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Java-based middleware for in-memory processing of big data in a distributed environment.
/*
* 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.ignite.internal.util;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import org.apache.ignite.internal.util.tostring.GridToStringExclude;
import org.apache.ignite.internal.util.typedef.internal.A;
import org.apache.ignite.internal.util.typedef.internal.S;
/**
* Set implementation that delegates to map.
*/
public class GridSetWrapper extends GridSerializableSet {
/** */
private static final long serialVersionUID = 0L;
/** Dummy value. */
protected static final Object VAL = Boolean.TRUE;
/** Base map. */
@GridToStringExclude
protected Map map;
/**
* Creates new set based on the given map.
*
* @param map Map to be used for set implementation.
*/
public GridSetWrapper(Map map) {
A.notNull(map, "map");
this.map = (Map)map;
}
/**
* Creates new set based on the given map and initializes
* it with given values.
*
* @param map Map to be used for set implementation.
* @param initVals Initial values.
*/
public GridSetWrapper(Map map, Collection initVals) {
this(map);
addAll(initVals);
}
/**
* Provides default map value to child classes.
*
* @return Default map value.
*/
protected final Object defaultValue() {
return VAL;
}
/**
* Gets wrapped map.
*
* @return Wrapped map.
*/
protected final > T map() {
return (T)map;
}
/** {@inheritDoc} */
@Override public boolean add(E e) {
return map.put(e, VAL) == null;
}
/** {@inheritDoc} */
@Override public Iterator iterator() {
return map.keySet().iterator();
}
/** {@inheritDoc} */
@Override public int size() {
return map.size();
}
/** {@inheritDoc} */
@Override public boolean isEmpty() {
return map.isEmpty();
}
/** {@inheritDoc} */
@SuppressWarnings({"SuspiciousMethodCalls"})
@Override public boolean contains(Object o) {
return map.containsKey(o);
}
/** {@inheritDoc} */
@Override public Object[] toArray() {
return map.keySet().toArray();
}
/** {@inheritDoc} */
@SuppressWarnings({"SuspiciousToArrayCall"})
@Override public T[] toArray(T[] a) {
return map.keySet().toArray(a);
}
/** {@inheritDoc} */
@Override public boolean remove(Object o) {
return map.remove(o) != null;
}
/** {@inheritDoc} */
@Override public void clear() {
map.clear();
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(GridSetWrapper.class, this, "elements", map.keySet());
}
}