org.openrdf.query.algebra
Class BinaryTupleOperator

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

All Implemented Interfaces:

Cloneable, QueryModelNode, TupleExpr

Direct Known Subclasses:

Difference, Intersection, Join, LeftJoin, Union

public abstract class BinaryTupleOperator
extends QueryModelNodeBase
implements TupleExpr

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

Field Summary

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

Constructor Summary

BinaryTupleOperator()

BinaryTupleOperator(TupleExpr leftArg, TupleExpr rightArg)
Creates a new binary tuple operator.

Method Summary

BinaryTupleOperator	clone() Returns a (deep) clone of this query model node.
TupleExpr	getLeftArg() Gets the left argument of this binary tuple operator.
TupleExpr	getRightArg() Gets the right argument of this binary tuple operator.
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(TupleExpr leftArg) Sets the left argument of this binary tuple operator.
void	setRightArg(TupleExpr rightArg) Sets the right argument of this binary tuple 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, replaceWith, setParentNode, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

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

getBindingNames

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

getParentNode, getSignature, replaceWith, setParentNode, toString, visit

Field Detail

leftArg

protected TupleExpr leftArg

The operator's left argument.

rightArg

protected TupleExpr rightArg

The operator's right argument.

Constructor Detail

BinaryTupleOperator

public BinaryTupleOperator()

BinaryTupleOperator

public BinaryTupleOperator(TupleExpr leftArg,
                           TupleExpr rightArg)

Creates a new binary tuple 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 TupleExpr getLeftArg()

Gets the left argument of this binary tuple operator.

Returns:

The operator's left argument.

setLeftArg

public void setLeftArg(TupleExpr leftArg)

Sets the left argument of this binary tuple operator.

Parameters:

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

getRightArg

public TupleExpr getRightArg()

Gets the right argument of this binary tuple operator.

Returns:

The operator's right argument.

setRightArg

public void setRightArg(TupleExpr rightArg)

Sets the right argument of this binary tuple 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.

clone

public BinaryTupleOperator 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 TupleExpr

Overrides:

clone in class QueryModelNodeBase

Returns:

A deep clone of this query model node.