Interface IXQuery

Unit

xquery

Declaration

type IXQuery = interface(IInterface)

Description

Interface for an XPath/XQuery query.

Reference counted. Call evaluate to evaluate it.

Hierarchy

• IInterface
• IXQuery

Overview

Methods

	function evaluate(const tree: TTreeNode = nil): IXQValue;
	function evaluate(var context: TXQEvaluationContext): IXQValue;
	function evaluate(const contextItem: IXQValue): IXQValue;
	function getTerm: TXQTerm;
	procedure setTerm(aterm: TXQTerm);
	function clone: IXQuery;
	function visit(visitor: TXQTerm_VisitorClass; parent: TXQTerm = nil): TXQTerm_VisitAction;
	function visit(visitor: TXQTerm_Visitor; parent: TXQTerm = nil): TXQTerm_VisitAction;

Properties

property Term: TXQTerm read getTerm write setTerm;

Description

Methods

	function evaluate(const tree: TTreeNode = nil): IXQValue;
Evaluates the query with a certain root element (i.e. / will return tree)

	function evaluate(var context: TXQEvaluationContext): IXQValue;
Evaluates the query with a certain evaluation context

	function evaluate(const contextItem: IXQValue): IXQValue;
Evaluates the query with (i.e. . will return contextItem. If it is a node / will return the root of it)

	function getTerm: TXQTerm;

	procedure setTerm(aterm: TXQTerm);

	function clone: IXQuery;

	function visit(visitor: TXQTerm_VisitorClass; parent: TXQTerm = nil): TXQTerm_VisitAction;

	function visit(visitor: TXQTerm_Visitor; parent: TXQTerm = nil): TXQTerm_VisitAction;

Properties

	property Term: TXQTerm read getTerm write setTerm;
The AST of the query