org.basex.query.xquery.expr
Class Arr

java.lang.Object
  org.basex.query.ExprInfo
      org.basex.query.xquery.expr.Expr
          org.basex.query.xquery.expr.Arr

Direct Known Subclasses:

And, CAttr, CElem, Clc, CmpG, CmpN, CmpV, CPI, Except, FTContains, FunCall, FunJava, If, InterSect, List, Or, Path, Pred, Range, Step, Try, Union

public abstract class Arr
extends Expr

Abstract array expression.

Author:

Workgroup DBIS, University of Konstanz 2005-08, ISC License, Christian Gruen

Nested Class Summary

Nested classes/interfaces inherited from class org.basex.query.xquery.expr.Expr

Expr.Return, Expr.Using

Field Summary

Expr[]

expr Expression list.

Method Summary

Expr	comp(XQContext ctx) Optimizes and compiles the expression.
void	plan(Serializer ser) Recursively sends the abstract syntax of this expression to the specified serializer.
Type	returned() Indicates if an expression returns the specified type.
boolean	uses(Expr.Using u) Indicates if an expression uses the specified type.

Methods inherited from class org.basex.query.xquery.expr.Expr

e, i, iter

Methods inherited from class org.basex.query.ExprInfo

color, info, name, toString

Methods inherited from class java.lang.Object

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

Field Detail

expr

public Expr[] expr

Expression list.

Method Detail

comp

public Expr comp(XQContext ctx)
          throws XQException

Description copied from class: Expr

Optimizes and compiles the expression.

Specified by:

comp in class Expr

Parameters:

ctx - query context

Returns:

optimized Expression

Throws:

XQException - evaluation exception

uses

public boolean uses(Expr.Using u)

Description copied from class: Expr

Indicates if an expression uses the specified type. Called by the compiler to check if expressions can be reformulated. true is returned by default.

Overrides:

uses in class Expr

Parameters:

u - using flag

Returns:

result of check

returned

public Type returned()

Description copied from class: Expr

Indicates if an expression returns the specified type. Called by the compiler to check if expressions can be reformulated. null is returned by default.

Overrides:

returned in class Expr

Returns:

result of check

plan

public void plan(Serializer ser)
          throws java.io.IOException

Description copied from class: ExprInfo

Recursively sends the abstract syntax of this expression to the specified serializer.

Specified by:

plan in class ExprInfo

Parameters:

ser - serializer

Throws:

java.io.IOException - exception