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 * @version $Id: NEWARRAY.java 1747278 2016-06-07 17:28:43Z britter $ 032 */ 033public class NEWARRAY extends Instruction implements AllocationInstruction, ExceptionThrower, 034 StackProducer { 035 036 private byte type; 037 038 039 /** 040 * Empty constructor needed for the Class.newInstance() statement in 041 * Instruction.readInstruction(). Not to be used otherwise. 042 */ 043 NEWARRAY() { 044 } 045 046 047 public NEWARRAY(final byte type) { 048 super(org.apache.bcel.Const.NEWARRAY, (short) 2); 049 this.type = type; 050 } 051 052 053 public NEWARRAY(final BasicType type) { 054 this(type.getType()); 055 } 056 057 058 /** 059 * Dump instruction as byte code to stream out. 060 * @param out Output stream 061 */ 062 @Override 063 public void dump( final DataOutputStream out ) throws IOException { 064 out.writeByte(super.getOpcode()); 065 out.writeByte(type); 066 } 067 068 069 /** 070 * @return numeric code for basic element type 071 */ 072 public final byte getTypecode() { 073 return type; 074 } 075 076 077 /** 078 * @return type of constructed array 079 */ 080 public final Type getType() { 081 return new ArrayType(BasicType.getType(type), 1); 082 } 083 084 085 /** 086 * @return mnemonic for instruction 087 */ 088 @Override 089 public String toString( final boolean verbose ) { 090 return super.toString(verbose) + " " + org.apache.bcel.Const.getTypeName(type); 091 } 092 093 094 /** 095 * Read needed data (e.g. index) from file. 096 */ 097 @Override 098 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 099 type = bytes.readByte(); 100 super.setLength(2); 101 } 102 103 104 @Override 105 public Class<?>[] getExceptions() { 106 return new Class[] { 107 ExceptionConst.NEGATIVE_ARRAY_SIZE_EXCEPTION 108 }; 109 } 110 111 112 /** 113 * Call corresponding visitor method(s). The order is: 114 * Call visitor methods of implemented interfaces first, then 115 * call methods according to the class hierarchy in descending order, 116 * i.e., the most specific visitXXX() call comes last. 117 * 118 * @param v Visitor object 119 */ 120 @Override 121 public void accept( final Visitor v ) { 122 v.visitAllocationInstruction(this); 123 v.visitExceptionThrower(this); 124 v.visitStackProducer(this); 125 v.visitNEWARRAY(this); 126 } 127}