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      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one or more
      3  * contributor license agreements.  See the NOTICE file distributed with
      4  * this work for additional information regarding copyright ownership.
      5  * The ASF licenses this file to You under the Apache License, Version 2.0
      6  * (the "License"); you may not use this file except in compliance with
      7  * the License.  You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  *  Unless required by applicable law or agreed to in writing, software
     12  *  distributed under the License is distributed on an "AS IS" BASIS,
     13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  *  See the License for the specific language governing permissions and
     15  *  limitations under the License.
     16  *
     17  */
     18 package org.apache.bcel.generic;
     19 
     20 import java.io.DataOutputStream;
     21 import java.io.IOException;
     22 
     23 import org.apache.bcel.Const;
     24 import org.apache.bcel.ExceptionConst;
     25 
     26 /**
     27  * INVOKESPECIAL - Invoke instance method; special handling for superclass, private
     28  * and instance initialization method invocations
     29  *
     30  * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...</PRE>
     31  *
     32  * @version $Id$
     33  * @see
     34  * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokespecial">
     35  * The invokespecial instruction in The Java Virtual Machine Specification</a>
     36  */
     37 public class INVOKESPECIAL extends InvokeInstruction {
     38 
     39     /**
     40      * Empty constructor needed for Instruction.readInstruction.
     41      * Not to be used otherwise.
     42      */
     43     INVOKESPECIAL() {
     44     }
     45 
     46 
     47     public INVOKESPECIAL(final int index) {
     48         super(Const.INVOKESPECIAL, index);
     49     }
     50 
     51 
     52     /**
     53      * Dump instruction as byte code to stream out.
     54      * @param out Output stream
     55      */
     56     @Override
     57     public void dump( final DataOutputStream out ) throws IOException {
     58         out.writeByte(super.getOpcode());
     59         out.writeShort(super.getIndex());
     60     }
     61 
     62     @Override
     63     public Class<?>[] getExceptions() {
     64         return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_FIELD_AND_METHOD_RESOLUTION,
     65             ExceptionConst.NULL_POINTER_EXCEPTION,
     66             ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR,
     67             ExceptionConst.ABSTRACT_METHOD_ERROR,
     68             ExceptionConst.UNSATISFIED_LINK_ERROR);
     69     }
     70 
     71 
     72     /**
     73      * Call corresponding visitor method(s). The order is:
     74      * Call visitor methods of implemented interfaces first, then
     75      * call methods according to the class hierarchy in descending order,
     76      * i.e., the most specific visitXXX() call comes last.
     77      *
     78      * @param v Visitor object
     79      */
     80     @Override
     81     public void accept( final Visitor v ) {
     82         v.visitExceptionThrower(this);
     83         v.visitTypedInstruction(this);
     84         v.visitStackConsumer(this);
     85         v.visitStackProducer(this);
     86         v.visitLoadClass(this);
     87         v.visitCPInstruction(this);
     88         v.visitFieldOrMethod(this);
     89         v.visitInvokeInstruction(this);
     90         v.visitINVOKESPECIAL(this);
     91     }
     92 }
     93