Bug 153214 Data in integer column cannot be imported to report paramter
Description: Data in integer column cannot be imported to report paramter Steps to reproduce: 1. New birt sample data source and dataset from CUSTOMERS 2. New a report parameter, integer, list-box, static 3. Click Import button, select customers dataset Expected result: Integer columns are listed in Select Column list actual result: No available columns for selection but actually CUSTOMERNUMBER column is integer type column
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
|| formatCategroy == DesignChoiceConstants.NUMBER_FORMAT_TYPE_CUSTOM
						|| formatCategroy == DesignChoiceConstants.DATETIEM_FORMAT_TYPE_CUSTOM )
				{
					displayFormat += ": " + formatPattern; 
				}
				if ( type.equals( DesignChoiceConstants.PARAM_TYPE_DATETIME ) )
				{
					previewString = new DateFormatter( DesignChoiceConstants.DATETIEM_FORMAT_TYPE_CUSTOM.equals( formatCategroy ) ? formatPattern
							: formatCategroy,
							ULocale.getDefault( ) ).format( new Date( ) );
				}
				else if ( type.equals( DesignChoiceConstants.PARAM_TYPE_STRING ) )
				{
					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 )