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Declarative Machine Learning
/*
* 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.sysml.runtime.matrix.data;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.Serializable;
import org.apache.hadoop.io.RawComparator;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableComparator;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Partitioner;
import org.apache.sysml.runtime.util.UtilFunctions;
public class TripleIndexes implements WritableComparable, Serializable
{
private static final long serialVersionUID = -4514135024726916288L;
private long first=-1;
private long second=-1;
private long third=-1;
public TripleIndexes(){}
public TripleIndexes(long i1, long i2, long i3) {
first=i1;
second=i2;
third=i3;
}
public TripleIndexes(TripleIndexes that) {
setIndexes(that);
}
public void setIndexes(TripleIndexes that) {
this.first=that.first;
this.second=that.second;
this.third=that.third;
}
@Override
public String toString() {
return "("+first+", "+second+") k: "+third;
}
public long getFirstIndex()
{
return first;
}
public long getSecondIndex()
{
return second;
}
public long getThirdIndex()
{
return third;
}
public void setIndexes(long i1, long i2, long i3)
{
first=i1;
second=i2;
third=i3;
}
public void readFields(DataInput in) throws IOException {
first=in.readLong();
second=in.readLong();
third=in.readLong();
}
public void write(DataOutput out) throws IOException {
out.writeLong(first);
out.writeLong(second);
out.writeLong(third);
}
public int compareTo(TripleIndexes other)
{
if(this.first!=other.first)
return (this.first>other.first? 1:-1);
else if(this.second!=other.second)
return (this.second>other.second? 1:-1);
else if(this.third!=other.third)
return (this.third>other.third? 1:-1);
return 0;
}
@Override
public boolean equals(Object other)
{
if( !(other instanceof TripleIndexes))
return false;
TripleIndexes tother = (TripleIndexes)other;
return (this.first==tother.first && this.second==tother.second && this.third==tother.third);
}
@Override
public int hashCode() {
return UtilFunctions.longHashCode(first, second, third);
}
public static class Comparator implements RawComparator
{
@Override
public int compare(byte[] b1, int s1, int l1,
byte[] b2, int s2, int l2)
{
return WritableComparator.compareBytes(b1, s1, l1, b2, s2, l2);
}
@Override
public int compare(TripleIndexes m1, TripleIndexes m2) {
return m1.compareTo(m2);
}
}
/**
* Partition based on the first and second index.
*/
public static class FirstTwoIndexesPartitioner implements Partitioner{
@Override
public int getPartition(TripleIndexes key, TaggedMatrixValue value,
int numPartitions) {
return UtilFunctions.longHashCode((key.getFirstIndex()*127)
+key.getSecondIndex()+UtilFunctions.ADD_PRIME1)
%UtilFunctions.DIVIDE_PRIME%numPartitions;
}
@Override
public void configure(JobConf arg0) {
}
}
}