com.facebook.presto.jdbc.internal.guava.collect.AbstractNavigableMap Maven / Gradle / Ivy
/*
* Copyright (C) 2012 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.facebook.presto.jdbc.internal.guava.collect;
import com.facebook.presto.jdbc.internal.guava.annotations.GwtIncompatible;
import com.facebook.presto.jdbc.internal.guava.collect.Maps.IteratorBasedAbstractMap;
import java.util.Iterator;
import java.util.NavigableMap;
import java.util.NavigableSet;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.SortedMap;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* Skeletal implementation of {@link NavigableMap}.
*
* @author Louis Wasserman
*/
@GwtIncompatible
abstract class AbstractNavigableMap extends IteratorBasedAbstractMap
implements NavigableMap {
@Override
public abstract @Nullable V get(@Nullable Object key);
@Override
public @Nullable Entry firstEntry() {
return Iterators.getNext(entryIterator(), null);
}
@Override
public @Nullable Entry lastEntry() {
return Iterators.getNext(descendingEntryIterator(), null);
}
@Override
public @Nullable Entry pollFirstEntry() {
return Iterators.pollNext(entryIterator());
}
@Override
public @Nullable Entry pollLastEntry() {
return Iterators.pollNext(descendingEntryIterator());
}
@Override
public K firstKey() {
Entry entry = firstEntry();
if (entry == null) {
throw new NoSuchElementException();
} else {
return entry.getKey();
}
}
@Override
public K lastKey() {
Entry entry = lastEntry();
if (entry == null) {
throw new NoSuchElementException();
} else {
return entry.getKey();
}
}
@Override
public @Nullable Entry lowerEntry(K key) {
return headMap(key, false).lastEntry();
}
@Override
public @Nullable Entry floorEntry(K key) {
return headMap(key, true).lastEntry();
}
@Override
public @Nullable Entry ceilingEntry(K key) {
return tailMap(key, true).firstEntry();
}
@Override
public @Nullable Entry higherEntry(K key) {
return tailMap(key, false).firstEntry();
}
@Override
public K lowerKey(K key) {
return Maps.keyOrNull(lowerEntry(key));
}
@Override
public K floorKey(K key) {
return Maps.keyOrNull(floorEntry(key));
}
@Override
public K ceilingKey(K key) {
return Maps.keyOrNull(ceilingEntry(key));
}
@Override
public K higherKey(K key) {
return Maps.keyOrNull(higherEntry(key));
}
abstract Iterator> descendingEntryIterator();
@Override
public SortedMap subMap(K fromKey, K toKey) {
return subMap(fromKey, true, toKey, false);
}
@Override
public SortedMap headMap(K toKey) {
return headMap(toKey, false);
}
@Override
public SortedMap tailMap(K fromKey) {
return tailMap(fromKey, true);
}
@Override
public NavigableSet navigableKeySet() {
return new Maps.NavigableKeySet<>(this);
}
@Override
public Set keySet() {
return navigableKeySet();
}
@Override
public NavigableSet descendingKeySet() {
return descendingMap().navigableKeySet();
}
@Override
public NavigableMap descendingMap() {
return new DescendingMap();
}
private final class DescendingMap extends Maps.DescendingMap {
@Override
NavigableMap forward() {
return AbstractNavigableMap.this;
}
@Override
Iterator> entryIterator() {
return descendingEntryIterator();
}
}
}
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