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Java > Open Source Codes > org > apache > derby > iapi > services > classfile > CONSTANT_Double_info


1 /*
2
3    Derby - Class org.apache.derby.iapi.services.classfile.CONSTANT_Double_info
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
22 package org.apache.derby.iapi.services.classfile;
23
24 import org.apache.derby.iapi.services.classfile.VMDescriptor;
25
26 import java.io.IOException JavaDoc;
27
28 /** Double Constant - page 97 - Section 4.4.5 */
29 final class CONSTANT_Double_info extends ConstantPoolEntry {
30     private final double value;
31
32     CONSTANT_Double_info(double value) {
33         super(VMDescriptor.CONSTANT_Double);
34         doubleSlot = true; //See page 98.
35 this.value = value;
36     }
37
38     public int hashCode() {
39         return (int) value;
40     }
41
42     int classFileSize() {
43         // 1 (tag) + 8 (double length)
44 return 1 + 8;
45     }
46     void put(ClassFormatOutput out) throws IOException JavaDoc {
47         super.put(out);
48         out.writeDouble(value);
49     }
50
51     public boolean equals(Object JavaDoc other) {
52
53         // check it is the right type
54 if (other instanceof CONSTANT_Double_info) {
55         
56             return value == ((CONSTANT_Double_info) other).value;
57         }
58
59         return false;
60     }
61 }
62
63
64
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