io.etcd.jetcd.options.OptionsUtil Maven / Gradle / Ivy
/**
* Copyright 2017 The jetcd authors
*
* 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 io.etcd.jetcd.options;
import io.etcd.jetcd.ByteSequence;
import io.etcd.jetcd.api.RangeRequest;
import io.etcd.jetcd.options.GetOption.SortOrder;
import io.etcd.jetcd.options.GetOption.SortTarget;
import java.util.Arrays;
public class OptionsUtil {
private static final byte[] NO_PREFIX_END = {0};
private OptionsUtil() {
}
/**
* Gets the range end of the given prefix.
*
* The range end is the key plus one (e.g., "aa"+1 == "ab", "a\xff"+1 == "b").
*
* @param prefix the given prefix
* @return the range end of the given prefix
*/
static final ByteSequence prefixEndOf(ByteSequence prefix) {
byte[] endKey = prefix.getBytes().clone();
for (int i = endKey.length - 1; i >= 0; i--) {
if (endKey[i] < 0xff) {
endKey[i] = (byte) (endKey[i] + 1);
return ByteSequence.from(Arrays.copyOf(endKey, i + 1));
}
}
return ByteSequence.from(NO_PREFIX_END);
}
/**
* convert client SortOrder to apu SortOrder.
*/
public static RangeRequest.SortOrder toRangeRequestSortOrder(SortOrder order) {
switch (order) {
case NONE:
return RangeRequest.SortOrder.NONE;
case ASCEND:
return RangeRequest.SortOrder.ASCEND;
case DESCEND:
return RangeRequest.SortOrder.DESCEND;
default:
return RangeRequest.SortOrder.UNRECOGNIZED;
}
}
/**
* convert client SortTarget to apu SortTarget.
*/
public static RangeRequest.SortTarget toRangeRequestSortTarget(SortTarget target) {
switch (target) {
case KEY:
return RangeRequest.SortTarget.KEY;
case CREATE:
return RangeRequest.SortTarget.CREATE;
case MOD:
return RangeRequest.SortTarget.MOD;
case VALUE:
return RangeRequest.SortTarget.VALUE;
case VERSION:
return RangeRequest.SortTarget.VERSION;
default:
return RangeRequest.SortTarget.UNRECOGNIZED;
}
}
}