1/*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5/*
6 * Licensed to the Apache Software Foundation (ASF) under one or more
7 * contributor license agreements.  See the NOTICE file distributed with
8 * this work for additional information regarding copyright ownership.
9 * The ASF licenses this file to You under the Apache License, Version 2.0
10 * (the "License"); you may not use this file except in compliance with
11 * the License.  You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21
22package com.sun.org.apache.bcel.internal.generic;
23
24
25/**
26 * FCONST - Push 0.0, 1.0 or 2.0, other values cause an exception
27 *
28 * <PRE>Stack: ... -&gt; ..., </PRE>
29 *
30 * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
31 */
32public class FCONST extends Instruction
33  implements ConstantPushInstruction, TypedInstruction {
34  private float value;
35
36  /**
37   * Empty constructor needed for the Class.newInstance() statement in
38   * Instruction.readInstruction(). Not to be used otherwise.
39   */
40  FCONST() {}
41
42  public FCONST(float f) {
43    super(com.sun.org.apache.bcel.internal.Constants.FCONST_0, (short)1);
44
45    if(f == 0.0)
46      opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_0;
47    else if(f == 1.0)
48      opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_1;
49    else if(f == 2.0)
50      opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_2;
51    else
52      throw new ClassGenException("FCONST can be used only for 0.0, 1.0 and 2.0: " + f);
53
54    value = f;
55  }
56
57  public Number getValue() { return new Float(value); }
58
59  /** @return Type.FLOAT
60   */
61  public Type getType(ConstantPoolGen cp) {
62    return Type.FLOAT;
63  }
64
65  /**
66   * Call corresponding visitor method(s). The order is:
67   * Call visitor methods of implemented interfaces first, then
68   * call methods according to the class hierarchy in descending order,
69   * i.e., the most specific visitXXX() call comes last.
70   *
71   * @param v Visitor object
72   */
73  public void accept(Visitor v) {
74    v.visitPushInstruction(this);
75    v.visitStackProducer(this);
76    v.visitTypedInstruction(this);
77    v.visitConstantPushInstruction(this);
78    v.visitFCONST(this);
79  }
80}
81