Bug 168148 [regression]Table with chart from library fails to preview.[01][0001]
Description: Table with chart from library fails to preview. Build number:2.1.2.v20061215 and 2.2.0.v20061213 Steps to reproduce: 1.Create a library, create a sample DB data source and data set: select * from orders 2.Insert a tabel to the library, bind data set to the table 3.Insert a group for the tabel ,group by "row["OrderDate"]", Interval: Year, Range:1 4.Drag a chart into 3rd cell on group row, bar chart, go to "Select Data" tab , bind data set, X Series:row["OrderDate"], Y Series:row["OrderNumger"]; click "Finish" button 5.Create a new report, use the library 6.Drag the table in the library to the report. 7.Preview in html. Expected Result: Report content displays without errors. Actual result: Error happened while running the report.(same for 2.1.2 and 2.2.0) Error log: org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/extension/PeerExtensibilityProvider.java
retValue = stream.toString( UnicodeUtil.SIGNATURE_UTF_8 );
				}
				catch ( UnsupportedEncodingException e )
				{
					assert false;
				}
				return retValue;
			}
		}
		else if ( isExtensionModelProperty( propName ) )
		{
			
			
			assert reportItem != null;
			return reportItem.getProperty( propName );
		}
		return extensionPropValues.get( propName );
	}
	/**
	 * Sets the value for extension property or extension model property.
	 * 
	 * @param prop
	 *            the definition of the property
	 * @param value
	 *            the value to set
	 */
	public void setExtensionProperty( ElementPropertyDefn prop, Object value )
	{
		if ( isExtensionXMLProperty( prop.getName( ) )
				&& hasOwnModel( prop.getName( ) ) )