/*
* 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.util.
Iterator;
import java.util.
List;
import java.util.
NoSuchElementException;
import java.util.
Spliterators;
import java.util.stream.
Collectors;
import java.util.stream.
StreamSupport;
public class
BufferedRowList implements
RowList {
private
List<
Row>
rowList;
private int
position = -1;
public
BufferedRowList(
List<
Row>
rowList) {
this.
rowList =
rowList;
}
/**
* Create a new instance by filling the internal buffer by draining the row stream.
*
* @param ris
* {@link Row}s iterator
*/
public
BufferedRowList(
Iterator<
Row>
ris) {
this.
rowList =
StreamSupport.
stream(
Spliterators.
spliteratorUnknownSize(
ris, 0), false).
collect(
Collectors.
toList());
}
public
Row next() {
if (this.
position + 1 == this.
rowList.
size()) {
throw new
NoSuchElementException("Can't next() when position=" + this.
position + " and size=" + this.
rowList.
size());
}
return this.
rowList.
get(++this.
position);
}
public
Row previous() {
if (this.
position < 1) {
throw new
NoSuchElementException("Can't previous() when position=" + this.
position);
}
return this.
rowList.
get(--this.
position);
}
public
Row get(int
n) {
if (
n < 0 ||
n >= this.
rowList.
size()) {
throw new
NoSuchElementException("Can't get(" +
n + ") when size=" + this.
rowList.
size());
}
return this.
rowList.
get(
n);
}
public int
getPosition() {
return this.
position;
}
public int
size() {
return this.
rowList.
size();
}
public boolean
hasNext() {
return this.
position + 1 < this.
rowList.
size();
}
}