/**
* Copyright 2013 Netflix, 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 com.netflix.aegisthus.pig;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.rmi.UnexpectedException;
import java.util.Map;
import org.apache.commons.codec.binary.Hex;
import org.apache.pig.LoadCaster;
import org.apache.pig.ResourceSchema.ResourceFieldSchema;
import org.apache.pig.data.DataBag;
import org.apache.pig.data.Tuple;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AegisthusLoadCaster implements LoadCaster {
private static Logger LOG = LoggerFactory.getLogger(AegisthusLoadCaster.class);
private static final Hex hex = new Hex();
@Override
public DataBag bytesToBag(byte[] arg0, ResourceFieldSchema arg1) throws IOException {
throw new IOException("Don't do that");
}
@Override
public String bytesToCharArray(byte[] arg0) throws IOException {
if (arg0 == null || arg0.length == 0) {
return null;
}
try {
return new String(hex.decode(arg0));
} catch (Exception e) {
LOG.error("failed to convert " + new String(arg0) + " to chararray");
return null;
}
}
@Override
public Double bytesToDouble(byte[] arg0) throws IOException {
if (arg0 == null || arg0.length == 0) {
return null;
}
try {
byte[] by = hex.decode(arg0);
ByteBuffer bb = ByteBuffer.allocate(by.length);
bb.put(by);
bb.position(0);
return bb.getDouble();
} catch (Exception e) {
LOG.error("failed to convert " + new String(arg0) + " to double");
return null;
}
}
@Override
public Float bytesToFloat(byte[] arg0) throws IOException {
if (arg0 == null || arg0.length == 0) {
return null;
}
try {
byte[] by = hex.decode(arg0);
ByteBuffer bb = ByteBuffer.allocate(by.length);
bb.put(by);
bb.position(0);
return bb.getFloat();
} catch (Exception e) {
LOG.error("failed to convert " + new String(arg0) + " to float");
return null;
}
}
@Override
public Integer bytesToInteger(byte[] arg0) throws IOException {
if (arg0 == null || arg0.length == 0) {
return null;
}
try {
return Integer.valueOf(bytesToCharArray(arg0));
} catch (Exception e) {
}
try {
return (int) getNumber(arg0);
} catch (Exception e) {
LOG.error("failed to convert " + new String(arg0) + " to int");
return null;
}
}
private long getNumber(byte[] arg0) throws Exception {
byte[] by = hex.decode(arg0);
ByteBuffer bb = ByteBuffer.allocate(by.length);
bb.put(by);
bb.position(0);
switch(by.length) {
case 1:
return (long)bb.get();
case 2:
return (long)bb.getShort();
case 4:
return (long)bb.getInt();
case 8:
return (long)bb.getLong();
}
throw new UnexpectedException("couldn't determine datatype");
}
@Override
public Long bytesToLong(byte[] arg0) throws IOException {
if (arg0 == null || arg0.length == 0) {
return null;
}
try {
return Long.valueOf(bytesToCharArray(arg0));
} catch (Exception e) {
}
try {
return getNumber(arg0);
} catch (Exception e) {
LOG.error("failed to convert " + new String(arg0) + " to long");
return null;
}
}
@Override
@Deprecated
public Map<String, Object> bytesToMap(byte[] arg0) throws IOException {
throw new IOException("Don't do that");
}
@Override
public Tuple bytesToTuple(byte[] arg0, ResourceFieldSchema arg1) throws IOException {
throw new IOException("Don't do that");
}
@Override
public Map<String, Object> bytesToMap(byte[] arg0, ResourceFieldSchema arg1) throws IOException {
throw new IOException("Don't do that");
}
@Override
public Boolean bytesToBoolean(byte[] arg0) throws IOException {
throw new IOException("Doesn't handle boolean");
}
@Override
public DateTime bytesToDateTime(byte[] arg0) throws IOException {
throw new IOException("Doesn't handle DateTime");
}
}