org.fusesource.ide.foundation.ui.label.FormatLabelProvider.java Source code

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Here is the source code for org.fusesource.ide.foundation.ui.label.FormatLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2013 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/

package org.fusesource.ide.foundation.ui.label;

import java.text.DateFormat;

import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.fusesource.ide.foundation.ui.internal.FoundationUIActivator;

public class FormatLabelProvider extends StyledCellLabelProvider {
    private DateFormat format;

    @Override
    public void update(ViewerCell cell) {
        Object element = cell.getElement();
        if (element != null) {
            try {
                DateFormat f = getFormat();
                if (f != null) {
                    String text = "";
                    Object convertValue = convertValue(cell);
                    if (convertValue != null) {
                        text = f.format(convertValue);
                    }
                    cell.setText(text);
                }
            } catch (Exception e) {
                FoundationUIActivator.pluginLog().logWarning("Failed to format " + element + " of type "
                        + element.getClass().getName() + " using formatter: " + format + ". " + e, e);
            }
        }
        super.update(cell);
    }

    public DateFormat getFormat() {
        if (format == null) {
            format = createFormat();
        }
        return format;
    }

    public void setFormat(DateFormat format) {
        this.format = format;
    }

    protected DateFormat createFormat() {
        return null;
    }

    /**
     * Strategy method to allow derived classes to convert the value
     */
    protected Object convertValue(ViewerCell cell) {
        return cell.getText();
    }
}