/**
* Copyright 2011 Nube Technologies
*
* 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 co.nubetech.hiho.dedup;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.io.MD5Hash;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableComparator;
import org.apache.log4j.Logger;
public class HihoTuple<K extends Writable> implements
WritableComparable<HihoTuple> {
final static Logger logger = Logger
.getLogger(co.nubetech.hiho.dedup.HihoTuple.class);
protected MD5Hash hash;
protected K key;
private Text keyClass;
public K getKey() {
return key;
}
public void setKey(K key) throws IOException {
this.key = key;
this.hash = HashUtility.getMD5Hash(key);
this.keyClass = new Text(key.getClass().getName());
logger.debug("Key is: " + this.getKey());
logger.debug("Hash is: " + this.getHash());
}
public MD5Hash getHash() {
return hash;
}
public void setHash(MD5Hash hash) {
this.hash = hash;
}
@Override
public int hashCode() {
return getHash().hashCode();
}
@Override
public void readFields(DataInput in) throws IOException {
logger.debug("Reading fields");
hash = new MD5Hash();
hash.readFields(in);
keyClass = new Text();
keyClass.readFields(in);
try {
logger.debug("Key class in readField() of HihoTuple class is :"
+ keyClass);
key = (K) Class.forName(keyClass.toString()).newInstance();
} catch (Exception e) {
e.printStackTrace();
throw new IOException("Error in serializing the HihoTuple ", e);
}
key.readFields(in);
}
/*@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((hash == null) ? 0 : hash.hashCode());
result = prime * result + ((key == null) ? 0 : key.hashCode());
result = prime * result
+ ((keyClass == null) ? 0 : keyClass.hashCode());
return result;
}*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
HihoTuple other = (HihoTuple) obj;
if (hash == null) {
if (other.hash != null)
return false;
} else if (!hash.equals(other.hash))
return false;
if (key == null) {
if (other.key != null)
return false;
} else if (!key.equals(other.key))
return false;
if (keyClass == null) {
if (other.keyClass != null)
return false;
} else if (!keyClass.equals(other.keyClass))
return false;
return true;
}
@Override
public void write(DataOutput out) throws IOException {
logger.debug("Writing fields");
hash.write(out);
keyClass.write(out);
key.write(out);
}
@Override
public int compareTo(HihoTuple hihoTuple) {
return WritableComparator.compareBytes(this.hash.getDigest(), 0,
this.hash.MD5_LEN, hihoTuple.hash.getDigest(), 0,
hihoTuple.hash.MD5_LEN);
}
}