> I have a html form input that submits a string value that needs to be converted to a java Collection.
To find the bug in logic I would hard code a string which is expected from html input form. Using an IDE . Set a break point there to go into debug mode. Step through the code one step at a time. Watch the string values changes In the debug window. Then you can see the data values change as expected or not at each step. zahid https://www.backbutton.org ¯\_(ツ)_/¯ ♡۶♡۶ ♡۶ On Wed, 11 Aug 2021, 13:50 Burton Rhodes, <burtonrho...@gmail.com> wrote: > I have a html form input that submits a string value that needs to be > converted to a java Collection (a Set object in this case). Specifically > the input key/value is: viewTasksFilter.taskStatuses="[OPEN,COMPLETE]". > In the "viewTaskFilter" object, "taskStatuses" is defined as a Set with > enum values (Set<TaskStatus> taskStatuses). The custom converter below > does convert the input form value to a Set, however it is a Set<String> > (not Set<TaskStatus>). This is an issue because the Struts Action member > variable "viewTasksFilter.taskStatuses" now contains a Set of the wrong > type. Since I will have other variables that need this logic, I would > prefer not to hardcode the Set<TaskStatus> in this converter. Is there a > way to use existing Struts "converter code" to convert the Set<String> to > the appropriate Set<Object>? I know the built-in Struts converters already > do this, but I am unable to figure out how to do this in a custom > converter. Is this possible? Or is this even the right way to solve this > issue? Any help is appreciated! > > > /** > * Converter class to convert comma separated string to a collection > */ > public class MyStringToCollectionConverter extends StrutsTypeConverter { > > @Override > public Object convertFromString(Map context, String[] values, Class > toClass) { > > String s = values[0]; > String temp = s.replaceAll("[\\[\\]\"']", ""); > List<String> cleanedValues = Arrays.stream(temp.split(",")) > .map(String::trim) > .collect(Collectors.toList()); > > if (toClass == Set.class) { > try { > if (cleanedValues.size() == 0) { > return null; > } else { > return new HashSet<>(cleanedValues); > } > } catch (Exception e) { > throw new TypeConversionException("Could not parse to Set > class:" + Arrays.toString(values)); > } > > } else if (toClass == List.class) { > try { > if (cleanedValues.size() == 0) { > return null; > } else { > return cleanedValues; > } > } catch (Exception e) { > throw new TypeConversionException("Could not parse to List > class:" + Arrays.toString(values)); > } > > } > > return null; > } > > @Override > public String convertToString(Map context, Object o) { > if (o == null) { > return null; > } else { > return o.toString(); > } > } > } >
