I am trying to make a TextArea that allows you to input a list of
strings (separated by a newline) and turns that list into a Collection.
I had it working but it was kind of hacked together, I'm trying to do it
the clean way now.
I have it working except for two things:
If I give it an empty collection for the model object then it display
square brackets [] inside the text area.
I don't have the conversion 100% working. Like when you have a
TextField<Date>, I'm trying to make it do the same thing to each line.
It works, but when it is an invalid value, instead of a nice error
message "X is not a valid Y" I get a runtime exception from whatever
IConverter I am using.
Source:
public final class CollectionTextArea<Type> extends
TextArea<Collection<Type>> {
private static final long serialVersionUID = 7147538499297387635L;
private Class<?> elementType;
public CollectionTextArea(final String id, final Class<?> elementType)
{
super(id);
setElementType(elementType);
}
public CollectionTextArea(final String id, final Class<?> elementType,
final IModel<Collection<Type>> model) {
super(id, model);
setElementType(elementType);
}
public Class<?> getElementType() {
return elementType;
}
public void setElementType(Class<?> elementType) {
this.elementType = elementType;
}
@Override
protected void onBeforeRender() {
super.onBeforeRender();
}
@Override
@SuppressWarnings("unchecked")
protected void convertInput() {
final String text = getRawInput();
final List<Type> lines = new ArrayList<Type>();
if (text != null) {
for (final String line: text.split("\\r\\n")) {
if (StringUtils.isNotBlank(line)) {
Type value = (Type)
getApplication().getConverterLocator().getConverter(getElementType()).convertToObject(line,
getLocale());
lines.add(value);
}
}
}
setConvertedInput(lines);
}
}
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