Re: [henshin-dev] API: how to use findMatches?

[Jens Bürger <jens.buerger@xxxxxxxxxxxxxxxxx>]

Am 18.07.2012 18:59, schrieb Christian Krause:
> > How can I make use of parameters? As far as I see, parameters are
> > applied to (in this case) a RuleApplication-object, but findMatches()
> > works directly on the engine?
>
> Since Match extends Assignment you can use the methods in Assignment to
> set parameter values. The methods in RuleApplication are just
> convinience methods which delegate to the corresponding methods in
> Assignment / Match.

So this means if I just want to find matches and do not want to really 
apply rules, it is sufficient to work on an AssignmentImpl-Object?


Based on the "Bank"-Example, I tried using an assignment but it does not 
get my any matches. I attached my sourcecode.

Thanks,

Jens

package org.eclipse.emf.henshin.examples.bank;


import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.henshin.interpreter.EGraph;
import org.eclipse.emf.henshin.interpreter.Engine;
import org.eclipse.emf.henshin.interpreter.Match;
import org.eclipse.emf.henshin.interpreter.RuleApplication;
import org.eclipse.emf.henshin.interpreter.impl.AssignmentImpl;
import org.eclipse.emf.henshin.interpreter.impl.EGraphImpl;
import org.eclipse.emf.henshin.interpreter.impl.EngineImpl;
import org.eclipse.emf.henshin.interpreter.impl.RuleApplicationImpl;
import org.eclipse.emf.henshin.model.Rule;
import org.eclipse.emf.henshin.model.TransformationSystem;
import org.eclipse.emf.henshin.model.resource.HenshinResourceSet;

public class Banktest {

	static EObject root;
	static TransformationSystem system;
	
	
	public static void transform(){
		
		// Prepare the engine:
		Engine engine = new EngineImpl();
		 
		// Initialize the graph:
		EGraph graph = new EGraphImpl();
		graph.addTree(root);
		 
		
		 
		RuleApplication application = new RuleApplicationImpl(engine);
		application.setRule(system.findRuleByName("createAccount"));
		
		// Apply the unit:
		/*
		application.setEGraph(graph);
		
		application.setParameterValue("client", "Alice");
		application.setParameterValue("accountId", "5");
		*/
		// Iterate over all matches and print them on the console:
	
		
		AssignmentImpl assignment=new AssignmentImpl(system.findRuleByName("createAccount"));
		assignment.setParameterValue((assignment.getUnit()).getParameterByName("client"), "Alice");
		assignment.setParameterValue((assignment.getUnit()).getParameterByName("accountId"), "5");
		
		for (Match match : engine.findMatches((Rule) assignment.getUnit(), graph, null)) {
		  System.out.println(match.toString());
		}
		
		//application.execute(null);
		
	/*	UnitApplication application = new UnitApplicationImpl(engine);
		application.setUnit(unit);
		application.setEGraph(graph);
		application.execute(null);*/
		
		
	}

	public static void run(){
	// Create a resource set for the working directory "my/working/directory"
	HenshinResourceSet resourceSet = new HenshinResourceSet("src/org/eclipse/emf/henshin/examples/bank");
	 
	// Load a model:
	root = resourceSet.getObject("example-bank.xmi");
	 
	// Load a transformation system:
	system = resourceSet.getTransformationSystem("bank.henshin");
	 
	transform();
	 
	// Save the result:
	resourceSet.saveObject(root, "example-bank_result.xmi");
	}
	
	public static void main(String[] args) {
		run();
	}
}