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JDBC Type 4 driver for MySQL
/*
* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
*
* 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 java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import com.mysql.cj.util.StringUtils;
/**
* A {@link com.mysql.cj.result.ValueFactory} implementation to create strings.
*/
public class StringValueFactory implements ValueFactory {
private String encoding;
public StringValueFactory() {
}
public StringValueFactory(String encoding) {
this.encoding = encoding;
}
/**
* Create a string from date fields. The fields are formatted in a YYYY-mm-dd format. A point-in-time is not calculated.
*
* @param year
* year
* @param month
* month
* @param day
* day
* @return string
*/
public String createFromDate(int year, int month, int day) {
// essentially the same string we received from the server, no TZ interpretation
return String.format("%04d-%02d-%02d", year, month, day);
}
/**
* Create a string from time fields. The fields are formatted in a HH:MM:SS[.nnnnnnnnn] format. A point-in-time is not calculated.
*
* @param hours
* hours
* @param minutes
* minutes
* @param seconds
* seconds
* @param nanos
* nanoseconds
* @return string
*/
public String createFromTime(int hours, int minutes, int seconds, int nanos) {
if (nanos > 0) {
return String.format("%02d:%02d:%02d.%09d", hours, minutes, seconds, nanos);
}
return String.format("%02d:%02d:%02d", hours, minutes, seconds);
}
/**
* Create a string from time fields. The fields are formatted by concatening the result of {@link #createFromDate(int,int,int)} and {@link
* #createFromTime(int,int,int,int)}. A point-in-time is not calculated.
*
* @param year
* year
* @param month
* month
* @param day
* day
* @param hours
* hours
* @param minutes
* minutes
* @param seconds
* seconds
* @param nanos
* nanoseconds
* @return string
*/
public String createFromTimestamp(int year, int month, int day, int hours, int minutes, int seconds, int nanos) {
return String.format("%s %s", createFromDate(year, month, day), createFromTime(hours, minutes, seconds, nanos));
}
public String createFromLong(long l) {
return String.valueOf(l);
}
public String createFromBigInteger(BigInteger i) {
return i.toString();
}
public String createFromDouble(double d) {
return String.valueOf(d);
}
public String createFromBigDecimal(BigDecimal d) {
return d.toString();
}
/**
* Interpret the given byte array as a string. This value factory needs to know the encoding to interpret the string. The default (null) will interpet the
* byte array using the platform encoding.
*
* @param bytes
* byte array
* @param offset
* offset
* @param length
* data length in bytes
* @return string
*/
public String createFromBytes(byte[] bytes, int offset, int length) {
return StringUtils.toString(bytes, offset, length, this.encoding);
}
@Override
public String createFromBit(byte[] bytes, int offset, int length) {
// BIT values are interpreted as numbers, not as character codes
return new BigInteger(ByteBuffer.allocate(length + 1).put((byte) 0).put(bytes, offset, length).array()).toString();
}
public String createFromNull() {
return null;
}
public String getTargetTypeName() {
return String.class.getName();
}
}