EaglerForge/sources/main/java/com/google/common/collect/UsingToStringOrdering.java

51 lines
1.4 KiB
Java

/*
* 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 java.io.Serializable;
import com.google.common.annotations.GwtCompatible;
/**
* 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;
}