1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 package com.sun.org.apache.bcel.internal.generic; 6 7 /* ==================================================================== 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 2001 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, 26 * if any, must include the following acknowledgment: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowledgment may appear in the software itself, 30 * if and wherever such third-party acknowledgments normally appear. 31 * 32 * 4. The names "Apache" and "Apache Software Foundation" and 33 * "Apache BCEL" must not be used to endorse or promote products 34 * derived from this software without prior written permission. For 35 * written permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache", 38 * "Apache BCEL", nor may "Apache" appear in their name, without 39 * prior written permission of the Apache Software Foundation. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>. 59 */ 60 import java.io.*; 61 import com.sun.org.apache.bcel.internal.util.ByteSequence; 62 import com.sun.org.apache.bcel.internal.classfile.ConstantPool; 63 import com.sun.org.apache.bcel.internal.ExceptionConstants; 64 65 /** 66 * MULTIANEWARRAY - Create new mutidimensional array of references 67 * <PRE>Stack: ..., count1, [count2, ...] -> ..., arrayref</PRE> 68 * 69 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 70 */ 71 public class MULTIANEWARRAY extends CPInstruction implements LoadClass, AllocationInstruction, ExceptionThrower { 72 private short dimensions; 73 74 /** 75 * Empty constructor needed for the Class.newInstance() statement in 76 * Instruction.readInstruction(). Not to be used otherwise. 77 */ 78 MULTIANEWARRAY() {} 79 80 public MULTIANEWARRAY(int index, short dimensions) { 81 super(com.sun.org.apache.bcel.internal.Constants.MULTIANEWARRAY, index); 82 83 if(dimensions < 1) 84 throw new ClassGenException("Invalid dimensions value: " + dimensions); 85 86 this.dimensions = dimensions; 87 length = 4; 88 } 89 90 /** 91 * Dump instruction as byte code to stream out. 92 * @param out Output stream 93 */ 94 public void dump(DataOutputStream out) throws IOException { 95 out.writeByte(opcode); 96 out.writeShort(index); 97 out.writeByte(dimensions); 98 } 99 100 /** 101 * Read needed data (i.e., no. dimension) from file. 102 */ 103 protected void initFromFile(ByteSequence bytes, boolean wide) 104 throws IOException 105 { 106 super.initFromFile(bytes, wide); 107 dimensions = bytes.readByte(); 108 length = 4; 109 } 110 111 /** 112 * @return number of dimensions to be created 113 */ 114 public final short getDimensions() { return dimensions; } 115 116 /** 117 * @return mnemonic for instruction 118 */ 119 public String toString(boolean verbose) { 120 return super.toString(verbose) + " " + index + " " + dimensions; 121 } 122 123 /** 124 * @return mnemonic for instruction with symbolic references resolved 125 */ 126 public String toString(ConstantPool cp) { 127 return super.toString(cp) + " " + dimensions; 128 } 129 130 /** 131 * Also works for instructions whose stack effect depends on the 132 * constant pool entry they reference. 133 * @return Number of words consumed from stack by this instruction 134 */ 135 public int consumeStack(ConstantPoolGen cpg) { return dimensions; } 136 137 public Class[] getExceptions() { 138 Class[] cs = new Class[2 + ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length]; 139 140 System.arraycopy(ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION, 0, 141 cs, 0, ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length); 142 143 cs[ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length+1] = ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION; 144 cs[ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length] = ExceptionConstants.ILLEGAL_ACCESS_ERROR; 145 146 return cs; 147 } 148 149 public ObjectType getLoadClassType(ConstantPoolGen cpg) { 150 Type t = getType(cpg); 151 152 if (t instanceof ArrayType){ 153 t = ((ArrayType) t).getBasicType(); 154 } 155 156 return (t instanceof ObjectType)? (ObjectType) t : null; 157 } 158 159 /** 160 * Call corresponding visitor method(s). The order is: 161 * Call visitor methods of implemented interfaces first, then 162 * call methods according to the class hierarchy in descending order, 163 * i.e., the most specific visitXXX() call comes last. 164 * 165 * @param v Visitor object 166 */ 167 public void accept(Visitor v) { 168 v.visitLoadClass(this); 169 v.visitAllocationInstruction(this); 170 v.visitExceptionThrower(this); 171 v.visitTypedInstruction(this); 172 v.visitCPInstruction(this); 173 v.visitMULTIANEWARRAY(this); 174 } 175 }