com.google.common.collect.EmptyContiguousSet 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).
/*
* Copyright (C) 2011 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 com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import java.io.Serializable;
import java.util.NoSuchElementException;
import java.util.Set;
import javax.annotation.CheckForNull;
/**
* An empty contiguous set.
*
* @author Gregory Kick
*/
@GwtCompatible(emulated = true)
@SuppressWarnings("rawtypes") // allow ungenerified Comparable types
@ElementTypesAreNonnullByDefault
final class EmptyContiguousSet extends ContiguousSet {
EmptyContiguousSet(DiscreteDomain domain) {
super(domain);
}
@Override
public C first() {
throw new NoSuchElementException();
}
@Override
public C last() {
throw new NoSuchElementException();
}
@Override
public int size() {
return 0;
}
@Override
public ContiguousSet intersection(ContiguousSet other) {
return this;
}
@Override
public Range range() {
throw new NoSuchElementException();
}
@Override
public Range range(BoundType lowerBoundType, BoundType upperBoundType) {
throw new NoSuchElementException();
}
@Override
ContiguousSet headSetImpl(C toElement, boolean inclusive) {
return this;
}
@Override
ContiguousSet subSetImpl(
C fromElement, boolean fromInclusive, C toElement, boolean toInclusive) {
return this;
}
@Override
ContiguousSet tailSetImpl(C fromElement, boolean fromInclusive) {
return this;
}
@Override
public boolean contains(@CheckForNull Object object) {
return false;
}
@GwtIncompatible // not used by GWT emulation
@Override
int indexOf(@CheckForNull Object target) {
return -1;
}
@Override
public UnmodifiableIterator iterator() {
return Iterators.emptyIterator();
}
@GwtIncompatible // NavigableSet
@Override
public UnmodifiableIterator descendingIterator() {
return Iterators.emptyIterator();
}
@Override
boolean isPartialView() {
return false;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public ImmutableList asList() {
return ImmutableList.of();
}
@Override
public String toString() {
return "[]";
}
@Override
public boolean equals(@CheckForNull Object object) {
if (object instanceof Set) {
Set> that = (Set>) object;
return that.isEmpty();
}
return false;
}
@GwtIncompatible // not used in GWT
@Override
boolean isHashCodeFast() {
return true;
}
@Override
public int hashCode() {
return 0;
}
@GwtIncompatible // serialization
private static final class SerializedForm implements Serializable {
private final DiscreteDomain domain;
private SerializedForm(DiscreteDomain domain) {
this.domain = domain;
}
private Object readResolve() {
return new EmptyContiguousSet<>(domain);
}
private static final long serialVersionUID = 0;
}
@GwtIncompatible // serialization
@Override
Object writeReplace() {
return new SerializedForm<>(domain);
}
@GwtIncompatible // NavigableSet
@Override
ImmutableSortedSet createDescendingSet() {
return ImmutableSortedSet.emptySet(Ordering.natural().reverse());
}
}