001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.messaging.amf.io.util.instantiator;
023
024import java.math.BigInteger;
025import java.util.ArrayList;
026import java.util.Collections;
027import java.util.List;
028
029import org.granite.messaging.amf.io.util.externalizer.BigIntegerExternalizer;
030import org.granite.messaging.service.ServiceException;
031
032/**
033 * @author Franck WOLFF
034 */
035public class BigIntegerInstantiator extends AbstractInstantiator<BigInteger> {
036
037        private static final long serialVersionUID = 1L;
038
039        private static final String VALUE = "value";
040        
041        private static final List<String> orderedFields;
042    static {
043        List<String> of = new ArrayList<String>(1);
044        of.add(VALUE);
045        orderedFields = Collections.unmodifiableList(of);
046    }
047
048    public BigIntegerInstantiator() {
049    }
050
051    @Override
052    public List<String> getOrderedFieldNames() {
053        return orderedFields;
054    }
055
056    @Override
057    public BigInteger newInstance() {
058        BigInteger bigInteger = null;
059
060        String value = (String)get(VALUE);
061        
062        if (value != null && value.length() == 1) {
063                switch (Character.toLowerCase(value.charAt(0))) {
064                        case '0':
065                                bigInteger = BigInteger.ZERO;
066                                break;
067                        case '1':
068                                bigInteger = BigInteger.ONE;
069                                break;
070                        case 'a':
071                                bigInteger = BigInteger.TEN;
072                                break;
073                }
074        }
075
076        if (bigInteger == null) try {
077            bigInteger = new BigInteger(value, BigIntegerExternalizer.RADIX);
078        }
079        catch (NumberFormatException e) {
080            throw new ServiceException("Illegal BigInteger value (base " + BigIntegerExternalizer.RADIX + "): " + value, e);
081        }
082
083        return bigInteger;
084    }
085}