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+/*
+ fuzzylite (R), a fuzzy logic control library in C++.
+ Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
+ Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the FuzzyLite License included with the software.
+
+ You should have received a copy of the FuzzyLite License along with
+ fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
+
+ fuzzylite is a registered trademark of FuzzyLite Limited.
+ */
+
+#ifndef FL_LOWEST_H
+#define FL_LOWEST_H
+
+#include "fl/fuzzylite.h"
+
+#include "fl/activation/Activation.h"
+
+namespace fl {
+
+    /**
+      The Lowest class is a RuleBlock Activation method that activates a given
+      number of rules with lowest activation degrees in ascending order
+
+      @author Juan Rada-Vilela, Ph.D.
+      @see Highest
+      @see Rule
+      @see RuleBlock
+      @see ActivationFactory
+      @since 6.0
+     */
+    class FL_API Lowest : public Activation {
+    private:
+        int _numberOfRules;
+    public:
+        explicit Lowest(int numberOfRules = 1);
+        virtual ~Lowest();
+        FL_DEFAULT_COPY_AND_MOVE(Lowest)
+
+        virtual std::string className() const FL_IOVERRIDE;
+
+        /**
+          Returns the number of rules to activate
+          @return number of rules to activate
+         */
+        virtual std::string parameters() const FL_IOVERRIDE;
+
+        /**
+          Configures the activation method with the number of rules to activate
+          @param parameters contains the number of rules to activate
+         */
+        virtual void configure(const std::string& parameters) FL_IOVERRIDE;
+
+        /**
+          Sets the number of rules to activate
+          @param numberOfRules is the number of rules to activate
+         */
+        virtual void setNumberOfRules(int numberOfRules);
+
+        /**
+          Returns the number of rules to activate
+          @return the number of rules to activate
+         */
+        virtual int getNumberOfRules() const;
+
+
+        virtual Complexity complexity(const RuleBlock* ruleBlock) const FL_IOVERRIDE;
+
+        /**
+          Activates the rules with the lowest activation degrees in the given
+          rule block
+          @param ruleBlock is the rule block to activate
+         */
+        virtual void activate(RuleBlock* ruleBlock) FL_IOVERRIDE;
+
+        virtual Lowest* clone() const FL_IOVERRIDE;
+
+        static Activation* constructor();
+    };
+}
+
+#endif /* FL_LOWEST_H */