package org.kuali.student.enrollment.class1.lpr.service.aspect;
   
   
   import java.util.List;
   
   
   import org.aspectj.lang.JoinPoint;
   import org.kuali.student.r2.common.exceptions.MissingParameterException;
   import org.kuali.student.r2.common.exceptions.OperationFailedException;
  
  /**
   * 
   * @author sambit
   * 
   * @param <T> the service this aspect is operating on
   */
  public class ServiceAspects<T>  {
  
  	List<Throwable> includeThrowableClassList ;
  
  
  	public void setIncludeThrowableClassList(List <Throwable> serviceExceptionTypes) {
  		this.includeThrowableClassList = serviceExceptionTypes;
  	}
  
  	/**
  	 * @param join
  	 */
  	public void beforeInvokingService(JoinPoint join) throws Throwable{
  
  		Object[] argValues =  join.getArgs();
  
  		for(Object argValue:argValues){
  
  			if(argValue==null){
  			
  				throw new MissingParameterException("Input parameters cannot be null, one of the parameters had null value:"+argValue);
  				
  			}
  		}
  	}
  
  	/**
  	 * 
  	 * @param ex
  	 * @return
  	 * @throws Throwable
  	 */
  	public void handleExceptions(Throwable ex) throws OperationFailedException{
  
  		if (!includeThrowableClassList.contains(ex)) {
  			throw new OperationFailedException(ex.getMessage(), ex);
  		}
  	}
  
  }