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.convert.impl;
022
023import java.lang.reflect.Type;
024
025import org.granite.messaging.amf.io.convert.Converter;
026import org.granite.messaging.amf.io.convert.Converters;
027
028/**
029 * @author Franck WOLFF
030 */
031public class Number2Long extends Converter {
032
033    private static final Long ZERO = Long.valueOf(0L);
034
035    public Number2Long(Converters converters) {
036        super(converters);
037    }
038
039    @Override
040        protected boolean internalCanConvert(Object value, Type targetType) {
041        return
042            (targetType.equals(Long.class) || targetType.equals(Long.TYPE)) &&
043            (value == null || value instanceof Number);
044    }
045
046    @Override
047        protected Object internalConvert(Object value, Type targetType) {
048        if (value == null)
049            return (targetType.equals(Long.TYPE) ? ZERO : null);
050        return Long.valueOf(((Number)value).longValue());
051    }
052}