Fri, 30 Nov 2012 15:14:48 +0000
8002099: Add support for intersection types in cast expression
Summary: Add parser and type-checking support for intersection types in cast expressions
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2003, 2012, 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.TypeTag.CLASS;
37 /**
38 * Implementation of <code>ParameterizedType</code>, which
39 * represents an invocation of a generic class or interface.
40 *
41 * <p><b>This is NOT part of any supported API.
42 * If you write code that depends on this, you do so at your own risk.
43 * This code and its internal interfaces are subject to change or
44 * deletion without notice.</b>
45 *
46 * @author Scott Seligman
47 * @since 1.5
48 */
49 public class ParameterizedTypeImpl
50 extends AbstractTypeImpl implements ParameterizedType {
52 ParameterizedTypeImpl(DocEnv env, Type type) {
53 super(env, type);
54 }
56 /**
57 * Return the generic class or interface that declared this type.
58 */
59 @Override
60 public ClassDoc asClassDoc() {
61 return env.getClassDoc((ClassSymbol)type.tsym);
62 }
64 /**
65 * Return the actual type arguments of this type.
66 */
67 public com.sun.javadoc.Type[] typeArguments() {
68 return TypeMaker.getTypes(env, type.getTypeArguments());
69 }
71 /**
72 * Return the class type that is a direct supertype of this one.
73 * Return null if this is an interface type.
74 */
75 public com.sun.javadoc.Type superclassType() {
76 if (asClassDoc().isInterface()) {
77 return null;
78 }
79 Type sup = env.types.supertype(type);
80 return TypeMaker.getType(env,
81 (sup != type) ? sup : env.syms.objectType);
82 }
84 /**
85 * Return the interface types directly implemented by or extended by this
86 * parameterized type.
87 * Return an empty array if there are no interfaces.
88 */
89 public com.sun.javadoc.Type[] interfaceTypes() {
90 return TypeMaker.getTypes(env, env.types.interfaces(type));
91 }
93 /**
94 * Return the type that contains this type as a member.
95 * Return null is this is a top-level type.
96 */
97 public com.sun.javadoc.Type containingType() {
98 if (type.getEnclosingType().hasTag(CLASS)) {
99 // This is the type of an inner class.
100 return TypeMaker.getType(env, type.getEnclosingType());
101 }
102 ClassSymbol enclosing = type.tsym.owner.enclClass();
103 if (enclosing != null) {
104 // Nested but not inner. Return the ClassDoc of the enclosing
105 // class or interface.
106 // See java.lang.reflect.ParameterizedType.getOwnerType().
107 return env.getClassDoc(enclosing);
108 }
109 return null;
110 }
113 // Asking for the "name" of a parameterized type doesn't exactly make
114 // sense. It's a type expression. Return the name of its generic
115 // type.
116 @Override
117 public String typeName() {
118 return TypeMaker.getTypeName(type, false);
119 }
121 @Override
122 public ParameterizedType asParameterizedType() {
123 return this;
124 }
126 @Override
127 public String toString() {
128 return parameterizedTypeToString(env, (ClassType)type, true);
129 }
131 static String parameterizedTypeToString(DocEnv env, ClassType cl,
132 boolean full) {
133 if (env.legacyDoclet) {
134 return TypeMaker.getTypeName(cl, full);
135 }
136 StringBuilder s = new StringBuilder();
137 if (!(cl.getEnclosingType().hasTag(CLASS))) { // if not an inner class...
138 s.append(TypeMaker.getTypeName(cl, full));
139 } else {
140 ClassType encl = (ClassType)cl.getEnclosingType();
141 s.append(parameterizedTypeToString(env, encl, full))
142 .append('.')
143 .append(cl.tsym.name.toString());
144 }
145 s.append(TypeMaker.typeArgumentsString(env, cl, full));
146 return s.toString();
147 }
148 }