1 /*

     2  * Copyright (c) 2004, 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  */

    25 

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

    27 

    28 

    29 import java.util.Collection;

    30 import java.util.ArrayList;

    31 

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

    33 import com.sun.mirror.type.ReferenceType;

    34 import com.sun.mirror.util.DeclarationVisitor;

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

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

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

    38 

    39 

    40 /**

    41  * Implementation of TypeParameterDeclaration

    42  */

    43 @SuppressWarnings("deprecation")

    44 public class TypeParameterDeclarationImpl extends DeclarationImpl

    45                                           implements TypeParameterDeclaration

    46 {

    47     protected TypeSymbol sym;

    48 

    49 

    50     TypeParameterDeclarationImpl(AptEnv env, TypeSymbol sym) {

    51         super(env, sym);

    52         this.sym = sym;

    53     }

    54 

    55 

    56     /**

    57      * Returns the type parameter's name along with any "extends" clause.

    58      * Class names are qualified.  No implicit "extends Object" is added.

    59      */

    60     public String toString() {

    61         return toString(env, (Type.TypeVar) sym.type);

    62     }

    63 

    64     /**

    65      * {@inheritDoc}

    66      */

    67     public Collection<ReferenceType> getBounds() {

    68         ArrayList<ReferenceType> res = new ArrayList<ReferenceType>();

    69         for (Type t : env.jctypes.getBounds((Type.TypeVar) sym.type)) {

    70             res.add((ReferenceType) env.typeMaker.getType(t));

    71         }

    72         return res;

    73     }

    74 

    75     /**

    76      * {@inheritDoc}

    77      */

    78     public Declaration getOwner() {

    79         Symbol owner = sym.owner;

    80         return ((owner.kind & Kinds.TYP) != 0)

    81                ? env.declMaker.getTypeDeclaration((ClassSymbol) owner)

    82                : env.declMaker.getExecutableDeclaration((MethodSymbol) owner);

    83     }

    84 

    85 

    86 

    87     /**

    88      * {@inheritDoc}

    89      */

    90     public void accept(DeclarationVisitor v) {

    91         v.visitTypeParameterDeclaration(this);

    92     }

    93 

    94 

    95     /**

    96      * Returns the type parameter's name along with any "extends" clause.

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

    98      */

    99     static String toString(AptEnv env, Type.TypeVar tv) {

   100         StringBuilder s = new StringBuilder();

   101         s.append(tv);

   102         boolean first = true;

   103         for (Type bound : getExtendsBounds(env, tv)) {

   104             s.append(first ? " extends " : " & ");

   105             s.append(env.typeMaker.typeToString(bound));

   106             first = false;

   107         }

   108         return s.toString();

   109     }

   110 

   111     /**

   112      * Returns the bounds of a type variable, eliding java.lang.Object

   113      * if it appears alone.

   114      */

   115     private static Iterable<Type> getExtendsBounds(AptEnv env,

   116                                                    Type.TypeVar tv) {

   117         return (tv.getUpperBound().tsym == env.symtab.objectType.tsym)

   118                ? com.sun.tools.javac.util.List.<Type>nil()

   119                : env.jctypes.getBounds(tv);

   120     }

   121 }