Package org.incenp.obofoundry.sssom.transform

Class SSSOMTDuplicateFunction

java.lang.Object
org.incenp.obofoundry.sssom.transform.SSSOMTDuplicateFunction
All Implemented Interfaces:
IMappingFilter, ISSSOMTFunction<IMappingFilter>
public class SSSOMTDuplicateFunction extends Object implements ISSSOMTFunction<IMappingFilter>, IMappingFilter
Represents the SSSOM/T filter function "is_duplicate".

That function may be be used to select mappings for which a mapping-derived value is the same as another mapping. It expects one argument, which is the mapping-derived value to check against.

For example, to select mappings that have the same subject ID as a previous mapping: 

 is_duplicate(%{subject_id}) -> ...;

This could be used in conjunction with the stop() preprocessor to drop mappings that are considered "duplicates". For example, to drop all mappings that have the same subject/predicate/object triple except the first one: 

 is_duplicate("%{subject_id}%{predicate_id}%{object_id}") -> stop();

Or to drop all mappings that are entirely identical, except the first one (using the hash special substitution): 

 is_duplicate(%{hash}) -> stop();

  • Constructor Details

    • SSSOMTDuplicateFunction

      public SSSOMTDuplicateFunction(SSSOMTransformApplication<T> application)
      Creates a new instance.
      Type Parameters:
      T - The type of objects produced by the application.
      Parameters:
      application - The application this function is a part of.

  • Method Details

    • getName

      public String getName()
      Description copied from interface: ISSSOMTFunction
      Gets the name of the function, by which it can be called in a SSSOM/T ruleset.
      Specified by:
      getName in interface ISSSOMTFunction<IMappingFilter>
      Returns:
      The function name.

    • getSignature

      public String getSignature()
      Description copied from interface: ISSSOMTFunction
      Gets the expected signature of the function. It should be a string that represents how many arguments (excluding keyed arguments) the function is expecting, where a single S character represents an argument.

      Regular expression syntax may be used to represent arguments that are optional or represent other kinds of constraints about the arguments list.

      Examples:

      • SSS for a function that expects exactly 3 arguments;
      • S+ for a function that expects at least one argument, possibly more;
      • (SS)+ for a function that one or more pairs of arguments (e.g. 2, 4, 6, but not 3 or 5).
      Specified by:
      getSignature in interface ISSSOMTFunction<IMappingFilter>
      Returns:
      The function signature.

    • call

      public IMappingFilter call(List<String> arguments, Map<String,String> keyedArguments) throws SSSOMTransformError
      Description copied from interface: ISSSOMTFunction
      Executes the function.

      Before this method is called, the arguments list will have been checked against the signature and will be guaranteed to be correct (e.g. if the function declared to expects two arguments, it is guaranteed the arguments list will contains two items).

      Specified by:
      call in interface ISSSOMTFunction<IMappingFilter>
      Parameters:
      arguments - The arguments to the function. May be empty, but not null.
      keyedArguments - The keyed arguments to the function. May be empty, but null.
      Returns:
      The result of executing the function.
      Throws:
      SSSOMTransformError - If any error occurred when executing the function (which may include the case where the number of arguments was correct but their contents was not).

    • filter

      public boolean filter(Mapping mapping)
      Description copied from interface: IMappingFilter
      Check if a mapping satisfies a given condition.
      Specified by:
      filter in interface IMappingFilter
      Parameters:
      mapping - The mapping to test.
      Returns:
      true if the mapping satisfies the condition, false otherwise.