org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/data/convert/PercentageDisplayConverter.java

/*******************************************************************************
 * Copyright (c) 2012, 2020 Original authors and others.
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.data.convert;

public class PercentageDisplayConverter extends DisplayConverter {

    @Override
    public Object canonicalToDisplayValue(Object canonicalValue) {
        if (canonicalValue instanceof Number) {
            double percentageValue = ((Number) canonicalValue).doubleValue();
            int displayInt = (int) (percentageValue * 100);
            return String.valueOf(displayInt) + "%"; //$NON-NLS-1$
        }
        return ""; //$NON-NLS-1$
    }

    @Override
    public Object displayToCanonicalValue(Object displayValue) {
        String displayString = (String) displayValue;
        displayString = displayString.trim();
        if (displayString.endsWith("%")) { //$NON-NLS-1$
            displayString = displayString.substring(0,
                    displayString.length() - 1);
        }
        displayString = displayString.trim();
        int displayInt = Integer.valueOf(displayString).intValue();
        double percentageValue = (double) displayInt / 100;
        return Double.valueOf(percentageValue);
    }

}