Package org.eclipse.rdf4j.sparqlbuilder.graphpattern

Interface GraphPattern

All Superinterfaces:

QueryElement

All Known Subinterfaces:

TriplePattern

All Known Implementing Classes:

Bind, GraphPatternNotTriples, SubSelect

public interface GraphPattern
extends QueryElement

Denotes a SPARQL Graph Pattern

See Also:

• SPARQL Graph Patterns

Method Summary

Modifier and Type	Method	Description
default GraphPattern	and(GraphPattern... patterns)	Convert this graph pattern into a group graph pattern, combining this graph pattern with the given patterns:
default GraphPattern	filter(Expression<?> constraint)	Convert this graph pattern into a group graph pattern and add a filter:
default GraphPattern	filterExists(boolean exists, GraphPattern... patterns)	Create an EXISTS or NOT EXISTS filter expression with the given patterns based on the exists paramater and add it to this graph pattern (converting this to a group graph pattern in the process)
default GraphPattern	filterExists(GraphPattern... patterns)	Create an EXISTS{} filter expression with the given graph patterns and add it to this graph pattern (converting this to a group graph pattern in the process):
default GraphPattern	filterNotExists(GraphPattern... patterns)	Create a NOT EXISTS{} filter expression with the given graph patterns and add it to this graph pattern (converting this to a group graph pattern in the process):
default GraphPattern	from(GraphName name)	Convert this graph pattern into a named group graph pattern:
default boolean	isEmpty()
default GraphPattern	minus(GraphPattern... patterns)	Create a MINUS graph pattern with the given graph patterns and add it to this graph pattern (converting this to a group graph pattern in the process):
default GraphPattern	optional()	Convert this graph pattern into an optional group graph pattern:
default GraphPattern	optional(boolean isOptional)	Specify if this graph pattern should be optional.
default GraphPattern	union(GraphPattern... patterns)	Convert this graph pattern into an alternative graph pattern, combining this graph pattern with the given patterns:

Methods inherited from interface org.eclipse.rdf4j.sparqlbuilder.core.QueryElement

getQueryString

Method Details

and

default GraphPattern and(GraphPattern... patterns)

Convert this graph pattern into a group graph pattern, combining this graph pattern with the given patterns:

 {
   thisPattern .
   pattern1 .
   pattern2 .
   ...
   patternN
 }
 

Parameters:

patterns - the patterns to add

Returns:

the new GraphPattern instance

See Also:

• SPARQL Group Graph Pattern

union

default GraphPattern union(GraphPattern... patterns)

Convert this graph pattern into an alternative graph pattern, combining this graph pattern with the given patterns:

 {
   { thisPattern } UNION
   { pattern1 } UNION
   { pattern2 } UNION
   ...
   { patternN }
 }
 

Parameters:

patterns - the patterns to add

Returns:

the new GraphPattern instance

See Also:

• SPARQL Alternative Graph Pattern

optional

default GraphPattern optional()

Convert this graph pattern into an optional group graph pattern:

 OPTIONAL {thisPattern}
 

Returns:

the new GraphPattern instance

See Also:

• SPARQL Optional Graph Patterns

optional

default GraphPattern optional(boolean isOptional)

Specify if this graph pattern should be optional.

NOTE: This converts this graph pattern into a group graph pattern.

Parameters:

isOptional - if this graph pattern should be optional or not

Returns:

the new GraphPattern instance

See Also:

• SPARQL Optional Graph Patterns

filter

default GraphPattern filter(Expression<?> constraint)

Convert this graph pattern into a group graph pattern and add a filter:

 {
   thisPattern
   FILTER { constraint }
 }
 

Parameters:

constraint - the filter constraint

Returns:

the new GraphPattern instance

See Also:

• SPARQL Filter

filterExists

default GraphPattern filterExists(GraphPattern... patterns)

Create an EXISTS{} filter expression with the given graph patterns and add it to this graph pattern (converting this to a group graph pattern in the process):

 {
        thisPattern
        FILTER EXISTS { patterns }
 }
 

Parameters:

patterns - the patterns to pass as arguments to the EXISTS expression

Returns:

the new GraphPattern instance

See Also:

• Filtering using Graph Pattern

filterNotExists

default GraphPattern filterNotExists(GraphPattern... patterns)

Create a NOT EXISTS{} filter expression with the given graph patterns and add it to this graph pattern (converting this to a group graph pattern in the process):

 {
        thisPattern
        FILTER NOT EXISTS { patterns }
 }
 

Parameters:

patterns - the patterns to pass as arguments to the NOT EXISTS expression

Returns:

the new GraphPattern instance

See Also:

• Filtering using Graph Pattern

filterExists

default GraphPattern filterExists(boolean exists,
 GraphPattern... patterns)

Create an EXISTS or NOT EXISTS filter expression with the given patterns based on the exists paramater and add it to this graph pattern (converting this to a group graph pattern in the process)

Parameters:

exists - if the filter should ensure the patterns exist or not

patterns - the patterns to pass to the filter

Returns:

the new GraphPattern instance

minus

default GraphPattern minus(GraphPattern... patterns)

Create a MINUS graph pattern with the given graph patterns and add it to this graph pattern (converting this to a group graph pattern in the process):

 {
        thisPattern
        MINUS { patterns }
 }
 

Parameters:

patterns - the patterns to construct the MINUS graph pattern with

Returns:

the new GraphPattern instance

See Also:

• SPARQL MINUS Graph Pattern

from

default GraphPattern from(GraphName name)

Convert this graph pattern into a named group graph pattern:

 GRAPH graphName { thisPattern }
 

Parameters:

name - the name to specify

Returns:

the new GraphPattern instance

See Also:

• Specifying Datasets in SPARQL Queries

isEmpty

default boolean isEmpty()

Returns:

if this pattern is a collection of GraphPatterns (ie., Group or Alternative patterns), returns if the collection contains any patterns