org.netxms.ui.eclipse.datacollection.widgets.internal.LastValuesComparator.java Source code

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Here is the source code for org.netxms.ui.eclipse.datacollection.widgets.internal.LastValuesComparator.java

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/**
 * NetXMS - open source network management system
 * Copyright (C) 2003-2010 Victor Kirhenshtein
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package org.netxms.ui.eclipse.datacollection.widgets.internal;

import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.swt.SWT;
import org.netxms.client.datacollection.DataCollectionObject;
import org.netxms.client.datacollection.DciValue;
import org.netxms.ui.eclipse.datacollection.Messages;
import org.netxms.ui.eclipse.datacollection.widgets.LastValuesWidget;
import org.netxms.ui.eclipse.widgets.SortableTableViewer;

/**
 * Comparator for "Last Values" widget
 */
public class LastValuesComparator extends ViewerComparator {
    private boolean showErrors = true;

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
     */
    @Override
    public int compare(Viewer viewer, Object e1, Object e2) {
        int result;

        DciValue v1 = (DciValue) e1;
        DciValue v2 = (DciValue) e2;

        switch ((Integer) ((SortableTableViewer) viewer).getTable().getSortColumn().getData("ID")) //$NON-NLS-1$
        {
        case LastValuesWidget.COLUMN_ID:
            result = (int) (v1.getId() - v2.getId());
            break;
        case LastValuesWidget.COLUMN_DESCRIPTION:
            result = v1.getDescription().compareToIgnoreCase(v2.getDescription());
            break;
        case LastValuesWidget.COLUMN_VALUE:
            result = compareValue(v1, v2);
            break;
        case LastValuesWidget.COLUMN_TIMESTAMP:
            result = v1.getTimestamp().compareTo(v2.getTimestamp());
            break;
        default:
            result = 0;
            break;
        }
        return (((SortableTableViewer) viewer).getTable().getSortDirection() == SWT.UP) ? result : -result;
    }

    /**
     * Compare DCI values taking data type into consideration
     * 
     * @param v1
     * @param v2
     * @return
     */
    private int compareValue(DciValue dci1, DciValue dci2) {
        int dt1, dt2;
        String v1, v2;

        if (showErrors && (dci1.getErrorCount() > 0)) {
            dt1 = DataCollectionObject.DT_STRING;
            v1 = Messages.get().LastValuesLabelProvider_Error;
        } else if (dci1.getDcObjectType() == DataCollectionObject.DCO_TYPE_TABLE) {
            dt1 = DataCollectionObject.DT_STRING;
            v1 = Messages.get().LastValuesLabelProvider_Table;
        } else {
            dt1 = dci1.getDataType();
            v1 = dci1.getValue();
        }

        if (showErrors && (dci2.getErrorCount() > 0)) {
            dt2 = DataCollectionObject.DT_STRING;
            v2 = Messages.get().LastValuesLabelProvider_Error;
        } else if (dci2.getDcObjectType() == DataCollectionObject.DCO_TYPE_TABLE) {
            dt2 = DataCollectionObject.DT_STRING;
            v2 = Messages.get().LastValuesLabelProvider_Table;
        } else {
            dt2 = dci2.getDataType();
            v2 = dci2.getValue();
        }

        int dataType = Math.max(dt1, dt2);
        try {
            switch (dataType) {
            case DataCollectionObject.DT_INT:
                return Integer.signum(Integer.parseInt(v1) - Integer.parseInt(v2));
            case DataCollectionObject.DT_UINT:
            case DataCollectionObject.DT_INT64:
            case DataCollectionObject.DT_UINT64:
                return Long.signum(Long.parseLong(v1) - Long.parseLong(v2));
            case DataCollectionObject.DT_FLOAT:
                // Maybe combination of String/Float because DT_FLOAT > DT_STRING
                if ((dt1 == DataCollectionObject.DT_STRING) || (dt2 == DataCollectionObject.DT_STRING))
                    return v1.compareToIgnoreCase(v2);
                return (int) Math.signum(Double.parseDouble(v1) - Double.parseDouble(v2));
            default:
                return v1.compareToIgnoreCase(v2);
            }
        } catch (NumberFormatException e) {
            return v1.compareToIgnoreCase(v2);
        }
    }

    /**
     * @return the showErrors
     */
    public boolean isShowErrors() {
        return showErrors;
    }

    /**
     * @param showErrors the showErrors to set
     */
    public void setShowErrors(boolean showErrors) {
        this.showErrors = showErrors;
    }
}