plugins/org.eclipse.viatra2.editor/src/org/eclipse/viatra2/treeeditor/properties/util/LegacyHelper.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Istvan Rath - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.treeeditor.properties.util;

import java.util.HashSet;
import java.util.Iterator;

import org.eclipse.viatra2.core.IModelElement;
import org.eclipse.viatra2.core.IModelManager;

public class LegacyHelper {

	/**
	 * Returns a modelelement's instances as a ; delimited string.
	 * 
	 * @param e
	 *            the modelelement whose instances we want
	 * @return the instances as a ; delimited string
	 */
	public static String getInstancesAsString(IModelElement e) {
		String r = "";
		Iterator i = e.getInstances().iterator();
		while (i.hasNext()) {
			r += ((IModelElement) i.next()).getFullyQualifiedName();
			if (i.hasNext())
				r += "; ";
		}
		return r;
	}

	/**
	 * Returns a modelelement's subtypes as a ; delimited string.
	 * 
	 * @param e
	 *            the modelelement whose subtypes we want
	 * @return the subtypes as a ; delimited string
	 */
	public static String getSubtypesAsString(IModelElement e) {
		String r = "";
		Iterator i = e.getSubtypes().iterator();
		while (i.hasNext()) {
			r += ((IModelElement) i.next()).getFullyQualifiedName();
			if (i.hasNext())
				r += "; ";
		}
		return r;
	}

	/**
	 * Returns a modelelement's supertypes as a ; delimited string.
	 * 
	 * @param e
	 *            the modelelement whose supertypes we want
	 * @return the supertypes as a ; delimited string
	 */
	public static String getSupertypesAsString(IModelElement e) {
		String r = "";
		Iterator i = e.getSupertypes().iterator();
		while (i.hasNext()) {
			r += ((IModelElement) i.next()).getFullyQualifiedName();
			if (i.hasNext())
				r += "; ";
		}
		return r;
	}

	/**
	 * Returns a modelelement's types as a ; delimited string.
	 * 
	 * @param e
	 *            the modelelement whose types we want
	 * @return the types as a ; delimited string
	 */
	public static String getTypesAsString(IModelElement e) {
		String r = "";
		Iterator i = e.getTypes().iterator();
		while (i.hasNext()) {
			r += ((IModelElement) i.next()).getFullyQualifiedName();
			if (i.hasNext())
				r += "; ";
		}
		return r;
	}
	
	/**
	 * Convert a String array containing fully qualified names of modelelements
	 * to a HashSet of corresponding IModelElements.
	 * 
	 * @param elements
	 *            the string array containing fq names of modelelements
	 * @param allowEmptyStringMatchOnRoot
	 *            if true, parser will match the root entity on an empty string
	 * @return the HashSet of ImplVMModelElements
	 */
	@SuppressWarnings("unchecked")
	public static HashSet<IModelElement> convertStringArrayToSetOfElements(String[] elements,
			boolean allowEmptyStringMatchOnRoot, IModelManager iManager) {
		HashSet resultset = new HashSet<IModelElement>();
		int matched = 0; // non-empty string (\"") counter
		for (int i = 0; i < elements.length; i++) {
			if (allowEmptyStringMatchOnRoot) {
				matched++;
				// System.out.println("[ViatraEditor]\t"+getName()+"::getElementFromStringArray:
				// parsing "+elements[i]);
				IModelElement e = iManager.getElementByName(elements[i]);
				if (e != null)
					resultset.add(e);
			} else {
				if (elements[i].length() > 0) {
					matched++;
					// System.out.println("[ViatraEditor]\t"+getName()+"::getElementFromStringArray:
					// parsing "+elements[i]);
					IModelElement e = iManager.getElementByName(elements[i]);
					if (e != null)
						resultset.add(e);
				}
			}
		}
		if (matched > 0 && resultset.isEmpty())
			return null; // if there was something in the array, but no match
							// was found, signal an arror by returning null
		return resultset;
	}
	
}