DiscreteEvaluatorCoreWrapper.java

/*
 * Copyright 2011 JBoss Inc
 *
 * 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 org.drools.chance.rule.constraint.core.evaluators;

import org.drools.chance.rule.constraint.core.ConstraintCore;
import org.drools.chance.rule.constraint.core.connectives.ConnectiveCore;
import org.drools.chance.degree.Degree;
import org.drools.chance.distribution.DiscreteDomainDistribution;
import org.drools.chance.distribution.Distribution;

import java.util.Iterator;


public class DiscreteEvaluatorCoreWrapper implements ConstraintCore {

    private ConstraintCore core;

    private ConnectiveCore and;
    private ConnectiveCore or;

    private Degree master;


    public DiscreteEvaluatorCoreWrapper( ConstraintCore core, ConnectiveCore and, ConnectiveCore or, Degree master) {
        this.core = core;
        this.and = and;
        this.or = or;
        this.master = master;
    }

    public Degree eval(Object left, Object right) {
    	Distribution dist1 = (Distribution) left;
    	Distribution dist2 = (Distribution) right;
        Degree acc = master.False();

        Iterator iter1 = ((DiscreteDomainDistribution) dist1).iterator();
        while (iter1.hasNext()) {
            Iterator iter2 = ((DiscreteDomainDistribution) dist2).iterator();
            Object x = iter1.next();
            while (iter2.hasNext()) {
                Object y = iter2.next();
                acc = or.eval(acc, and.eval(dist1.getDegree(x),dist2.getDegree(y),core.eval(x,y)));
            }
        }
        return acc;
    }

    public Degree eval(Object obj) {
        Distribution dist = (Distribution) obj;
        Degree acc = master.False();

        Iterator iter = ((DiscreteDomainDistribution) dist).iterator();
        while (iter.hasNext()) {
            Object x = iter.next();
            acc = or.eval(acc, and.eval(dist.getDegree(x),core.eval(x)));
        }
        return acc;
    }

    public Degree eval(Object... objs) {
        //TODO
        throw new UnsupportedOperationException("TODO");
    }

    public boolean isUnary() {
        return core.isUnary();
    }

    public boolean isBinary() {
        return core.isBinary();
    }

    public boolean isNary() {
        return core.isNary();
    }
}