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/*
* 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 shaded.shaded.com.google.common.collect;
import static shaded.shaded.com.google.common.base.Preconditions.checkNotNull;
import shaded.shaded.com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import java.util.Comparator;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;
/** An ordering for a pre-existing comparator. */
@GwtCompatible(serializable = true)
@ElementTypesAreNonnullByDefault
final class ComparatorOrdering extends Ordering
implements Serializable {
final Comparator comparator;
ComparatorOrdering(Comparator comparator) {
this.comparator = checkNotNull(comparator);
}
@Override
public int compare(@ParametricNullness T a, @ParametricNullness T b) {
return comparator.compare(a, b);
}
@Override
public boolean equals(@CheckForNull 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;
}