ecommons.waltable/org.eclipse.statet.ecommons.waltable.core/src/org/eclipse/statet/ecommons/waltable/data/convert/PercentageDisplayConverter.java

/*=============================================================================#
 # Copyright (c) 2012, 2021 Original NatTable 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 NatTable authors and others - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.ecommons.waltable.data.convert;


public class PercentageDisplayConverter extends DisplayConverter {

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

	@Override
	public Object displayToCanonicalValue(final 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();
		final int displayInt= Integer.valueOf(displayString).intValue();
		final double percentageValue= (double) displayInt / 100;
		return Double.valueOf(percentageValue);
	}

}