Bug 208168 Meaningless exception occurs when sorting condition refer to a unused binding[07]
Description: Meaningless exception occurs when sorting condition refer to a unused binding[07] Build number: 2.3.0.v2007-0800 Steps to reproduce: 1, New a table binding with a dataset 2, Define a Sort for the table 3, Delete the binding of table which is using by sorting condition 4, Preview Expected result: The exception should be meaningful. Actual result: Exception is meaningless for user to clear the mistake point Error log: An error happen during population of data. This might be caused by including data of mixed type in a column of "ANY" type
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ComputedColumnHelper.java
dataSetCCList,
				availableCCList );
		this.availableModeInstance = new ComputedColumnHelperInstance( dataSet,
				availableCCList );
		this.currentModel = this.dataSetInstance;
		this.allCC = new ArrayList( );
		this.allCC.addAll( dataSetCCList );
		this.allCC.addAll( resultSetCCList );
		logger.exiting( ComputedColumnHelper.class.getName( ), "ComputedColumnHelper" );
	}
	/**
	 * 
	 * @return
	 */
	private ComputedColumnHelperInstance getCurrentInstance( )
	{
		return this.currentModel;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.data.engine.odi.IResultObjectEvent#process(org.eclipse.birt.data.engine.odi.IResultObject,
	 *      int)
	 */
	public boolean process( IResultObject resultObject, int rowIndex )
			throws DataException
	{
		if ( this.getCurrentInstance( ) != null )
			return this.getCurrentInstance( ).process( resultObject, rowIndex );
		else