    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 *  Unless required by applicable law or agreed to in writing, software
    012 *  distributed under the License is distributed on an "AS IS" BASIS,
    013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 *  See the License for the specific language governing permissions and
    015 *  limitations under the License.
    016 *
    017 */
    018package org.apache.bcel.generic;
    019
    020import java.io.DataOutputStream;
    021import java.io.IOException;
    022
    023import org.apache.bcel.Const;
    024import org.apache.bcel.ExceptionConst;
    025
    026/**
    027 * INVOKESPECIAL - Invoke instance method; special handling for superclass, private
    028 * and instance initialization method invocations
    029 *
    030 * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...</PRE>
    031 *
    032 * @version $Id$
    033 * @see
    034 * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokespecial">
    035 * The invokespecial instruction in The Java Virtual Machine Specification</a>
    036 */
    037public class INVOKESPECIAL extends InvokeInstruction {
    038
    039    /**
    040     * Empty constructor needed for Instruction.readInstruction.
    041     * Not to be used otherwise.
    042     */
    043    INVOKESPECIAL() {
    044    }
    045
    046
    047    public INVOKESPECIAL(final int index) {
    048        super(Const.INVOKESPECIAL, index);
    049    }
    050
    051
    052    /**
    053     * Dump instruction as byte code to stream out.
    054     * @param out Output stream
    055     */
    056    @Override
    057    public void dump( final DataOutputStream out ) throws IOException {
    058        out.writeByte(super.getOpcode());
    059        out.writeShort(super.getIndex());
    060    }
    061
    062    @Override
    063    public Class<?>[] getExceptions() {
    064        return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_FIELD_AND_METHOD_RESOLUTION,
    065            ExceptionConst.NULL_POINTER_EXCEPTION,
    066            ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR,
    067            ExceptionConst.ABSTRACT_METHOD_ERROR,
    068            ExceptionConst.UNSATISFIED_LINK_ERROR);
    069    }
    070
    071
    072    /**
    073     * Call corresponding visitor method(s). The order is:
    074     * Call visitor methods of implemented interfaces first, then
    075     * call methods according to the class hierarchy in descending order,
    076     * i.e., the most specific visitXXX() call comes last.
    077     *
    078     * @param v Visitor object
    079     */
    080    @Override
    081    public void accept( final Visitor v ) {
    082        v.visitExceptionThrower(this);
    083        v.visitTypedInstruction(this);
    084        v.visitStackConsumer(this);
    085        v.visitStackProducer(this);
    086        v.visitLoadClass(this);
    087        v.visitCPInstruction(this);
    088        v.visitFieldOrMethod(this);
    089        v.visitInvokeInstruction(this);
    090        v.visitINVOKESPECIAL(this);
    091    }
    092}