Bug 162713 [regression]Parameter value changed when set Medium Date format and preview in Layout
Description: Parameter value changed when set Medium Date format and preview in Layout Test environment: Eclipse3.2.1 Preference locale: Hebrew Steps to reproduce: 1. New a report parameter, datetime type, input default value as 03/20/2005 12:00:00 AM, set format as Medium Date. 2. Drag it to Layout and preview in Layout. Expected result: 00:00 03/20/2006 Actual result: 00:00 03/08/2006 Error logs: none
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
{
			e.printStackTrace( );
		}
		
		ScalarParameterHandle parameter = (ScalarParameterHandle) findParameter( paramName );
		
		if ( defaultValueObj != null && parameter != null )
		{
			String dataType = parameter.getDataType( );
			String pattern = parameter.getPattern( );
			if ( DesignChoiceConstants.PARAM_TYPE_DATETIME
					.equalsIgnoreCase( dataType ) )
			{
				
				return defaultValueObj;
			}
			if ( DesignChoiceConstants.PARAM_TYPE_STRING
					.equalsIgnoreCase( dataType ) )
			{
				pattern = null;
			}
			defalutValue = ParameterValidationUtil.getDisplayValue( null,
					pattern, defaultValueObj, locale );	
		}
		
		if ( defalutValue == null && parameter != null )
		{
			defalutValue = parameter.getDefaultValue( );
		}
		return defalutValue;