LocalStrategy.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 org.apache.flink.runtime.operators.util;

/**
 * Enumeration of all available local processing strategies tasks. 
 */
public enum LocalStrategy
{
	// no special local strategy is applied
	NONE(false, false),
	// the input is sorted
	SORT(true, true),
	// the input is sorted, during sorting a combiner is applied
	COMBININGSORT(true, true);
	
	// --------------------------------------------------------------------------------------------
	
	private final boolean dams;
	
	private boolean requiresComparator;

	private LocalStrategy(boolean dams, boolean requiresComparator) {
		this.dams = dams;
		this.requiresComparator = requiresComparator;
	}
	
	public boolean dams() {
		return this.dams;
	}
	
	public boolean requiresComparator() {
		return this.requiresComparator;
	}
}