1 // ****************************************************************************** 2 // 3 // Title: Force Field X. 4 // Description: Force Field X - Software for Molecular Biophysics. 5 // Copyright: Copyright (c) Michael J. Schnieders 2001-2024. 6 // 7 // This file is part of Force Field X. 8 // 9 // Force Field X is free software; you can redistribute it and/or modify it 10 // under the terms of the GNU General Public License version 3 as published by 11 // the Free Software Foundation. 12 // 13 // Force Field X is distributed in the hope that it will be useful, but WITHOUT 14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 // FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 // details. 17 // 18 // You should have received a copy of the GNU General Public License along with 19 // Force Field X; if not, write to the Free Software Foundation, Inc., 59 Temple 20 // Place, Suite 330, Boston, MA 02111-1307 USA 21 // 22 // Linking this library statically or dynamically with other modules is making a 23 // combined work based on this library. Thus, the terms and conditions of the 24 // GNU General Public License cover the whole combination. 25 // 26 // As a special exception, the copyright holders of this library give you 27 // permission to link this library with independent modules to produce an 28 // executable, regardless of the license terms of these independent modules, and 29 // to copy and distribute the resulting executable under terms of your choice, 30 // provided that you also meet, for each linked independent module, the terms 31 // and conditions of the license of that module. An independent module is a 32 // module which is not derived from or based on this library. If you modify this 33 // library, you may extend this exception to your version of the library, but 34 // you are not obligated to do so. If you do not wish to do so, delete this 35 // exception statement from your version. 36 // 37 // ****************************************************************************** 38 package ffx.utilities; 39 40 import jakarta.xml.bind.annotation.adapters.XmlAdapter; 41 42 import javax.annotation.Nullable; 43 44 import static java.lang.Double.parseDouble; 45 import static java.lang.String.format; 46 47 /** 48 * Convert a Double to a String and vice versa for use with JAXB. 49 * 50 * @author Michael J. Schnieders 51 * @see jakarta.xml.bind.annotation.adapters.XmlAdapter 52 * @since 1.0 53 */ 54 public class DoubleXMLAdapter extends XmlAdapter<String, Double> { 55 56 @Override 57 public Double unmarshal(@Nullable String v) { 58 if (v == null || v.isEmpty() || v.equalsIgnoreCase("null")) { 59 return null; 60 } 61 return parseDouble(v); 62 } 63 64 @Override 65 public String marshal(@Nullable Double v) { 66 if (v == null) { 67 return null; 68 } 69 return format("%.16e", v); 70 } 71 } 72