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/*
Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation; version 2
of the License.
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 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.jdbc;
import java.sql.SQLException;
import java.util.List;
/**
* Represents an in-memory result set
*/
public class RowDataStatic implements RowData {
private Field[] metadata;
private int index;
ResultSetImpl owner;
private List<ResultSetRow> rows;
/**
* Creates a new RowDataStatic object.
*
* @param rows
*/
public RowDataStatic(List<ResultSetRow> rows) {
this.index = -1;
this.rows = rows;
}
public void addRow(ResultSetRow row) {
this.rows.add(row);
}
/**
* Moves to after last.
*/
public void afterLast() {
if (this.rows.size() > 0) {
this.index = this.rows.size();
}
}
/**
* Moves to before first.
*/
public void beforeFirst() {
if (this.rows.size() > 0) {
this.index = -1;
}
}
public void beforeLast() {
if (this.rows.size() > 0) {
this.index = this.rows.size() - 2;
}
}
public void close() {
}
public ResultSetRow getAt(int atIndex) throws SQLException {
if ((atIndex < 0) || (atIndex >= this.rows.size())) {
return null;
}
return (this.rows.get(atIndex)).setMetadata(this.metadata);
}
public int getCurrentRowNumber() {
return this.index;
}
/**
* @see com.mysql.jdbc.RowData#getOwner()
*/
public ResultSetInternalMethods getOwner() {
return this.owner;
}
public boolean hasNext() {
boolean hasMore = (this.index + 1) < this.rows.size();
return hasMore;
}
/**
* Returns true if we got the last element.
*/
public boolean isAfterLast() {
return this.index >= this.rows.size() && this.rows.size() != 0;
}
/**
* Returns if iteration has not occurred yet.
*/
public boolean isBeforeFirst() {
return this.index == -1 && this.rows.size() != 0;
}
public boolean isDynamic() {
return false;
}
public boolean isEmpty() {
return this.rows.size() == 0;
}
public boolean isFirst() {
return this.index == 0;
}
public boolean isLast() {
//
// You can never be on the 'last' row of an empty result set
//
if (this.rows.size() == 0) {
return false;
}
return (this.index == (this.rows.size() - 1));
}
public void moveRowRelative(int rowsToMove) {
if (this.rows.size() > 0) {
this.index += rowsToMove;
if (this.index < -1) {
beforeFirst();
} else if (this.index > this.rows.size()) {
afterLast();
}
}
}
public ResultSetRow next() throws SQLException {
this.index++;
if (this.index > this.rows.size()) {
afterLast();
} else if (this.index < this.rows.size()) {
ResultSetRow row = this.rows.get(this.index);
return row.setMetadata(this.metadata);
}
return null;
}
public void removeRow(int atIndex) {
this.rows.remove(atIndex);
}
public void setCurrentRow(int newIndex) {
this.index = newIndex;
}
/**
* @see com.mysql.jdbc.RowData#setOwner(com.mysql.jdbc.ResultSetInternalMethods)
*/
public void setOwner(ResultSetImpl rs) {
this.owner = rs;
}
public int size() {
return this.rows.size();
}
public boolean wasEmpty() {
return (this.rows != null && this.rows.size() == 0);
}
public void setMetadata(Field[] metadata) {
this.metadata = metadata;
}
}