/*
* 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.streaming.api.datastream;
/**
* For specifying what type of window operator was used to create the state
* that a {@link org.apache.flink.streaming.runtime.operators.windowing.WindowOperator}
* is restoring from. This is used to signal that state written using an aligned processing-time
* window operator should be restored.
*/
public enum LegacyWindowOperatorType {
FAST_ACCUMULATING(true, false),
FAST_AGGREGATING(false, true),
NONE(false, false);
// ------------------------------------------------------------------------
private final boolean fastAccumulating;
private final boolean fastAggregating;
LegacyWindowOperatorType(boolean fastAccumulating, boolean fastAggregating) {
this.fastAccumulating = fastAccumulating;
this.fastAggregating = fastAggregating;
}
public boolean isFastAccumulating() {
return fastAccumulating;
}
public boolean isFastAggregating() {
return fastAggregating;
}
@Override
public String toString() {
if (fastAccumulating) {
return "AccumulatingProcessingTimeWindowOperator";
} else if (fastAggregating) {
return "AggregatingProcessingTimeWindowOperator";
} else {
return "WindowOperator";
}
}
}