lux.xquery
Class FLWOR

java.lang.Object
  lux.xpath.AbstractExpression
      lux.xquery.FLWOR

All Implemented Interfaces:

Visitable

public class FLWOR
extends AbstractExpression

Nested Class Summary

Nested classes/interfaces inherited from class lux.xpath.AbstractExpression

AbstractExpression.Type

Field Summary

Fields inherited from class lux.xpath.AbstractExpression

subs, sup

Constructor Summary

FLWOR(AbstractExpression returnExpression, FLWORClause... clauses)

Method Summary

AbstractExpression	accept(ExpressionVisitor visitor)
FLWORClause[]	getClauses()
AbstractExpression	getLastContextStep() This method is called by the optimizer in order to determine an element or attribute QName (or wildcard) against which some expression is being compared, in order to generate an appropriate text query.
int	getPrecedence()
AbstractExpression	getReturnExpression()
AbstractExpression	getRoot()
AbstractExpression	replaceRoot(AbstractExpression replacement) If this has absolute subexpressions, replace them with the replacement expression (see Root.replaceRoot(AbstractExpression)
void	toString(StringBuilder buf) Each subclass must implement the toString(StringBuilder) method by rendering itself as a syntatically valid XPath/XQuery expression in the given buffer.

Methods inherited from class lux.xpath.AbstractExpression

acceptSubs, appendSub, getBindingContext, getSubs, getSuper, getTail, getType, isAbsolute, isDocumentOrdered, setSubs, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FLWOR

public FLWOR(AbstractExpression returnExpression,
             FLWORClause... clauses)

Method Detail

accept

public AbstractExpression accept(ExpressionVisitor visitor)

toString

public void toString(StringBuilder buf)

Description copied from class: AbstractExpression

Each subclass must implement the toString(StringBuilder) method by rendering itself as a syntatically valid XPath/XQuery expression in the given buffer.

Specified by:

toString in class AbstractExpression

getReturnExpression

public AbstractExpression getReturnExpression()

getClauses

public FLWORClause[] getClauses()

replaceRoot

public AbstractExpression replaceRoot(AbstractExpression replacement)

Description copied from class: AbstractExpression

If this has absolute subexpressions, replace them with the replacement expression (see Root.replaceRoot(AbstractExpression)

Overrides:

replaceRoot in class AbstractExpression

Parameters:

replacement - the expression to use in place of '/'

Returns:

this

getRoot

public AbstractExpression getRoot()

Overrides:

getRoot in class AbstractExpression

Returns:

the root of this expression: this will either be a Root(/), a function returning document nodes, or null.

getPrecedence

public int getPrecedence()

Specified by:

getPrecedence in class AbstractExpression

Returns:

a number indicating the *outer* precedence of this expression. Expressions with lower precedence numbers have lower precedence, ie bind more loosely, than expressions with higher precedence. Expressions with no sub-expressions are assigned a high precedence. Complex expressions can be seen as having an inner and an outer precedence; for example function call expressions behave as a comma with regard to their sub-expressions, the arguments, and like parentheses to their enclosing expression.

getLastContextStep

public AbstractExpression getLastContextStep()

Description copied from class: AbstractExpression

This method is called by the optimizer in order to determine an element or attribute QName (or wildcard) against which some expression is being compared, in order to generate an appropriate text query.

Overrides:

getLastContextStep in class AbstractExpression

Returns:

the last context step of the return expression.