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 package org.apache.bcel.generic;
18
19 import java.io.DataOutputStream;
20 import java.io.IOException;
21
22 import org.apache.bcel.util.ByteSequence;
23
24 /**
25 * BIPUSH - Push byte on stack
26 *
27 * <PRE>
28 * Stack: ... -> ..., value
29 * </PRE>
30 */
31 public class BIPUSH extends Instruction implements ConstantPushInstruction {
32
33 private byte b;
34
35 /**
36 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
37 */
38 BIPUSH() {
39 }
40
41 /**
42 * Push byte on stack
43 */
44 public BIPUSH(final byte b) {
45 super(org.apache.bcel.Const.BIPUSH, (short) 2);
46 this.b = b;
47 }
48
49 /**
50 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
51 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
52 *
53 * @param v Visitor object
54 */
55 @Override
56 public void accept(final Visitor v) {
57 v.visitPushInstruction(this);
58 v.visitStackProducer(this);
59 v.visitTypedInstruction(this);
60 v.visitConstantPushInstruction(this);
61 v.visitBIPUSH(this);
62 }
63
64 /**
65 * Dump instruction as byte code to stream out.
66 */
67 @Override
68 public void dump(final DataOutputStream out) throws IOException {
69 super.dump(out);
70 out.writeByte(b);
71 }
72
73 /**
74 * @return Type.BYTE
75 */
76 @Override
77 public Type getType(final ConstantPoolGen cp) {
78 return Type.BYTE;
79 }
80
81 @Override
82 public Number getValue() {
83 return Integer.valueOf(b);
84 }
85
86 /**
87 * Read needed data (e.g. index) from file.
88 */
89 @Override
90 protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
91 super.setLength(2);
92 b = bytes.readByte();
93 }
94
95 /**
96 * @return mnemonic for instruction
97 */
98 @Override
99 public String toString(final boolean verbose) {
100 return super.toString(verbose) + " " + b;
101 }
102 }