/*
* Copyright (C) 2012 Facebook, Inc.
*
* 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.collections.specialized;
import com.facebook.collections.SetFactory;
public class LongHashSetFactory implements SetFactory<Long, SnapshotableSet<Long>> {
public static final int DEFAULT_INITIAL_SIZE = 4;
public static final int DEFAULT_MAX_SIZE = 8000;
private final int initialSize;
private final int maxSetSize;
public LongHashSetFactory(int initialSize, int maxSetSize) {
this.initialSize = initialSize;
this.maxSetSize = maxSetSize;
}
public LongHashSetFactory(int maxSetSize) {
this(DEFAULT_INITIAL_SIZE, maxSetSize);
}
public static LongHashSetFactory withInitialSize(int initialSize) {
return new LongHashSetFactory(initialSize, DEFAULT_MAX_SIZE);
}
public static LongHashSetFactory withMaxSize(int maxSize) {
return new LongHashSetFactory(DEFAULT_INITIAL_SIZE, maxSize);
}
@Override
public SnapshotableSet<Long> create() {
// we don't want more than 20% of maxSetSize allocated
return new LongHashSet(initialSize, (int)((1.2f)*maxSetSize));
}
}