    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 */
    017package org.apache.bcel.generic;
    018
    019import java.io.DataOutputStream;
    020import java.io.IOException;
    021
    022import org.apache.bcel.Const;
    023import org.apache.bcel.ExceptionConst;
    024
    025/**
    026 * INVOKEVIRTUAL - Invoke instance method; dispatch based on class
    027 *
    028 * <PRE>
    029 * Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...
    030 * </PRE>
    031 *
    032 * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokevirtual"> The
    033 *      invokevirtual instruction in The Java Virtual Machine Specification</a>
    034 */
    035public class INVOKEVIRTUAL extends InvokeInstruction {
    036
    037    /**
    038     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
    039     */
    040    INVOKEVIRTUAL() {
    041    }
    042
    043    public INVOKEVIRTUAL(final int index) {
    044        super(Const.INVOKEVIRTUAL, index);
    045    }
    046
    047    /**
    048     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
    049     * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
    050     *
    051     * @param v Visitor object
    052     */
    053    @Override
    054    public void accept(final Visitor v) {
    055        v.visitExceptionThrower(this);
    056        v.visitTypedInstruction(this);
    057        v.visitStackConsumer(this);
    058        v.visitStackProducer(this);
    059        v.visitLoadClass(this);
    060        v.visitCPInstruction(this);
    061        v.visitFieldOrMethod(this);
    062        v.visitInvokeInstruction(this);
    063        v.visitINVOKEVIRTUAL(this);
    064    }
    065
    066    /**
    067     * Dump instruction as byte code to stream out.
    068     *
    069     * @param out Output stream
    070     */
    071    @Override
    072    public void dump(final DataOutputStream out) throws IOException {
    073        out.writeByte(super.getOpcode());
    074        out.writeShort(super.getIndex());
    075    }
    076
    077    @Override
    078    public Class<?>[] getExceptions() {
    079        return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_FIELD_AND_METHOD_RESOLUTION, ExceptionConst.NULL_POINTER_EXCEPTION,
    080            ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR, ExceptionConst.ABSTRACT_METHOD_ERROR, ExceptionConst.UNSATISFIED_LINK_ERROR);
    081    }
    082}