/*
* 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.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.java.tuple.Tuple;
import org.apache.flink.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;
import org.apache.flink.types.NullFieldException;
public final class TupleSerializer<T extends Tuple> extends TupleSerializerBase<T> {
private static final long serialVersionUID = 1L;
public TupleSerializer(Class<T> tupleClass, TypeSerializer<?>[] fieldSerializers) {
super(tupleClass, fieldSerializers);
}
@Override
public T createInstance() {
try {
T t = tupleClass.newInstance();
for (int i = 0; i < arity; i++) {
t.setField(fieldSerializers[i].createInstance(), i);
}
return t;
}
catch (Exception e) {
throw new RuntimeException("Cannot instantiate tuple.", e);
}
}
@Override
public T createInstance(Object[] fields) {
try {
T t = tupleClass.newInstance();
for (int i = 0; i < arity; i++) {
t.setField(fields[i], i);
}
return t;
}
catch (Exception e) {
throw new RuntimeException("Cannot instantiate tuple.", e);
}
}
@Override
public T copy(T from) {
T target = instantiateRaw();
for (int i = 0; i < arity; i++) {
Object copy = fieldSerializers[i].copy(from.getField(i));
target.setField(copy, i);
}
return target;
}
@Override
public T copy(T from, T reuse) {
for (int i = 0; i < arity; i++) {
Object copy = fieldSerializers[i].copy(from.getField(i), reuse.getField(i));
reuse.setField(copy, i);
}
return reuse;
}
@Override
public void serialize(T value, DataOutputView target) throws IOException {
for (int i = 0; i < arity; i++) {
Object o = value.getField(i);
try {
fieldSerializers[i].serialize(o, target);
} catch (NullPointerException npex) {
throw new NullFieldException(i);
}
}
}
@Override
public T deserialize(DataInputView source) throws IOException {
T tuple = instantiateRaw();
for (int i = 0; i < arity; i++) {
Object field = fieldSerializers[i].deserialize(source);
tuple.setField(field, i);
}
return tuple;
}
@Override
public T deserialize(T reuse, DataInputView source) throws IOException {
for (int i = 0; i < arity; i++) {
Object field = fieldSerializers[i].deserialize(reuse.getField(i), source);
reuse.setField(field, i);
}
return reuse;
}
private T instantiateRaw() {
try {
return tupleClass.newInstance();
}
catch (Exception e) {
throw new RuntimeException("Cannot instantiate tuple.", e);
}
}
}