EDIT

/**

 *

 */

package eu.etaxonomy.taxeditor.editor.view.descriptive.handler;

import java.util.ArrayList;

import java.util.List;

import java.util.UUID;

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.core.commands.common.NotDefinedException;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.swt.widgets.Display;

import org.eclipse.ui.PartInitException;

import org.eclipse.ui.handlers.HandlerUtil;

import eu.etaxonomy.cdm.api.service.IDescriptionService;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.description.DescriptionBase;

import eu.etaxonomy.cdm.model.description.TaxonDescription;

import eu.etaxonomy.cdm.model.taxon.Classification;

import eu.etaxonomy.cdm.model.taxon.TaxonNode;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;

import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;

import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.MoveDescriptionToOtherTaxonOperation;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;

import eu.etaxonomy.taxeditor.session.ICdmEntitySessionEnabled;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.dialog.selection.TaxonNodeSelectionDialog;

/**

 * <p>ChangeAcceptedTaxonToSynonymHandler class.</p>

 *

 * @author a.kohlbecker

 * @created Okt. 11, 2013

 * @version 1.0

 *

 */

public class MoveDescriptionToOtherTaxonHandler extends AbstractHandler

		implements IPostOperationEnabled {

	private static final Logger logger = Logger

			.getLogger(MoveDescriptionToOtherTaxonHandler.class);

	private MoveDescriptionToOtherTaxonOperation operation;

	private UUID newAcceptedTaxonNodeUuid;

	private MultiPageTaxonEditor editor;

	/* (non-Javadoc)

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

	 */

	/** {@inheritDoc} */

	@Override

    public Object execute(ExecutionEvent event) throws ExecutionException {

		ISelection selection = HandlerUtil.getCurrentSelection(event);

		editor = EditorUtil.getActiveMultiPageTaxonEditor();

		if (this.editor.isDirty()){

		    boolean proceed = MessageDialog.openQuestion(null,

	                   "Save changes", "You have made changes that must be saved before this query can be executed. Would you like to proceed?");

	        if (proceed) {

	            editor.doSave(EditorUtil.getMonitor());

	        } else {

	            return null;

	        }

		}

		if(selection instanceof IStructuredSelection){

			List<TaxonDescription> descriptions = new ArrayList<TaxonDescription>();

			IStructuredSelection structuredSelection = (IStructuredSelection) selection;

			for(Object element : structuredSelection.toArray()){

				UUID uuid = null;

				if (element instanceof FeatureNodeContainer){

					uuid = ((FeatureNodeContainer)element).getDescription().getUuid();

				}	else if (element instanceof DescriptionBase){

					uuid = ((DescriptionBase)element).getUuid();

				}

				if (uuid != null){

					descriptions.add((TaxonDescription) CdmStore.getService(IDescriptionService.class).load(uuid, null));

				}

			}

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

				return null;

			}

			// Choose the target taxon

			List<UUID> excludeTaxa = new ArrayList<UUID>();

			excludeTaxa.add(descriptions.get(0).getTaxon().getUuid());

			//get current taxon node

			TaxonNode node = null;

			Classification classification = null;

			MultiPageTaxonEditor taxonEditor = EditorUtil.getActiveMultiPageTaxonEditor();

            if(taxonEditor!=null){

                node = ((TaxonEditorInput) taxonEditor.getEditorInput()).getTaxonNode();

                classification = node.getClassification();

            }

			TaxonNode newAcceptedTaxonNode = TaxonNodeSelectionDialog.select(HandlerUtil.getActiveShell(event),

					editor.getConversationHolder(),

					"Choose the accepted taxon",

					excludeTaxa,

					node,

					classification);

			if (newAcceptedTaxonNode == null) {

				return null;

			}

			newAcceptedTaxonNodeUuid = newAcceptedTaxonNode.getUuid();

			try {

				for(TaxonDescription description : descriptions){

					operation = new MoveDescriptionToOtherTaxonOperation(event.getCommand().getName(),

											editor.getUndoContext(),

											description,

											newAcceptedTaxonNode,

											this,

											editor,

											(ICdmEntitySessionEnabled)editor.getEditorInput());

					AbstractUtility.executeOperation(operation);

				}

			} catch (NotDefinedException e) {

				logger.warn("Command name not set");

			}

		}

		return null;

	}

	/* (non-Javadoc)

	 * @see eu.etaxonomy.taxeditor.operations.IPostOperationEnabled#postOperation(eu.etaxonomy.cdm.model.common.CdmBase)

	 */

	/** {@inheritDoc} */

	@Override

    public boolean postOperation(CdmBase objectAffectedByOperation) {

		Display.getDefault().asyncExec(new Runnable(){

			@Override

            public void run() {

				AbstractUtility.close(editor);

				try {

					MultiPageTaxonEditor possibleOpenEditor = (MultiPageTaxonEditor) EditorUtil.findEditorByTaxonNodeUuid(newAcceptedTaxonNodeUuid);

					if(possibleOpenEditor != null){

						AbstractUtility.close(possibleOpenEditor);

					}

					EditorUtil.openTaxonNode(newAcceptedTaxonNodeUuid);

				} catch (PartInitException e) {

					MessagingUtils.error(this.getClass(), e);

					throw new RuntimeException(e);

				} catch (Exception e) {

					MessagingUtils.warningDialog("Could not create Taxon", this, e.getMessage());

				}

			}

		});

		return true;

	}

	/**

	 * <p>onComplete</p>

	 *

	 * @return a boolean.

	 */

	@Override

    public boolean onComplete() {

		// TODO Auto-generated method stub

		return false;

	}

}