com.mysql.cj.xdevapi.SqlResultBuilder 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.xdevapi;
import java.util.ArrayList;
import java.util.List;
import java.util.TimeZone;
import com.mysql.cj.MysqlxSession;
import com.mysql.cj.conf.PropertySet;
import com.mysql.cj.protocol.ColumnDefinition;
import com.mysql.cj.protocol.ProtocolEntity;
import com.mysql.cj.protocol.ResultBuilder;
import com.mysql.cj.protocol.x.FetchDoneEntity;
import com.mysql.cj.protocol.x.FetchDoneMoreResults;
import com.mysql.cj.protocol.x.Notice;
import com.mysql.cj.protocol.x.StatementExecuteOk;
import com.mysql.cj.protocol.x.StatementExecuteOkBuilder;
import com.mysql.cj.result.BufferedRowList;
import com.mysql.cj.result.DefaultColumnDefinition;
import com.mysql.cj.result.Field;
import com.mysql.cj.result.Row;
/**
* Result builder producing a {@link SqlResult} instance.
*/
public class SqlResultBuilder implements ResultBuilder {
private ArrayList fields = new ArrayList<>();
private ColumnDefinition metadata;
private List rows = new ArrayList<>();
TimeZone defaultTimeZone;
PropertySet pset;
boolean isRowResult = false;
List resultSets = new ArrayList<>();
private ProtocolEntity prevEntity = null;
private StatementExecuteOkBuilder statementExecuteOkBuilder = new StatementExecuteOkBuilder();
public SqlResultBuilder(TimeZone defaultTimeZone, PropertySet pset) {
this.defaultTimeZone = defaultTimeZone;
this.pset = pset;
}
public SqlResultBuilder(MysqlxSession sess) {
this.defaultTimeZone = sess.getServerSession().getDefaultTimeZone();
this.pset = sess.getPropertySet();
}
@Override
public boolean addProtocolEntity(ProtocolEntity entity) {
if (entity instanceof Field) {
this.fields.add((Field) entity);
if (!this.isRowResult) {
this.isRowResult = true;
}
this.prevEntity = entity;
return false;
} else if (entity instanceof Notice) {
this.statementExecuteOkBuilder.addProtocolEntity(entity);
return false;
}
if (this.isRowResult && this.metadata == null) {
this.metadata = new DefaultColumnDefinition(this.fields.toArray(new Field[] {}));
}
if (entity instanceof Row) {
this.rows.add(((Row) entity).setMetadata(this.metadata));
} else if (entity instanceof FetchDoneMoreResults) {
this.resultSets.add(new SqlSingleResult(this.metadata, this.defaultTimeZone, new BufferedRowList(this.rows),
() -> this.statementExecuteOkBuilder.build(), this.pset));
// clear variables to accept next result set
this.fields = new ArrayList<>();
this.metadata = null;
this.rows = new ArrayList<>();
this.statementExecuteOkBuilder = new StatementExecuteOkBuilder();
} else if (entity instanceof FetchDoneEntity) {
if (this.prevEntity instanceof FetchDoneMoreResults) {
// no-op, possibly bug in xplugin sending FetchDone immediately following FetchDoneMoreResultsets
} else {
this.resultSets.add(new SqlSingleResult(this.metadata, this.defaultTimeZone, new BufferedRowList(this.rows),
() -> this.statementExecuteOkBuilder.build(), this.pset));
}
} else if (entity instanceof StatementExecuteOk) {
return true;
}
this.prevEntity = entity;
return false;
}
@Override
public SqlResult build() {
return this.isRowResult ? new SqlMultiResult(() -> {
return this.resultSets.size() > 0 ? this.resultSets.remove(0) : null;
}) : new SqlUpdateResult(this.statementExecuteOkBuilder.build());
}
}