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

Introduction

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

Source

/**
 * NetXMS - open source network management system
 * Copyright (C) 2003-2011 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.TableRow;
import org.netxms.client.datacollection.DataCollectionItem;
import org.netxms.ui.eclipse.widgets.SortableTableViewer;

/**
 * Comparator for table items
 */
public class TableItemComparator extends ViewerComparator {
    private int[] formats;

    /**
     * 
     */
    public TableItemComparator(int[] formats) {
        this.formats = formats;
    }

    /* (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) {
        final int column = (Integer) ((SortableTableViewer) viewer).getTable().getSortColumn().getData("ID"); //$NON-NLS-1$
        final int format = (column < formats.length) ? formats[column] : DataCollectionItem.DT_STRING;

        final String value1 = ((TableRow) e1).get(column).getValue();
        final String value2 = ((TableRow) e2).get(column).getValue();

        int result;
        switch (format) {
        case DataCollectionItem.DT_INT:
        case DataCollectionItem.DT_UINT:
            result = safeParseInt(value1) - safeParseInt(value2);
            break;
        case DataCollectionItem.DT_INT64:
        case DataCollectionItem.DT_UINT64:
            result = Long.signum(safeParseLong(value1) - safeParseLong(value2));
            break;
        case DataCollectionItem.DT_FLOAT:
            result = (int) Math.signum(safeParseDouble(value1) - safeParseDouble(value2));
            break;
        default:
            result = value1.compareToIgnoreCase(value2);
            break;
        }

        return (((SortableTableViewer) viewer).getTable().getSortDirection() == SWT.UP) ? result : -result;
    }

    /**
     * @param s
     * @return
     */
    private static int safeParseInt(String s) {
        try {
            return Integer.parseInt(s);
        } catch (NumberFormatException e) {
            return 0;
        }
    }

    /**
     * @param s
     * @return
     */
    private static long safeParseLong(String s) {
        try {
            return Long.parseLong(s);
        } catch (NumberFormatException e) {
            return 0;
        }
    }

    /**
     * @param s
     * @return
     */
    private static double safeParseDouble(String s) {
        try {
            return Double.parseDouble(s);
        } catch (NumberFormatException e) {
            return 0;
        }
    }
}