com.mysql.cj.protocol.x.XProtocolRowInputStream Maven / Gradle / Ivy
/*
* Copyright (c) 2015, 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.x;
import java.util.NoSuchElementException;
import java.util.function.Consumer;
import com.mysql.cj.protocol.ColumnDefinition;
import com.mysql.cj.result.Row;
import com.mysql.cj.result.RowList;
public class XProtocolRowInputStream implements RowList {
private ColumnDefinition metadata;
private XProtocol protocol;
private boolean isDone = false;
private int position = -1;
/** XProtocolRow */
private Row next; // TODO document
private Consumer noticeConsumer;
public XProtocolRowInputStream(ColumnDefinition metadata, XProtocol protocol, Consumer noticeConsumer) {
this.metadata = metadata;
this.protocol = protocol;
this.noticeConsumer = noticeConsumer;
}
public XProtocolRowInputStream(ColumnDefinition metadata, Row row, XProtocol protocol, Consumer noticeConsumer) {
this.metadata = metadata;
this.protocol = protocol;
this.next = row;
this.next.setMetadata(metadata);
this.noticeConsumer = noticeConsumer;
}
public Row readRow() {
if (!hasNext()) {
this.isDone = true;
return null;
}
this.position++;
Row r = this.next;
this.next = null;
return r;
}
public Row next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
return readRow();
}
public boolean hasNext() {
if (this.isDone) {
return false;
} else if (this.next == null) {
this.next = this.protocol.readRowOrNull(this.metadata, this.noticeConsumer);
}
return this.next != null;
}
public int getPosition() {
return this.position;
}
}