Bug 151794 Integer data can't be retrieved in dynamic parameter
Steps to reproduce: 1.New a sample data source and a data set from table "CUSTOMERS" 2.New a dynamic parameter, choose data type "Integer" Expected result: Those integer data set columns are listed in "Select value column" Actual result: No column available
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
{
					previewString = new StringFormatter( formatCategroy != DesignChoiceConstants.STRING_FORMAT_TYPE_CUSTOM ? formatCategroy
							: formatPattern,
							ULocale.getDefault( ) ).format( Messages.getString( "ParameterDialog.Label.Sample" ) ); 
				}
				else
				{
					previewString = new NumberFormatter( formatCategroy != DesignChoiceConstants.NUMBER_FORMAT_TYPE_CUSTOM ? formatCategroy
							: formatPattern,
							ULocale.getDefault( ) ).format( 123456789.01234 );
				}
			}
		}
		formatField.setText( displayFormat );
		previewLabel.setText( convertNullString( previewString ) );
		changeFormat.setEnabled( choiceSet != null );
	}
	private String convertNullString( String str )
	{
		if ( str == null )
		{
			return "";
		}
		return str;
	}
	private boolean containValue( SelectionChoice selectedChoice,
			String newValue, String property )
	{
		for ( Iterator iter = choiceList.iterator( ); iter.hasNext( ); )
		{