MyParser.java

package compareAlgorithm;

import java.io.IOException;
import java.util.Collections;

import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceImpl;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.impl.EcoreResourceFactoryImpl;

/**
 * Class for parsing the EMF ecore files
 * 
 * @author Pratham
 * 
 */
public class MyParser {
	private String ecorePath1;
	private String ecorePath2;

	private EList<EObject> firstModel;
	private EList<EObject> secondModel;

	/**
	 * Constructor.
	 * 
	 * @param path1
	 *            first ECore file path
	 * @param path2
	 *            second ECore file path
	 * @throws IOException
	 */
	public MyParser(String path1, String path2) throws IOException {
		Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(
				"ecore", new EcoreResourceFactoryImpl());
		this.ecorePath1 = path1;
		this.ecorePath2 = path2;
	}

	/**
	 * Load the file into the ECore list
	 * 
	 * @throws IOException
	 */
	public void parseModels() throws IOException {
		this.setFirstModel(this.loadModel(this.ecorePath1));
		this.setSecondModel(this.loadModel(this.ecorePath2));
		// System.out.println("Begin Comparison....");
		// System.out.println("---------------------------");
	}

	/**
	 * Helper function to extract the contents in Ecore file
	 * 
	 * @param path
	 *            to ECore file
	 * @return EList<EObject> object
	 * @throws IOException
	 */
	private EList<EObject> loadModel(String path) throws IOException {
		ResourceSet resourceSet = new ResourceSetImpl();
		Resource res = new ResourceImpl();

		URI uri = URI.createFileURI(path);
		res = resourceSet.createResource(uri);
		res.load(Collections.emptyMap());
		EList<EObject> objList = (EList<EObject>) res.getContents();
		EObject pkg = objList.get(0);
		return pkg.eContents();
	}

	/**
	 * Returns the second model
	 * 
	 * @return EList<EObject> object
	 */
	public EList<EObject> getSecondModel() {
		return secondModel;
	}

	/**
	 * Sets the model for second model reference
	 * 
	 * @param secondModel
	 */
	public void setSecondModel(EList<EObject> secondModel) {
		this.secondModel = secondModel;
	}

	/**
	 * Returns the first model
	 * 
	 * @return EList<EObject> object
	 */
	public EList<EObject> getFirstModel() {
		return firstModel;
	}

	/**
	 * Sets the model for first model reference
	 * 
	 * @param firstModel
	 */
	public void setFirstModel(EList<EObject> firstModel) {
		this.firstModel = firstModel;
	}
}