org.basex.query.xquery.expr
Class Arr

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xquery.expr.Expr
          extended by 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