/**
* ========================================
* JFreeReport : a free Java report library
* ========================================
*
* Project Info: http://reporting.pentaho.org/
*
* (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: ReportFormulaContext.java 3525 2007-10-16 11:43:48Z tmorgner $
* ------------
* (C) Copyright 2000-2005, by Object Refinery Limited.
* (C) Copyright 2005-2007, by Pentaho Corporation.
*/
package org.jfree.report.expressions;
import org.jfree.formula.ContextEvaluationException;
import org.jfree.formula.FormulaContext;
import org.jfree.formula.LibFormulaErrorValue;
import org.jfree.formula.LocalizationContext;
import org.jfree.formula.function.FunctionRegistry;
import org.jfree.formula.operators.OperatorFactory;
import org.jfree.formula.typing.Type;
import org.jfree.formula.typing.TypeRegistry;
import org.jfree.formula.typing.coretypes.AnyType;
import org.jfree.report.DataFlags;
import org.jfree.report.DataRow;
import org.jfree.report.DataSourceException;
import org.jfree.util.Configuration;
import org.jfree.util.Log;
/**
* Creation-Date: 29.11.2006, 17:54:33
*
* @author Thomas Morgner
*/
public class ReportFormulaContext implements FormulaContext
{
private FormulaContext backend;
private DataRow dataRow;
private Object declaringElement;
public ReportFormulaContext(final FormulaContext backend,
final DataRow dataRow)
{
this.backend = backend;
this.dataRow = dataRow;
}
public LocalizationContext getLocalizationContext()
{
return backend.getLocalizationContext();
}
public Configuration getConfiguration()
{
return backend.getConfiguration();
}
public FunctionRegistry getFunctionRegistry()
{
return backend.getFunctionRegistry();
}
public TypeRegistry getTypeRegistry()
{
return backend.getTypeRegistry();
}
public OperatorFactory getOperatorFactory()
{
return backend.getOperatorFactory();
}
public boolean isReferenceDirty(final Object name) throws ContextEvaluationException
{
try
{
final DataFlags flags = dataRow.getFlags(String.valueOf(name));
if (flags == null)
{
throw new ContextEvaluationException
(new LibFormulaErrorValue(LibFormulaErrorValue.ERROR_REFERENCE_NOT_RESOLVABLE));
}
return flags.isChanged();
}
catch(Exception e)
{
throw new ContextEvaluationException
(new LibFormulaErrorValue(LibFormulaErrorValue.ERROR_REFERENCE_NOT_RESOLVABLE));
}
}
public Type resolveReferenceType(final Object name)
{
return AnyType.TYPE;
}
public Object resolveReference(final Object name) throws ContextEvaluationException
{
if (name == null)
{
throw new NullPointerException();
}
try
{
return dataRow.get(String.valueOf(name));
}
catch (DataSourceException e)
{
Log.debug ("Error while resolving formula reference: ", e);
throw new ContextEvaluationException(new LibFormulaErrorValue
(LibFormulaErrorValue.ERROR_REFERENCE_NOT_RESOLVABLE));
}
}
public DataRow getDataRow()
{
return dataRow;
}
public void setDataRow(final DataRow dataRow)
{
this.dataRow = dataRow;
}
public Object getDeclaringElement()
{
return declaringElement;
}
public void setDeclaringElement(final Object declaringElement)
{
this.declaringElement = declaringElement;
}
}