source: josm/branch/0.5/src/org/openstreetmap/josm/data/osm/NodePair.java@ 335

package org.openstreetmap.josm.data.osm;
import java.util.ArrayList;

/**
 * A pair of twe nodes.
 */
public final class NodePair {
        public Node a, b;

        public NodePair(Node a, Node b) {
                this.a = a;
                this.b = b;
        }

        @Override public int hashCode() {
                return a.hashCode() ^ b.hashCode();
        }

        @Override public boolean equals(Object o) {
                if (o == null || !(o instanceof NodePair)) {
                        return false;
                }
                return a == ((NodePair) o).a && b == ((NodePair) o).b;
        }

        public ArrayList<Node> toArrayList() {
                ArrayList<Node> l = new ArrayList<Node>(2);
                l.add(a);
                l.add(b);
                return l;
        }

        public void sort() {
                if (b.hashCode() < a.hashCode()) {
                        Node tmp = a;
                        a = b;
                        b = tmp;
                }
        }
}