blob: 8e50755f8008ac006b286a784427343dd43fd880 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2000-2021. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
package com.ericsson.otp.erlang;
/**
* Provides a Java representation of Erlang floats and doubles. Erlang defines
* only one floating point numeric type, however this class and its subclass
* {@link OtpErlangFloat} are used to provide representations corresponding to
* the Java types Double and Float.
*/
public class OtpErlangDouble extends OtpErlangObject {
// don't change this!
private static final long serialVersionUID = 132947104811974021L;
private final double d;
/**
* Create an Erlang float from the given double value.
*/
public OtpErlangDouble(final double d) {
this.d = d;
}
/**
* Create an Erlang float from a stream containing a double encoded in
* Erlang external format.
*
* @param buf
* the stream containing the encoded value.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang float.
*/
public OtpErlangDouble(final OtpInputStream buf)
throws OtpErlangDecodeException {
d = buf.read_double();
}
/**
* Get the value, as a double.
*
* @return the value of this object, as a double.
*/
public double doubleValue() {
return d;
}
/**
* Get the value, as a float.
*
* @return the value of this object, as a float.
*
* @exception OtpErlangRangeException
* if the value cannot be represented as a float.
*/
public float floatValue() throws OtpErlangRangeException {
final float f = (float) d;
if (f != d) {
throw new OtpErlangRangeException("Value too large for float: " + d);
}
return f;
}
/**
* Get the string representation of this double.
*
* @return the string representation of this double.
*/
@Override
public String toString() {
return "" + d;
}
/**
* Convert this double to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded value should be written.
*/
@Override
public void encode(final OtpOutputStream buf) {
buf.write_double(d);
}
/**
* Determine if two floats are equal. Floats are equal if they contain the
* same value.
*
* @param o
* the float to compare to.
*
* @return true if the floats have the same value.
*/
@Override
public boolean equals(final Object o) {
if (!(o instanceof OtpErlangDouble)) {
return false;
}
final OtpErlangDouble other = (OtpErlangDouble) o;
return d == other.d;
}
@Override
protected int doHashCode() {
final Double v = Double.valueOf(d);
return v.hashCode();
}
}
|
