forked from openjdk/jdk
/
DoubleDV.java
259 lines (234 loc) · 9.85 KB
/
DoubleDV.java
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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package com.sun.org.apache.xerces.internal.impl.dv.xs;
import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.ValidationContext;
import com.sun.org.apache.xerces.internal.xs.datatypes.XSDouble;
/**
* Represent the schema type "double"
*
* @xerces.internal
*
* @author Neeraj Bajaj, Sun Microsystems, inc.
* @author Sandy Gao, IBM
*
*/
public class DoubleDV extends TypeValidator {
public short getAllowedFacets(){
return ( XSSimpleTypeDecl.FACET_PATTERN | XSSimpleTypeDecl.FACET_WHITESPACE | XSSimpleTypeDecl.FACET_ENUMERATION |XSSimpleTypeDecl.FACET_MAXINCLUSIVE |XSSimpleTypeDecl.FACET_MININCLUSIVE | XSSimpleTypeDecl.FACET_MAXEXCLUSIVE | XSSimpleTypeDecl.FACET_MINEXCLUSIVE );
}//getAllowedFacets()
//convert a String to Double form, we have to take care of cases specified in spec like INF, -INF and NaN
public Object getActualValue(String content, ValidationContext context) throws InvalidDatatypeValueException {
try{
return new XDouble(content);
} catch (NumberFormatException ex){
throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1", new Object[]{content, "double"});
}
}//getActualValue()
// Can't call Double#compareTo method, because it's introduced in jdk 1.2
public int compare(Object value1, Object value2) {
return ((XDouble)value1).compareTo((XDouble)value2);
}//compare()
//distinguishes between identity and equality for double datatype
//0.0 is equal but not identical to -0.0
public boolean isIdentical (Object value1, Object value2) {
if (value2 instanceof XDouble) {
return ((XDouble)value1).isIdentical((XDouble)value2);
}
return false;
}//isIdentical()
/**
* Returns true if it's possible that the given
* string represents a valid floating point value
* (excluding NaN, INF and -INF).
*/
static boolean isPossibleFP(String val) {
final int length = val.length();
for (int i = 0; i < length; ++i) {
char c = val.charAt(i);
if (!(c >= '0' && c <= '9' || c == '.' ||
c == '-' || c == '+' || c == 'E' || c == 'e')) {
return false;
}
}
return true;
}
private static final class XDouble implements XSDouble {
private final double value;
public XDouble(String s) throws NumberFormatException {
if (isPossibleFP(s)) {
value = Double.parseDouble(s);
}
else if ( s.equals("INF") ) {
value = Double.POSITIVE_INFINITY;
}
else if ( s.equals("-INF") ) {
value = Double.NEGATIVE_INFINITY;
}
else if ( s.equals("NaN" ) ) {
value = Double.NaN;
}
else {
throw new NumberFormatException(s);
}
}
public boolean equals(Object val) {
if (val == this)
return true;
if (!(val instanceof XDouble))
return false;
XDouble oval = (XDouble)val;
// NOTE: we don't distinguish 0.0 from -0.0
if (value == oval.value)
return true;
if (value != value && oval.value != oval.value)
return true;
return false;
}
public int hashCode() {
// This check is necessary because doubleToLongBits(+0) != doubleToLongBits(-0)
if (value == 0d) {
return 0;
}
return Double.hashCode(value);
}
// NOTE: 0.0 is equal but not identical to -0.0
public boolean isIdentical (XDouble val) {
if (val == this) {
return true;
}
if (value == val.value) {
return (value != 0.0d ||
(Double.doubleToLongBits(value) == Double.doubleToLongBits(val.value)));
}
if (value != value && val.value != val.value)
return true;
return false;
}
private int compareTo(XDouble val) {
double oval = val.value;
// this < other
if (value < oval)
return -1;
// this > other
if (value > oval)
return 1;
// this == other
// NOTE: we don't distinguish 0.0 from -0.0
if (value == oval)
return 0;
// one of the 2 values or both is/are NaN(s)
if (value != value) {
// this = NaN = other
if (oval != oval)
return 0;
// this is NaN <> other
return INDETERMINATE;
}
// other is NaN <> this
return INDETERMINATE;
}
private String canonical;
public synchronized String toString() {
if (canonical == null) {
if (value == Double.POSITIVE_INFINITY)
canonical = "INF";
else if (value == Double.NEGATIVE_INFINITY)
canonical = "-INF";
else if (value != value)
canonical = "NaN";
// NOTE: we don't distinguish 0.0 from -0.0
else if (value == 0)
canonical = "0.0E1";
else {
// REVISIT: use the java algorithm for now, because we
// don't know what to output for 1.1d (which is no
// actually 1.1)
canonical = Double.toString(value);
// if it contains 'E', then it should be a valid schema
// canonical representation
if (canonical.indexOf('E') == -1) {
int len = canonical.length();
// at most 3 longer: E, -, 9
char[] chars = new char[len+3];
canonical.getChars(0, len, chars, 0);
// expected decimal point position
int edp = chars[0] == '-' ? 2 : 1;
// for non-zero integer part
if (value >= 1 || value <= -1) {
// decimal point position
int dp = canonical.indexOf('.');
// move the digits: ddd.d --> d.ddd
for (int i = dp; i > edp; i--) {
chars[i] = chars[i-1];
}
chars[edp] = '.';
// trim trailing zeros: d00.0 --> d.000 --> d.
while (chars[len-1] == '0')
len--;
// add the last zero if necessary: d. --> d.0
if (chars[len-1] == '.')
len++;
// append E: d.dd --> d.ddE
chars[len++] = 'E';
// how far we shifted the decimal point
int shift = dp - edp;
// append the exponent --> d.ddEd
// the exponent is at most 7
chars[len++] = (char)(shift + '0');
}
else {
// non-zero digit point
int nzp = edp + 1;
// skip zeros: 0.003
while (chars[nzp] == '0')
nzp++;
// put the first non-zero digit to the left of '.'
chars[edp-1] = chars[nzp];
chars[edp] = '.';
// move other digits (non-zero) to the right of '.'
for (int i = nzp+1, j = edp+1; i < len; i++, j++)
chars[j] = chars[i];
// adjust the length
len -= nzp - edp;
// append 0 if nessary: 0.03 --> 3. --> 3.0
if (len == edp + 1)
chars[len++] = '0';
// append E-: d.dd --> d.ddE-
chars[len++] = 'E';
chars[len++] = '-';
// how far we shifted the decimal point
int shift = nzp - edp;
// append the exponent --> d.ddEd
// the exponent is at most 3
chars[len++] = (char)(shift + '0');
}
canonical = new String(chars, 0, len);
}
}
}
return canonical;
}
public double getValue() {
return value;
}
}
} // class DoubleDV