org.basex.query.xquery.expr
Class FTExpr
java.lang.Object
org.basex.query.ExprInfo
org.basex.query.xquery.expr.Expr
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
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 java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
expr
public FTExpr[] expr
- Expression list.
FTExpr
public FTExpr(FTExpr... e)
- Constructor.
- Parameters:
e
- expression
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