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Apache Hadoop MapReduce Streaming
/**
* 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.hadoop.record;
import java.io.IOException;
import java.util.TreeMap;
import java.util.ArrayList;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.OutputStream;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* @deprecated Replaced by Avro.
*/
@Deprecated
@InterfaceAudience.Public
@InterfaceStability.Stable
public class BinaryRecordOutput implements RecordOutput {
private DataOutput out;
private BinaryRecordOutput() {}
private void setDataOutput(DataOutput out) {
this.out = out;
}
private static final ThreadLocal B_OUT =
new ThreadLocal() {
@Override
protected BinaryRecordOutput initialValue() {
return new BinaryRecordOutput();
}
};
/**
* Get a thread-local record output for the supplied DataOutput.
* @param out data output stream
* @return binary record output corresponding to the supplied DataOutput.
*/
public static BinaryRecordOutput get(DataOutput out) {
BinaryRecordOutput bout = B_OUT.get();
bout.setDataOutput(out);
return bout;
}
/** Creates a new instance of BinaryRecordOutput */
public BinaryRecordOutput(OutputStream out) {
this.out = new DataOutputStream(out);
}
/** Creates a new instance of BinaryRecordOutput */
public BinaryRecordOutput(DataOutput out) {
this.out = out;
}
@Override
public void writeByte(byte b, String tag) throws IOException {
out.writeByte(b);
}
@Override
public void writeBool(boolean b, String tag) throws IOException {
out.writeBoolean(b);
}
@Override
public void writeInt(int i, String tag) throws IOException {
Utils.writeVInt(out, i);
}
@Override
public void writeLong(long l, String tag) throws IOException {
Utils.writeVLong(out, l);
}
@Override
public void writeFloat(float f, String tag) throws IOException {
out.writeFloat(f);
}
@Override
public void writeDouble(double d, String tag) throws IOException {
out.writeDouble(d);
}
@Override
public void writeString(String s, String tag) throws IOException {
Utils.toBinaryString(out, s);
}
@Override
public void writeBuffer(Buffer buf, String tag)
throws IOException {
byte[] barr = buf.get();
int len = buf.getCount();
Utils.writeVInt(out, len);
out.write(barr, 0, len);
}
@Override
public void startRecord(Record r, String tag) throws IOException {}
@Override
public void endRecord(Record r, String tag) throws IOException {}
@Override
public void startVector(ArrayList v, String tag) throws IOException {
writeInt(v.size(), tag);
}
@Override
public void endVector(ArrayList v, String tag) throws IOException {}
@Override
public void startMap(TreeMap v, String tag) throws IOException {
writeInt(v.size(), tag);
}
@Override
public void endMap(TreeMap v, String tag) throws IOException {}
}