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