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
SPARQLGroupPattern	applySolMapToGraphPattern(SolutionMapping sm)	Applies the given solution mapping to this graph pattern and returns the resulting graph pattern in which all occurrences of the variables bound by the given solution mapping are replaced by the RDF terms that the solution mappings assigns to these variables.
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).

Methods inherited from interface se.liu.ida.hefquin.base.query.SPARQLGraphPattern

getAllMentionedTPs, getAllMentionedVariables, getCertainVariables, getExpectedVariables, getNumberOfTermMentions, getNumberOfVarMentions, getPossibleVariables, mergeWith, mergeWith, mergeWith

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

applySolMapToGraphPattern

SPARQLGroupPattern applySolMapToGraphPattern(SolutionMapping sm)
                                      throws VariableByBlankNodeSubstitutionException

Description copied from interface: SPARQLGraphPattern

Applies the given solution mapping to this graph pattern and returns the resulting graph pattern in which all occurrences of the variables bound by the given solution mapping are replaced by the RDF terms that the solution mappings assigns to these variables.

Specified by:

applySolMapToGraphPattern in interface SPARQLGraphPattern

Throws:

VariableByBlankNodeSubstitutionException - if one of the variables would be replaced by a blank node