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/*
* Copyright 2006 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;
}
}
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