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//               The Next Generation Logic Library                       //
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//  Copyright 2015-20xx Christoph Zengler                                //
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//  Licensed under the Apache License, Version 2.0 (the "License");      //
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package org.logicng.cardinalityconstraints;

import org.logicng.datastructures.EncodingResult;
import org.logicng.formulas.Variable;

/**
 * Encodes that exactly 'rhs' variables can be assigned value true.  Uses the totalizer encoding for
 * translating the cardinality constraint into CNF.
 * @version 2.0.0
 * @since 1.1
 */
public final class CCEXKTotalizer implements CCExactlyK {

    private final CCTotalizer totalizer;

    /**
     * Constructs a new totalizer.
     */
    CCEXKTotalizer() {
        this.totalizer = new CCTotalizer();
    }

    @Override
    public void build(final EncodingResult result, final Variable[] vars, final int rhs) {
        this.totalizer.buildEXK(result, vars, rhs);
    }

    @Override
    public CCIncrementalData incrementalData() {
        return this.totalizer.incrementalData();
    }

    @Override
    public String toString() {
        return this.getClass().getSimpleName();
    }
}