Package org.eclipse.rdf4j.query.algebra
Class Service
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
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- org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
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- org.eclipse.rdf4j.query.algebra.Service
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- All Implemented Interfaces:
Serializable,Cloneable,QueryModelNode,TupleExpr,VariableScopeChange
public class Service extends UnaryTupleOperator
The SERVICE keyword as defined in SERVICE definition. The service expression is evaluated at the specified service URI. If the service reference is a variable, a value for this variable must be available at evaluation time (e.g. from earlier computations).- Author:
- Andreas Schwarte
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
arg
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Serviceclone()Returns a (deep) clone of this query model node.booleanequals(Object other)Returns true if this query model node and its children are recursively equal to o and its children.StringgetAskQueryString()Returns an ASK query string using no projection vars.StringgetBaseURI()Map<String,String>getPrefixDeclarations()StringgetSelectQueryString(Set<String> projectionVars)Returns a SELECT query string using the provided projection vars.TupleExprgetServiceExpr()StringgetServiceExpressionString()VargetServiceRef()Set<String>getServiceVars()inthashCode()booleanisSilent()voidreplaceChildNode(QueryModelNode current, QueryModelNode replacement)Replaces one of the child nodes with a new node.voidsetBaseURI(String baseURI)voidsetExpressionString(String serviceExpressionString)The SERVICE expression, either complete or just the expression e.g.voidsetPrefixDeclarations(Map<String,String> prefixDeclarations)voidsetServiceRef(Var serviceRef)<X extends Exception>
voidvisit(QueryModelVisitor<X> visitor)Visits this node.<X extends Exception>
voidvisitChildren(QueryModelVisitor<X> visitor)Visits the children of this node.-
Methods inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
getArg, getAssuredBindingNames, getBindingNames, setArg
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Methods inherited from class org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, isCardinalitySet, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, setVariableScopeChange, shouldCacheCardinality, toString
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Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode
getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString
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Method Detail
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getServiceRef
public Var getServiceRef()
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getServiceExpr
public TupleExpr getServiceExpr()
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setServiceRef
public void setServiceRef(Var serviceRef)
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isSilent
public boolean isSilent()
- Returns:
- Returns the silent.
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getPrefixDeclarations
public Map<String,String> getPrefixDeclarations()
- Returns:
- Returns the prefixDeclarations.
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setPrefixDeclarations
public void setPrefixDeclarations(Map<String,String> prefixDeclarations)
- Parameters:
prefixDeclarations- The prefixDeclarations to set.
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setExpressionString
public void setExpressionString(String serviceExpressionString)
The SERVICE expression, either complete or just the expression e.g. "SERVICE{ ... }" becomes " ... " - Parameters:
serviceExpressionString- the inner expression as SPARQL String representation
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getServiceExpressionString
public String getServiceExpressionString()
- Returns:
- Returns the serviceExpressionString.
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getAskQueryString
public String getAskQueryString()
Returns an ASK query string using no projection vars.- Returns:
- an ASK query string
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getSelectQueryString
public String getSelectQueryString(Set<String> projectionVars)
Returns a SELECT query string using the provided projection vars. The variables are inserted into the preparedSelectQueryString in the SELECT clause.- Parameters:
projectionVars-- Returns:
- SELECT query string, utilizing the given projection variables
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visit
public <X extends Exception> void visit(QueryModelVisitor<X> visitor) throws X extends Exception
Description copied from interface:QueryModelNodeVisits this node. The node reports itself to the visitor with the proper runtime type.- Throws:
X extends Exception
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visitChildren
public <X extends Exception> void visitChildren(QueryModelVisitor<X> visitor) throws X extends Exception
Description copied from interface:QueryModelNodeVisits the children of this node. The node callsQueryModelNode.visit(QueryModelVisitor)on all of its child nodes.- Specified by:
visitChildrenin interfaceQueryModelNode- Overrides:
visitChildrenin classUnaryTupleOperator- Throws:
X extends Exception
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replaceChildNode
public void replaceChildNode(QueryModelNode current, QueryModelNode replacement)
Description copied from interface:QueryModelNodeReplaces one of the child nodes with a new node.- Specified by:
replaceChildNodein interfaceQueryModelNode- Overrides:
replaceChildNodein classUnaryTupleOperator- Parameters:
current- The current child node.replacement- The new child node.
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equals
public boolean equals(Object other)
Description copied from interface:QueryModelNodeReturns true if this query model node and its children are recursively equal to o and its children.- Specified by:
equalsin interfaceQueryModelNode- Overrides:
equalsin classUnaryTupleOperator
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hashCode
public int hashCode()
- Overrides:
hashCodein classUnaryTupleOperator
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clone
public Service clone()
Description copied from interface:QueryModelNodeReturns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.- Specified by:
clonein interfaceQueryModelNode- Specified by:
clonein interfaceTupleExpr- Overrides:
clonein classUnaryTupleOperator- Returns:
- A deep clone of this query model node.
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setBaseURI
public void setBaseURI(String baseURI)
- Parameters:
baseURI- The baseURI to set.
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getBaseURI
public String getBaseURI()
- Returns:
- Returns the baseURI.
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