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/document/RDGroupUtil.java
{
					GroupInfo groupInfo = new GroupInfo( );
					groupInfo.parent = IOUtil.readInt( inputStream );
					groupInfo.firstChild = IOUtil.readInt( inputStream );
					list.add( groupInfo );
				}
				this.groups[i] = list;
			}
		}
		catch ( IOException e )
		{
			throw new DataException( ResourceConstants.RD_LOAD_ERROR,
					e,
					"Group Info" );
		}
		
		this.cacheProvider = cacheProvider;
	}
	
	
	
	
	private GroupInfo findGroup( int groupLevel, int groupIndex )
	{
		if ( groupIndex >= groups[groupLevel].size( ) )
			return null;
		else
			return (GroupInfo) groups[groupLevel].get( groupIndex );
	}
	private void checkStarted( ) throws DataException