Interface SchemaMapping

All Known Implementing Classes:
SchemaMappingImpl
public interface SchemaMapping
Maps from the global schema (considered RDF vocabularies) to a local schema of some data source(s) / federation member(s).

  • Method Summary

    Modifier and Type
    Method
    Description
    org.apache.jena.sparql.expr.Expr
    applyInverseToExpression(org.apache.jena.sparql.expr.Expr n)
    Applies this schema mapping to the given filter expression, which is assumed to use the local schema for the vocabulary terms mentioned in it, and returns the translated expression.
    Set<SolutionMapping>
    applyInverseToSolutionMapping(SolutionMapping solmap)
    Applies the inverse of this schema mapping to the given solution mapping, which is assumed to use the local schema for the vocabulary terms that it binds to its query variables.
    org.apache.jena.sparql.expr.Expr
    applyToExpression(org.apache.jena.sparql.expr.Expr n)
    Applies this schema mapping to the given filter expression, which is assumed to use the global schema for the vocabulary terms mentioned in it, and returns the translated expression.
    Set<SolutionMapping>
    applyToSolutionMapping(SolutionMapping solmap)
    Applies this schema mapping to the given solution mapping, which is assumed to use the global schema for the vocabulary terms that it binds to its query variables.
    SPARQLGraphPattern
    applyToTriplePattern(TriplePattern tp)
    Applies this mapping to the given triple pattern and returns the resulting graph pattern.
    boolean
    isEquivalenceOnly()
    Checks whether the schema mapping only contains equivalence rules, e.g., owl:equivalentClass, owl:equivalentProperty Return true if the schema mapping consists solely of equivalence rules, false otherwise.

  • Method Details

    • applyToTriplePattern

      SPARQLGraphPattern applyToTriplePattern(TriplePattern tp)
      Applies this mapping to the given triple pattern and returns the resulting graph pattern. If this mapping is not relevant for the 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 the given triple pattern itself.

    • applyToExpression

      org.apache.jena.sparql.expr.Expr applyToExpression(org.apache.jena.sparql.expr.Expr n)
      Applies this schema mapping to the given filter expression, which is assumed to use the global schema for the vocabulary terms mentioned in it, and returns the translated expression. If this schema mapping is not relevant for the given expression (i.e., applying this schema 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 n)
      Applies this schema mapping to the given filter expression, which is assumed to use the local schema for the vocabulary terms mentioned in it, and returns the translated expression. If this schema mapping is not relevant for the given expression (i.e., applying this schema 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 schema mapping to the given solution mapping, which is assumed to use the global schema for the vocabulary terms that it binds to its query variables. If this schema mapping is not relevant for anything mentioned in the given solution mapping (i.e., applying this schema 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 schema mapping to the given solution mapping, which is assumed to use the local schema for the vocabulary terms that it binds to its query variables. If this schema mapping is not relevant for anything mentioned in the given solution mapping (i.e., applying the inverse of this schema 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.

    • isEquivalenceOnly

      boolean isEquivalenceOnly()
      Checks whether the schema mapping only contains equivalence rules, e.g., owl:equivalentClass, owl:equivalentProperty Return true if the schema mapping consists solely of equivalence rules, false otherwise.