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/*
* 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.nodes.exec.serde;
import org.apache.flink.table.api.TableException;
import org.apache.flink.table.expressions.FieldReferenceExpression;
import org.apache.flink.table.expressions.ValueLiteralExpression;
import org.apache.flink.table.planner.expressions.PlannerWindowReference;
import org.apache.flink.table.planner.plan.logical.LogicalWindow;
import org.apache.flink.table.planner.plan.logical.SessionGroupWindow;
import org.apache.flink.table.planner.plan.logical.SlidingGroupWindow;
import org.apache.flink.table.planner.plan.logical.TumblingGroupWindow;
import org.apache.flink.table.types.AtomicDataType;
import org.apache.flink.table.types.logical.LogicalType;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonParser;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonProcessingException;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.DeserializationContext;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.JsonNode;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import java.io.IOException;
import java.time.Duration;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_ALIAS;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_FIELD_INDEX;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_FIELD_NAME;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_FIELD_TYPE;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_GAP;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_INPUT_INDEX;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_IS_TIME_WINDOW;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_KIND;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_SIZE;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_SLIDE;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.FIELD_NAME_TIME_FIELD;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.KIND_SESSION;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.KIND_SLIDING;
import static org.apache.flink.table.planner.plan.nodes.exec.serde.LogicalWindowJsonSerializer.KIND_TUMBLING;
/**
* JSON deserializer for {@link LogicalWindow}, refer to {@link LogicalWindowJsonSerializer} for
* serializer.
*/
public class LogicalWindowJsonDeserializer extends StdDeserializer {
private static final long serialVersionUID = 1L;
public LogicalWindowJsonDeserializer() {
super(LogicalWindow.class);
}
@Override
public LogicalWindow deserialize(
JsonParser jsonParser, DeserializationContext deserializationContext)
throws IOException, JsonProcessingException {
FlinkDeserializationContext flinkDeserializationContext =
(FlinkDeserializationContext) deserializationContext;
ObjectMapper mapper = flinkDeserializationContext.getObjectMapper();
JsonNode jsonNode = jsonParser.readValueAsTree();
String kind = jsonNode.get(FIELD_NAME_KIND).asText().toUpperCase();
PlannerWindowReference alias =
mapper.readValue(
jsonNode.get(FIELD_NAME_ALIAS).toString(), PlannerWindowReference.class);
FieldReferenceExpression timeField =
deserializeFieldReferenceExpression(jsonNode.get(FIELD_NAME_TIME_FIELD), mapper);
switch (kind) {
case KIND_TUMBLING:
boolean isTimeTumblingWindow = jsonNode.get(FIELD_NAME_IS_TIME_WINDOW).asBoolean();
if (isTimeTumblingWindow) {
Duration size =
mapper.readValue(
jsonNode.get(FIELD_NAME_SIZE).toString(), Duration.class);
return new TumblingGroupWindow(
alias, timeField, new ValueLiteralExpression(size));
} else {
long size = jsonNode.get(FIELD_NAME_SIZE).asLong();
return new TumblingGroupWindow(
alias, timeField, new ValueLiteralExpression(size));
}
case KIND_SLIDING:
boolean isTimeSlidingWindow = jsonNode.get(FIELD_NAME_IS_TIME_WINDOW).asBoolean();
if (isTimeSlidingWindow) {
Duration size =
mapper.readValue(
jsonNode.get(FIELD_NAME_SIZE).toString(), Duration.class);
Duration slide =
mapper.readValue(
jsonNode.get(FIELD_NAME_SLIDE).toString(), Duration.class);
return new SlidingGroupWindow(
alias,
timeField,
new ValueLiteralExpression(size),
new ValueLiteralExpression(slide));
} else {
long size = jsonNode.get(FIELD_NAME_SIZE).asLong();
long slide = jsonNode.get(FIELD_NAME_SLIDE).asLong();
return new SlidingGroupWindow(
alias,
timeField,
new ValueLiteralExpression(size),
new ValueLiteralExpression(slide));
}
case KIND_SESSION:
Duration gap =
mapper.readValue(jsonNode.get(FIELD_NAME_GAP).toString(), Duration.class);
return new SessionGroupWindow(alias, timeField, new ValueLiteralExpression(gap));
default:
throw new TableException("Unknown Logical Window:" + jsonNode);
}
}
private FieldReferenceExpression deserializeFieldReferenceExpression(
JsonNode input, ObjectMapper mapper) throws JsonProcessingException {
String name = input.get(FIELD_NAME_FIELD_NAME).asText();
int fieldIndex = input.get(FIELD_NAME_FIELD_INDEX).asInt();
int inputIndex = input.get(FIELD_NAME_INPUT_INDEX).asInt();
LogicalType type =
mapper.readValue(input.get(FIELD_NAME_FIELD_TYPE).toString(), LogicalType.class);
return new FieldReferenceExpression(name, new AtomicDataType(type), inputIndex, fieldIndex);
}
}