org.apache.clerezza.sparql.query.impl

Class SimpleGroupGraphPattern

java.lang.Object

org.apache.clerezza.sparql.query.impl.SimpleGroupGraphPattern

All Implemented Interfaces:

GraphPattern, GroupGraphPattern

public class SimpleGroupGraphPattern
extends Object
implements GroupGraphPattern

This class implements GroupGraphPattern.

Author:

hasan

Constructor Summary

Constructors

Constructor and Description
SimpleGroupGraphPattern()

Method Summary

Modifier and Type	Method and Description
void	addConstraint(Expression constraint) Adds a constraint to the GroupGraphPattern.
void	addGraphPattern(GraphPattern graphPattern) Adds a GraphPattern to the group.
void	addMinusGraphPattern(GroupGraphPattern subtrahend)
void	addOptionalGraphPattern(GroupGraphPattern optional) Adds an OptionalGraphPattern to the group consisting of a main ImmutableGraph pattern and the specified GroupGraphPattern as the optional pattern.
void	addPropertyPathPatterns(Set<PropertyPathPattern> propertyPathPatterns) If the last GraphPattern added to the group is not a SimplePathSupportedBasicGraphPattern, then creates one containing the specified PropertyPathPatterns and adds it to the group.
void	addTriplePatterns(Set<TriplePattern> triplePatterns) If the last GraphPattern added to the group is not a SimpleBasicGraphPattern, then creates one containing the specified TriplePatterns and adds it to the group.
void	endLastBasicGraphPattern()
List<Expression>	getFilter()
Set<GraphPattern>	getGraphPatterns()
Set<IRI>	getReferredGraphs()
SelectQuery	getSubSelect()
boolean	isSubSelect()
void	setSubSelect(SelectQuery subSelect)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleGroupGraphPattern

public SimpleGroupGraphPattern()

Method Detail

isSubSelect

public boolean isSubSelect()

Specified by:

isSubSelect in interface GroupGraphPattern

Returns:

true if it wraps a SelectQuery, false otherwise.

getSubSelect

public SelectQuery getSubSelect()

Specified by:

getSubSelect in interface GroupGraphPattern

Returns:

the wrapped subselect if it wraps a SelectQuery, null otherwise.

getGraphPatterns

public Set<GraphPattern> getGraphPatterns()

Specified by:

getGraphPatterns in interface GroupGraphPattern

Returns:

null if it wraps a SelectQuery, otherwise a set of all patterns, ANDed together.

getFilter

public List<Expression> getFilter()

Specified by:

getFilter in interface GroupGraphPattern

Returns:

null if it wraps a SelectQuery, otherwise a list of filter expressions for all patterns in the group if any.

setSubSelect

public void setSubSelect(SelectQuery subSelect)

addGraphPattern

public void addGraphPattern(GraphPattern graphPattern)

Adds a GraphPattern to the group.

Parameters:

graphPattern - the GraphPattern to be added.

addConstraint

public void addConstraint(Expression constraint)

Adds a constraint to the GroupGraphPattern.

Parameters:

constraint - an Expression as the constraint to be added.

endLastBasicGraphPattern

public void endLastBasicGraphPattern()

addPropertyPathPatterns

public void addPropertyPathPatterns(Set<PropertyPathPattern> propertyPathPatterns)

If the last GraphPattern added to the group is not a SimplePathSupportedBasicGraphPattern, then creates one containing the specified PropertyPathPatterns and adds it to the group. Otherwise, adds the specified PropertyPathPatterns to the last added SimplePathSupportedBasicGraphPattern in the group.

Parameters:

propertyPathPatterns - a set of PropertyPathPatterns to be added into a SimplePathSupportedBasicGraphPattern of the group.

addTriplePatterns

public void addTriplePatterns(Set<TriplePattern> triplePatterns)

If the last GraphPattern added to the group is not a SimpleBasicGraphPattern, then creates one containing the specified TriplePatterns and adds it to the group. Otherwise, adds the specified TriplePatterns to the last added SimpleBasicGraphPattern in the group.

Parameters:

triplePatterns - a set of TriplePatterns to be added into a SimpleBasicGraphPattern of the group.

addOptionalGraphPattern

public void addOptionalGraphPattern(GroupGraphPattern optional)

Adds an OptionalGraphPattern to the group consisting of a main ImmutableGraph pattern and the specified GroupGraphPattern as the optional pattern. The main ImmutableGraph pattern is taken from the last added GraphPattern in the group, if it exists. Otherwise, the main ImmutableGraph pattern is null.

Parameters:

optional - a GroupGraphPattern as the optional pattern of an OptionalGraphPattern.

addMinusGraphPattern

public void addMinusGraphPattern(GroupGraphPattern subtrahend)

getReferredGraphs

public Set<IRI> getReferredGraphs()

Specified by:

getReferredGraphs in interface GroupGraphPattern

Returns:

all graphs referred in this ImmutableGraph pattern.