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Jadex bridge is a base package for kernels and platforms, i.e., it is used by both and provides commonly used interfaces and classes for active components and their management.
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package jadex.bridge.component.impl;

import java.util.ArrayList;
import java.util.List;

import jadex.bridge.IComponentStep;
import jadex.bridge.IInternalAccess;
import jadex.bridge.component.ComponentCreationInfo;
import jadex.bridge.component.IComponentFeatureFactory;
import jadex.bridge.component.IExecutionFeature;
import jadex.bridge.component.ILifecycleComponentFeature;
import jadex.bridge.modelinfo.ConfigurationInfo;
import jadex.bridge.modelinfo.UnparsedExpression;
import jadex.bridge.service.component.IRequiredServicesFeature;
import jadex.commons.future.CounterResultListener;
import jadex.commons.future.DelegationResultListener;
import jadex.commons.future.Future;
import jadex.commons.future.IFuture;
import jadex.commons.future.IResultListener;
import jadex.javaparser.SJavaParser;

/**
 *  Feature that ensures the agent created(), body() and killed() are called on the pojo. 
 */
public class ComponentLifecycleFeature extends	AbstractComponentFeature implements ILifecycleComponentFeature
{
	//-------- constants --------
	
	/** The factory. */
	public static final IComponentFeatureFactory FACTORY = new ComponentFeatureFactory(ILifecycleComponentFeature.class, ComponentLifecycleFeature.class,
		new Class[]{IRequiredServicesFeature.class}, null, false);
	
	//-------- methods --------
	
	/**
	 *  Factory method constructor for instance level.
	 */
	public ComponentLifecycleFeature(IInternalAccess component, ComponentCreationInfo cinfo)
	{
		super(component, cinfo);
	}
	
	/**
	 *  Run body on separate thread if there are initial (user) steps in model. 
	 */
	@Override
	public boolean hasUserBody()
	{
		UnparsedExpression[]	upes	= getInitialSteps();		
		return upes!=null && upes.length>0;
	}

	/**
	 *  Execute the functional body of the component.
	 *  Is only called once.
	 */
	public IFuture body()
	{
		IFuture	ret;
		
		UnparsedExpression[]	upes	= getInitialSteps();		
		if(upes!=null && upes.length>0)
		{
			Future	fut	= new Future();
			ret	= fut;
			List	steps	= new ArrayList();
			
			for(int i=0; !fut.isDone() && i clazz = upes[i].getClazz().getType(getComponent().getClassLoader(), getComponent().getModel().getAllImports());
					try
					{
						step	= clazz.newInstance();
					}
					catch(Exception e)
					{
						fut.setException(e);
					}
				}
				
				if(step instanceof IComponentStep)
				{
					steps.add((IComponentStep)step);
				}
				else if(step!=null)
				{
					fut.setException(new RuntimeException("Unsupported initial component step, class="+upes[i].getClazz()+", value="+upes[i].getValue()));
				}
			}
			
			if(!fut.isDone())
			{
				IResultListener	crl	= new CounterResultListener(steps.size(), new DelegationResultListener(fut)
					{
					@Override
					public void exceptionOccurred(Exception exception)
					{
						super.exceptionOccurred(exception);
					}
					});
				for(IComponentStep step: steps)
				{
					getComponent().getFeature(IExecutionFeature.class).scheduleStep(step)
						.addResultListener(crl);
				}
			}
		}
		else
		{
			ret = IFuture.DONE;
		}

		return ret;
	}

	/**
	 *  Called just before the component is removed from the platform.
	 */
	public IFuture shutdown()
	{
		IFuture	ret	= IFuture.DONE;
		
		ConfigurationInfo	ci	= getComponent().getConfiguration()!=null
			? getComponent().getModel().getConfiguration(getComponent().getConfiguration())
			: getComponent().getModel().getConfigurations().length>0 ? getComponent().getModel().getConfigurations()[0] : null;
		
		if(ci!=null)
		{
			UnparsedExpression[]	upes	= ci.getEndSteps();
			if(upes.length>0)
			{
				Future	fut	= new Future();
				ret	= fut;
				List	steps	= new ArrayList();
				
				for(int i=0; !fut.isDone() && i clazz = upes[i].getClazz().getType(getComponent().getClassLoader(), getComponent().getModel().getAllImports());
						try
						{
							step	= clazz.newInstance();
						}
						catch(Exception e)
						{
							fut.setException(e);
						}
					}
					
					if(step instanceof IComponentStep)
					{
						steps.add((IComponentStep)step);
					}
					else if(step!=null)
					{
						fut.setException(new RuntimeException("Unsupported component end step, class="+upes[i].getClazz()+", value="+upes[i].getValue()));
					}
				}
				
				if(!fut.isDone())
				{
					IResultListener	crl	= new CounterResultListener(steps.size(), new DelegationResultListener(fut));
					for(IComponentStep step: steps)
					{
						getComponent().getFeature(IExecutionFeature.class).scheduleStep(step)
							.addResultListener(crl);
					}
				}
			}
		}
		
		return ret;
	}
	
	/**
	 *  Get the initial steps from the model.
	 */
	protected UnparsedExpression[]	getInitialSteps()
	{
		ConfigurationInfo	ci	= getComponent().getConfiguration()!=null
			? getComponent().getModel().getConfiguration(getComponent().getConfiguration())
			: getComponent().getModel().getConfigurations().length>0 ? getComponent().getModel().getConfigurations()[0] : null;
		
		return ci!=null ? ci.getInitialSteps() : null;
	}
}