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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.descriptiveDataSet.character;
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import org.eclipse.e4.ui.di.UISynchronize;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.swt.dnd.DropTargetEvent;
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import org.eclipse.swt.dnd.TransferData;
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import eu.etaxonomy.cdm.api.service.ITermNodeService;
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import eu.etaxonomy.cdm.model.description.Character;
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import eu.etaxonomy.cdm.model.term.TermTree;
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import eu.etaxonomy.cdm.persistence.dto.TermNodeDto;
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import eu.etaxonomy.cdm.persistence.dto.TermTreeDto;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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import eu.etaxonomy.taxeditor.store.StoreUtil;
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import eu.etaxonomy.taxeditor.termtree.CharacterTransfer;
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import eu.etaxonomy.taxeditor.termtree.e4.TermTreeDtoDropAdapter;
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/**
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 *
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 * @author pplitzner
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 * @date Jun 1, 2017
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 *
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 */
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public class CharacterDropAdapter extends TermTreeDtoDropAdapter {
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	private CharacterEditor characterEditor;
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    protected CharacterDropAdapter(CharacterEditor characterEditor, Viewer viewer, UISynchronize sync) {
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	    super(characterEditor, viewer, sync);
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	    this.characterEditor = characterEditor;
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	}
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	@Override
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	protected Object determineTarget(DropTargetEvent event) {
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        return event.item == null ? ((TermTree)getViewer().getInput()).getRoot() : event.item.getData();
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	}
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	@Override
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	public boolean performDrop(Object data) {
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	    if(!CharacterTransfer.getInstance().isSupportedType(getCurrentEvent().currentDataType)){
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	        return super.performDrop(data);
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	    }
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	    if(StoreUtil.promptCheckIsDirty(editor)){
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	        return false;
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	    }
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	    if(!characterEditor.isVocabularySet()){
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	        return false;
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	    }
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	    TermNodeDto target = (TermNodeDto) getCurrentTarget();
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	    if(data instanceof Object[]){
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	        Object[] transferObjects = (Object[])data;
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	        for(int i=0;i<transferObjects.length;i++){
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	            Object object = transferObjects[i];
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	            if(object instanceof Character){
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	                Character character = (Character)object;
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	                if(target==null){
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                        //drop on feature tree
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                        target = ((TermTreeDto)getViewer().getInput()).getRoot();
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                    }
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                    CdmStore.getService(ITermNodeService.class).createChildNode(target.getUuid(), character, characterEditor.getVocabulary().getUuid());
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	            }
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	        }
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	        getViewer().refresh();
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	        return true;
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	    }
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	    return false;
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	}
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	@Override
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	public boolean validateDrop(Object target, int operation,
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			TransferData transferData) {
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		if(CharacterTransfer.getInstance().isSupportedType(transferData)){
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		    return true;
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		}
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		return super.validateDrop(target, operation, transferData);
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	}
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}
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