PairOfIntMinhashSignature.java

package ivory.lsh.data;

import java.io.DataInput;
import java.io.IOException;

public class PairOfIntMinhashSignature extends PairOfIntSignature {

  public PairOfIntMinhashSignature() {
    super();
  }

  public PairOfIntMinhashSignature(int i, Signature permutedSign) {
    permNo = i;
    signature = permutedSign;
  }

  @Override
  public void readFields(DataInput in)  {
    signature = new MinhashSignature();

    try {
      permNo = in.readInt();
    } catch (IOException e1) {
      e1.printStackTrace();
      throw new RuntimeException("Could not read permNo in PairOfIntSignature");
    }

    try {
      signature.readFields(in);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  @SuppressWarnings("unchecked")
  @Override
  public int compareTo(Object other) {
    PairOfIntMinhashSignature p = (PairOfIntMinhashSignature) other;

    int c = signature.compareTo(p.signature);
    if(c==0){
      return (permNo<p.permNo) ? -1 : ((permNo>p.permNo) ? 1 :0);
    }else{
      return c;
    }
  }

  public boolean equals(Object other){
    PairOfIntMinhashSignature p = (PairOfIntMinhashSignature) other;

    return (p.getInt()==getInt() && ((MinhashSignature)p.getSignature()).equals(this.getSignature()));
  }

  @Override
  public int hashCode(){
    int h = signature.hashCode()+permNo;
    if(h>0){
      return h ^ Integer.MAX_VALUE;
    }else{
      return h ^ Integer.MIN_VALUE;			
    }
  }
}