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
if ( extDefn == null )
			return props;
		
		IPropertyDefinition[] dynamicProps = getExtensionModelPropertyDefns( );
		if ( dynamicProps != null )
		{
			for ( int i = 0; i < dynamicProps.length; i++ )
			{
				IPropertyDefinition extProp = dynamicProps[i];
				props.add( new ExtensionModelPropertyDefn( extProp, extDefn
						.getReportItemFactory( ).getMessages( ) ) );
			}
		}
		return props;
	}
	/**
	 * Returns the methods defined on the element. Not only the method on the
	 * extension element definition but also include those defined inside the
	 * extension model.
	 * 
	 * @return the method list
	 */
	public List getModelMethodDefns( )
	{
		List methods = new ArrayList( );
		PeerExtensionElementDefn extDefn = (PeerExtensionElementDefn) getExtDefn( );
		if ( extDefn == null )
			return null;