package org.kuali.rice.krms.framework.engine;

 import java.util.List;

 import org.kuali.rice.krms.api.Action;

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

 import org.kuali.rice.krms.api.Proposition;

 import org.kuali.rice.krms.api.ResultEvent;

 import org.kuali.rice.krms.api.Rule;

 import org.kuali.rice.krms.framework.engine.result.BasicResult;

 public class BasicRule implements Rule {

         private static final ResultLogger LOG = ResultLogger.getInstance();

         private String name;

         private Proposition proposition;

         private List<Action> actions;

         public BasicRule(String name, Proposition proposition, List<Action> actions) {

                 if (proposition == null) {

                         throw new IllegalArgumentException("Propsition cannot be null.");

                 }

                 this.name = name;

                 this.proposition = proposition;

                 this.actions = actions;

         }

         public BasicRule(Proposition proposition, List<Action> actions) {

                 this(null, proposition, actions);

         }

         @Override

         public boolean evaluate(ExecutionEnvironment environment) {

                 boolean result = proposition.evaluate(environment);

                 if (actions != null) {

                         for (Action action : actions) {

                                 if (shouldExecuteAction(result)) {

                                         action.execute(environment);

                                 }

                         }

                 }

                 if (LOG.isEnabled(environment)){

                         LOG.logResult(new BasicResult(ResultEvent.RuleEvaluated, this, environment, result));

                 }

                 return result;

         }

         protected boolean shouldExecuteAction(boolean ruleExecutionResult) {

                 return ruleExecutionResult;

         }

         public String getName() {

                 return name;

         }

         public String toString(){

                 return name;

         }

 }