/*
* 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.api.java.typeutils.runtime;
import java.io.IOException;
import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.java.tuple.Tuple0;
import org.apache.flink.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;
@Internal
public class Tuple0Serializer extends TupleSerializer<Tuple0> {
private static final long serialVersionUID = 1278813169022975971L;
public static final Tuple0Serializer INSTANCE = new Tuple0Serializer();
// ------------------------------------------------------------------------
private Tuple0Serializer() {
super(Tuple0.class, new TypeSerializer<?>[0]);
}
// ------------------------------------------------------------------------
@Override
public Tuple0Serializer duplicate() {
return this;
}
@Override
public Tuple0 createInstance() {
return Tuple0.INSTANCE;
}
@Override
public Tuple0 createInstance(Object[] fields) {
if (fields == null || fields.length == 0) {
return Tuple0.INSTANCE;
}
throw new UnsupportedOperationException(
"Tuple0 cannot take any data, as it has zero fields.");
}
@Override
public Tuple0 copy(Tuple0 from) {
return from;
}
@Override
public Tuple0 copy(Tuple0 from, Tuple0 reuse) {
return reuse;
}
@Override
public int getLength() {
return 1;
}
@Override
public void serialize(Tuple0 record, DataOutputView target) throws IOException {
target.writeByte(42);
}
@Override
public Tuple0 deserialize(DataInputView source) throws IOException {
source.readByte();
return Tuple0.INSTANCE;
}
@Override
public Tuple0 deserialize(Tuple0 reuse, DataInputView source) throws IOException {
source.readByte();
return reuse;
}
@Override
public void copy(DataInputView source, DataOutputView target) throws IOException {
target.writeByte(source.readByte());
}
// ------------------------------------------------------------------------
@Override
public int hashCode() {
return Tuple0Serializer.class.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj instanceof Tuple0Serializer) {
Tuple0Serializer other = (Tuple0Serializer) obj;
return other.canEqual(this);
} else {
return false;
}
}
@Override
public boolean canEqual(Object obj) {
return obj instanceof Tuple0Serializer;
}
@Override
public String toString() {
return "Tuple0Serializer";
}
}