org.basex.query.expr
Class CPI
java.lang.Object
org.basex.query.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.Arr
org.basex.query.expr.CFrag
org.basex.query.expr.CPI
public final class CPI
- extends CFrag
PI fragment.
- Author:
- Workgroup DBIS, University of Konstanz 2005-10, ISC License, Christian Gruen
Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
Expr.Use |
Fields inherited from class org.basex.query.expr.Arr |
expr |
Methods inherited from class org.basex.query.expr.Expr |
addText, checkCtx, checkDbl, checkItr, e, ebv, i, indexAccessible, iter, sameAs, size, test, v |
CPI
public CPI(Expr n,
Expr v)
- Constructor.
- Parameters:
n
- namev
- value
comp
public Expr comp(QueryContext ctx)
throws QueryException
- Description copied from class:
Expr
- Optimizes and compiles the expression.
- Overrides:
comp
in class Arr
- Parameters:
ctx
- query context
- Returns:
- optimized Expression
- Throws:
QueryException
- query exception
atomic
public FPI atomic(QueryContext ctx)
throws QueryException
- Description copied from class:
Expr
- Evaluates the expression and returns the resulting item or
a
null
reference.
If this method is not overwritten, Expr.iter(org.basex.query.QueryContext)
must be implemented.
- Specified by:
atomic
in class CFrag
- Parameters:
ctx
- query context
- Returns:
- iterator
- Throws:
QueryException
- query exception
check
public static byte[] check(byte[] atom)
throws QueryException
- Checks the specified token for validity.
- Parameters:
atom
- token to be checked
- Returns:
- token
- Throws:
QueryException
- query exception
info
public String info()
- Description copied from class:
ExprInfo
- Returns a string description of the expression. Contrary to the
ExprInfo.toString()
method, arguments are not included
in the output.
- Overrides:
info
in class ExprInfo
- Returns:
- result of check
toString
public String toString()
- Specified by:
toString
in class ExprInfo