/*
 * Copyright 2010 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.core;

import org.drools.core.beliefsystem.BeliefSystem;
import org.drools.core.beliefsystem.jtms.JTMSBeliefSystem;
import org.drools.core.beliefsystem.simple.SimpleBeliefSystem;
import org.drools.core.common.NamedEntryPoint;
import org.drools.core.common.TruthMaintenanceSystem;

/**
 * This enum represents all engine supported clocks
 */
public enum BeliefSystemType {

    SIMPLE("simple"),
    JTMS("jtms"),
    DEFEASIBLE("defeasible");

    private String string;
    BeliefSystemType( String string ) {
        this.string = string;
    }
    
    public String toExternalForm() {
        return this.string;
    }
    
    public String toString() {
        return this.string;
    }
    
    public String getId() {
        return this.string;
    }
    
    public static BeliefSystemType resolveBeliefSystemType(String id) {
        if( SIMPLE.getId().equalsIgnoreCase( id ) ) {
            return SIMPLE;
        } else if( JTMS.getId().equalsIgnoreCase( id ) ) {
            return JTMS;
        }
        throw new IllegalArgumentException( "Illegal enum value '" + id + "' for BeliefSystem" );
    }

}

@@ -1609,16 +1609,112 @@
 n JTMS;%0A
+        %7D else if( DEFEASIBLE.getId().equalsIgnoreCase( id ) ) %7B%0A            return DEFEASIBLE;%0A
         

Support "Defeasible" rules in Drools