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// $Id$
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/**
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* Copyright (C) 2009 EDIT
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* European Distributed Institute of Taxonomy 
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* http://www.e-taxonomy.eu
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* 
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.editor.definedterm.handler;
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import java.util.Iterator;
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import org.eclipse.core.commands.AbstractHandler;
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import org.eclipse.core.commands.ExecutionEvent;
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import org.eclipse.core.commands.ExecutionException;
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import org.eclipse.core.commands.common.NotDefinedException;
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import org.eclipse.core.commands.operations.IUndoContext;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.ui.handlers.HandlerUtil;
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import eu.etaxonomy.cdm.model.common.TermBase;
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import eu.etaxonomy.taxeditor.editor.definedterm.DefinedTermEditor;
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import eu.etaxonomy.taxeditor.editor.definedterm.operation.DeleteTermBaseOperation;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
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import eu.etaxonomy.taxeditor.store.StoreUtil;
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/**
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 * @author l.morris
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 * @date 22 Dec 2011
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 *
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 */
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public class DeleteTermBaseHandler extends AbstractHandler {
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	/* (non-Javadoc)
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	 * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
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	 */
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	@Override
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	public Object execute(ExecutionEvent event) throws ExecutionException {
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		DefinedTermEditor editor = (DefinedTermEditor) HandlerUtil
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				.getActiveEditor(event);
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		if (editor instanceof DefinedTermEditor){
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			DefinedTermEditor dfe = (DefinedTermEditor) editor;
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			try {
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				String label = event.getCommand().getName();
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				IUndoContext undoContext = StoreUtil.getUndoContext();
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				IStructuredSelection selection = (IStructuredSelection) HandlerUtil
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						.getCurrentSelection(event);
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				Iterator<TermBase> selectionIterator = selection.iterator();
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				while (selectionIterator.hasNext()){
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					TermBase term = selectionIterator.next();
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					AbstractPostOperation operation = 
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							new DeleteTermBaseOperation(label, 
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									undoContext,
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									term,
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									dfe.getDefinedTermEditorInput(), 
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									editor);
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					StoreUtil.executeOperation(operation);
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				}	
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			} catch (NotDefinedException e) {
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				MessagingUtils.error(getClass(), e);
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			}
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		}
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		return null;
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	}
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}
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