org.eclipse.scada.ae.ui.testing.views.MonitorsLabelProvider.java Source code

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Here is the source code for org.eclipse.scada.ae.ui.testing.views.MonitorsLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2009, 2013 TH4 SYSTEMS GmbH and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     TH4 SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.scada.ae.ui.testing.views;

import java.text.DateFormat;
import java.util.Date;
import java.util.Map;
import java.util.Set;

import org.eclipse.core.databinding.observable.map.IMapChangeListener;
import org.eclipse.core.databinding.observable.map.IObservableMap;
import org.eclipse.core.databinding.observable.map.MapChangeEvent;
import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.scada.ae.ui.connection.data.MonitorStatusBean;
import org.eclipse.scada.core.Variant;

public class MonitorsLabelProvider extends CellLabelProvider {

    private final IMapChangeListener mapChangeListener = new IMapChangeListener() {
        @Override
        public void handleMapChange(final MapChangeEvent event) {
            final Set<?> affectedElements = event.diff.getChangedKeys();
            if (!affectedElements.isEmpty()) {
                final LabelProviderChangedEvent newEvent = new LabelProviderChangedEvent(MonitorsLabelProvider.this,
                        affectedElements.toArray());
                fireLabelProviderChanged(newEvent);
            }
        }
    };

    private final IObservableMap[] attributeMaps;

    private final DateFormat dateFormat;

    public MonitorsLabelProvider(final IObservableMap... attributeMaps) {
        super();

        for (int i = 0; i < attributeMaps.length; i++) {
            attributeMaps[i].addMapChangeListener(this.mapChangeListener);
        }
        this.attributeMaps = attributeMaps;

        this.dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG);
    }

    @Override
    public void dispose() {
        for (int i = 0; i < this.attributeMaps.length; i++) {
            this.attributeMaps[i].removeMapChangeListener(this.mapChangeListener);
        }
        super.dispose();
    }

    @Override
    public void update(final ViewerCell cell) {
        final Object o = cell.getElement();
        if (o instanceof MonitorStatusBean) {
            final MonitorStatusBean info = (MonitorStatusBean) o;
            switch (cell.getColumnIndex()) {
            case 0: // id
                cell.setText(info.getId());
                break;
            case 1: // state
                cell.setText(info.getStatus().toString());
                break;
            case 2: // timestamp
                cell.setText(getTimestamp(info.getStatusTimestamp()));
                break;
            case 3: // priority
                cell.setText(getAttribute(info.getAttributes(), "priority", "<none>"));
                break;
            case 4: // value
                cell.setText(getValue(info.getValue(), "<none>"));
                break;
            case 5: // ack user
                cell.setText(info.getLastAknUser() != null ? info.getLastAknUser() : "<unknown>");
                break;
            case 6: // ack timestamp
                cell.setText(getTimestamp(info.getLastAknTimestamp()));
                break;
            case 7: // fail timestamp
                cell.setText(getTimestamp(info.getLastFailTimestamp()));
                break;
            }
        }
    }

    private String getTimestamp(final Date timestamp) {
        if (timestamp != null) {
            return this.dateFormat.format(timestamp);
        } else {
            return "<none>";
        }

    }

    private String getAttribute(final Map<String, Variant> attributes, final String key,
            final String defaultString) {
        if (attributes == null) {
            return null;
        }

        return getValue(attributes.get(key), defaultString);
    }

    private String getValue(final Variant value, final String defaultString) {
        if (value == null) {
            return defaultString;
        }

        return value.asString(defaultString);

    }
}