org.davidmoten.hilbert.Node Maven / Gradle / Ivy
package org.davidmoten.hilbert;
import com.github.davidmoten.guavamini.Preconditions;
// NotThreadSafe
final class Node implements Comparable {
final Range value;
private Node next;
private Node previous;
private long distanceToPrevious;
Node(Range value) {
this.value = value;
}
Node next() {
return next;
}
Node previous() {
return previous;
}
Node setNext(Node next) {
Preconditions.checkNotNull(next);
Preconditions.checkArgument(next != this);
this.next = next;
next.distanceToPrevious = value.low() - next.value.high();
next.previous = this;
return this;
}
@Override
public int compareTo(Node o) {
if (this == o) {
return 0;
} else {
if (next == null) {
return -1;
}
long x = distanceToPrevious;
long y = o.distanceToPrevious;
if (x < y) {
return -1;
} else if (x == y) {
return Long.compare(value.low(), o.value.low());
} else {
return 1;
}
}
}
@Override
public String toString() {
return "Node [value=" + value + ", next=" + next + ", previous=" + previous + "]";
}
void setDistanceToPrevious(long distance) {
this.distanceToPrevious = distance;
}
void clearForGc() {
next = null;
previous = null;
}
}