1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 package org.apache.bcel.generic; 19 20 import java.io.DataOutputStream; 21 import java.io.IOException; 22 23 import org.apache.bcel.ExceptionConst; 24 import org.apache.bcel.util.ByteSequence; 25 26 /** 27 * NEWARRAY - Create new array of basic type (int, short, ...) 28 * <PRE>Stack: ..., count -> ..., arrayref</PRE> 29 * type must be one of T_INT, T_SHORT, ... 30 * 31 * @version $Id$ 32 */ 33 public class NEWARRAY extends Instruction implements AllocationInstruction, ExceptionThrower, 34 StackProducer { 35 36 private byte type; 37 38 39 /** 40 * Empty constructor needed for Instruction.readInstruction. 41 * Not to be used otherwise. 42 */ 43 NEWARRAY() { 44 } 45 46 47 public NEWARRAY(final byte type) { 48 super(org.apache.bcel.Const.NEWARRAY, (short) 2); 49 this.type = type; 50 } 51 52 53 public NEWARRAY(final BasicType type) { 54 this(type.getType()); 55 } 56 57 58 /** 59 * Dump instruction as byte code to stream out. 60 * @param out Output stream 61 */ 62 @Override 63 public void dump( final DataOutputStream out ) throws IOException { 64 out.writeByte(super.getOpcode()); 65 out.writeByte(type); 66 } 67 68 69 /** 70 * @return numeric code for basic element type 71 */ 72 public final byte getTypecode() { 73 return type; 74 } 75 76 77 /** 78 * @return type of constructed array 79 */ 80 public final Type getType() { 81 return new ArrayType(BasicType.getType(type), 1); 82 } 83 84 85 /** 86 * @return mnemonic for instruction 87 */ 88 @Override 89 public String toString( final boolean verbose ) { 90 return super.toString(verbose) + " " + org.apache.bcel.Const.getTypeName(type); 91 } 92 93 94 /** 95 * Read needed data (e.g. index) from file. 96 */ 97 @Override 98 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 99 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 } 128