1 /*

     2  * Copyright (c) 2004, 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  */

    25 

    26 package com.sun.tools.apt.mirror.type;

    27 

    28 

    29 import java.util.ArrayList;

    30 import java.util.Collection;

    31 import java.util.Collections;

    32 

    33 import com.sun.mirror.declaration.*;

    34 import com.sun.mirror.type.*;

    35 import com.sun.mirror.util.TypeVisitor;

    36 import com.sun.tools.apt.mirror.AptEnv;

    37 import com.sun.tools.javac.code.*;

    38 import com.sun.tools.javac.code.Symbol.*;

    39 

    40 

    41 /**

    42  * Implementation of WildcardType

    43  */

    44 @SuppressWarnings("deprecation")

    45 public class WildcardTypeImpl extends TypeMirrorImpl implements WildcardType {

    46 

    47     protected Type.WildcardType type;

    48 

    49     WildcardTypeImpl(AptEnv env, Type.WildcardType type) {

    50         super(env, type);

    51         this.type = type;

    52     }

    53 

    54 

    55     /**

    56      * Returns the string form of a wildcard type, consisting of "?"

    57      * and any "extends" or "super" clause.

    58      * Delimiting brackets are not included.  Class names are qualified.

    59      */

    60     public String toString() {

    61         return toString(env, type);

    62     }

    63 

    64     /**

    65      * {@inheritDoc}

    66      */

    67     public Collection<ReferenceType> getUpperBounds() {

    68         return type.isSuperBound()

    69                 ? Collections.<ReferenceType>emptyList()

    70                 : typeToCollection(type.type);

    71     }

    72 

    73     /**

    74      * {@inheritDoc}

    75      */

    76     public Collection<ReferenceType> getLowerBounds() {

    77         return type.isExtendsBound()

    78                 ? Collections.<ReferenceType>emptyList()

    79                 : typeToCollection(type.type);

    80     }

    81 

    82     /**

    83      * Gets the ReferenceType for a javac Type object, and returns

    84      * it in a singleton collection.  If type is null, returns an empty

    85      * collection.

    86      */

    87     private Collection<ReferenceType> typeToCollection(Type type) {

    88         ArrayList<ReferenceType> res = new ArrayList<ReferenceType>(1);

    89         if (type != null) {

    90             res.add((ReferenceType) env.typeMaker.getType(type));

    91         }

    92         return res;

    93     }

    94 

    95     /**

    96      * {@inheritDoc}

    97      */

    98     public void accept(TypeVisitor v) {

    99         v.visitWildcardType(this);

   100     }

   101 

   102 

   103     /**

   104      * Returns the string form of a wildcard type, consisting of "?"

   105      * and any "extends" or "super" clause.

   106      * See {@link #toString()} for details.

   107      */

   108     static String toString(AptEnv env, Type.WildcardType wildThing) {

   109         return wildThing.toString();

   110     }

   111 }