org.eclipse.paho.mqtt.ui.support.provider.PropertyCellLabelProvider.java Source code

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Here is the source code for org.eclipse.paho.mqtt.ui.support.provider.PropertyCellLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2013 IBM Corp.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution. 
 *
 * The Eclipse Public License is available at 
 *    http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Bin Zhang - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.paho.mqtt.ui.support.provider;

import java.beans.PropertyDescriptor;

import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.paho.mqtt.ui.util.Beans;
import org.eclipse.paho.mqtt.ui.util.Colors;

/**
 * 
 * @author Bin Zhang
 * 
 */
public final class PropertyCellLabelProvider<T> extends ColumnLabelProvider {
    private final PropertyDescriptor descriptor;
    private final IValueFormatter<T> valueFormatter;

    /**
     * @param descriptor
     * @param valueFormatter
     */
    public PropertyCellLabelProvider(PropertyDescriptor descriptor, IValueFormatter<T> valueFormatter) {
        this.descriptor = descriptor;
        this.valueFormatter = valueFormatter;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void update(ViewerCell cell) {
        super.update(cell);

        Object value = Beans.readProperty(cell.getElement(), descriptor);

        if (value == null) {
            // SWT.COLOR_GRAY
            cell.setBackground(Colors.getColor("BFC1C0")); //$NON-NLS-1$
            cell.setText(null);
            return;
        }

        String text = String.valueOf(value);
        if (valueFormatter != null && value != null) {
            text = valueFormatter.format((T) value);
        }
        cell.setText(text);
    }

}