org.apache.hadoop.hbase.regionserver.KeyValueSkipListSet Maven / Gradle / Ivy
/**
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hbase.regionserver;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellComparator;
import org.apache.hadoop.hbase.KeyValue;
import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.NavigableSet;
import java.util.SortedSet;
import java.util.concurrent.ConcurrentNavigableMap;
import java.util.concurrent.ConcurrentSkipListMap;
/**
* A {@link java.util.Set} of {@link KeyValue}s implemented on top of a
* {@link java.util.concurrent.ConcurrentSkipListMap}. Works like a
* {@link java.util.concurrent.ConcurrentSkipListSet} in all but one regard:
* An add will overwrite if already an entry for the added key. In other words,
* where CSLS does "Adds the specified element to this set if it is not already
* present.", this implementation "Adds the specified element to this set EVEN
* if it is already present overwriting what was there previous". The call to
* add returns true if no value in the backing map or false if there was an
* entry with same key (though value may be different).
* Otherwise,
* has same attributes as ConcurrentSkipListSet: e.g. tolerant of concurrent
* get and set and won't throw ConcurrentModificationException when iterating.
*/
public class KeyValueSkipListSet implements NavigableSet {
private final ConcurrentNavigableMap delegatee;
KeyValueSkipListSet(final CellComparator c) {
this.delegatee = new ConcurrentSkipListMap(c);
}
KeyValueSkipListSet(final ConcurrentNavigableMap m) {
this.delegatee = m;
}
public Cell ceiling(Cell e) {
throw new UnsupportedOperationException("Not implemented");
}
public Iterator descendingIterator() {
return this.delegatee.descendingMap().values().iterator();
}
public NavigableSet descendingSet() {
throw new UnsupportedOperationException("Not implemented");
}
public Cell floor(Cell e) {
throw new UnsupportedOperationException("Not implemented");
}
public SortedSet headSet(final Cell toElement) {
return headSet(toElement, false);
}
public NavigableSet headSet(final Cell toElement,
boolean inclusive) {
return new KeyValueSkipListSet(this.delegatee.headMap(toElement, inclusive));
}
public KeyValue higher(Cell e) {
throw new UnsupportedOperationException("Not implemented");
}
public Iterator iterator() {
return this.delegatee.values().iterator();
}
public Cell lower(Cell e) {
throw new UnsupportedOperationException("Not implemented");
}
public Cell pollFirst() {
throw new UnsupportedOperationException("Not implemented");
}
public Cell pollLast() {
throw new UnsupportedOperationException("Not implemented");
}
public SortedSet subSet(Cell fromElement, Cell toElement) {
throw new UnsupportedOperationException("Not implemented");
}
public NavigableSet subSet(Cell fromElement,
boolean fromInclusive, Cell toElement, boolean toInclusive) {
throw new UnsupportedOperationException("Not implemented");
}
public SortedSet tailSet(Cell fromElement) {
return tailSet(fromElement, true);
}
public NavigableSet tailSet(Cell fromElement, boolean inclusive) {
return new KeyValueSkipListSet(this.delegatee.tailMap(fromElement, inclusive));
}
public Comparator comparator() {
throw new UnsupportedOperationException("Not implemented");
}
public Cell first() {
return this.delegatee.get(this.delegatee.firstKey());
}
public Cell last() {
return this.delegatee.get(this.delegatee.lastKey());
}
public boolean add(Cell e) {
return this.delegatee.put(e, e) == null;
}
public boolean addAll(Collection c) {
throw new UnsupportedOperationException("Not implemented");
}
public void clear() {
this.delegatee.clear();
}
public boolean contains(Object o) {
//noinspection SuspiciousMethodCalls
return this.delegatee.containsKey(o);
}
public boolean containsAll(Collection c) {
throw new UnsupportedOperationException("Not implemented");
}
public boolean isEmpty() {
return this.delegatee.isEmpty();
}
public boolean remove(Object o) {
return this.delegatee.remove(o) != null;
}
public boolean removeAll(Collection c) {
throw new UnsupportedOperationException("Not implemented");
}
public boolean retainAll(Collection c) {
throw new UnsupportedOperationException("Not implemented");
}
public Cell get(Cell kv) {
return this.delegatee.get(kv);
}
public int size() {
return this.delegatee.size();
}
public Object[] toArray() {
throw new UnsupportedOperationException("Not implemented");
}
public T[] toArray(T[] a) {
throw new UnsupportedOperationException("Not implemented");
}
}
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