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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.runtime.typeutils;
import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.common.typeutils.TypeSerializerSchemaCompatibility;
import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot;
import org.apache.flink.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;
import org.apache.flink.table.data.TimestampData;
import java.io.IOException;
/**
* Serializer for {@link TimestampData}.
*
* A {@link TimestampData} instance can be compactly serialized as a long value(= millisecond)
* when the Timestamp type is compact. Otherwise it's serialized as a long value and a int value.
*/
@Internal
public class TimestampDataSerializer extends TypeSerializer {
private static final long serialVersionUID = 1L;
private final int precision;
public TimestampDataSerializer(int precision) {
this.precision = precision;
}
@Override
public boolean isImmutableType() {
return true;
}
@Override
public TypeSerializer duplicate() {
return new TimestampDataSerializer(precision);
}
@Override
public TimestampData createInstance() {
return TimestampData.fromEpochMillis(0);
}
@Override
public TimestampData copy(TimestampData from) {
return from;
}
@Override
public TimestampData copy(TimestampData from, TimestampData reuse) {
return copy(from);
}
@Override
public int getLength() {
return ((TimestampData.isCompact(precision)) ? 8 : 12);
}
@Override
public void serialize(TimestampData record, DataOutputView target) throws IOException {
if (TimestampData.isCompact(precision)) {
assert record.getNanoOfMillisecond() == 0;
target.writeLong(record.getMillisecond());
} else {
target.writeLong(record.getMillisecond());
target.writeInt(record.getNanoOfMillisecond());
}
}
@Override
public TimestampData deserialize(DataInputView source) throws IOException {
if (TimestampData.isCompact(precision)) {
long val = source.readLong();
return TimestampData.fromEpochMillis(val);
} else {
long longVal = source.readLong();
int intVal = source.readInt();
return TimestampData.fromEpochMillis(longVal, intVal);
}
}
@Override
public TimestampData deserialize(TimestampData reuse, DataInputView source) throws IOException {
return deserialize(source);
}
@Override
public void copy(DataInputView source, DataOutputView target) throws IOException {
if (TimestampData.isCompact(precision)) {
target.writeLong(source.readLong());
} else {
target.writeLong(source.readLong());
target.writeInt(source.readInt());
}
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
TimestampDataSerializer that = (TimestampDataSerializer) obj;
return precision == that.precision;
}
@Override
public int hashCode() {
return precision;
}
@Override
public TypeSerializerSnapshot snapshotConfiguration() {
return new TimestampDataSerializerSnapshot(precision);
}
/** {@link TypeSerializerSnapshot} for {@link TimestampDataSerializer}. */
public static final class TimestampDataSerializerSnapshot
implements TypeSerializerSnapshot {
private static final int CURRENT_VERSION = 1;
private int previousPrecision;
public TimestampDataSerializerSnapshot() {
// this constructor is used when restoring from a checkpoint/savepoint.
}
TimestampDataSerializerSnapshot(int precision) {
this.previousPrecision = precision;
}
@Override
public int getCurrentVersion() {
return CURRENT_VERSION;
}
@Override
public void writeSnapshot(DataOutputView out) throws IOException {
out.writeInt(previousPrecision);
}
@Override
public void readSnapshot(int readVersion, DataInputView in, ClassLoader userCodeClassLoader)
throws IOException {
this.previousPrecision = in.readInt();
}
@Override
public TypeSerializer restoreSerializer() {
return new TimestampDataSerializer(previousPrecision);
}
@Override
public TypeSerializerSchemaCompatibility resolveSchemaCompatibility(
TypeSerializer newSerializer) {
if (!(newSerializer instanceof TimestampDataSerializer)) {
return TypeSerializerSchemaCompatibility.incompatible();
}
TimestampDataSerializer timestampDataSerializer =
(TimestampDataSerializer) newSerializer;
if (previousPrecision != timestampDataSerializer.precision) {
return TypeSerializerSchemaCompatibility.incompatible();
} else {
return TypeSerializerSchemaCompatibility.compatibleAsIs();
}
}
}
}