icbm/src/main/java/icbm/core/Pair.java

package icbm.core;

public class Pair<T> {
  private final T left;
  private final T right;

  public Pair(final T left, final T right) {
    this.left = left;
    this.right = right;
  }

  public T getKey() { return this.left; }

  public T getValue() { return this.right; }

  @Override
  public int hashCode() {
    return this.left.hashCode() ^ this.right.hashCode();
  }

  @Override
  public boolean equals(final Object o) {
    if (o == null) {
      return false;
    }
    if (!(o instanceof Pair)) {
      return false;
    }
    final Pair<?> pairo = (Pair<?>)o;
    return this.left.equals(pairo.getKey()) &&
        this.right.equals(pairo.getValue());
  }
}