Hi,
One of the requirements of the app I'm currently working on is to enter comma
delimited codes into a text area. I found the useful OneToManyTypeConverter,
which transparently allows my bean to use a Set<String>, while the user enters
a delimited string.
@Validate(converter=OneToManyTypeConverter.class)
Set<String> codes;
<stripes:textarea name="codes">1234, 2346, 2345</stripes:textarea>
That's pretty decent, but when the user goes to edit to set I just saved for
them, the population strategy doesn't provide a delimited string into the text
area. I initially figured it was due to the formatter factory not having an
inverse formatter, so I wrote my own OneToManyFormatter that loops over the
collection and builds a string. I subclassed formatter factory, added this
thing in there, but it never gets called. What's odd is the first item in the
set does show up in the text area as a string.
So I went digging through the code, and I found
InputTextAreaTag:
@Override
public int doEndInputTag() throws JspException {
try {
// Find out if we have a value from the PopulationStrategy
Object value = getSingleOverrideValue();
InputTagSupport:
protected Object getSingleOverrideValue() throws StripesJspException {
Object unknown = getOverrideValueOrValues();
Object returnValue = null;
if (unknown != null && unknown.getClass().isArray()) {
if (Array.getLength(unknown) > 0) {
returnValue = Array.get(unknown, 0);
}
}
else if (unknown != null && unknown instanceof Collection) {
Collection<?> collection = (Collection<?>) unknown;
if (collection.size() > 0) {
returnValue = collection.iterator().next();
}
}
else {
returnValue = unknown;
}
return returnValue;
}
So if a text area is trying to populate with a collection, all I can
potentially format is collection.iterator().next(); the formatter factory
never gets asked for the set formatter. The javadoc states:
"This can be used to ensure that
* only a single value is returned by the population strategy, which is
useful in the case
* of text inputs etc. which can have only a single value."
Right, but it doesn't allow the possibility of multiple values being later
formatted into a single one. I don't think this is ideal behavior. Thoughts?
Thanks,
John
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