001/*
002 *                    BioJava development code
003 *
004 * This code may be freely distributed and modified under the
005 * terms of the GNU Lesser General Public Licence.  This should
006 * be distributed with the code.  If you do not have a copy,
007 * see:
008 *
009 *      http://www.gnu.org/copyleft/lesser.html
010 *
011 * Copyright for this code is held jointly by the individual
012 * authors.  These should be listed in @author doc comments.
013 *
014 * For more information on the BioJava project and its aims,
015 * or to join the biojava-l mailing list, visit the home page
016 * at:
017 *
018 *      http://www.biojava.org/
019 *
020 */
021package org.biojava.nbio.ontology.utils;
022
023import java.io.InvalidObjectException;
024import java.io.ObjectStreamException;
025import java.io.Serializable;
026import java.lang.reflect.Field;
027
028/**
029 * @author Matthew Pocock
030 */
031public class StaticMemberPlaceHolder implements Serializable {
032        private String className;
033        private String fieldName;
034
035        public StaticMemberPlaceHolder(Field field) {
036                this.className = field.getDeclaringClass().getName();
037                this.fieldName = field.getName();
038        }
039
040        protected StaticMemberPlaceHolder() {}
041
042        public Object readResolve() throws ObjectStreamException {
043                try {
044                        Class c = Class.forName(className);
045                        Field f = c.getDeclaredField(fieldName);
046                        return f.get(null);
047                } catch (Exception e) {
048                        throw new InvalidObjectException(
049                                "Unable to retrieve static field " + fieldName +
050                                "for class " + className + " because:\n" +
051                                e.getMessage()
052                        );
053                }
054        }
055}