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// $Id$
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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.view.datasource;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.jface.viewers.ViewerComparator;
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import eu.etaxonomy.cdm.config.ICdmSource;
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import eu.etaxonomy.cdm.database.ICdmDataSource;
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import eu.etaxonomy.cdm.model.metadata.CdmMetaData.MetaDataPropertyName;
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import eu.etaxonomy.cdm.model.name.NomenclaturalCode;
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/**
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 * @author n.hoffmann
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 * @created Dec 8, 2010
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 * @version 1.0
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 */
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public class CdmDataSourceViewerComparator extends ViewerComparator {
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	private int propertyIndex;
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	private static final int DESCENDING = 1;
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	private int direction = DESCENDING;
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	public CdmDataSourceViewerComparator() {
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		this.propertyIndex = 1;
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		direction = DESCENDING;
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	}
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	public void setColumn(int column) {
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		if (column == this.propertyIndex) {
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			// Same column as last sort; toggle the direction
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			direction = 1 - direction;
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		} else {
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			// New column; do an ascending sort
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			this.propertyIndex = column;
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			direction = DESCENDING;
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		}
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	}
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	/* (non-Javadoc)
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	 * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
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	 */
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	@Override
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	public int compare(Viewer viewer, Object e1, Object e2) {
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		CdmMetaDataAwareDataSourceContainer d1 = (CdmMetaDataAwareDataSourceContainer) e1;
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		CdmMetaDataAwareDataSourceContainer d2 = (CdmMetaDataAwareDataSourceContainer) e2;
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		ICdmSource cs1 = d1.getCdmSource();
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		ICdmSource cs2 = d2.getCdmSource();
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		int result = 0;
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		switch (propertyIndex) {
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			case 10:
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				result = d1.getMetaData(MetaDataPropertyName.DB_CREATE_NOTE).compareTo(d2.getMetaData(MetaDataPropertyName.DB_CREATE_NOTE));
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				break;
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			case 9:
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				// is compatible
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				break;	
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			case 8:
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				result = d1.getMetaData(MetaDataPropertyName.DB_SCHEMA_VERSION).compareTo(d2.getMetaData(MetaDataPropertyName.DB_SCHEMA_VERSION));
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				break;
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			case 7:
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				result = d1.getMetaData(MetaDataPropertyName.DB_CREATE_DATE).compareTo(d2.getMetaData(MetaDataPropertyName.DB_CREATE_DATE));
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				break;
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			case 6:
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				// is running
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				break;
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			case 5:
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				NomenclaturalCode code1 = d1.getCdmSource().getNomenclaturalCode();
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				NomenclaturalCode code2 = d2.getCdmSource().getNomenclaturalCode();
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				if (code1 != null && code2 != null) {
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					result = code1.compareTo(code2);
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				}
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				break;
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			case 4:
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				if(cs1 instanceof ICdmDataSource && cs2 instanceof ICdmDataSource) {
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					result = ((ICdmDataSource)cs1).getDatabase().compareTo(((ICdmDataSource)cs2).getDatabase());
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				}
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				break;
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			case 3:
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				if(cs1 instanceof ICdmDataSource && cs2 instanceof ICdmDataSource) {
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					result = ((ICdmDataSource)cs1).getDatabaseType().getName().compareTo(((ICdmDataSource)cs2).getDatabaseType().getName());
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				}
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				break;
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			case 2:
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				String server1 = d1.getCdmSource().getServer();
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				String server2 = d2.getCdmSource().getServer();
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				if(server1 != null && server2 != null){
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					result = server1.compareTo(server2);
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				}
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				// h2 databases do not have server entries
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				break;
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			default:
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				result = d1.getCdmSource().getName().compareTo(d2.getCdmSource().getName());
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		}
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		// If descending order, flip the direction
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		if (direction == DESCENDING) {
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			result = -result;
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		}
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		return result;
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	}
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}
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