xapi.util.impl.ComparablePair Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of xapi-dev Show documentation

Everything needed to run a comprehensive dev environment. Just type X_ and pick a service from autocomplete; new dev modules will be added as they are built. The only dev service not included in the uber jar is xapi-dev-maven, as it includes all runtime dependencies of maven, adding ~4 seconds to build time, and 6 megabytes to the final output jar size (without xapi-dev-maven, it's ~1MB).

The newest version!

package xapi.util.impl;

import xapi.util.api.Pair;
/**
 * A pair which implements comparable, using both components as comparable objects.
 * 
 * It allows you to define whether to compare x before y (slot 0 or 1), or vice versa.
 * This is useful in graphical mapping, where you may want to sort a map horizontally or vertically.
 * 
 * @author "James X. Nelson ([email protected])"
 *
 * @param 
 * @param 
 */
public class ComparablePair ,Y extends Comparable> 
implements Pair,Comparable>{

  private X x;
  private Y y;
  
  
  public ComparablePair() {
  }
  public ComparablePair(X x,Y y) {
    
    set0(x);
    set1(y);
  }
  
    @Override
    public int compareTo(ComparablePair o) {
      X _x = o.get0();
      Y _y = o.get1();
      final int dX, dY;
      if (x == null) {
        if (_x != null) {
          return 1;
        }
        dX = 0;
      } else {
        if (_x == null) {
          return -1;
        }
        dX = x.compareTo(_x);
      }
      
      if (y == null) {
        if (_y != null) {
          return 1;
        }
        dY = 0;
      } else {
        if (_y == null) {
          return -1;
        }
        dY = y.compareTo(_y);
      }
      
      return dX ^ dY;
    }

    @Override
    public X get0() {
      return x;
    }

    @Override
    public Y get1() {
      return y;
    }
    @Override
    public void set0(X x) {
      this.x=x;
    }
    @Override
    public void set1(Y y) {
      this.y=y;
    }
}