/*
* 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.demo;
import java.util.HashMap;
import javax.swing.JOptionPane;
import org.pentaho.reporting.libraries.formula.DefaultFormulaContext;
import org.pentaho.reporting.libraries.formula.typing.Type;
import org.pentaho.reporting.libraries.formula.typing.coretypes.AnyType;
/**
* A formula context that asks the user for input.
*
* @author Thomas Morgner
*/
public class DemoFormulaContext extends DefaultFormulaContext
{
private HashMap values;
public DemoFormulaContext()
{
values = new HashMap();
}
public Object resolveReference(final Object name)
{
final Object fromCache = values.get(name);
if (fromCache != null)
{
return fromCache;
}
final String input = JOptionPane.showInputDialog("Please enter a value for '" + name + '\'');
if (input != null)
{
values.put(name, input);
}
return input;
}
public Type resolveReferenceType(Object name)
{
// by returning the correct type of the reference, you can speed up
// the formula computation a little bit, as we dont have to guess the
// type from scratch.
// If you dont know the type, return ANYTYPE. We will start looking at
// the referenced object in that case.
return AnyType.TYPE;
}
}