/*
* 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.ignite.internal.processors.hadoop.impl.v2;
import org.apache.hadoop.io.serializer.Deserializer;
import org.apache.hadoop.io.serializer.Serialization;
import org.apache.hadoop.io.serializer.Serializer;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.internal.processors.hadoop.HadoopSerialization;
import org.jetbrains.annotations.Nullable;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* The wrapper around external serializer.
*/
public class HadoopSerializationWrapper<T> implements HadoopSerialization {
/** External serializer - writer. */
private final Serializer<T> serializer;
/** External serializer - reader. */
private final Deserializer<T> deserializer;
/** Data output for current write operation. */
private OutputStream currOut;
/** Data input for current read operation. */
private InputStream currIn;
/** Wrapper around current output to provide OutputStream interface. */
private final OutputStream outStream = new OutputStream() {
/** {@inheritDoc} */
@Override public void write(int b) throws IOException {
currOut.write(b);
}
/** {@inheritDoc} */
@Override public void write(byte[] b, int off, int len) throws IOException {
currOut.write(b, off, len);
}
};
/** Wrapper around current input to provide InputStream interface. */
private final InputStream inStream = new InputStream() {
/** {@inheritDoc} */
@Override public int read() throws IOException {
return currIn.read();
}
/** {@inheritDoc} */
@Override public int read(byte[] b, int off, int len) throws IOException {
return currIn.read(b, off, len);
}
};
/**
* @param serialization External serializer to wrap.
* @param cls The class to serialize.
*/
public HadoopSerializationWrapper(Serialization<T> serialization, Class<T> cls) throws IgniteCheckedException {
assert cls != null;
serializer = serialization.getSerializer(cls);
deserializer = serialization.getDeserializer(cls);
try {
serializer.open(outStream);
deserializer.open(inStream);
}
catch (IOException e) {
throw new IgniteCheckedException(e);
}
}
/** {@inheritDoc} */
@Override public void write(DataOutput out, Object obj) throws IgniteCheckedException {
assert out != null;
assert obj != null;
try {
currOut = (OutputStream)out;
serializer.serialize((T)obj);
currOut = null;
}
catch (IOException e) {
throw new IgniteCheckedException(e);
}
}
/** {@inheritDoc} */
@Override public Object read(DataInput in, @Nullable Object obj) throws IgniteCheckedException {
assert in != null;
try {
currIn = (InputStream)in;
T res = deserializer.deserialize((T) obj);
currIn = null;
return res;
}
catch (IOException e) {
throw new IgniteCheckedException(e);
}
}
/** {@inheritDoc} */
@Override public void close() throws IgniteCheckedException {
try {
serializer.close();
deserializer.close();
}
catch (IOException e) {
throw new IgniteCheckedException(e);
}
}
}