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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 shaded.shaded.com.google.errorprone.annotations.concurrent.LazyInit;
import java.io.Serializable;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;
/** An ordering that uses the natural order of the values. */
@GwtCompatible(serializable = true)
@SuppressWarnings({"unchecked", "rawtypes"}) // TODO(kevinb): the right way to explain this??
@ElementTypesAreNonnullByDefault
final class NaturalOrdering extends Ordering> implements Serializable {
static final NaturalOrdering INSTANCE = new NaturalOrdering();
// TODO: b/287198172 - Consider eagerly initializing these (but think about serialization).
@LazyInit @CheckForNull private transient Ordering<@Nullable Comparable> nullsFirst;
@LazyInit @CheckForNull private transient Ordering<@Nullable Comparable> nullsLast;
@Override
public int compare(Comparable left, Comparable right) {
checkNotNull(left); // for GWT
checkNotNull(right);
return ((Comparable