Expr

Interface Expr

public interface Expr extends Serializable

Represents an XPath expression. This is production 14 in the XPath 1.0 specification:

[14]      Expr       ::=      OrExpr

Method Summary
Object	evaluate(Context context) Evaluate the expression in the given context, and return the result.
String	getText() Returns a String containing the XPath expression.
Expr	simplify() Simplifies the XPath expression.

Method Summary

Object

evaluate(Context context)

Evaluate the expression in the given context, and return the result.

String

getText()

Returns a String containing the XPath expression.

Expr

simplify()

Simplifies the XPath expression.

Method Detail

public Object evaluate(Context context)

Evaluate the expression in the given context, and return 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.

Parameters: context the context in which the expression is evaluated

Returns: an object representing the result of the evaluation

Throws: JaxenException

public String getText()

Returns a String containing the XPath expression.

Returns: the text form of this XPath expression

public Expr simplify()

Simplifies the XPath expression. For example, the expression //para[1 = 1] could be simplified to //para. In practice, this is usually a noop. Jaxen does not currently perform any simplification.

Returns: the simplified expression