001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.messaging.amf.io.util.instantiator;
022    
023    import java.math.BigInteger;
024    import java.util.ArrayList;
025    import java.util.Collections;
026    import java.util.List;
027    
028    import org.granite.messaging.amf.io.util.externalizer.BigIntegerExternalizer;
029    import org.granite.messaging.service.ServiceException;
030    
031    /**
032     * @author Franck WOLFF
033     */
034    public class BigIntegerInstantiator extends AbstractInstantiator<BigInteger> {
035    
036            private static final long serialVersionUID = 1L;
037    
038            private static final String VALUE = "value";
039            
040            private static final List<String> orderedFields;
041        static {
042            List<String> of = new ArrayList<String>(1);
043            of.add(VALUE);
044            orderedFields = Collections.unmodifiableList(of);
045        }
046    
047        public BigIntegerInstantiator() {
048        }
049    
050        @Override
051        public List<String> getOrderedFieldNames() {
052            return orderedFields;
053        }
054    
055        @Override
056        public BigInteger newInstance() {
057            BigInteger bigInteger = null;
058    
059            String value = (String)get(VALUE);
060            
061            if (value != null && value.length() == 1) {
062                    switch (Character.toLowerCase(value.charAt(0))) {
063                            case '0':
064                                    bigInteger = BigInteger.ZERO;
065                                    break;
066                            case '1':
067                                    bigInteger = BigInteger.ONE;
068                                    break;
069                            case 'a':
070                                    bigInteger = BigInteger.TEN;
071                                    break;
072                    }
073            }
074    
075            if (bigInteger == null) try {
076                bigInteger = new BigInteger(value, BigIntegerExternalizer.RADIX);
077            }
078            catch (NumberFormatException e) {
079                throw new ServiceException("Illegal BigInteger value (base " + BigIntegerExternalizer.RADIX + "): " + value, e);
080            }
081    
082            return bigInteger;
083        }
084    }