org.openrdf.sail.federation.algebra

Class AbstractNaryOperator<Expr extends QueryModelNode>

java.lang.Object

org.openrdf.query.algebra.QueryModelNodeBase

org.openrdf.sail.federation.algebra.AbstractNaryOperator<Expr>

All Implemented Interfaces:

Cloneable, QueryModelNode

Direct Known Subclasses:

AbstractNaryTupleOperator

public abstract class AbstractNaryOperator<Expr extends QueryModelNode>
extends QueryModelNodeBase

An abstract superclass for operators which have (zero or more) arguments.

Constructor Summary

Constructors

Constructor and Description
AbstractNaryOperator()
AbstractNaryOperator(Expr... args) Creates a new n-ary operator.
AbstractNaryOperator(List<? extends Expr> args) Creates a new n-ary operator.

Method Summary

Modifier and Type	Method and Description
void	addArg(Expr arg) Sets the arguments of this n-ary operator.
AbstractNaryOperator<Expr>	clone() Returns a (deep) clone of this query model node.
Expr	getArg(int idx) Gets the idx-th argument of this n-ary operator.
List<? extends Expr>	getArgs() Gets the arguments of this n-ary operator.
int	getNumberOfArguments() Gets the number of arguments of this n-ary operator.
boolean	removeArg(Expr arg)
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.
protected void	setArg(int idx, Expr arg) Sets the idx-th argument of this n-ary tuple operator.
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor) Dummy implementation of QueryModelNode.visitChildren(org.openrdf.query.algebra.QueryModelVisitor<X>) 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

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

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

equals, visit

Constructor Detail

AbstractNaryOperator

public AbstractNaryOperator()

AbstractNaryOperator

public AbstractNaryOperator(Expr... args)

Creates a new n-ary operator.

AbstractNaryOperator

public AbstractNaryOperator(List<? extends Expr> args)

Creates a new n-ary operator.

Method Detail

getArgs

public List<? extends Expr> getArgs()

Gets the arguments of this n-ary operator.

Returns:

A copy of the current argument list.

getNumberOfArguments

public int getNumberOfArguments()

Gets the number of arguments of this n-ary operator.

Returns:

The number of arguments.

getArg

public Expr getArg(int idx)

Gets the idx-th argument of this n-ary operator.

Returns:

The operator's arguments.

addArg

public final void addArg(Expr arg)

Sets the arguments of this n-ary operator.

setArg

protected final void setArg(int idx,
                            Expr arg)

Sets the idx-th argument of this n-ary tuple operator.

removeArg

public boolean removeArg(Expr arg)

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<X>) 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 AbstractNaryOperator<Expr> 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

Overrides:

clone in class QueryModelNodeBase

Returns:

A deep clone of this query model node.