org.basex.query.xquery.expr
Class Case

java.lang.Object
  org.basex.query.xquery.expr.Expr
      org.basex.query.xquery.expr.Case

public final class Case
extends Expr

Case expression.

Author:

Workgroup DBIS, University of Konstanz 2005-07, ISC License, Christian Gruen

Field Summary

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

type

Constructor Summary

Case(Var v, Expr r)
Constructor.

Method Summary

Expr	comp(XQContext ctx) Optimizes and compiles the expression tree.
Item	e(XQContext ctx, Item item) Evaluates the given item.
Item	eval(XQContext ctx) Evaluates the expression and returns the resulting item.
java.lang.String	info() Returns a string description of the expression.
java.lang.String	toString()

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

cls, d, e, i, n, node, s, size, str, u

Methods inherited from class java.lang.Object

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

Constructor Detail

Case

public Case(Var v,
            Expr r)

Constructor.

Parameters:

v - variable

r - return expression

Method Detail

comp

public Expr comp(XQContext ctx)

Description copied from class: Expr

Optimizes and compiles the expression tree.

Specified by:

comp in class Expr

Parameters:

ctx - query context

Returns:

optimized Expression

e

public Item e(XQContext ctx,
              Item item)
       throws XQException

Evaluates the given item.

Parameters:

ctx - query context

item - item to be checked

Returns:

resulting item

Throws:

XQException - evaluation exception

eval

public Item eval(XQContext ctx)

Description copied from class: Expr

Evaluates the expression and returns the resulting item.

Specified by:

eval in class Expr

Parameters:

ctx - query context

Returns:

resulting item

info

public java.lang.String info()

Description copied from class: Expr

Returns a string description of the expression. Contrary to the Expr.toString() method, the current expressions aren't included in the output.

Specified by:

info in class Expr

Returns:

result of check

toString

public java.lang.String toString()

Specified by:

toString in class Expr