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
|
/*
* Copyright 2006-2012 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. 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.
*/
package com.amazon.carbonado.constraint;
import java.lang.annotation.*;
import java.util.Arrays;
import com.amazon.carbonado.MalformedTypeException;
/**
* Limits the value of a property to be a member of a specific set. The
* property value may be a boxed or unboxed float, double, String,
* CharSequence, char, Character, or character array. If the property value is
* outside the set, an IllegalArgumentException is thrown.
*
* <p>Example:<pre>
* public interface PolarCoordinate extends Storable {
* double getTheta();
* <b>@FloatConstraint(min=0, max=Math.PI * 2, disallowed=Double.NaN)</b>
* void setTheta(double radians);
*
* ...
* }
* </pre>
*
* @author Brian S O'Neill
* @see IntegerConstraint
* @see TextConstraint
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@ConstraintDefinition
public @interface FloatConstraint {
/**
* Specific allowed values for property. Default is unlimited.
*/
double[] allowed() default {};
/**
* Specific disallowed values for property. Default is none.
*/
double[] disallowed() default {};
/**
* Specify minimum allowed value for float/double property. Default is unlimited.
*/
double min() default Double.NEGATIVE_INFINITY;
/**
* Specify maximum allowed value for float/double property. Default is unlimited.
*/
double max() default Double.POSITIVE_INFINITY;
/**
* Constraint implementation for {@link FloatConstraint}.
*/
public static class Constraint {
private final String mPropertyName;
private final double mMinValue;
private final double mMaxValue;
/** Disallowed values, sorted for binary search. */
private final double[] mDisallowed;
/** Allowed values, sorted for binary search. */
private final double[] mAllowed;
/**
* @param type type of object that contains the constrained property
* @param propertyName name of property with constraint
* @param ann specific annotation that binds to this constraint class
*/
public Constraint(Class<?> type, String propertyName, FloatConstraint ann) {
this(type, propertyName,
ann.min(), ann.max(), ann.allowed(), ann.disallowed());
}
/**
* @param type type of object that contains the constrained property
* @param propertyName name of property with constraint
* @param min minimum allowed value
* @param max maximum allowed value
* @param allowed optional set of allowed values
* @param disallowed optional set of disallowed values
*/
public Constraint(Class<?> type, String propertyName,
double min, double max, double[] allowed, double[] disallowed) {
mPropertyName = propertyName;
mMinValue = min;
mMaxValue = max;
if (mMaxValue < mMinValue) {
throw new MalformedTypeException
(type, "Illegal range for float constraint on property \"" +
propertyName + "\": " + rangeString());
}
if (disallowed == null || disallowed.length == 0) {
disallowed = null;
} else {
disallowed = disallowed.clone();
Arrays.sort(disallowed);
}
if (allowed == null || allowed.length == 0) {
allowed = null;
} else {
allowed = allowed.clone();
Arrays.sort(allowed);
for (double value : allowed) {
if (value < mMinValue || value > mMaxValue ||
(disallowed != null && Arrays.binarySearch(disallowed, value) >= 0)) {
throw new MalformedTypeException
(type, "Allowed value contradiction for float constraint " +
"on property \"" + propertyName + "\": " + value);
}
}
// No need to have a set of disallowed values.
disallowed = null;
}
mDisallowed = disallowed;
mAllowed = allowed;
}
public void constrain(double propertyValue) {
if (propertyValue < mMinValue || propertyValue > mMaxValue) {
throw new IllegalArgumentException
("Value for \"" + mPropertyName + "\" must be in range " +
rangeString() + ": " + propertyValue);
}
if (mDisallowed != null && Arrays.binarySearch(mDisallowed, propertyValue) >= 0) {
throw new IllegalArgumentException
("Value for \"" + mPropertyName + "\" is disallowed: " + propertyValue);
}
if (mAllowed != null && Arrays.binarySearch(mAllowed, propertyValue) < 0) {
throw new IllegalArgumentException
("Value for \"" + mPropertyName + "\" is not allowed: " + propertyValue);
}
}
public void constrain(CharSequence propertyValue) {
if (propertyValue != null) {
try {
constrain(Double.parseDouble(propertyValue.toString()));
} catch (NumberFormatException e) {
throw new IllegalArgumentException
("Value for \"" + mPropertyName + "\" is not a number: " +
propertyValue);
}
}
}
public void constrain(char propertyValue) {
if ('0' <= propertyValue && propertyValue <= '9') {
constrain((double) (propertyValue - '0'));
} else {
throw new IllegalArgumentException
("Value for \"" + mPropertyName + "\" is not a number: " + propertyValue);
}
}
public void constrain(char[] propertyValue) {
if (propertyValue != null) {
constrain(new String(propertyValue));
}
}
private String rangeString() {
StringBuilder b = new StringBuilder();
b.append('(');
if (mMinValue > Double.MIN_VALUE) {
b.append(mMinValue);
}
b.append("..");
if (mMaxValue < Double.MAX_VALUE) {
b.append(mMaxValue);
}
b.append(')');
return b.toString();
}
}
}
|
