1 /*

     2  * Copyright (c) 1998, 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  */

    25 

    26 package com.sun.tools.jdi;

    27 

    28 import com.sun.jdi.*;

    29 

    30 import java.util.List;

    31 import java.util.ArrayList;

    32 import java.util.Collections;

    33 import java.util.Set;

    34 import java.lang.ref.SoftReference;

    35 

    36 final public class InterfaceTypeImpl extends InvokableTypeImpl

    37                                      implements InterfaceType {

    38 

    39     private static class IResult implements InvocationResult {

    40         final private JDWP.InterfaceType.InvokeMethod rslt;

    41 

    42         public IResult(JDWP.InterfaceType.InvokeMethod rslt) {

    43             this.rslt = rslt;

    44         }

    45 

    46         @Override

    47         public ObjectReferenceImpl getException() {

    48             return rslt.exception;

    49         }

    50 

    51         @Override

    52         public ValueImpl getResult() {

    53             return rslt.returnValue;

    54         }

    55 

    56     }

    57 

    58     private SoftReference<List<InterfaceType>> superinterfacesRef = null;

    59 

    60     protected InterfaceTypeImpl(VirtualMachine aVm,long aRef) {

    61         super(aVm, aRef);

    62     }

    63 

    64     public List<InterfaceType> superinterfaces() {

    65         List<InterfaceType> superinterfaces = (superinterfacesRef == null) ? null :

    66                                      superinterfacesRef.get();

    67         if (superinterfaces == null) {

    68             superinterfaces = getInterfaces();

    69             superinterfaces = Collections.unmodifiableList(superinterfaces);

    70             superinterfacesRef = new SoftReference<List<InterfaceType>>(superinterfaces);

    71         }

    72         return superinterfaces;

    73     }

    74 

    75     public List<InterfaceType> subinterfaces() {

    76         List<InterfaceType> subs = new ArrayList<InterfaceType>();

    77         for (ReferenceType refType : vm.allClasses()) {

    78             if (refType instanceof InterfaceType) {

    79                 InterfaceType interfaze = (InterfaceType)refType;

    80                 if (interfaze.isPrepared() && interfaze.superinterfaces().contains(this)) {

    81                     subs.add(interfaze);

    82                 }

    83             }

    84         }

    85         return subs;

    86     }

    87 

    88     public List<ClassType> implementors() {

    89         List<ClassType> implementors = new ArrayList<ClassType>();

    90         for (ReferenceType refType : vm.allClasses()) {

    91             if (refType instanceof ClassType) {

    92                 ClassType clazz = (ClassType)refType;

    93                 if (clazz.isPrepared() && clazz.interfaces().contains(this)) {

    94                     implementors.add(clazz);

    95                 }

    96             }

    97         }

    98         return implementors;

    99     }

   100 

   101     public boolean isInitialized() {

   102         return isPrepared();

   103     }

   104 

   105     public String toString() {

   106        return "interface " + name() + " (" + loaderString() + ")";

   107     }

   108 

   109     @Override

   110     InvocationResult waitForReply(PacketStream stream) throws JDWPException {

   111         return new IResult(JDWP.InterfaceType.InvokeMethod.waitForReply(vm, stream));

   112     }

   113 

   114     @Override

   115     CommandSender getInvokeMethodSender(final ThreadReferenceImpl thread,

   116                                         final MethodImpl method,

   117                                         final ValueImpl[] args,

   118                                         final int options) {

   119         return () ->

   120             JDWP.InterfaceType.InvokeMethod.enqueueCommand(vm,

   121                                                            InterfaceTypeImpl.this,

   122                                                            thread,

   123                                                            method.ref(),

   124                                                            args,

   125                                                            options);

   126     }

   127 

   128     @Override

   129     ClassType superclass() {

   130         return null;

   131     }

   132 

   133     @Override

   134     List<InterfaceType> interfaces() {

   135         return superinterfaces();

   136     }

   137 

   138     @Override

   139     boolean canInvoke(Method method) {

   140         // method must be directly in this interface

   141         return this.equals(method.declaringType());

   142     }

   143 }