com.mysql.cj.result.AbstractNumericValueFactory Maven / Gradle / Ivy
/*
* Copyright (c) 2019, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.result;
import com.mysql.cj.Messages;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.conf.PropertySet;
import com.mysql.cj.exceptions.DataConversionException;
import com.mysql.cj.protocol.a.MysqlTextValueDecoder;
import com.mysql.cj.util.StringUtils;
public abstract class AbstractNumericValueFactory extends DefaultValueFactory {
public AbstractNumericValueFactory(PropertySet pset) {
super(pset);
}
@Override
public T createFromBytes(byte[] bytes, int offset, int length, Field f) {
if (length == 0 && this.pset.getBooleanProperty(PropertyKey.emptyStringsConvertToZero).getValue()) {
return createFromLong(0);
}
// TODO: Too expensive to convert from other charset to ASCII here? UTF-8 (e.g.) doesn't need any conversion before being sent to the decoder
String s = StringUtils.toString(bytes, offset, length, f.getEncoding());
byte[] newBytes = s.getBytes();
if (s.contains("e") || s.contains("E") || s.matches("-?\\d*\\.\\d*")) {
// floating point
return createFromDouble(MysqlTextValueDecoder.getDouble(newBytes, 0, newBytes.length));
} else if (s.matches("-?\\d+")) {
// integer
if (s.charAt(0) == '-' // TODO shouldn't we check the length as well?
|| length <= (MysqlTextValueDecoder.MAX_SIGNED_LONG_LEN - 1) && newBytes[0] >= '0' && newBytes[0] <= '8') {
return createFromLong(MysqlTextValueDecoder.getLong(newBytes, 0, newBytes.length));
}
return createFromBigInteger(MysqlTextValueDecoder.getBigInteger(newBytes, 0, newBytes.length));
}
throw new DataConversionException(Messages.getString("ResultSet.UnableToInterpretString", new Object[] { s }));
}
@Override
public T createFromYear(long l) {
return createFromLong(l);
}
}