org.optaplanner.constraint.streams.drools.DroolsConstraintFactory Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.optaplanner.constraint.streams.drools;

import org.optaplanner.constraint.streams.common.InnerConstraintFactory;
import org.optaplanner.constraint.streams.common.RetrievalSemantics;
import org.optaplanner.constraint.streams.drools.uni.DroolsFromUniConstraintStream;
import org.optaplanner.core.api.score.stream.uni.UniConstraintStream;
import org.optaplanner.core.impl.domain.constraintweight.descriptor.ConstraintConfigurationDescriptor;
import org.optaplanner.core.impl.domain.solution.descriptor.SolutionDescriptor;

public final class DroolsConstraintFactory
        extends InnerConstraintFactory> {

    private final SolutionDescriptor solutionDescriptor;
    private final String defaultConstraintPackage;
    private final DroolsVariableFactory variableFactory = new DroolsVariableFactory();

    public DroolsConstraintFactory(SolutionDescriptor solutionDescriptor) {
        this.solutionDescriptor = solutionDescriptor;
        ConstraintConfigurationDescriptor configurationDescriptor = solutionDescriptor
                .getConstraintConfigurationDescriptor();
        if (configurationDescriptor == null) {
            Package pack = solutionDescriptor.getSolutionClass().getPackage();
            defaultConstraintPackage = (pack == null) ? "" : pack.getName();
        } else {
            defaultConstraintPackage = configurationDescriptor.getConstraintPackage();
        }
    }

    @Override
    public  UniConstraintStream forEachIncludingNullVars(Class sourceClass) {
        assertValidFromType(sourceClass);
        return new DroolsFromUniConstraintStream<>(this, sourceClass, RetrievalSemantics.STANDARD);
    }

    @Override
    public  UniConstraintStream fromUnfiltered(Class fromClass) {
        assertValidFromType(fromClass);
        return new DroolsFromUniConstraintStream<>(this, fromClass, RetrievalSemantics.LEGACY);
    }

    // ************************************************************************
    // Getters/setters
    // ************************************************************************

    @Override
    public SolutionDescriptor getSolutionDescriptor() {
        return solutionDescriptor;
    }

    public DroolsVariableFactory getVariableFactory() {
        return variableFactory;
    }

    @Override
    public String getDefaultConstraintPackage() {
        return defaultConstraintPackage;
    }

}