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public interface ProcessingFilter
Defines a type of filter-like processing which can be done on a StarTable.
An object in this class serves as a factory for
ProcessingStep
instances, based on a list of command-line
arguments.
Method Summary | |
---|---|
ProcessingStep |
createStep(Iterator argIt)
Creates a new ProcessingStep based on a sequence of command-line arguments. |
String |
getDescription()
Description for this filter. |
String |
getUsage()
Usage message for this filter. |
Method Detail |
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String getUsage()
String getDescription()
ProcessingStep createStep(Iterator argIt) throws ArgException
If the argument list is badly-formed as far as this filter is
concerned, an ArgException
should be thrown.
If its usageFrament
is blank, it will be filled in
later using this mode's usage text.
argIt
- iterator over command-line arguments positioned
at the first one
ArgException
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