/*
* Copyright (c) 2011-2015 EPFL DATA Laboratory
* Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
*
* All rights reserved.
*
* 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 ch.epfl.data.squall.ewh.algorithms;
import ch.epfl.data.squall.ewh.algorithms.optimality.WeightFunction;
import ch.epfl.data.squall.ewh.data_structures.Region;
public interface WeightPrecomputation {
public WeightFunction getWeightFunction();
// prefix sum dimension
public int getXSize();
public int getYSize();
public double getWeight(Region region);
public int getFrequency(Region region);
// according to the matrix, not on the join condition
// for join condition, look at Coarsener
public boolean isEmpty(Region region);
public int getTotalFrequency();
public int getMinHalfPerimeterForWeight(double maxWeight);
public int getPrefixSum(int x, int y); // necessary for
// PWeightPrecomputation
}