Interface EntityMapping

All Known Implementing Classes:
EntityMappingImpl
public interface EntityMapping
Maps from the global representation of entities to a local representation that is specific to a particular data source (federation member).

  • Method Summary

    Modifier and Type
    Method
    Description
    org.apache.jena.sparql.expr.Expr
    applyInverseToExpression(org.apache.jena.sparql.expr.Expr e)
    Applies this entity mapping to the given filter expression, which is assumed to use the local representation of the entities mentioned in it, and returns the translated expression.
    Set<SolutionMapping>
    applyInverseToSolutionMapping(SolutionMapping solmap)
    Applies the inverse of this entity mapping to the given solution mapping, which is assumed to use the local representation of the entities that it binds to its query variables.
    org.apache.jena.sparql.expr.Expr
    applyToExpression(org.apache.jena.sparql.expr.Expr e)
    Applies this entity mapping to the given filter expression, which is assumed to use the global representation of the entities mentioned in it, and returns the translated expression.
    Set<SolutionMapping>
    applyToSolutionMapping(SolutionMapping solmap)
    Applies this entity mapping to the given solution mapping, which is assumed to use the global representation of the entities that it binds to its query variables.
    Set<TriplePattern>
    applyToTriplePattern(TriplePattern tp)
    Applies this mapping to the given triple pattern and returns the resulting set of triple patterns that is meant to be used as a union.

  • Method Details

    • applyToTriplePattern

      Set<TriplePattern> applyToTriplePattern(TriplePattern tp)
      Applies this mapping to the given triple pattern and returns the resulting set of triple patterns that is meant to be used as a union. If this mapping is not relevant for any of the entities mentioned in the given triple pattern (i.e., applying the mapping to the triple pattern does not have any effect), then the result of this function is simply a singleton set that contains the given triple pattern without any changes.

    • applyToExpression

      org.apache.jena.sparql.expr.Expr applyToExpression(org.apache.jena.sparql.expr.Expr e)
      Applies this entity mapping to the given filter expression, which is assumed to use the global representation of the entities mentioned in it, and returns the translated expression. If this entity mapping is not relevant for the given expression (i.e., applying this entity mapping does not change the expression), then the result of this function is simply the given expression itself.

      It may not be possible to translate every expression; if the given expression cannot be translated, then this method throws an UnsupportedOperationException.

    • applyInverseToExpression

      org.apache.jena.sparql.expr.Expr applyInverseToExpression(org.apache.jena.sparql.expr.Expr e)
      Applies this entity mapping to the given filter expression, which is assumed to use the local representation of the entities mentioned in it, and returns the translated expression. If this entity mapping is not relevant for the given expression (i.e., applying this entity mapping does not change the expression), then the result of this function is simply the given expression itself.

      It may not be possible to translate every expression; if the given expression cannot be translated, then this method throws an UnsupportedOperationException.

    • applyToSolutionMapping

      Set<SolutionMapping> applyToSolutionMapping(SolutionMapping solmap)
      Applies this entity mapping to the given solution mapping, which is assumed to use the global representation of the entities that it binds to its query variables. If this entity mapping is not relevant for any of the entities mentioned in the given solution mapping (i.e., applying this entity mapping to the solution mapping does not have any effect), then the result of this function is simply a singleton set that contains the given solution mapping without any changes.

    • applyInverseToSolutionMapping

      Set<SolutionMapping> applyInverseToSolutionMapping(SolutionMapping solmap)
      Applies the inverse of this entity mapping to the given solution mapping, which is assumed to use the local representation of the entities that it binds to its query variables. If this entity mapping is not relevant for any of the entities mentioned in the given solution mapping (i.e., applying this entity mapping to the solution mapping does not have any effect), then the result of this function is simply a singleton set that contains the given solution mapping without any changes.