org.eclipse.rdf4j.query.algebra

Class AbstractQueryModelNode

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

All Implemented Interfaces:

Serializable, Cloneable, GraphPatternGroupable, QueryModelNode

Direct Known Subclasses:

AbstractNaryOperator, Add, ArbitraryLengthPath, BinaryTupleOperator, BinaryValueOperator, BindingSetAssignment, BNodeGenerator, Bound, Clear, Copy, Create, DeleteData, EmptySet, ExtensionElem, ExternalSet, FunctionCall, GroupElem, If, InsertData, Load, Modify, Move, NAryValueOperator, OrderElem, ProjectionElem, ProjectionElemList, QueryModelNodeBase, SingletonSet, StatementPattern, SubQueryValueOperator, UnaryTupleOperator, UnaryValueOperator, ValueConstant, Var, ZeroLengthPath

public abstract class AbstractQueryModelNode
extends Object
implements QueryModelNode, GraphPatternGroupable

Base implementation of QueryModelNode.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AbstractQueryModelNode()

Method Summary

Modifier and Type	Method and Description
AbstractQueryModelNode	clone() Returns a (deep) clone of this query model node.
QueryModelNode	getParentNode() Gets the node's parent.
String	getSignature() Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.
boolean	isGraphPatternGroup() indicates if the node represents the root of a graph pattern group.
protected boolean	nullEquals(Object o1, Object o2)
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 <T extends QueryModelNode> boolean	replaceNodeInList(List<T> list, QueryModelNode current, QueryModelNode replacement)
void	replaceWith(QueryModelNode replacement) Default implementation of QueryModelNode.replaceWith(QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this node.
void	setGraphPatternGroup(boolean isGraphPatternGroup) Set the value of GraphPatternGroupable.isGraphPatternGroup() to true or false.
void	setParentNode(QueryModelNode parent) Sets the node's parent.
String	toString() Returns an indented print of the node tree, starting from this node.
<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 java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode

equals, visit

Constructor Detail

AbstractQueryModelNode

public AbstractQueryModelNode()

Method Detail

getParentNode

public QueryModelNode getParentNode()

Description copied from interface: QueryModelNode

Gets the node's parent.

Specified by:

getParentNode in interface QueryModelNode

Returns:

The parent node, if any.

setParentNode

public void setParentNode(QueryModelNode parent)

Description copied from interface: QueryModelNode

Sets the node's parent.

Specified by:

setParentNode in interface QueryModelNode

Parameters:

parent - The parent node for this node.

isGraphPatternGroup

public boolean isGraphPatternGroup()

Description copied from interface: GraphPatternGroupable

indicates if the node represents the root of a graph pattern group.

Specified by:

isGraphPatternGroup in interface GraphPatternGroupable

Returns:

true iff the node represents the node of a graph pattern group.

setGraphPatternGroup

public void setGraphPatternGroup(boolean isGraphPatternGroup)

Description copied from interface: GraphPatternGroupable

Set the value of GraphPatternGroupable.isGraphPatternGroup() to true or false.

Specified by:

setGraphPatternGroup in interface GraphPatternGroupable

visitChildren

public <X extends Exception> void visitChildren(QueryModelVisitor<X> visitor)
                                         throws X extends Exception

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

Throws:

X extends Exception

replaceChildNode

public 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.

Specified by:

replaceChildNode in interface QueryModelNode

Parameters:

current - The current child node.

replacement - The new child node.

replaceWith

public void replaceWith(QueryModelNode replacement)

Default implementation of QueryModelNode.replaceWith(QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this node.

Specified by:

replaceWith in interface QueryModelNode

Parameters:

replacement - The new node.

getSignature

public String getSignature()

Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.

Specified by:

getSignature in interface QueryModelNode

Returns:

The node's signature, e.g. SLICE (offset=10, limit=10).

toString

public String toString()

Description copied from interface: QueryModelNode

Returns an indented print of the node tree, starting from this node.

Specified by:

toString in interface QueryModelNode

Overrides:

toString in class Object

clone

public AbstractQueryModelNode 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 Object

Returns:

A deep clone of this query model node.

replaceNodeInList

protected <T extends QueryModelNode> boolean replaceNodeInList(List<T> list,
                                                               QueryModelNode current,
                                                               QueryModelNode replacement)

nullEquals

protected boolean nullEquals(Object o1,
                             Object o2)