Interface SPARQLUnionPattern

All Superinterfaces:

Query, SPARQLGraphPattern

All Known Implementing Classes:

SPARQLUnionPatternImpl

public interface SPARQLUnionPattern
extends SPARQLGraphPattern

A SPARQL union pattern represents a collection of SPARQL graph patterns for which the results are meant to be combined via union. Hence, when considering an algebraic representation of SPARQL queries, the algebraic operator that corresponds to such a union pattern is a multiway union.

Method Summary

Modifier and Type	Method	Description
SPARQLUnionPattern	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 via this union operator.
Iterable<SPARQLGraphPattern>	getSubPatterns()	Returns all graph patterns that are combined via this union operator.
SPARQLGraphPattern	getSubPatterns(int i)	Returns the i-th of the graph patterns that are combined via this union operator, 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 via this union operator.

getSubPatterns

Iterable<SPARQLGraphPattern> getSubPatterns()

Returns all graph patterns that are combined via this union operator.

getSubPatterns

SPARQLGraphPattern getSubPatterns(int i)
                           throws IndexOutOfBoundsException

Returns the i-th of the graph patterns that are combined via this union operator, where i starts at index 0 (zero). If the union operator has fewer sub-patterns, then an IndexOutOfBoundsException will be thrown.

Throws:

IndexOutOfBoundsException

applySolMapToGraphPattern

SPARQLUnionPattern 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