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 ...]] -> ...</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}