1 /*
2 * Copyright (c) 2003, 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
27
28
29 import java.lang.reflect.Type;
30 import sun.reflect.generics.factory.GenericsFactory;
31 import sun.reflect.generics.tree.TypeSignature;
32 import sun.reflect.generics.parser.SignatureParser;
33 import sun.reflect.generics.visitor.Reifier;
34
35
36
37 /**
38 * This class represents the generic type information for a constructor.
39 * The code is not dependent on a particular reflective implementation.
40 * It is designed to be used unchanged by at least core reflection and JDI.
41 */
42 public class FieldRepository extends AbstractRepository<TypeSignature> {
43
44 /** The generic type info. Lazily initialized. */
45 private volatile Type genericType;
46
47 // protected, to enforce use of static factory yet allow subclassing
48 protected FieldRepository(String rawSig, GenericsFactory f) {
49 super(rawSig, f);
50 }
51
52 protected TypeSignature parse(String s) {
53 return SignatureParser.make().parseTypeSig(s);
54 }
55
56 /**
57 * Static factory method.
58 * @param rawSig - the generic signature of the reflective object
59 * that this repository is servicing
60 * @param f - a factory that will provide instances of reflective
61 * objects when this repository converts its AST
62 * @return a {@code FieldRepository} that manages the generic type
63 * information represented in the signature {@code rawSig}
64 */
65 public static FieldRepository make(String rawSig, GenericsFactory f) {
66 return new FieldRepository(rawSig, f);
67 }
68
69 /*
70 * When queried for a particular piece of type information, the
71 * general pattern is to consult the corresponding cached value.
72 * If the corresponding field is non-null, it is returned.
73 * If not, it is created lazily. This is done by selecting the appropriate
74 * part of the tree and transforming it into a reflective object
75 * using a visitor, which is created by feeding it the factory
76 * with which the repository was created.
77 */
78
79 public Type getGenericType() {
80 Type value = genericType;
81 if (value == null) {
82 value = computeGenericType();
83 genericType = value;
84 }
85 return value;
86 }
87
88 private Type computeGenericType() {
89 Reifier r = getReifier(); // obtain visitor
90 getTree().accept(r); // reify subtree
91 return r.getResult(); // extract result from visitor
92 }
93 }
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1 /*
2 * Copyright (c) 2003, 2020, 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
27
28
29 import java.lang.reflect.Type;
30 import sun.reflect.generics.factory.GenericsFactory;
31 import sun.reflect.generics.tree.TypeSignature;
32 import sun.reflect.generics.parser.SignatureParser;
33 import sun.reflect.generics.visitor.Reifier;
34
35
36
37 /**
38 * This class represents the generic type information for a constructor.
39 * The code is not dependent on a particular reflective implementation.
40 * It is designed to be used unchanged by at least core reflection and JDI.
41 */
42 public class FieldRepository extends AbstractRepository<TypeSignature> {
43
44 /** The generic type info. Lazily initialized. */
45 private volatile Type genericType;
46
47 // protected, to enforce use of static factory yet allow subclassing
48 protected FieldRepository(String rawSig, GenericsFactory f) {
49 super(rawSig, f);
50 }
51
52 protected TypeSignature parse(String s) {
53 return SignatureParser.make().parseTypeSig(s);
54 }
55
56 /**
57 * Static factory method.
58 * @param rawSig - the generic signature of the reflective object
59 * that this repository is servicing
60 * @param f - a factory that will provide instances of reflective
61 * objects when this repository converts its AST
62 * @return a {@code FieldRepository} that manages the generic type
63 * information represented in the signature {@code rawSig}
64 */
65 public static FieldRepository make(String rawSig, GenericsFactory f) {
66 return new FieldRepository(rawSig, f);
67 }
68
69 /*
70 * When queried for a particular piece of type information, the
71 * general pattern is to consult the corresponding cached value.
72 * If the corresponding field is non-null, it is returned.
73 * If not, it is created lazily. This is done by selecting the appropriate
74 * part of the tree and transforming it into a reflective object
75 * using a visitor, which is created by feeding it the factory
76 * with which the repository was created.
77 */
78
79 public Type getGenericType() {
80 Type value = genericType;
81 if (value == null) {
82 value = computeGenericType();
83 genericType = value;
84 }
85 return value;
86 }
87
88 private Type computeGenericType() {
89 Reifier r = getReifier(); // obtain visitor
90 getTree().accept(r); // reify subtree
91 return r.getResult(); // extract result from visitor
92 }
93 }
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