refactoring of GenerateBaseUtil

plugins/org.yakindu.sct.generator.base/src/org/yakindu/sct/generator/base/util/GeneratorBaseUtil.java

@@ -1,20 +1,36 @@
 package org.yakindu.sct.generator.base.util;
 
+import java.io.File;
 import java.io.IOException;
 import java.util.Collections;
 
+import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.Assert;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.emf.common.util.URI;
+import org.eclipse.emf.ecore.EPackage;
+import org.eclipse.emf.ecore.EcorePackage;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.emf.ecore.resource.Resource.Factory;
 import org.eclipse.emf.ecore.resource.ResourceSet;
 import org.eclipse.emf.ecore.resource.impl.ResourceFactoryRegistryImpl;
 import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
+import org.eclipse.xpand2.XpandExecutionContextImpl;
+import org.eclipse.xpand2.XpandFacade;
+import org.eclipse.xpand2.output.Outlet;
+import org.eclipse.xpand2.output.OutputImpl;
+import org.eclipse.xtend.expression.Variable;
+import org.eclipse.xtend.typesystem.emf.EmfRegistryMetaModel;
 import org.yakindu.sct.model.sexec.ExecutionFlow;
+import org.yakindu.sct.model.sexec.SexecPackage;
 import org.yakindu.sct.model.sexec.transformation.ModelSequencer;
 import org.yakindu.sct.model.sexec.transformation.SequencerModule;
+import org.yakindu.sct.model.sgraph.SGraphPackage;
 import org.yakindu.sct.model.sgraph.Statechart;
+import org.yakindu.sct.model.stext.stext.StextPackage;
 
 import com.google.inject.Guice;
 import com.google.inject.Injector;
@@ -72,4 +88,41 @@ public class GeneratorBaseUtil {
 		Assert.isNotNull(flow);
 		return flow;
 	}
+
+	/**
+	 * Invokes the Template engine to generate resources
+	 */
+	public static void generate(ExecutionFlow flow, String templatePath,
+			IProject project, String targetFolder) throws CoreException {
+
+		String absoluteTargetFolder = ResourcesPlugin.getWorkspace().getRoot()
+				.getLocation().toOSString()
+				+ File.separator
+				+ project.getFullPath().toOSString()
+				+ File.separator + targetFolder;
+
+		OutputImpl output = new OutputImpl();
+		Outlet outlet = new Outlet(absoluteTargetFolder);
+		outlet.setOverwrite(true);
+		output.addOutlet(outlet);
+
+		XpandExecutionContextImpl execCtx = new XpandExecutionContextImpl(
+				output, null, Collections.<String, Variable> emptyMap(), null,
+				null);
+		EmfRegistryMetaModel metamodel = new EmfRegistryMetaModel() {
+			@Override
+			protected EPackage[] allPackages() {
+				return new EPackage[] { SGraphPackage.eINSTANCE,
+						StextPackage.eINSTANCE, EcorePackage.eINSTANCE,
+						SexecPackage.eINSTANCE };
+			}
+		};
+		execCtx.registerMetaModel(metamodel);
+		// generate
+		XpandFacade facade = XpandFacade.create(execCtx);
+		facade.evaluate(templatePath, flow);
+		// refresh the project to get external updates:
+		project.refreshLocal(IResource.DEPTH_INFINITE,
+				new NullProgressMonitor());
+	}
 }