org.openrdf.query.algebra
Class BinaryValueOperator

java.lang.Object
  org.openrdf.query.algebra.QueryModelNodeBase
      org.openrdf.query.algebra.BinaryValueOperator

All Implemented Interfaces:

Cloneable, QueryModelNode, ValueExpr

Direct Known Subclasses:

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

public abstract class BinaryValueOperator
extends QueryModelNodeBase
implements ValueExpr

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

Field Summary

protected ValueExpr	leftArg The operator's left argument.
protected ValueExpr	rightArg The operator's right argument.

Constructor Summary

BinaryValueOperator()

BinaryValueOperator(ValueExpr leftArg, ValueExpr rightArg)
Creates a new binary value operator.

Method Summary

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.openrdf.query.algebra.QueryModelVisitor) that does nothing.

Methods inherited from class org.openrdf.query.algebra.QueryModelNodeBase

getParentNode, getSignature, nullEquals, replaceNodeInList, replaceWith, setParentNode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.query.algebra.QueryModelNode

getParentNode, getSignature, replaceWith, setParentNode, toString, visit

Field Detail

leftArg

protected ValueExpr leftArg

The operator's left argument.

rightArg

protected ValueExpr rightArg

The operator's right argument.

Constructor Detail

BinaryValueOperator

public BinaryValueOperator()

BinaryValueOperator

public 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 Detail

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 extends Exception

Description copied from class: QueryModelNodeBase

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

Specified by:

visitChildren in interface QueryModelNode

Overrides:

visitChildren in class QueryModelNodeBase

Throws:

X extends Exception

replaceChildNode

public void replaceChildNode(QueryModelNode current,
                             QueryModelNode replacement)

Description copied from class: QueryModelNodeBase

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 QueryModelNodeBase

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 QueryModelNodeBase

Returns:

A deep clone of this query model node.