com.mysql.cj.protocol.a.result.AbstractResultsetRows 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.,
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*/
package com.mysql.cj.protocol.a.result;
import com.mysql.cj.protocol.ColumnDefinition;
import com.mysql.cj.protocol.ProtocolEntityFactory;
import com.mysql.cj.protocol.ResultsetRow;
import com.mysql.cj.protocol.ResultsetRows;
import com.mysql.cj.protocol.ResultsetRowsOwner;
import com.mysql.cj.protocol.a.NativePacketPayload;
public abstract class AbstractResultsetRows implements ResultsetRows {
protected final static int BEFORE_START_OF_ROWS = -1;
/**
* Field-level metadata from the server. We need this, because it is not
* sent for each batch of rows, but we need the metadata to unpack the
* results for each field.
*/
protected ColumnDefinition metadata;
/**
* Position in cache of rows, used to determine if we need to fetch more
* rows from the server to satisfy a request for the next row.
*/
protected int currentPositionInFetchedRows = BEFORE_START_OF_ROWS;
protected boolean wasEmpty = false; // we don't know until we attempt to traverse
/**
* The result set that we 'belong' to.
*/
protected ResultsetRowsOwner owner;
protected ProtocolEntityFactory rowFactory;
@Override
public void setOwner(ResultsetRowsOwner rs) {
this.owner = rs;
}
@Override
public ResultsetRowsOwner getOwner() {
return this.owner;
}
@Override
public void setMetadata(ColumnDefinition columnDefinition) {
this.metadata = columnDefinition;
}
public ColumnDefinition getMetadata() {
return this.metadata;
}
@Override
public boolean wasEmpty() {
return this.wasEmpty;
}
}