org.basex.query.xpath.func
Class Nodes

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xpath.expr.Expr
          extended by org.basex.query.xpath.func.Func
              extended by org.basex.query.xpath.func.Nodes

public final class Nodes
extends Func

Constructor for implementation specific nodes() function; returns a node set with the pre nodes specified in the argument literal.

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

Field Summary
static java.lang.String NAME
          Name of function.
 
Fields inherited from class org.basex.query.xpath.func.Func
desc
 
Constructor Summary
Nodes(Expr[] arg)
          Function Constructor.
 
Method Summary
 boolean checkArguments()
          Checks validity/number of arguments.
 Nod eval(XPContext ctx)
          Evaluates the expression with the specified context set.
 
Methods inherited from class org.basex.query.xpath.func.Func
comp, evalArgs, plan, toString, usesPos, usesSize
 
Methods inherited from class org.basex.query.xpath.expr.Expr
indexEquivalent, indexSizes, returnedValue, sameAs
 
Methods inherited from class org.basex.query.ExprInfo
color, info, name
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

NAME

public static final java.lang.String NAME
Name of function.

Constructor Detail

Nodes

public Nodes(Expr[] arg)
Function Constructor.

Parameters:
arg - expression array
Method Detail

eval

public Nod eval(XPContext ctx)
         throws QueryException
Description copied from class: Expr
Evaluates the expression with the specified context set. Additionally provides a context

Specified by:
eval in class Expr
Parameters:
ctx - query context
Returns:
resulting XPathValue
Throws:
QueryException - evaluation exception

checkArguments

public boolean checkArguments()
Description copied from class: Func
Checks validity/number of arguments.

Specified by:
checkArguments in class Func
Returns:
result of comparison