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