/**
    * 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);
  		}
  	}
  	
  }