/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.pact.runtime.sort;
/**
*/
public interface IndexedSortable {
/**
* Compare items at the given addresses consistent with the semantics of
* {@link java.util.Comparator#compare(Object, Object)}.
*/
int compare(int i, int j);
/**
* Swap items at the given addresses.
*/
void swap(int i, int j);
/**
* Gets the number of elements in the sortable.
*
* @return The number of elements.
*/
int size();
}