Class DefaultPredicate

private Expr expr

(package private)  DefaultPredicate(Expr expr)

public Object evaluate(Context context)
            throws JaxenException

Evaluates this predicate's expression and returns the result. The result will be a 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.

Specified by:

evaluate in interface Predicate

Parameters:

context - the context in which the expression is evaluated

Returns:

an object representing the result of the evaluation

Throws:

JaxenException -

See Also:

Expr.evaluate(Context)

public Expr getExpr()

Returns the expression in this predicate.

Specified by:

getExpr in interface Predicate

Returns:

the expression between the brackets

public String getText()

Returns the string form of the predicate, including the square brackets.

Specified by:

getText in interface Predicate

Returns:

the bracketed form of this predicate

public void setExpr(Expr expr)

Change the expression used by this predicate.

Specified by:

setExpr in interface Predicate

Parameters:

expr - the new expression

public void simplify()

Simplify the expression in this predicate.

Specified by:

simplify in interface Predicate

See Also:

Expr.simplify()