Package org.eclipse.rdf4j.query.algebra

Class BinaryValueOperator

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.BinaryValueOperator

All Implemented Interfaces:

Serializable, Cloneable, GraphPatternGroupable, QueryModelNode, ValueExpr, VariableScopeChange

Direct Known Subclasses:

And, Compare, LangMatches, MathExpr, Or, Regex, SameTerm

public abstract class BinaryValueOperator
extends AbstractQueryModelNode
implements ValueExpr

An abstract superclass for binary value operators which, by definition, has two arguments.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected ValueExpr	leftArg	The operator's left argument.
protected ValueExpr	rightArg	The operator's right argument.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BinaryValueOperator()
protected	BinaryValueOperator(ValueExpr leftArg, ValueExpr rightArg)	Creates a new binary value operator.

Method Summary

Modifier and Type	Method	Description
BinaryValueOperator	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	getLeftArg()	Gets the left argument of this binary value operator.
ValueExpr	getRightArg()	Gets the right argument of this binary value operator.
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	setLeftArg(ValueExpr leftArg)	Sets the left argument of this binary value operator.
void	setRightArg(ValueExpr rightArg)	Sets the right argument of this binary value operator.
<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, visit

Field Details

leftArg

protected ValueExpr leftArg

The operator's left argument.

rightArg

protected ValueExpr rightArg

The operator's right argument.

Constructor Details

BinaryValueOperator

protected BinaryValueOperator()

BinaryValueOperator

protected BinaryValueOperator(ValueExpr leftArg,
 ValueExpr rightArg)

Creates a new binary value operator.

Parameters:

leftArg - The operator's left argument, must not be null.

rightArg - The operator's right argument, must not be null.

Method Details

getLeftArg

public ValueExpr getLeftArg()

Gets the left argument of this binary value operator.

Returns:

The operator's left argument.

setLeftArg

public void setLeftArg(ValueExpr leftArg)

Sets the left argument of this binary value operator.

Parameters:

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

getRightArg

public ValueExpr getRightArg()

Gets the right argument of this binary value operator.

Returns:

The operator's right argument.

setRightArg

public void setRightArg(ValueExpr rightArg)

Sets the right argument of this binary value operator.

Parameters:

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

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 BinaryValueOperator 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.