org.basex.query.xquery.expr
Class FTExpr

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xquery.expr.Expr
          extended by org.basex.query.xquery.expr.FTExpr
Direct Known Subclasses:
FTAnd, FTMildNot, FTNot, FTOptions, FTOr, FTSelect, FTWords

public abstract class FTExpr
extends Expr

This class defines is an abstract class for full-text expressions.

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
 FTExpr[] expr
          Expression list.
 
Constructor Summary
FTExpr(FTExpr... e)
          Constructor.
 
Method Summary
 FTExpr comp(XQContext ctx)
          Optimizes and compiles the expression.
 void plan(Serializer ser)
          Recursively sends the abstract syntax of this expression to the specified serializer.
 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, returned
 
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 FTExpr[] expr
Expression list.

Constructor Detail

FTExpr

public FTExpr(FTExpr... e)
Constructor.

Parameters:
e - expression
Method Detail

comp

public FTExpr 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 final 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

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