gistfile1.txt

import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;

import org.kie.api.KieBaseConfiguration;
import org.kie.api.definition.type.FactType;
import org.kie.api.io.ResourceType;
import org.kie.internal.KnowledgeBase;
import org.kie.internal.KnowledgeBaseFactory;
import org.kie.internal.builder.KnowledgeBuilder;
import org.kie.internal.builder.KnowledgeBuilderConfiguration;
import org.kie.internal.builder.KnowledgeBuilderFactory;
import org.kie.internal.io.ResourceFactory;
import org.kie.internal.runtime.StatefulKnowledgeSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MainApp4 {

    private static final Logger logger = LoggerFactory.getLogger(MainApp4.class);

    public static void main(String[] args) throws Exception {
        Knowledge kie = new Knowledge();
        kie.build();
    }

    static protected StatefulKnowledgeSession createKnowledgeSession(KnowledgeBase kbase) {
        return kbase.newStatefulKnowledgeSession();
    }

    public static class Knowledge {

        public void build() throws Exception {

            URL jarPath = new File("model/target/model-1.0-SNAPSHOT.jar").toURI().toURL();

            ClassLoader loader = new URLClassLoader(
                    new URL[] { jarPath },
                    ClassLoader.getSystemClassLoader());

            KnowledgeBuilderConfiguration kBuilderConfiguration
                    = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null, loader);
            KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(kBuilderConfiguration);

            KieBaseConfiguration kbaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, loader);

            kbuilder.add(ResourceFactory.newClassPathResource("changeset.xml",
                    getClass()),
                    ResourceType.CHANGE_SET);

            KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
            kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
            StatefulKnowledgeSession kse = createKnowledgeSession(kbase);

            FactType loanType = kbase.getFactType("mortgages","LoanApplication");
            FactType applicantType = kbase.getFactType("mortgages","Applicant");
            FactType incomeType = kbase.getFactType("mortgages", "IncomeSource");
            logger.info(">> FactTypes created for LoanApplication, Applicant, IncomeSource");

            Object loan = loanType.newInstance();
            loanType.set(loan, "amount", 200000);
            loanType.set(loan, "deposit", 1500);
            loanType.set(loan, "lengthYears", 30);

            Object applicant = applicantType.newInstance();
            applicantType.set(applicant,"name","charles");
            // applicantType.set(applicant,"creditRating","OK");
            // applicantType.set(applicant,"creditRating","Sub prime");
            applicantType.set(applicant,"age",35);

            Object income = incomeType.newInstance();
            // incomeType.set(income, "type", "Job");
            incomeType.set(income, "type", "Asset");
            incomeType.set(income, "amount", 65000);

            logger.info(">> Objects instantiated");

            kse.insert(loan);
            kse.insert(applicant);
            kse.insert(income);
            logger.info(">> Facts added to the Session");

            kse.fireAllRules();
            logger.info(">> Rules fired");
            logger.info("The loan application is now:\n" + loan);


        }
    }

}