jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javadoc/WildcardTypeImpl.java@dea82aa3ca4f

     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;

    29 import com.sun.javadoc.*;

    31 import com.sun.tools.javac.code.Symbol.ClassSymbol;

    32 import com.sun.tools.javac.code.Type;

    33 import com.sun.tools.javac.util.List;

    36 /**

    37  * Implementation of <code>WildcardType</code>, which

    38  * represents a wildcard type.

    39  *

    40  * @author Scott Seligman

    41  * @since 1.5

    42  */

    43 public class WildcardTypeImpl extends AbstractTypeImpl implements WildcardType {

    45     WildcardTypeImpl(DocEnv env, Type.WildcardType type) {

    46         super(env, type);

    47     }

    49     /**

    50      * Return the upper bounds of this wildcard type argument

    51      * as given by the <i>extends</i> clause.

    52      * Return an empty array if no such bounds are explicitly given.

    53      */

    54     public com.sun.javadoc.Type[] extendsBounds() {

    55         return TypeMaker.getTypes(env, getExtendsBounds((Type.WildcardType)type));

    56     }

    58     /**

    59      * Return the lower bounds of this wildcard type argument

    60      * as given by the <i>super</i> clause.

    61      * Return an empty array if no such bounds are explicitly given.

    62      */

    63     public com.sun.javadoc.Type[] superBounds() {

    64         return TypeMaker.getTypes(env, getSuperBounds((Type.WildcardType)type));

    65     }

    67     /**

    68      * Return the ClassDoc of the erasure of this wildcard type.

    69      */

    70     @Override

    71     public ClassDoc asClassDoc() {

    72         return env.getClassDoc((ClassSymbol)env.types.erasure(type).tsym);

    73     }

    75     @Override

    76     public WildcardType asWildcardType() {

    77         return this;

    78     }

    80     @Override

    81     public String typeName()            { return "?"; }

    82     @Override

    83     public String qualifiedTypeName()   { return "?"; }

    84     @Override

    85     public String simpleTypeName()      { return "?"; }

    87     @Override

    88     public String toString() {

    89         return wildcardTypeToString(env, (Type.WildcardType)type, true);

    90     }

    93     /**

    94      * Return the string form of a wildcard type ("?") along with any

    95      * "extends" or "super" clause.  Delimiting brackets are not

    96      * included.  Class names are qualified if "full" is true.

    97      */

    98     static String wildcardTypeToString(DocEnv env,

    99                                        Type.WildcardType wildThing, boolean full) {

   100         if (env.legacyDoclet) {

   101             return TypeMaker.getTypeName(env.types.erasure(wildThing), full);

   102         }

   103         StringBuilder s = new StringBuilder("?");

   104         List<Type> bounds = getExtendsBounds(wildThing);

   105         if (bounds.nonEmpty()) {

   106             s.append(" extends ");

   107         } else {

   108             bounds = getSuperBounds(wildThing);

   109             if (bounds.nonEmpty()) {

   110                 s.append(" super ");

   111             }

   112         }

   113         boolean first = true;   // currently only one bound is allowed

   114         for (Type b : bounds) {

   115             if (!first) {

   116                 s.append(" & ");

   117             }

   118             s.append(TypeMaker.getTypeString(env, b, full));

   119             first = false;

   120         }

   121         return s.toString();

   122     }

   124     private static List<Type> getExtendsBounds(Type.WildcardType wild) {

   125         return wild.isSuperBound()

   126                 ? List.<Type>nil()

   127                 : List.of(wild.type);

   128     }

   130     private static List<Type> getSuperBounds(Type.WildcardType wild) {

   131         return wild.isExtendsBound()

   132                 ? List.<Type>nil()

   133                 : List.of(wild.type);

   134     }

   135 }

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