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
021package org.granite.messaging.amf.io.util.instantiator;
022
023import java.math.BigInteger;
024import java.util.ArrayList;
025import java.util.Collections;
026import java.util.List;
027
028import org.granite.messaging.amf.io.util.externalizer.BigIntegerExternalizer;
029import org.granite.messaging.service.ServiceException;
030
031/**
032 * @author Franck WOLFF
033 */
034public 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}