1 /*
2 * Copyright 2003 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package sun.reflect.generics.factory;
27
28 import java.lang.reflect.Constructor;
29 import java.lang.reflect.GenericDeclaration;
30 import java.lang.reflect.Method;
31 import java.lang.reflect.ParameterizedType;
32 import java.lang.reflect.Type;
33 import java.lang.reflect.TypeVariable;
34 import java.lang.reflect.WildcardType;
35
36
37 import sun.reflect.generics.reflectiveObjects;
38 import sun.reflect.generics.scope.Scope;
39 import sun.reflect.generics.tree.FieldTypeSignature;
40
41
42 /**
43 * Factory for reflective generic type objects for use by
44 * core reflection (java.lang.reflect).
45 */
46 public class CoreReflectionFactory implements GenericsFactory {
47 private GenericDeclaration decl;
48 private Scope scope;
49
50 private CoreReflectionFactory(GenericDeclaration d, Scope s) {
51 decl = d;
52 scope = s;
53 }
54
55 private GenericDeclaration getDecl(){ return decl;}
56
57 private Scope getScope(){ return scope;}
58
59
60 private ClassLoader getDeclsLoader() {
61 if (decl instanceof Class) {return ((Class) decl).getClassLoader();}
62 if (decl instanceof Method) {
63 return ((Method) decl).getDeclaringClass().getClassLoader();
64 }
65 assert decl instanceof Constructor : "Constructor expected";
66 return ((Constructor) decl).getDeclaringClass().getClassLoader();
67
68 }
69
70 /**
71 * Factory for this class. Returns an instance of
72 * <tt>CoreReflectionFactory</tt> for the declaration and scope
73 * provided.
74 * This factory will produce reflective objects of the appropriate
75 * kind. Classes produced will be those that would be loaded by the
76 * defining class loader of the declaration <tt>d</tt> (if <tt>d</tt>
77 * is a type declaration, or by the defining loader of the declaring
78 * class of <tt>d</tt> otherwise.
79 * <p> Type variables will be created or lookup as necessary in the
80 * scope <tt> s</tt>.
81 * @param d - the generic declaration (class, interface, method or
82 * constructor) that thsi factory services
83 * @param s the scope in which the factory will allocate and search for
84 * type variables
85 * @return an instance of <tt>CoreReflectionFactory</tt>
86 */
87 public static CoreReflectionFactory make(GenericDeclaration d, Scope s) {
88 return new CoreReflectionFactory(d, s);
89 }
90
91 public TypeVariable<?> makeTypeVariable(String name,
92 FieldTypeSignature[] bounds){
93 return TypeVariableImpl.make(getDecl(), name, bounds, this);
94 }
95
96 public WildcardType makeWildcard(FieldTypeSignature[] ubs,
97 FieldTypeSignature[] lbs) {
98 return WildcardTypeImpl.make(ubs, lbs, this);
99 }
100
101 public ParameterizedType makeParameterizedType(Type declaration,
102 Type[] typeArgs,
103 Type owner) {
104 return ParameterizedTypeImpl.make((Class<?>) declaration,
105 typeArgs, owner);
106 }
107
108 public TypeVariable<?> findTypeVariable(String name){
109 return getScope().lookup(name);
110 }
111
112 public Type makeNamedType(String name){
113 try {return Class.forName(name, false, // don't initialize
114 getDeclsLoader());}
115 catch (ClassNotFoundException c) {
116 throw new TypeNotPresentException(name, c);
117 }
118 }
119
120 public Type makeArrayType(Type componentType){
121 return GenericArrayTypeImpl.make(componentType);
122 }
123
124 public Type makeByte(){return byte.class;}
125 public Type makeBool(){return boolean.class;}
126 public Type makeShort(){return short.class;}
127 public Type makeChar(){return char.class;}
128 public Type makeInt(){return int.class;}
129 public Type makeLong(){return long.class;}
130 public Type makeFloat(){return float.class;}
131 public Type makeDouble(){return double.class;}
132
133 public Type makeVoid(){return void.class;}
134 }
Save This Page