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1 package org.apache.bcel.generic; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 import java.io.*; 57 import org.apache.bcel.util.ByteSequence; 58 59 /*** 60 * NEWARRAY - Create new array of basic type (int, short, ...) 61 * <PRE>Stack: ..., count -> ..., arrayref</PRE> 62 * type must be one of T_INT, T_SHORT, ... 63 * 64 * @version $Id: NEWARRAY.java,v 1.2 2002/08/07 18:01:32 mdahm Exp $ 65 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 66 */ 67 public class NEWARRAY extends Instruction 68 implements AllocationInstruction, ExceptionThrower, StackProducer { 69 private byte type; 70 71 /*** 72 * Empty constructor needed for the Class.newInstance() statement in 73 * Instruction.readInstruction(). Not to be used otherwise. 74 */ 75 NEWARRAY() {} 76 77 public NEWARRAY(byte type) { 78 super(org.apache.bcel.Constants.NEWARRAY, (short)2); 79 this.type = type; 80 } 81 82 public NEWARRAY(BasicType type) { 83 this(type.getType()); 84 } 85 86 /*** 87 * Dump instruction as byte code to stream out. 88 * @param out Output stream 89 */ 90 public void dump(DataOutputStream out) throws IOException { 91 out.writeByte(opcode); 92 out.writeByte(type); 93 } 94 95 /*** 96 * @return numeric code for basic element type 97 */ 98 public final byte getTypecode() { return type; } 99 100 /*** 101 * @return type of constructed array 102 */ 103 public final Type getType() { 104 return new ArrayType(BasicType.getType(type), 1); 105 } 106 107 /*** 108 * @return mnemonic for instruction 109 */ 110 public String toString(boolean verbose) { 111 return super.toString(verbose) + " " + org.apache.bcel.Constants.TYPE_NAMES[type]; 112 } 113 /*** 114 * Read needed data (e.g. index) from file. 115 */ 116 protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException 117 { 118 type = bytes.readByte(); 119 length = 2; 120 } 121 122 public Class[] getExceptions() { 123 return new Class[] { org.apache.bcel.ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION }; 124 } 125 126 /*** 127 * Call corresponding visitor method(s). The order is: 128 * Call visitor methods of implemented interfaces first, then 129 * call methods according to the class hierarchy in descending order, 130 * i.e., the most specific visitXXX() call comes last. 131 * 132 * @param v Visitor object 133 */ 134 public void accept(Visitor v) { 135 v.visitAllocationInstruction(this); 136 v.visitExceptionThrower(this); 137 v.visitStackProducer(this); 138 v.visitNEWARRAY(this); 139 } 140 }

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