CollectionFactory.java

/**
 * 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 io.dstream.support;

import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * A general factory strategy to supply implementation of standard 
 * collections.
 *
 */
public interface CollectionFactory {

	/**
	 * Returns new instance of {@link List}
	 * 
	 * @return new instance of {@link List}
	 */
	<T> List<T> newList();
	
	/**
	 * Returns new instance of {@link Map}
	 * 
	 * @return new instance of {@link Map}
	 */
	<K,V> Map<K,V> newMap();
	
	/**
	 * Returns new instance of {@link Set}
	 * 
	 * @return new instance of {@link Set}
	 */
	<T> Set<T> newSet();
}