jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javadoc/WildcardTypeImpl.java@d1ea43cb71c1

     1 /*

     2  * Copyright (c) 2003, 2005, 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 static com.sun.javadoc.LanguageVersion.*;

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

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

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

    38 /**

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

    40  * represents a wildcard type.

    41  *

    42  * @author Scott Seligman

    43  * @since 1.5

    44  */

    45 public class WildcardTypeImpl extends AbstractTypeImpl implements WildcardType {

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

    48         super(env, type);

    49     }

    51     /**

    52      * Return the upper bounds of this wildcard type argument

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

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

    55      */

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

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

    58     }

    60     /**

    61      * Return the lower bounds of this wildcard type argument

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

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

    64      */

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

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

    67     }

    69     /**

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

    71      */

    72     public ClassDoc asClassDoc() {

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

    74     }

    76     public WildcardType asWildcardType() {

    77         return this;

    78     }

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

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

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

    84     public String toString() {

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

    86     }

    89     /**

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

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

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

    93      */

    94     static String wildcardTypeToString(DocEnv env,

    95                                        Type.WildcardType wildThing, boolean full) {

    96         if (env.legacyDoclet) {

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

    98         }

    99         StringBuffer s = new StringBuffer("?");

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

   101         if (bounds.nonEmpty()) {

   102             s.append(" extends ");

   103         } else {

   104             bounds = getSuperBounds(wildThing);

   105             if (bounds.nonEmpty()) {

   106                 s.append(" super ");

   107             }

   108         }

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

   110         for (Type b : bounds) {

   111             if (!first) {

   112                 s.append(" & ");

   113             }

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

   115             first = false;

   116         }

   117         return s.toString();

   118     }

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

   121         return wild.isSuperBound()

   122                 ? List.<Type>nil()

   123                 : List.of(wild.type);

   124     }

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

   127         return wild.isExtendsBound()

   128                 ? List.<Type>nil()

   129                 : List.of(wild.type);

   130     }

   131 }

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