com.google.common.collect.ReverseOrdering Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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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 com.google.common.collect;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import java.util.Iterator;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;
/** An ordering that uses the reverse of a given order. */
@GwtCompatible(serializable = true)
@ElementTypesAreNonnullByDefault
final class ReverseOrdering extends Ordering
implements Serializable {
final Ordering forwardOrder;
ReverseOrdering(Ordering forwardOrder) {
this.forwardOrder = checkNotNull(forwardOrder);
}
@Override
public int compare(@ParametricNullness T a, @ParametricNullness T b) {
return forwardOrder.compare(b, a);
}
@SuppressWarnings("unchecked") // how to explain?
@Override
public Ordering reverse() {
return (Ordering) forwardOrder;
}
// Override the min/max methods to "hoist" delegation outside loops
@Override
public E min(@ParametricNullness E a, @ParametricNullness E b) {
return forwardOrder.max(a, b);
}
@Override
public E min(
@ParametricNullness E a, @ParametricNullness E b, @ParametricNullness E c, E... rest) {
return forwardOrder.max(a, b, c, rest);
}
@Override
public E min(Iterator iterator) {
return forwardOrder.max(iterator);
}
@Override
public E min(Iterable iterable) {
return forwardOrder.max(iterable);
}
@Override
public E max(@ParametricNullness E a, @ParametricNullness E b) {
return forwardOrder.min(a, b);
}
@Override
public E max(
@ParametricNullness E a, @ParametricNullness E b, @ParametricNullness E c, E... rest) {
return forwardOrder.min(a, b, c, rest);
}
@Override
public E max(Iterator iterator) {
return forwardOrder.min(iterator);
}
@Override
public E max(Iterable iterable) {
return forwardOrder.min(iterable);
}
@Override
public int hashCode() {
return -forwardOrder.hashCode();
}
@Override
public boolean equals(@CheckForNull Object object) {
if (object == this) {
return true;
}
if (object instanceof ReverseOrdering) {
ReverseOrdering that = (ReverseOrdering) object;
return this.forwardOrder.equals(that.forwardOrder);
}
return false;
}
@Override
public String toString() {
return forwardOrder + ".reverse()";
}
private static final long serialVersionUID = 0;
}