/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.krms.framework.engine;

 import org.kuali.rice.krms.api.engine.ExecutionEnvironment;

 public final class BasicAgendaTreeEntry implements AgendaTreeEntry {

         private final Rule rule;

         private final AgendaTree ifTrue;

         private final AgendaTree ifFalse;

         public BasicAgendaTreeEntry(Rule rule) {

                 this(rule, null, null);

         }

         public BasicAgendaTreeEntry(Rule rule, AgendaTree ifTrue, AgendaTree ifFalse) {

                 if (rule == null) {

                         throw new IllegalArgumentException("rule was null");

                 }

                 this.rule = rule;

                 this.ifTrue = ifTrue;

                 this.ifFalse = ifFalse;

         }

         @Override

         public void execute(ExecutionEnvironment environment) {

                 boolean result = rule.evaluate(environment);

                 if (result && ifTrue != null) {

                         ifTrue.execute(environment);

                 }

                 if (!result && ifFalse != null) {

                         ifFalse.execute(environment);

                 }

         }

 }