1 /* 2 * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.bcel.internal.generic; 22 23 import java.io.DataOutputStream; 24 import java.io.IOException; 25 26 import com.sun.org.apache.bcel.internal.ExceptionConst; 27 import com.sun.org.apache.bcel.internal.util.ByteSequence; 28 29 /** 30 * NEWARRAY - Create new array of basic type (int, short, ...) 31 * <PRE>Stack: ..., count -> ..., arrayref</PRE> 32 * type must be one of T_INT, T_SHORT, ... 33 * 34 * @LastModified: Jan 2020 35 */ 36 public class NEWARRAY extends Instruction implements AllocationInstruction, ExceptionThrower, 37 StackProducer { 38 39 private byte type; 40 41 42 /** 43 * Empty constructor needed for Instruction.readInstruction. 44 * Not to be used otherwise. 45 */ NEWARRAY()46 NEWARRAY() { 47 } 48 49 NEWARRAY(final byte type)50 public NEWARRAY(final byte type) { 51 super(com.sun.org.apache.bcel.internal.Const.NEWARRAY, (short) 2); 52 this.type = type; 53 } 54 55 NEWARRAY(final BasicType type)56 public NEWARRAY(final BasicType type) { 57 this(type.getType()); 58 } 59 60 61 /** 62 * Dump instruction as byte code to stream out. 63 * @param out Output stream 64 */ 65 @Override dump( final DataOutputStream out )66 public void dump( final DataOutputStream out ) throws IOException { 67 out.writeByte(super.getOpcode()); 68 out.writeByte(type); 69 } 70 71 72 /** 73 * @return numeric code for basic element type 74 */ getTypecode()75 public final byte getTypecode() { 76 return type; 77 } 78 79 80 /** 81 * @return type of constructed array 82 */ getType()83 public final Type getType() { 84 return new ArrayType(BasicType.getType(type), 1); 85 } 86 87 88 /** 89 * @return mnemonic for instruction 90 */ 91 @Override toString( final boolean verbose )92 public String toString( final boolean verbose ) { 93 return super.toString(verbose) + " " + com.sun.org.apache.bcel.internal.Const.getTypeName(type); 94 } 95 96 97 /** 98 * Read needed data (e.g. index) from file. 99 */ 100 @Override initFromFile( final ByteSequence bytes, final boolean wide )101 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 102 type = bytes.readByte(); 103 super.setLength(2); 104 } 105 106 107 @Override getExceptions()108 public Class<?>[] getExceptions() { 109 return new Class<?>[] { 110 ExceptionConst.NEGATIVE_ARRAY_SIZE_EXCEPTION 111 }; 112 } 113 114 115 /** 116 * Call corresponding visitor method(s). The order is: 117 * Call visitor methods of implemented interfaces first, then 118 * call methods according to the class hierarchy in descending order, 119 * i.e., the most specific visitXXX() call comes last. 120 * 121 * @param v Visitor object 122 */ 123 @Override accept( final Visitor v )124 public void accept( final Visitor v ) { 125 v.visitAllocationInstruction(this); 126 v.visitExceptionThrower(this); 127 v.visitStackProducer(this); 128 v.visitNEWARRAY(this); 129 } 130 } 131