Class Query<T extends Query<T>>
- java.lang.Object
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- org.eclipse.rdf4j.sparqlbuilder.core.query.Query<T>
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- Type Parameters:
T
- They type of query. Used to support fluency.
- All Implemented Interfaces:
QueryElement
- Direct Known Subclasses:
OuterQuery
,SubSelect
public abstract class Query<T extends Query<T>> extends Object implements QueryElement
The base class for all SPARQL Queries. Contains elements and methods common to all queries.
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Field Summary
Fields Modifier and Type Field Description protected int
bnodeCount
protected Optional<Dataset>
from
protected Optional<GroupBy>
groupBy
protected Optional<Having>
having
protected int
limit
protected static String
LIMIT
protected int
offset
protected static String
OFFSET
protected Optional<OrderBy>
orderBy
protected int
varCount
protected QueryPattern
where
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Constructor Summary
Constructors Constructor Description Query()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description RdfBlankNode.LabeledBlankNode
bNode()
A shortcut.T
from(Dataset from)
Set the Dataset clause for this queryT
from(From... graphs)
Add datasets to this queryprotected abstract String
getQueryActionString()
String
getQueryString()
T
groupBy(Groupable... groupables)
Add grouping specifiers for the query results.T
groupBy(GroupBy groupBy)
Set this query's Group By clauseT
having(Expression<?>... constraints)
Specify constraints for this query's Having clause.T
having(Having having)
Set this query's Having clauseT
limit(int limit)
Set a limit on the number of results returned by this query.T
offset(int offset)
Specify an offset in query results.T
orderBy(Orderable... conditions)
Specify orderings for the query resultsT
orderBy(OrderBy orderBy)
Set this query's Order By clauseVariable
var()
A shortcut.T
where(QueryPattern where)
Set the query pattern of this queryT
where(GraphPattern... queryPatterns)
Add graph patterns to this query's query pattern
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Field Detail
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LIMIT
protected static final String LIMIT
- See Also:
- Constant Field Values
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OFFSET
protected static final String OFFSET
- See Also:
- Constant Field Values
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where
protected QueryPattern where
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limit
protected int limit
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offset
protected int offset
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varCount
protected int varCount
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bnodeCount
protected int bnodeCount
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Method Detail
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from
public T from(From... graphs)
Add datasets to this query- Parameters:
graphs
- the graph specifiers to add- Returns:
- this
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from
public T from(Dataset from)
Set the Dataset clause for this query- Parameters:
from
- theDataset
clause to set- Returns:
- this
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where
public T where(GraphPattern... queryPatterns)
Add graph patterns to this query's query pattern- Parameters:
queryPatterns
- the patterns to add- Returns:
- this
- See Also:
QueryPattern
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where
public T where(QueryPattern where)
Set the query pattern of this query- Parameters:
where
- the query pattern to set- Returns:
- this
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groupBy
public T groupBy(Groupable... groupables)
Add grouping specifiers for the query results.- Parameters:
groupables
- the objects to group on, in order (appended to the end of any existing grouping specifiers)- Returns:
- this
- See Also:
GroupBy
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groupBy
public T groupBy(GroupBy groupBy)
Set this query's Group By clause- Parameters:
groupBy
- theGroupBy
clause to set- Returns:
- this
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orderBy
public T orderBy(Orderable... conditions)
Specify orderings for the query results- Parameters:
conditions
- the objects to order on, in order- Returns:
- this
- See Also:
OrderBy
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orderBy
public T orderBy(OrderBy orderBy)
Set this query's Order By clause- Parameters:
orderBy
- theOrderBy
clause to set- Returns:
- this
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having
public T having(Expression<?>... constraints)
Specify constraints for this query's Having clause.- Parameters:
constraints
- the constraints to add to the clause- Returns:
- this
- See Also:
Having
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having
public T having(Having having)
Set this query's Having clause- Parameters:
having
- the Having clause to set- Returns:
- this
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limit
public T limit(int limit)
Set a limit on the number of results returned by this query.- Parameters:
limit
-- Returns:
- this
- See Also:
- Limits in SPARQL Queries
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offset
public T offset(int offset)
Specify an offset in query results.- Parameters:
offset
-- Returns:
- this
- See Also:
- Offsets in SPARQL Queries
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var
public Variable var()
A shortcut. Each call to this method returns a newVariable
that is unique (i.e., has a unique alias) to this query instance.- Returns:
- a
Variable
object that is unique to this query instance
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bNode
public RdfBlankNode.LabeledBlankNode bNode()
A shortcut. Each call to this method returns a newRdfBlankNode.LabeledBlankNode
that is unique (i.e., has a unique alias) to this query instance.- Returns:
- a
RdfBlankNode.LabeledBlankNode
object that is unique to this query instance
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getQueryActionString
protected abstract String getQueryActionString()
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getQueryString
public String getQueryString()
- Specified by:
getQueryString
in interfaceQueryElement
- Returns:
- the String representing the SPARQL syntax of this element
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