I'm trying to scrape together a class that builds AttributeDescriptor
objects from a DBaseFileHeader. I'm finding myself hip deep in the
Geotools feature model. (How did that happen?)
Because that is what we use to describe the valid values :-)
I need to ask some questions on the proper use of the
AttributeTypeImpl class:
- Is it allowable to pass null values to the constructor for the list
of restrictions, super type, and description?
Yes - please use an AttributeTypeBuilder it will be a bit nicer and
fill in those values as appropriate.
- restrictions if a Filter; if you are not restricted. FIlter.INCLUDES
should be fine
- super type - if you have no super type null is fine
- an empty description should be fine
- What does the "identified" field indicate? I can't figure out what
it represents, and subsequently, what value I should pass for this
field to the constructor.
Identified indicates if this is an object with its own "id" in the GML
sense; sometimes you can have a geometry that is shared by two
features for example. "false" is a good default value.
Finally please do use AttributeTypeBuilder as it will supply default
values for you...
AttributeTypeBuilder build = new AttributeTypeBuilder();
build.setNillable(true);
build.setBinding(String.class);
build.setName("Text");
AttributeType textType = build.buildType();
AttributeDescriptor descriptor = build.buildDescriptor( "name",
textType );
Examples are here (thanks justin for the examples):
- http://docs.codehaus.org/display/GEOTDOC/Feature+Model+Guide
Cheers,
Jody
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