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java.lang.Objectorg.basex.query.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.Simple
org.basex.query.expr.Pos
public final class Pos
Pos expression.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
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Expr.Use |
Method Summary | |
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Bln |
atomic(QueryContext ctx)
Evaluates the expression and returns the resulting item or a null reference. |
boolean |
last(QueryContext ctx)
Returns false if no more results can be expected. |
void |
plan(Serializer ser)
Recursively sends the abstract syntax of this expression to the specified serializer. |
Return |
returned(QueryContext ctx)
Indicates the return type of an expression. |
String |
toString()
|
boolean |
uses(Expr.Use u,
QueryContext ctx)
Indicates if an expression uses the specified type. |
Methods inherited from class org.basex.query.expr.Simple |
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color, comp |
Methods inherited from class org.basex.query.expr.Expr |
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addText, checkCtx, checkDbl, checkItr, duplicates, e, ebv, i, indexAccessible, indexEquivalent, iter, removable, remove, sameAs, size, test, v |
Methods inherited from class org.basex.query.ExprInfo |
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info, name |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Method Detail |
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public Bln atomic(QueryContext ctx) throws QueryException
Expr
null
reference.
If this method is not overwritten, Expr.iter(org.basex.query.QueryContext)
must be implemented.
atomic
in class Expr
ctx
- query context
QueryException
- query exceptionpublic boolean last(QueryContext ctx)
ctx
- query context
public boolean uses(Expr.Use u, QueryContext ctx)
Expr
true
is returned by default and thus assumed as "worst-case".
uses
in class Simple
u
- use type to be checkedctx
- query context
public Return returned(QueryContext ctx)
Expr
returned
in class Expr
ctx
- query context
public String toString()
toString
in class ExprInfo
public void plan(Serializer ser) throws IOException
ExprInfo
plan
in class Simple
ser
- serializer
IOException
- I/O exception
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