Package org.basex.query.var

Class Variables

java.lang.Object

org.basex.query.expr.ExprInfo

org.basex.query.var.Variables

All Implemented Interfaces:

Iterable<StaticVar>

public final class Variables
extends ExprInfo
implements Iterable<StaticVar>

Container of global variables of a module.

Author:

BaseX Team 2005-21, BSD License, Leo Woerteler

Constructor Summary

Constructors

Constructor	Description
Variables()

Method Summary

Modifier and Type	Method	Description
void	bindExternal(QueryContext qc, QNmMap<Value> bindings)	Binds all external variables.
void	check()	Checks if all variables were declared and are visible to all their references.
void	checkUp()	Ensures that none of the variable expressions is updating.
StaticVar	declare(Var var, AnnList anns, Expr expr, boolean ext, String doc, VarScope vs)	Declares a new static variable.
Iterator<StaticVar>	iterator()
org.basex.query.var.StaticVarRef	newRef(QNm name, StaticContext sc, InputInfo ii)	Returns a new reference to the (possibly not yet declared) variable with the given name.
void	plan(QueryPlan plan)	Creates a query plan.
void	plan(QueryString qs)	Creates a query string.

Methods inherited from class org.basex.query.expr.ExprInfo

description, toErrorString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

Variables

public Variables()

Method Details

declare

public StaticVar declare(Var var,
 AnnList anns,
 Expr expr,
 boolean ext,
 String doc,
 VarScope vs)
                  throws QueryException

Declares a new static variable.

Parameters:

var - variable

anns - annotations

expr - bound expression, possibly null

ext - external flag

doc - xqdoc string

vs - variable scope

Returns:

static variable reference

Throws:

QueryException - query exception

checkUp

public void checkUp()
             throws QueryException

Ensures that none of the variable expressions is updating.

Throws:

QueryException - query exception

check

public void check()
           throws QueryException

Checks if all variables were declared and are visible to all their references.

Throws:

QueryException - query exception

newRef

public org.basex.query.var.StaticVarRef newRef(QNm name,
 StaticContext sc,
 InputInfo ii)
                                        throws QueryException

Returns a new reference to the (possibly not yet declared) variable with the given name.

Parameters:

ii - input info

name - variable name

sc - static context

Returns:

reference

Throws:

QueryException - if the variable is not visible

bindExternal

public void bindExternal(QueryContext qc,
 QNmMap<Value> bindings)
                  throws QueryException

Binds all external variables.

Parameters:

qc - query context

bindings - variable bindings

Throws:

QueryException - query exception

iterator

public Iterator<StaticVar> iterator()

Specified by:

iterator in interface Iterable<StaticVar>

plan

public void plan(QueryPlan plan)

Description copied from class: ExprInfo

Creates a query plan.

Specified by:

plan in class ExprInfo

Parameters:

plan - expression plan

plan

public void plan(QueryString qs)

Description copied from class: ExprInfo

Creates a query string.

Specified by:

plan in class ExprInfo

Parameters:

qs - query string builder