eaglercraft-1.8/sources/main/java/com/google/common/collect/ComparatorOrdering.java

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2022-12-25 01:12:28 -08:00
/*
* 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 static com.google.common.base.Preconditions.checkNotNull;
import java.io.Serializable;
import java.util.Comparator;
import javax.annotation.Nullable;
import com.google.common.annotations.GwtCompatible;
/** An ordering for a pre-existing comparator. */
@GwtCompatible(serializable = true)
final class ComparatorOrdering<T> extends Ordering<T> implements Serializable {
final Comparator<T> comparator;
ComparatorOrdering(Comparator<T> comparator) {
this.comparator = checkNotNull(comparator);
}
@Override
public int compare(T a, T b) {
return comparator.compare(a, b);
}
@Override
public boolean equals(@Nullable Object object) {
if (object == this) {
return true;
}
if (object instanceof ComparatorOrdering) {
ComparatorOrdering<?> that = (ComparatorOrdering<?>) object;
return this.comparator.equals(that.comparator);
}
return false;
}
@Override
public int hashCode() {
return comparator.hashCode();
}
@Override
public String toString() {
return comparator.toString();
}
private static final long serialVersionUID = 0;
}