/*******************************************************************************
 * Copyright (c) 2013, 2018 Willink Transformations and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * Contributors:
 *     E.D.Willink - initial API and implementation
 *******************************************************************************/
package org.eclipse.ocl.examples.build.utilities;

import org.apache.log4j.Logger;
import org.eclipse.emf.common.util.TreeIterator;
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.ResourceSetImpl;
import org.eclipse.emf.mwe.core.WorkflowContext;
import org.eclipse.emf.mwe.core.issues.Issues;
import org.eclipse.emf.mwe.core.lib.WorkflowComponentWithModelSlot;
import org.eclipse.emf.mwe.core.monitor.ProgressMonitor;
import org.eclipse.uml2.uml.Comment;

/**
 * Workaround Bug 424568 by correcting \r\n in Comments.
 */
public class CommentNormalizer extends WorkflowComponentWithModelSlot
{
	private Logger log = Logger.getLogger(getClass());	
	private ResourceSet resourceSet = null;	

	public ResourceSet getResourceSet() {
		if (resourceSet == null) {
			resourceSet = new ResourceSetImpl();
		}
		return resourceSet;
	}

	@Override
	public void invokeInternal(WorkflowContext ctx, ProgressMonitor arg1, Issues arg2) {
		Resource resource = (Resource) ctx.get(getModelSlot());
		log.info("Normalizing comments in '" + resource.getURI() + "'");
    	for (TreeIterator<EObject> tit = resource.getAllContents(); tit.hasNext(); ) {
    		EObject eObject = tit.next();
    		if (eObject instanceof Comment) {
    			Comment comment = (Comment)eObject;
				String string = comment.getBody();
				if (string != null) {
					String normalizedString = string.replaceAll("\\r\\n", "\n");
					if (!string.equals(normalizedString)) {
						comment.setBody(normalizedString);
					}
				}
    		}
    	}
	}
	
	public void setResourceSet(ResourceSet resourceSet) {
		this.resourceSet = resourceSet;
	}
}