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Represents an XPath predicate such as [position() = last()]
.
This is production 8 and 9 in the
XPath 1.0 specification:
[8] Predicate ::= '[' PredicateExpr ']' [9] PredicateExpr ::= Expr
Method Summary | |
java.lang.Object |
evaluate(Context context)
Evaluates this predicate's expression and returns the result. |
Expr |
getExpr()
Returns the expression in this predicate. |
java.lang.String |
getText()
Returns the string form of the predicate, including the square brackets. |
void |
setExpr(Expr expr)
Change the expression used by this predicate. |
void |
simplify()
Simplify the expression in this predicate. |
Method Detail |
public Expr getExpr()
public void setExpr(Expr expr)
public void simplify()
Expr.simplify()
public java.lang.String getText()
public java.lang.Object evaluate(Context context) throws JaxenException
java.lang.Double
for expressions that
return a number, a java.lang.String
for expressions that
return a string, a java.lang.Boolean
for expressions that
return a boolean, and a java.util.List
for expressions that
return a node-set. In the latter case, the elements of the list are
the actual objects from the source document model. Copies are not made.
context
- the context in which the expression is evaluated
JaxenException
Expr.evaluate(Context)
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