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The Jadex BPMN kernel provides a workflow kernel for the standardized business process modeling notation. The kernel relies on annotated BPMN diagrams, which include detailed execution information.

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package jadex.bpmn;

import java.net.URL;

import jadex.bpmn.model.MBpmnModel;
import jadex.bpmn.model.io.SBpmnModelReader;
import jadex.bridge.IComponentIdentifier;
import jadex.bridge.IResourceIdentifier;
import jadex.bridge.LocalResourceIdentifier;
import jadex.bridge.ResourceIdentifier;
import jadex.bridge.modelinfo.ModelInfo;
import jadex.commons.AbstractModelLoader;
import jadex.commons.ICacheableModel;
import jadex.commons.ResourceInfo;
import jadex.commons.SUtil;

/**
 *  Loader for eclipse STP BPMN models (.bpmn files).
 */
public class BpmnModelLoader extends AbstractModelLoader
{
	//-------- constants --------
	
	/** The BPMN file extension. */
	public static final String	FILE_EXTENSION_BPMN	= ".bpmn";
	
	/** The BPMN 2 file extension. */
	public static final String	FILE_EXTENSION_BPMN2	= ".bpmn2";
	
	//-------- constructors --------
	
	/**
	 *  Create a new BPMN model loader.
	 */
	public BpmnModelLoader()
	{
		super(new String[]{FILE_EXTENSION_BPMN, FILE_EXTENSION_BPMN2});
	}

	//-------- methods --------
	
	/**
	 *  Load a BPMN model.
	 *  @param name	The filename or logical name (resolved via imports and extensions).
	 *  @param imports	The imports, if any.
	 */
	public MBpmnModel	loadBpmnModel(String name, String[] imports, ClassLoader classloader, Object context) throws Exception
	{
		String ext = FILE_EXTENSION_BPMN;
		if(name.endsWith(".bpmn2"))
		{
			ext = FILE_EXTENSION_BPMN2;
		}
		MBpmnModel	ret	= (MBpmnModel)loadModel(name, ext, imports, classloader, classloader, context);	// Todo RID as clkey
		ret.setClassLoader(classloader);
		return ret;
	}
	
	//-------- AbstractModelLoader methods --------
		
	/**
	 *  Load a model.
	 *  @param name	The original name (i.e. not filename).
	 *  @param info	The resource info.
	 */
	protected ICacheableModel doLoadModel(String name, String[] imports, ResourceInfo info, 
		ClassLoader classloader, Object context) throws Exception
	{	
		if (name != null && name.endsWith(".bpmn2"))
		{
			MBpmnModel model = SBpmnModelReader.readModel(info.getInputStream(), info.getFilename(), null, classloader);
			IResourceIdentifier rid = (IResourceIdentifier)((Object[])context)[0];
			if(rid==null)
			{
				String src = SUtil.getCodeSource(info.getFilename(), ((ModelInfo)model.getModelInfo()).getPackage());
				URL url = SUtil.toURL(src);
				rid = new ResourceIdentifier(new LocalResourceIdentifier((IComponentIdentifier)((Object[])context)[1], url), null);
			}
			model.setResourceIdentifier(rid);
			model.initModelInfo(classloader);
			((ModelInfo)model.getModelInfo()).setType(BpmnFactory.FILETYPE_BPMNPROCESS);
			return model;
		}
		return (ICacheableModel)BpmnXMLReader.read(info, classloader, (IResourceIdentifier)((Object[])context)[0],
			(IComponentIdentifier)((Object[])context)[1]);
	}
}