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 /**
22 * LCONST - Push 0 or 1, other values cause an exception
23 *
24 * <PRE>
25 * Stack: ... -> ...,
26 * </PRE>
27 */
28 public class LCONST extends Instruction implements ConstantPushInstruction {
29
30 private final long value;
31
32 /**
33 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
34 */
35 LCONST() {
36 this(0);
37 }
38
39 public LCONST(final long l) {
40 super(org.apache.bcel.Const.LCONST_0, (short) 1);
41 if (l == 0) {
42 super.setOpcode(org.apache.bcel.Const.LCONST_0);
43 } else if (l == 1) {
44 super.setOpcode(org.apache.bcel.Const.LCONST_1);
45 } else {
46 throw new ClassGenException("LCONST can be used only for 0 and 1: " + l);
47 }
48 value = l;
49 }
50
51 /**
52 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
53 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
54 *
55 * @param v Visitor object
56 */
57 @Override
58 public void accept(final Visitor v) {
59 v.visitPushInstruction(this);
60 v.visitStackProducer(this);
61 v.visitTypedInstruction(this);
62 v.visitConstantPushInstruction(this);
63 v.visitLCONST(this);
64 }
65
66 /**
67 * @return Type.LONG
68 */
69 @Override
70 public Type getType(final ConstantPoolGen cp) {
71 return Type.LONG;
72 }
73
74 @Override
75 public Number getValue() {
76 return Long.valueOf(value);
77 }
78 }