EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.bulkeditor.handler;

import java.util.Set;

import org.apache.log4j.Logger;

import org.eclipse.core.commands.AbstractHandler;

import org.eclipse.core.commands.ExecutionEvent;

import org.eclipse.core.commands.ExecutionException;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.text.source.Annotation;

import org.eclipse.ui.IEditorInput;

import org.eclipse.ui.IEditorPart;

import org.eclipse.ui.handlers.HandlerUtil;

import org.eclipse.ui.texteditor.IDocumentProvider;

import eu.etaxonomy.taxeditor.annotatedlineeditor.IEntityContainer;

import eu.etaxonomy.taxeditor.annotatedlineeditor.LineAnnotation;

import eu.etaxonomy.taxeditor.annotatedlineeditor.LineAnnotationModel;

import eu.etaxonomy.taxeditor.bulkeditor.BulkEditor;

import eu.etaxonomy.taxeditor.bulkeditor.IBulkEditorConstants;

import eu.etaxonomy.taxeditor.bulkeditor.input.AbstractBulkEditorInput;

/**

 * <p>MergeGroupHandler class.</p>

 *

 * @author p.ciardelli

 * @created 25.06.2009

 * @version 1.0

 */

public class MergeGroupHandler extends AbstractHandler {

	private static final Logger logger = Logger

			.getLogger(MergeGroupHandler.class);

	/* (non-Javadoc)

	 * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)

	 */

	/** {@inheritDoc} */

	public Object execute(ExecutionEvent event) throws ExecutionException {

		IEditorPart editor = HandlerUtil.getActiveEditor(event);

		IEditorInput input = editor.getEditorInput();

		if (editor instanceof BulkEditor && input instanceof AbstractBulkEditorInput) {

			IDocumentProvider provider = ((BulkEditor) editor).getDocumentProvider();

			LineAnnotationModel model = 

					(LineAnnotationModel) provider.getAnnotationModel(input);

			// Check whether there are any group annotations

			Set<LineAnnotation> candidateAnnotations = model.getAllAnnotationsOfType(IBulkEditorConstants.TYPE_MERGE_CANDIDATE);

			if (candidateAnnotations.size() == 0) {

				MessageDialog.openWarning(HandlerUtil.getActiveShell(event), 

						"No merge candidates", "No objects have been chosen for merging.");

				return null;				

			}

			// Check whether group merge target has been set

			Annotation targetAnnotation = model.getFirstAnnotationOfType(IBulkEditorConstants.TYPE_MERGE_TARGET);

			if (targetAnnotation == null) {

				MessageDialog.openWarning(HandlerUtil.getActiveShell(event), 

						"No group merge target set", "No group merge target has been set.");

				return null;

			}			

			Object targetEntity = ((IEntityContainer<?>) targetAnnotation).getEntity();

			logger.info("Merging group");

//			model.printAnnotations();

			for (LineAnnotation annotation : candidateAnnotations) {

				((BulkEditor) editor).removeAnnotatedLine(annotation);

				// Mark entity container for merging with target entity

				((IEntityContainer) annotation).markAsMerged(targetEntity);

				logger.info("Merging " + annotation + " with " + targetAnnotation);

				// Remove annotation from model

				model.removeAnnotation(annotation);

			}

//			model.printAnnotations();	

			model.removeTypeFromAllAnnotations(IBulkEditorConstants.TYPE_MERGE_CANDIDATE);

			model.removeTypeFromAllAnnotations(IBulkEditorConstants.TYPE_MERGE_TARGET);

		}

		return null;

	}

}