org.apache.flink.runtime.state.heap.KeyContextImpl Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.flink.runtime.state.heap;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.runtime.state.KeyGroupRange;
import org.apache.flink.runtime.state.KeyGroupRangeAssignment;
import org.apache.flink.runtime.state.heap.InternalKeyContext;
/**
* Implementation of {@link org.apache.flink.runtime.state.heap.InternalKeyContext}.
*/
public class KeyContextImpl implements InternalKeyContext {
/** The serializer for the keys. */
private final TypeSerializer keySerializer;
/** The number of key groups. */
private final int numberOfKeyGroups;
/** The key group assigned to this task. */
private final KeyGroupRange keyGroupRange;
/** The current key. */
private K currentKey;
public KeyContextImpl(
TypeSerializer keySerializer,
int numberOfKeyGroups,
KeyGroupRange keyGroupRange) {
this.keySerializer = keySerializer;
this.numberOfKeyGroups = numberOfKeyGroups;
this.keyGroupRange = keyGroupRange;
}
/**
* Sets the current key that is used for partitioned state.
* @param newKey The new current key.
*/
public void setCurrentKey(K newKey) {
this.currentKey = newKey;
}
@Override
public K getCurrentKey() {
return currentKey;
}
@Override
public int getCurrentKeyGroupIndex() {
return KeyGroupRangeAssignment.assignToKeyGroup(currentKey, numberOfKeyGroups);
}
@Override
public int getNumberOfKeyGroups() {
return numberOfKeyGroups;
}
@Override
public KeyGroupRange getKeyGroupRange() {
return keyGroupRange;
}
@Override
public TypeSerializer getKeySerializer() {
return keySerializer;
}
}