Package org.eclipse.rdf4j.query.algebra

Class If

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.If

All Implemented Interfaces:

Serializable, Cloneable, GraphPatternGroupable, QueryModelNode, ValueExpr, VariableScopeChange

public class If
extends AbstractQueryModelNode
implements ValueExpr

The IF function, as defined in SPARQL 1.1 Query.

Author:

Jeen Broekstra

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
If()
If(ValueExpr condition)
If(ValueExpr condition, ValueExpr result)
If(ValueExpr condition, ValueExpr result, ValueExpr alternative)

Method Summary

Modifier and Type	Method	Description
If	clone()	Returns a (deep) clone of this query model node.
boolean	equals(Object other)	Returns true if this query model node and its children are recursively equal to o and its children.
ValueExpr	getAlternative()
ValueExpr	getCondition()	Gets the argument of this unary value operator.
ValueExpr	getResult()
int	hashCode()
void	replaceChildNode(QueryModelNode current, QueryModelNode replacement)	Default implementation of QueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this node.
void	setAlternative(ValueExpr alternative)
void	setCondition(ValueExpr condition)	Sets the condition argument of this unary value operator.
void	setResult(ValueExpr result)
<X extends Exception> void	visit(QueryModelVisitor<X> visitor)	Visits this node.
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor)	Dummy implementation of QueryModelNode.visitChildren(org.eclipse.rdf4j.query.algebra.QueryModelVisitor<X>) that does nothing.

Methods inherited from class org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, isCardinalitySet, isGraphPatternGroup, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setGraphPatternGroup, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, setVariableScopeChange, shouldCacheCardinality, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode

getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString

Constructor Details

If

public If()

If

public If(ValueExpr condition)

If

public If(ValueExpr condition,
 ValueExpr result)

If

public If(ValueExpr condition,
 ValueExpr result,
 ValueExpr alternative)

Method Details

getCondition

public ValueExpr getCondition()

Gets the argument of this unary value operator.

Returns:

The operator's argument.

setCondition

public void setCondition(ValueExpr condition)

Sets the condition argument of this unary value operator.

Parameters:

condition - The (new) condition argument for this operator, must not be null.

visit

public <X extends Exception> void visit(QueryModelVisitor<X> visitor)
                                 throws X

Description copied from interface: QueryModelNode

Visits this node. The node reports itself to the visitor with the proper runtime type.

Specified by:

visit in interface QueryModelNode

Throws:

X extends Exception

visitChildren

public <X extends Exception> void visitChildren(QueryModelVisitor<X> visitor)
                                         throws X

Description copied from class: AbstractQueryModelNode

Dummy implementation of QueryModelNode.visitChildren(org.eclipse.rdf4j.query.algebra.QueryModelVisitor<X>) that does nothing. Subclasses should override this method when they have child nodes.

Specified by:

visitChildren in interface QueryModelNode

Overrides:

visitChildren in class AbstractQueryModelNode

Throws:

X extends Exception

replaceChildNode

public void replaceChildNode(QueryModelNode current,
 QueryModelNode replacement)

Description copied from class: AbstractQueryModelNode

Default implementation of QueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this node.

Specified by:

replaceChildNode in interface QueryModelNode

Overrides:

replaceChildNode in class AbstractQueryModelNode

Parameters:

current - The current child node.

replacement - The new child node.

equals

public boolean equals(Object other)

Description copied from interface: QueryModelNode

Returns true if this query model node and its children are recursively equal to o and its children.

Specified by:

equals in interface QueryModelNode

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

clone

public If clone()

Description copied from interface: QueryModelNode

Returns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.

Specified by:

clone in interface QueryModelNode

Specified by:

clone in interface ValueExpr

Overrides:

clone in class AbstractQueryModelNode

Returns:

A deep clone of this query model node.

setResult

public void setResult(ValueExpr result)

Parameters:

result - The result to set.

getResult

public ValueExpr getResult()

Returns:

Returns the result.

setAlternative

public void setAlternative(ValueExpr alternative)

Parameters:

alternative - The alternative to set.

getAlternative

public ValueExpr getAlternative()

Returns:

Returns the alternative.