org.openrdf.query.algebra
Class UnaryTupleOperator

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

All Implemented Interfaces:

Cloneable, QueryModelNode, TupleExpr

Direct Known Subclasses:

Distinct, Extension, Filter, Group, MultiProjection, Order, Projection, QueryRoot, Slice

public abstract class UnaryTupleOperator
extends QueryModelNodeBase
implements TupleExpr

An abstract superclass for unary tuple operators which, by definition, has one argument.

Field Summary

protected TupleExpr

arg The operator's argument.

Constructor Summary

UnaryTupleOperator()

UnaryTupleOperator(TupleExpr arg)
Creates a new unary tuple operator.

Method Summary

UnaryTupleOperator	clone() Returns a (deep) clone of this query model node.
TupleExpr	getArg() Gets the argument of this unary tuple operator.
Set<String>	getBindingNames() Gets the names of the bindings that are returned by this tuple expression when it is evaluated.
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	setArg(TupleExpr arg) Sets the argument of this unary 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.QueryModelNode

getParentNode, getSignature, replaceWith, setParentNode, toString, visit

Field Detail

arg

protected TupleExpr arg

The operator's argument.

Constructor Detail

UnaryTupleOperator

public UnaryTupleOperator()

UnaryTupleOperator

public UnaryTupleOperator(TupleExpr arg)

Creates a new unary tuple operator.

Parameters:

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

Method Detail

getArg

public TupleExpr getArg()

Gets the argument of this unary tuple operator.

Returns:

The operator's argument.

setArg

public void setArg(TupleExpr arg)

Sets the argument of this unary tuple operator.

Parameters:

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

getBindingNames

public Set<String> getBindingNames()

Description copied from interface: TupleExpr

Gets the names of the bindings that are returned by this tuple expression when it is evaluated.

Specified by:

getBindingNames in interface TupleExpr

Returns:

A set of binding names.

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 UnaryTupleOperator 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.