Source code

    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 * INVOKEVIRTUAL - Invoke instance method; dispatch based on class
    028 *
    029 * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...</PRE>
    030 *
    031 * @see
    032 * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokevirtual">
    033 * The invokevirtual instruction in The Java Virtual Machine Specification</a>
    034 */
    035public class INVOKEVIRTUAL extends InvokeInstruction {
    036
    037    /**
    038     * Empty constructor needed for Instruction.readInstruction.
    039     * Not to be used otherwise.
    040     */
    041    INVOKEVIRTUAL() {
    042    }
    043
    044
    045    public INVOKEVIRTUAL(final int index) {
    046        super(Const.INVOKEVIRTUAL, index);
    047    }
    048
    049
    050    /**
    051     * Dump instruction as byte code to stream out.
    052     * @param out Output stream
    053     */
    054    @Override
    055    public void dump( final DataOutputStream out ) throws IOException {
    056        out.writeByte(super.getOpcode());
    057        out.writeShort(super.getIndex());
    058    }
    059
    060    @Override
    061    public Class<?>[] getExceptions() {
    062        return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_FIELD_AND_METHOD_RESOLUTION,
    063            ExceptionConst.NULL_POINTER_EXCEPTION,
    064            ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR,
    065            ExceptionConst.ABSTRACT_METHOD_ERROR,
    066            ExceptionConst.UNSATISFIED_LINK_ERROR);
    067    }
    068
    069
    070    /**
    071     * Call corresponding visitor method(s). The order is:
    072     * Call visitor methods of implemented interfaces first, then
    073     * call methods according to the class hierarchy in descending order,
    074     * i.e., the most specific visitXXX() call comes last.
    075     *
    076     * @param v Visitor object
    077     */
    078    @Override
    079    public void accept( final Visitor v ) {
    080        v.visitExceptionThrower(this);
    081        v.visitTypedInstruction(this);
    082        v.visitStackConsumer(this);
    083        v.visitStackProducer(this);
    084        v.visitLoadClass(this);
    085        v.visitCPInstruction(this);
    086        v.visitFieldOrMethod(this);
    087        v.visitInvokeInstruction(this);
    088        v.visitINVOKEVIRTUAL(this);
    089    }
    090}