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
|
/*
* 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.info;
/**
* Describes a property sorting direction.
*
* @author Brian S O'Neill
*/
public enum Direction {
ASCENDING('+'), DESCENDING('-'), UNSPECIFIED('~');
private char mCharValue;
private Direction(char charValue) {
mCharValue = charValue;
}
/**
* Returns the reverse direction of this.
*/
public Direction reverse() {
if (this == ASCENDING) {
return DESCENDING;
} else if (this == DESCENDING) {
return ASCENDING;
}
return this;
}
/**
* Returns '+' for ASCENDING, '-' for DESCENDING, and '~' for UNSPECIFIED.
*/
public char toCharacter() {
return mCharValue;
}
/**
* Returns ASCENDING for '+', DESCENDING for '-', UNSPECIFIED for anything
* else.
*/
public static Direction fromCharacter(char c) {
if (c == '+') {
return ASCENDING;
}
if (c == '-') {
return DESCENDING;
}
return UNSPECIFIED;
}
}
|
