Package org.eclipse.rdf4j.query.algebra

Class Var

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.Var

All Implemented Interfaces:

Serializable, Cloneable, QueryModelNode, ValueExpr, VariableScopeChange

public class Var
extends AbstractQueryModelNode
implements ValueExpr

A variable that can contain a Value.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Var(String name)
Var(String name, boolean anonymous)
Var(String name, Value value)
Var(String name, Value value, boolean anonymous)
Var(String name, Value value, boolean anonymous, boolean constant)

Method Summary

Modifier and Type	Method	Description
Var	clone()	Returns a (deep) clone of this query model node.
boolean	equals(Object o)	Returns true if this query model node and its children are recursively equal to o and its children.
String	getName()
String	getSignature()	Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.
Value	getValue()
int	hashCode()
boolean	hasValue()
boolean	isAnonymous()
boolean	isConstant()
void	replaceChildNode(QueryModelNode current, QueryModelNode replacement)	Replaces one of the child nodes with a new node.
void	setParentNode(QueryModelNode parent)	Sets the node's parent.
<X extends Exception> void	visit(QueryModelVisitor<X> visitor)	Visits this node.
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor)	Visits the children of this node.

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

getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getTotalTimeNanosActual, isCardinalitySet, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, 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, getTotalTimeNanosActual, replaceWith, setCostEstimate, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString

Constructor Details

Var

public Var(String name,
 Value value,
 boolean anonymous,
 boolean constant)

Var

public Var(String name)

Var

public Var(String name,
 boolean anonymous)

Var

public Var(String name,
 Value value)

Var

public Var(String name,
 Value value,
 boolean anonymous)

Method Details

isAnonymous

public boolean isAnonymous()

getName

public String getName()

hasValue

public boolean hasValue()

getValue

public Value getValue()

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

visitChildren

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

Description copied from interface: QueryModelNode

Visits the children of this node. The node calls QueryModelNode.visit(QueryModelVisitor) on all of its child nodes.

Specified by:

visitChildren in interface QueryModelNode

Throws:

X

setParentNode

public void setParentNode(QueryModelNode parent)

Description copied from interface: QueryModelNode

Sets the node's parent.

Specified by:

setParentNode in interface QueryModelNode

Overrides:

setParentNode in class AbstractQueryModelNode

Parameters:

parent - The parent node for this node.

replaceChildNode

public void replaceChildNode(QueryModelNode current,
 QueryModelNode replacement)

Description copied from interface: QueryModelNode

Replaces one of the child nodes with a new node.

Specified by:

replaceChildNode in interface QueryModelNode

Parameters:

current - The current child node.

replacement - The new child node.

getSignature

public String getSignature()

Description copied from class: AbstractQueryModelNode

Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.

Specified by:

getSignature in interface QueryModelNode

Overrides:

getSignature in class AbstractQueryModelNode

Returns:

The node's signature, e.g. SLICE (offset=10, limit=10).

equals

public boolean equals(Object o)

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 Var 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.

isConstant

public boolean isConstant()

Returns:

Returns the constant.