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.ExceptionConst; 024import org.apache.bcel.util.ByteSequence; 025 026/** 027 * NEWARRAY - Create new array of basic type (int, short, ...) 028 * <PRE>Stack: ..., count -> ..., arrayref</PRE> 029 * type must be one of T_INT, T_SHORT, ... 030 * 031 */ 032public class NEWARRAY extends Instruction implements AllocationInstruction, ExceptionThrower, 033 StackProducer { 034 035 private byte type; 036 037 038 /** 039 * Empty constructor needed for Instruction.readInstruction. 040 * Not to be used otherwise. 041 */ 042 NEWARRAY() { 043 } 044 045 046 public NEWARRAY(final byte type) { 047 super(org.apache.bcel.Const.NEWARRAY, (short) 2); 048 this.type = type; 049 } 050 051 052 public NEWARRAY(final BasicType type) { 053 this(type.getType()); 054 } 055 056 057 /** 058 * Dump instruction as byte code to stream out. 059 * @param out Output stream 060 */ 061 @Override 062 public void dump( final DataOutputStream out ) throws IOException { 063 out.writeByte(super.getOpcode()); 064 out.writeByte(type); 065 } 066 067 068 /** 069 * @return numeric code for basic element type 070 */ 071 public final byte getTypecode() { 072 return type; 073 } 074 075 076 /** 077 * @return type of constructed array 078 */ 079 public final Type getType() { 080 return new ArrayType(BasicType.getType(type), 1); 081 } 082 083 084 /** 085 * @return mnemonic for instruction 086 */ 087 @Override 088 public String toString( final boolean verbose ) { 089 return super.toString(verbose) + " " + org.apache.bcel.Const.getTypeName(type); 090 } 091 092 093 /** 094 * Read needed data (e.g. index) from file. 095 */ 096 @Override 097 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 098 type = bytes.readByte(); 099 super.setLength(2); 100 } 101 102 103 @Override 104 public Class<?>[] getExceptions() { 105 return new Class[] { 106 ExceptionConst.NEGATIVE_ARRAY_SIZE_EXCEPTION 107 }; 108 } 109 110 111 /** 112 * Call corresponding visitor method(s). The order is: 113 * Call visitor methods of implemented interfaces first, then 114 * call methods according to the class hierarchy in descending order, 115 * i.e., the most specific visitXXX() call comes last. 116 * 117 * @param v Visitor object 118 */ 119 @Override 120 public void accept( final Visitor v ) { 121 v.visitAllocationInstruction(this); 122 v.visitExceptionThrower(this); 123 v.visitStackProducer(this); 124 v.visitNEWARRAY(this); 125 } 126}