io.etcd.jetcd.op.CmpTarget Maven / Gradle / Ivy
/*
* Copyright 2016-2021 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.op;
import com.google.protobuf.ByteString;
import io.etcd.jetcd.ByteSequence;
import io.etcd.jetcd.api.Compare;
/**
* Cmp target used in {@link io.etcd.jetcd.Txn}.
*/
public abstract class CmpTarget {
/**
* Cmp on a given version.
*
* @param version version to compare
* @return the version compare target
*/
public static VersionCmpTarget version(long version) {
return new VersionCmpTarget(version);
}
/**
* Cmp on the create revision.
*
* @param revision the create revision
* @return the create revision compare target
*/
public static CreateRevisionCmpTarget createRevision(long revision) {
return new CreateRevisionCmpTarget(revision);
}
/**
* Cmp on the modification revision.
*
* @param revision the modification revision
* @return the modification revision compare target
*/
public static ModRevisionCmpTarget modRevision(long revision) {
return new ModRevisionCmpTarget(revision);
}
/**
* Cmp on the value.
*
* @param value the value to compare
* @return the value compare target
*/
public static ValueCmpTarget value(ByteSequence value) {
return new ValueCmpTarget(ByteString.copyFrom(value.getBytes()));
}
private final Compare.CompareTarget target;
private final T targetValue;
protected CmpTarget(Compare.CompareTarget target, T targetValue) {
this.target = target;
this.targetValue = targetValue;
}
/**
* Get the compare target used for this compare.
*
* @return the compare target used for this compare
*/
public Compare.CompareTarget getTarget() {
return target;
}
/**
* Get the compare target value of this compare.
*
* @return the compare target value of this compare.
*/
public T getTargetValue() {
return targetValue;
}
public static final class VersionCmpTarget extends CmpTarget {
VersionCmpTarget(Long targetValue) {
super(Compare.CompareTarget.VERSION, targetValue);
}
}
public static final class CreateRevisionCmpTarget extends CmpTarget {
CreateRevisionCmpTarget(Long targetValue) {
super(Compare.CompareTarget.CREATE, targetValue);
}
}
public static final class ModRevisionCmpTarget extends CmpTarget {
ModRevisionCmpTarget(Long targetValue) {
super(Compare.CompareTarget.MOD, targetValue);
}
}
public static final class ValueCmpTarget extends CmpTarget {
ValueCmpTarget(ByteString targetValue) {
super(Compare.CompareTarget.VALUE, targetValue);
}
}
}