Bug 157681 PDF Report Generated With Layout But No Data
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFAbstractLM.java
if(!IStyle.NONE_VALUE.equals(style.getProperty( IStyle.STYLE_DISPLAY )))
			{
				ListValue formats = (ListValue)style.getProperty( IStyle.STYLE_VISIBLE_FORMAT );
				if(formats.getLength( )==0)
				{
					return false;
				}
				else
				{
					String format = context.getFormat( );
					for(int i=0; i<formats.getLength( ); i++)
					{
						String hiddenFormat = formats.item( i ).getCssText( );
						if(format.equalsIgnoreCase( hiddenFormat ) 
								|| BIRTConstants.BIRT_ALL_VALUE.equalsIgnoreCase(hiddenFormat) )
						{
							return true;
						}
					}
					return false;
				}
			}
			else
			{
				return true;
			}
		}
		return false;
	}
	protected void calculateSpecifiedHeight( )