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Small Java annotation-based event-condition-action rule engine.

There is a newer version: 4.0.267

package jadex.rules.eca;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import jadex.commons.IMethodParameterGuesser;
import jadex.commons.SimpleMethodParameterGuesser;
import jadex.commons.SimpleParameterGuesser;
import jadex.commons.Tuple2;
import jadex.commons.future.DelegationResultListener;
import jadex.commons.future.Future;
import jadex.commons.future.IFuture;

/**
 *  Condition implementation that invokes a predefined method.
 */
public class MethodCondition implements ICondition
{
	//-------- attributes --------
	
	/** The object. */
	protected Object object;
	
	/** The method. */
	protected Method method;
	
	/** The invert flag. Inverts method result. */
	protected boolean invert;
	
	/** The parameter guesser. */
	protected IMethodParameterGuesser guesser;
	
	//-------- constructors --------
	
	/**
	 *  Create a new method condition.
	 */
	public MethodCondition(Object object, Method method)
	{
		this(object, method, false);
	}
	
	/**
	 *  Create a new method condition.
	 */
	public MethodCondition(Object object, Method method, IMethodParameterGuesser guesser)
	{
		this(object, method, false, guesser);
	}
	
	/**
	 *  Create a new method condition.
	 */
	public MethodCondition(Object object, Method method, boolean invert)
	{
		this(object, method, invert, null);
	}
	
	/**
	 *  Create a new method condition.
	 */
	public MethodCondition(Object object, Method method, boolean invert, 
		IMethodParameterGuesser guesser)
	{
//		if(object==null)
//			System.out.println("hetre");
		
		this.object = object;
		this.method = method;
		this.invert = invert;
		this.guesser = guesser;
	}

	//-------- methods --------

	/**
	 *  Evaluate the condition.
	 */
	public IFuture> evaluate(IEvent event)
	{
		Future> fut = new Future>();
		try
		{
			CommandCondition.evaluateResult(invokeMethod(event)).addResultListener(new DelegationResultListener>(fut)
			{
				public void customResultAvailable(Tuple2 result)
				{
					if(invert)
					{
						Boolean b = result.getFirstEntity().booleanValue()? Boolean.FALSE: Boolean.TRUE;
						result = new Tuple2(b, result.getSecondEntity());
					}
					
					super.customResultAvailable(result);
				}
			});
		}
		catch(Exception e)
		{
			fut.setException(e);			
			//throw SUtil.throwUnchecked(e);
		}
		return fut;
	}
	
	/**
	 *  Do the method invocation.
	 */
	protected Object invokeMethod(IEvent event)	throws Exception
	{
		method.setAccessible(true);
		Object[] params = null;
		List