Bug 131011 Support running query based on report document data
Data Engine should support running a query based on data set and expression data stored in a report document. This bugzilla entry serves as a repository for design docs and notes related to this feature.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
rService = null;
		state = CLOSED;
		logger.logp( Level.FINE,
				ResultIterator.class.getName( ),
				"close",
				"a ResultIterator is closed" );
	}
	
	/**
	 * Only for CachedResultSet test case
	 * 
	 * @return
	 */
	org.eclipse.birt.data.engine.odi.IResultIterator getOdiResult( )
	{
		return odiResult;
	}
	/*
	 * @see org.eclipse.birt.data.engine.api.IResultIterator#findGroup(java.lang.Object[])
	 */
	public boolean findGroup( Object[] groupKeyValues ) throws BirtException
	{
		if ( groupUtil == null )
			groupUtil = new GroupUtil( this.rService.getQueryDefn( ), this );
		return groupUtil.findGroup( groupKeyValues );
	}
	/**
	 * Util class to findGroup
	 */
	private class GroupUtil