/*
* Copyright (C) 2007 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.collect;
import com.google.common.annotations.
GwtCompatible;
import java.io.
Serializable;
/**
* An ordering that uses the natural order of the string representation of the
* values.
*/
@
GwtCompatible(serializable = true)
final class
UsingToStringOrdering
extends
Ordering<
Object> implements
Serializable {
static final
UsingToStringOrdering INSTANCE = new
UsingToStringOrdering();
@
Override public int
compare(
Object left,
Object right) {
return
left.
toString().
compareTo(
right.
toString());
}
// preserve singleton-ness, so equals() and hashCode() work correctly
private
Object readResolve() {
return
INSTANCE;
}
@
Override public
String toString() {
return "Ordering.usingToString()";
}
private
UsingToStringOrdering() {}
private static final long
serialVersionUID = 0;
}