/**
* Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET
* (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
* informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
* COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp.,
* INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM
* ITALIA S.p.a.(TI), TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.societies.api.privacytrust.trust.model.util;
import java.text.NumberFormat;
/**
* This class provides utility methods in order to format trust values as
* user-friendly Strings.
*
* @author <a href="mailto:nicolas.liampotis@cn.ntua.gr">Nicolas Liampotis</a> (ICCS)
* @since 1.2
*/
public class TrustValueFormat {
/**
* Formats the specified trust value as a percentage. With this formatter,
* a decimal fraction such as 0.75 is displayed as <code>"75%"</code>. The
* method returns <code>"-"</code> if the specified trust value is
* <code>null</code>.
*
* @param trustValue
* the trust value to format as a percentage.
* @return a String representing the specified trust value as a percentage.
* @throws IllegalArgumentException if the specified value is an out of
* range Double, i.e. not within [0,1].
*/
public static String formatPercent(Double trustValue) {
if (trustValue == null)
return "-";
if (trustValue < 0d || trustValue > 1d)
throw new IllegalArgumentException("trustValue is out of range [0,1]");
final NumberFormat percentFormatter = NumberFormat.getPercentInstance();
return percentFormatter.format(trustValue);
}
/**
* Formats the specified trust value as a fraction of 100. With this
* formatter, a decimal fraction such as 0.75 is displayed as
* <code>"75/100"</code>. The method returns <code>"-"</code> if the
* specified trust value is <code>null</code>.
*
* @param trustValue
* the trust value to format as a fraction of 100.
* @return a String representing the specified trust value as a fraction of
* 100.
* @throws IllegalArgumentException if the specified value is an out of
* range Double, i.e. not within [0,1].
*/
public static String formatFraction(Double trustValue) {
if (trustValue == null)
return "-";
if (trustValue < 0d || trustValue > 1d)
throw new IllegalArgumentException("trustValue is out of range [0,1]");
return new String(Math.round(100 * trustValue) + "/100");
}
}