com.mysql.cj.protocol.a.TextRowFactory Maven / Gradle / Ivy
/*
* Copyright (c) 2016, 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.protocol.a;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.protocol.ColumnDefinition;
import com.mysql.cj.protocol.ProtocolEntityFactory;
import com.mysql.cj.protocol.Resultset;
import com.mysql.cj.protocol.Resultset.Concurrency;
import com.mysql.cj.protocol.ResultsetRow;
import com.mysql.cj.protocol.a.NativeConstants.StringSelfDataType;
import com.mysql.cj.protocol.a.result.ByteArrayRow;
import com.mysql.cj.protocol.a.result.TextBufferRow;
public class TextRowFactory extends AbstractRowFactory implements ProtocolEntityFactory {
public TextRowFactory(NativeProtocol protocol, ColumnDefinition colDefinition, Resultset.Concurrency resultSetConcurrency,
boolean canReuseRowPacketForBufferRow) {
this.columnDefinition = colDefinition;
this.resultSetConcurrency = resultSetConcurrency;
this.canReuseRowPacketForBufferRow = canReuseRowPacketForBufferRow;
this.useBufferRowSizeThreshold = protocol.getPropertySet().getMemorySizeProperty(PropertyKey.largeRowSizeThreshold);
this.exceptionInterceptor = protocol.getExceptionInterceptor();
this.valueDecoder = new MysqlTextValueDecoder();
}
@Override
public ResultsetRow createFromMessage(NativePacketPayload rowPacket) {
// use a buffer row for reusable packets (streaming results), blobs and long strings
// or if we're over the threshold
boolean useBufferRow = this.canReuseRowPacketForBufferRow || this.columnDefinition.hasLargeFields()
|| rowPacket.getPayloadLength() >= this.useBufferRowSizeThreshold.getValue();
if (this.resultSetConcurrency == Concurrency.UPDATABLE || !useBufferRow) {
byte[][] rowBytes = new byte[this.columnDefinition.getFields().length][];
for (int i = 0; i < this.columnDefinition.getFields().length; i++) {
rowBytes[i] = rowPacket.readBytes(StringSelfDataType.STRING_LENENC);
}
return new ByteArrayRow(rowBytes, this.exceptionInterceptor);
}
return new TextBufferRow(rowPacket, this.columnDefinition, this.exceptionInterceptor, this.valueDecoder);
}
@Override
public boolean canReuseRowPacketForBufferRow() {
return this.canReuseRowPacketForBufferRow;
}
}