Thu, 12 Jan 2012 15:28:34 +0000
7123100: javac fails with java.lang.StackOverflowError
Summary: Inference of under-constrained type-variables creates erroneous recursive wildcard types
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2003, 2011, 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 */
26 package com.sun.tools.javadoc;
28 import com.sun.javadoc.*;
30 import com.sun.tools.javac.code.Symbol.ClassSymbol;
31 import com.sun.tools.javac.code.Type;
32 import com.sun.tools.javac.code.Type.ClassType;
34 import static com.sun.tools.javac.code.TypeTags.*;
37 /**
38 * Implementation of <code>ParameterizedType</code>, which
39 * represents an invocation of a generic class or interface.
40 *
41 * @author Scott Seligman
42 * @since 1.5
43 */
44 public class ParameterizedTypeImpl
45 extends AbstractTypeImpl implements ParameterizedType {
47 ParameterizedTypeImpl(DocEnv env, Type type) {
48 super(env, type);
49 }
51 /**
52 * Return the generic class or interface that declared this type.
53 */
54 @Override
55 public ClassDoc asClassDoc() {
56 return env.getClassDoc((ClassSymbol)type.tsym);
57 }
59 /**
60 * Return the actual type arguments of this type.
61 */
62 public com.sun.javadoc.Type[] typeArguments() {
63 return TypeMaker.getTypes(env, type.getTypeArguments());
64 }
66 /**
67 * Return the class type that is a direct supertype of this one.
68 * Return null if this is an interface type.
69 */
70 public com.sun.javadoc.Type superclassType() {
71 if (asClassDoc().isInterface()) {
72 return null;
73 }
74 Type sup = env.types.supertype(type);
75 return TypeMaker.getType(env,
76 (sup != type) ? sup : env.syms.objectType);
77 }
79 /**
80 * Return the interface types directly implemented by or extended by this
81 * parameterized type.
82 * Return an empty array if there are no interfaces.
83 */
84 public com.sun.javadoc.Type[] interfaceTypes() {
85 return TypeMaker.getTypes(env, env.types.interfaces(type));
86 }
88 /**
89 * Return the type that contains this type as a member.
90 * Return null is this is a top-level type.
91 */
92 public com.sun.javadoc.Type containingType() {
93 if (type.getEnclosingType().tag == CLASS) {
94 // This is the type of an inner class.
95 return TypeMaker.getType(env, type.getEnclosingType());
96 }
97 ClassSymbol enclosing = type.tsym.owner.enclClass();
98 if (enclosing != null) {
99 // Nested but not inner. Return the ClassDoc of the enclosing
100 // class or interface.
101 // See java.lang.reflect.ParameterizedType.getOwnerType().
102 return env.getClassDoc(enclosing);
103 }
104 return null;
105 }
108 // Asking for the "name" of a parameterized type doesn't exactly make
109 // sense. It's a type expression. Return the name of its generic
110 // type.
111 @Override
112 public String typeName() {
113 return TypeMaker.getTypeName(type, false);
114 }
116 @Override
117 public ParameterizedType asParameterizedType() {
118 return this;
119 }
121 @Override
122 public String toString() {
123 return parameterizedTypeToString(env, (ClassType)type, true);
124 }
126 static String parameterizedTypeToString(DocEnv env, ClassType cl,
127 boolean full) {
128 if (env.legacyDoclet) {
129 return TypeMaker.getTypeName(cl, full);
130 }
131 StringBuilder s = new StringBuilder();
132 if (cl.getEnclosingType().tag != CLASS) { // if not an inner class...
133 s.append(TypeMaker.getTypeName(cl, full));
134 } else {
135 ClassType encl = (ClassType)cl.getEnclosingType();
136 s.append(parameterizedTypeToString(env, encl, full))
137 .append('.')
138 .append(cl.tsym.name.toString());
139 }
140 s.append(TypeMaker.typeArgumentsString(env, cl, full));
141 return s.toString();
142 }
143 }