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/**
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* Copyright (C) 2007 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.bulkeditor.e4.command;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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import javax.inject.Named;
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import org.eclipse.e4.ui.di.AboutToShow;
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import org.eclipse.e4.ui.model.application.commands.MCommand;
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import org.eclipse.e4.ui.model.application.commands.MCommandsFactory;
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import org.eclipse.e4.ui.model.application.ui.basic.MPart;
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import org.eclipse.e4.ui.model.application.ui.menu.MHandledMenuItem;
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import org.eclipse.e4.ui.model.application.ui.menu.MMenu;
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import org.eclipse.e4.ui.model.application.ui.menu.MMenuElement;
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import org.eclipse.e4.ui.model.application.ui.menu.MMenuFactory;
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import org.eclipse.e4.ui.services.IServiceConstants;
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import eu.etaxonomy.taxeditor.annotatedlineeditor.IEntityCreator;
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import eu.etaxonomy.taxeditor.bulkeditor.IBulkEditorConstants;
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import eu.etaxonomy.taxeditor.bulkeditor.e4.BulkEditorE4;
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import eu.etaxonomy.taxeditor.bulkeditor.input.AbstractBulkEditorInput;
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import eu.etaxonomy.taxeditor.l10n.Messages;
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/**
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 *
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 * @author pplitzner
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 * @date 12.09.2017
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 *
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 */
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public class DynamicNewObjectMenuE4 {
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	private Map<? extends Object, String> classLabelPairs;
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    private BulkEditorE4 editor;
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	  /** {@inheritDoc} */
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    @AboutToShow
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    public void aboutToShow(@Named(IServiceConstants.ACTIVE_PART)MPart activePart,
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            List<MMenuElement> items) {
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        editor = (BulkEditorE4) activePart.getObject();
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		classLabelPairs = getClassLabelPairs();
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		MMenu menu = MMenuFactory.INSTANCE.createMenu();
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        menu.setLabel(Messages.DynamicNewObjectMenuE4_NEW);
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        items.add(menu);
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        for(final Object key : classLabelPairs.keySet()){
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            createMenuItem(menu, key);
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        }
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	}
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	private void createMenuItem(MMenu menu, final Object key){
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	    MHandledMenuItem menuItem = MMenuFactory.INSTANCE.createHandledMenuItem();
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        menuItem.setLabel(classLabelPairs.get(key));
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        MCommand mCommand = MCommandsFactory.INSTANCE.createCommand();
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        mCommand.setElementId(IBulkEditorConstants.DYNAMIC_OPEN_OBJECT_ID);
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        mCommand.setCommandName(classLabelPairs.get(key));
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        //set params
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        menuItem.getTransientData().put(IBulkEditorConstants.DYNAMIC_OPEN_OBJECT_ID+".key", key); //$NON-NLS-1$
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        menuItem.setCommand(mCommand);
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        menu.getChildren().add(menuItem);
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	}
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	/**
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	 * Get class label pairs from Annotated Line Editor's entity creator.
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	 * @return
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	 */
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	private Map<? extends Object, String> getClassLabelPairs() {
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		if (editor != null){
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		    AbstractBulkEditorInput input = editor.getEditorInput();
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		    IEntityCreator<?> entityCreator = input.getEntityCreator();
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		    if(entityCreator!=null){
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		        return entityCreator.getKeyLabelPairs();
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		    }
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		}
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		return Collections.EMPTY_MAP;
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	}
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}
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