/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.formula.lvalues;
/**
* A database is a two dimensional collection of data, arranged in a table. Although we do not assume that the whole
* database is held in memory, we allow random access of the data.
* <p/>
* Columns may have names, but there is no enforced requirement for that.
* <p/>
* As a database is not just a collection of raw data, this interface returns LValues instead of plain objects. Columns
* may be computed values using formulas (the exact semantics of adressing database cells in a formula is beyond the
* scope of this specification and is implementation specific).
*
* @author Thomas Morgner
*/
public interface DataTable extends LValue {
public int getRowCount();
public int getColumnCount();
public String getColumnName( int column );
public LValue getValueAt( int row, int column );
}