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A Paradox Java Driver (using JDBC 4)

There is a newer version: 1.6.3

/*
 * DateField.java 07/06/2016 Copyright (C) 2016 Leonardo Alves da Costa This program is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in
 * the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a
 * copy of the GNU General Public License along with this program. If not, see .
 */
package com.googlecode.paradox.data.field;

import com.googlecode.paradox.data.FieldParser;
import com.googlecode.paradox.data.table.value.FieldValue;
import com.googlecode.paradox.metadata.ParadoxField;
import com.googlecode.paradox.metadata.ParadoxTable;
import com.googlecode.paradox.utils.DateUtils;

import java.nio.ByteBuffer;
import java.sql.Date;
import java.sql.Types;

/**
 * Parses date fields.
 *
 * @author Leonardo Alves da Costa
 * @version 1.0
 * @since 1.3
 */
public final class DateField implements FieldParser {

    /**
     * {@inheritDoc}.
     */
    @Override
    public boolean match(final int type) {
        return type == 2;
    }

    /**
     * {@inheritDoc}.
     */
    @Override
    public FieldValue parse(final ParadoxTable table, final ByteBuffer buffer, final ParadoxField field) {
        final int a1 = buffer.get() & 0xFF;
        final int a2 = buffer.get() & 0xFF;
        final int a3 = buffer.get() & 0xFF;
        final int a4 = buffer.get() & 0xFF;
        final long days = ((a1 << 24) | (a2 << 16) | (a3 << 8) | a4) & 0x0FFF_FFFFL;

        Date date = null;
        if (days != 0) {
            date = DateUtils.sdnToGregorian(days + 1_721_425);
        }

        return new FieldValue(date, Types.DATE);
    }
}