/**
* Copyright 2012 Twitter, Inc.
*
* Licensed 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 parquet.column.values.plain;
import java.io.IOException;
import java.nio.charset.Charset;
import parquet.Log;
import parquet.bytes.BytesInput;
import parquet.bytes.CapacityByteArrayOutputStream;
import parquet.bytes.LittleEndianDataOutputStream;
import parquet.column.Encoding;
import parquet.column.values.ValuesWriter;
import parquet.io.ParquetEncodingException;
import parquet.io.api.Binary;
/**
* Plain encoding except for booleans
*
* @author Julien Le Dem
*
*/
public class PlainValuesWriter extends ValuesWriter {
private static final Log LOG = Log.getLog(PlainValuesWriter.class);
public static final Charset CHARSET = Charset.forName("UTF-8");
private CapacityByteArrayOutputStream arrayOut;
private LittleEndianDataOutputStream out;
public PlainValuesWriter(int initialSize) {
arrayOut = new CapacityByteArrayOutputStream(initialSize);
out = new LittleEndianDataOutputStream(arrayOut);
}
@Override
public final void writeBytes(Binary v) {
try {
out.writeInt(v.length());
v.writeTo(out);
} catch (IOException e) {
throw new ParquetEncodingException("could not write bytes", e);
}
}
@Override
public final void writeInteger(int v) {
try {
out.writeInt(v);
} catch (IOException e) {
throw new ParquetEncodingException("could not write int", e);
}
}
@Override
public final void writeLong(long v) {
try {
out.writeLong(v);
} catch (IOException e) {
throw new ParquetEncodingException("could not write long", e);
}
}
@Override
public final void writeFloat(float v) {
try {
out.writeFloat(v);
} catch (IOException e) {
throw new ParquetEncodingException("could not write float", e);
}
}
@Override
public final void writeDouble(double v) {
try {
out.writeDouble(v);
} catch (IOException e) {
throw new ParquetEncodingException("could not write double", e);
}
}
@Override
public void writeByte(int value) {
try {
out.write(value);
} catch (IOException e) {
throw new ParquetEncodingException("could not write byte", e);
}
}
@Override
public long getBufferedSize() {
return arrayOut.size();
}
@Override
public BytesInput getBytes() {
try {
out.flush();
} catch (IOException e) {
throw new ParquetEncodingException("could not write page", e);
}
if (Log.DEBUG) LOG.debug("writing a buffer of size " + arrayOut.size());
return BytesInput.from(arrayOut);
}
@Override
public void reset() {
arrayOut.reset();
}
@Override
public long getAllocatedSize() {
return arrayOut.getCapacity();
}
@Override
public Encoding getEncoding() {
return Encoding.PLAIN;
}
@Override
public String memUsageString(String prefix) {
return arrayOut.memUsageString(prefix + " PLAIN");
}
}