1 /*
   2  * Copyright 2004 Sun Microsystems, Inc.  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.  Sun designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  22  * CA 95054 USA or visit www.sun.com if you need additional information or
  23  * have any 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 
  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 }