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DonationProjection.java
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DonationProjection.java
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package mapreduce.join.repartition;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableUtils;
import data.writable.DonationWritable;
/**
* Writable class used for containing only the necessary field values for "donation" data.
*
* @author Nicomak
*
*/
public class DonationProjection implements WritableComparable<DonationProjection> {
public String donation_id;
public String project_id;
public String ddate;
public String donor_city;
public float total;
public static DonationProjection makeProjection(DonationWritable donation) {
DonationProjection dp = new DonationProjection();
dp.donation_id = donation.donation_id;
dp.project_id = donation.project_id;
dp.ddate = donation.ddate;
dp.donor_city = donation.donor_city;
dp.total = donation.total;
return dp;
}
@Override
public void write(DataOutput out) throws IOException {
WritableUtils.writeString(out, donation_id);
WritableUtils.writeString(out, project_id);
WritableUtils.writeString(out, ddate);
WritableUtils.writeString(out, donor_city);
out.writeFloat(total);
}
@Override
public void readFields(DataInput in) throws IOException {
donation_id = WritableUtils.readString(in);
project_id = WritableUtils.readString(in);
ddate = WritableUtils.readString(in);
donor_city = WritableUtils.readString(in);
total = in.readFloat();
}
@Override
public int compareTo(DonationProjection o) {
return donation_id.compareTo(o.donation_id);
}
}