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This module bridges Table/SQL API and runtime. It contains
all resources that are required during pre-flight and runtime
phase. The content of this module is work-in-progress. It will
replace flink-table-planner once it is stable. See FLINK-11439
and FLIP-32 for more details.
/*
* 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.table.planner.plan.logical;
import org.apache.flink.table.runtime.operators.window.slicing.SlicingWindowOperator;
import org.apache.flink.table.types.logical.LogicalType;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonProperty;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonTypeName;
import static org.apache.flink.util.Preconditions.checkArgument;
/**
* A windowing strategy that gets windows from input columns as window slice have been assigned and
* attached to the physical columns. The window slice is usually identified by slice end timestamp.
*
* @see SlicingWindowOperator for more details about which windows can apply slicing.
*/
@JsonTypeName("SliceAttached")
public class SliceAttachedWindowingStrategy extends WindowingStrategy {
public static final String FIELD_NAME_SLICE_END = "sliceEnd";
@JsonProperty(FIELD_NAME_SLICE_END)
private final int sliceEnd;
@JsonCreator
public SliceAttachedWindowingStrategy(
@JsonProperty(FIELD_NAME_WINDOW) WindowSpec window,
@JsonProperty(value = FIELD_NAME_TIME_ATTRIBUTE_TYPE) LogicalType timeAttributeType,
@JsonProperty(FIELD_NAME_SLICE_END) int sliceEnd) {
super(window, timeAttributeType);
checkArgument(sliceEnd >= 0);
this.sliceEnd = sliceEnd;
}
@Override
public String toSummaryString(String[] inputFieldNames) {
checkArgument(sliceEnd < inputFieldNames.length);
String windowing = String.format("slice_end=[%s]", inputFieldNames[sliceEnd]);
return window.toSummaryString(windowing);
}
public int getSliceEnd() {
return sliceEnd;
}
}