/*license*\
XBN-Java: Copyright (C) 2014, Jeff Epstein (aliteralmind __DASH__ github __AT__ yahoo __DOT__ com)
This software is dual-licensed under the:
- Lesser General Public License (LGPL) version 3.0 or, at your option, any later version;
- Apache Software License (ASL) version 2.0.
Either license may be applied at your discretion. More information may be found at
- http://en.wikipedia.org/wiki/Multi-licensing.
The text of both licenses is available in the root directory of this project, under the names "LICENSE_lgpl-3.0.txt" and "LICENSE_asl-2.0.txt". The latest copies may be downloaded at:
- LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
- ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
\*license*/
package com.github.xbn.keyed;
import java.util.Objects;
import com.github.xbn.lang.CrashIfObject;
import java.util.Comparator;
/**
<p>Comparator for {@code Keyed} elements whose keys are comparable.</p>
* @since 0.1.0
* @author Copyright (C) 2014, Jeff Epstein ({@code aliteralmind __DASH__ github __AT__ yahoo __DOT__ com}), dual-licensed under the LGPL (version 3.0 or later) or the ASL (version 2.0). See source code for details. <a href="http://xbnjava.aliteralmind.com">{@code http://xbnjava.aliteralmind.com}</a>, <a href="https://github.com/aliteralmind/xbnjava">{@code https://github.com/aliteralmind/xbnjava}</a>
**/
public class KeyComparator<K extends Comparable<? super K>,D extends Keyed<K>> implements Comparator<D> {
@Override
public int compare(D keyed_a, D keyed_2) {
try {
return keyed_a.getKey().compareTo(keyed_2.getKey());
} catch(RuntimeException rx) {
Objects.requireNonNull(keyed_a, "keyed_a");
throw CrashIfObject.nullOrReturnCause(keyed_2, "keyed_2", null, rx);
}
}
}