Package se.liu.ida.hefquin.base.query

Interface SPARQLGroupPattern

All Superinterfaces:
Query, SPARQLGraphPattern
All Known Implementing Classes:
SPARQLGroupPatternImpl
public interface SPARQLGroupPattern extends SPARQLGraphPattern
A SPARQL group pattern represents a collection of SPARQL graph patterns for which the results are meant to be joined. Hence, when considering an algebraic representation of SPARQL queries, the algebraic operator that corresponds to such a group pattern is a multiway join.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    getNumberOfSubPatterns()
    Returns the number of graph patterns that are combined in this group pattern.
    Iterable<SPARQLGraphPattern>
    getSubPatterns()
    Returns all graph patterns that are combined in this group pattern.
    SPARQLGraphPattern
    getSubPatterns(int i)
    Returns the i-th of the graph patterns that are combined in this group pattern, where i starts at index 0 (zero).

  • Method Details

    • getNumberOfSubPatterns

      int getNumberOfSubPatterns()
      Returns the number of graph patterns that are combined in this group pattern.

    • getSubPatterns

      Iterable<SPARQLGraphPattern> getSubPatterns()
      Returns all graph patterns that are combined in this group pattern.

    • getSubPatterns

      SPARQLGraphPattern getSubPatterns(int i) throws IndexOutOfBoundsException
      Returns the i-th of the graph patterns that are combined in this group pattern, where i starts at index 0 (zero). If this group pattern has fewer sub-patterns, then an IndexOutOfBoundsException will be thrown.
      Throws:
      IndexOutOfBoundsException