPresentException(name, c);
118 }
119 }
120
121 public Type makeArrayType(Type componentType){
122 if (componentType instanceof Class<?>)
123 return Array.newInstance((Class<?>) componentType, 0).getClass();
124 else
125 return GenericArrayTypeImpl.make(componentType);
126 }
127
128 public Type makeByte(){return byte.class;}
129 public Type makeBool(){return boolean.class;}
130 public Type makeShort(){return short.class;}
131 public Type makeChar(){return char.class;}
132 public Type makeInt(){return int.class;}
133 public Type makeLong(){return long.class;}
134 public Type makeFloat(){return float.class;}
135 public Type makeDouble(){return double.class;}
136
137 public Type makeVoid(){return void.class;}
138 }