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/**
 * Copyright (C) 2016 LibRec
 * 
 * This file is part of LibRec.
 * LibRec is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 

 * LibRec is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with LibRec. If not, see .
 */
package net.librec.similarity;

import net.librec.data.DataModel;
import net.librec.math.structure.SymmMatrix;

/**
 * Recommender Similarity
 *
 * @author WangYuFeng
 */
public interface RecommenderSimilarity {

    /**
     * build and compute similarity matrix by dataModel
     *
     * @param dataModel data model
     */
    void buildSimilarityMatrix(DataModel dataModel);

    /**
     * get similarity matrix as a SymmMatrix
     *
     * @return Similarity Matrix
     */
    SymmMatrix getSimilarityMatrix();
}