org.jaxen.expr
Class DefaultUnaryExpr

java.lang.Object
  extended byorg.jaxen.expr.DefaultExpr
      extended byorg.jaxen.expr.DefaultUnaryExpr
All Implemented Interfaces:
Expr, java.io.Serializable, UnaryExpr

class DefaultUnaryExpr
extends DefaultExpr
implements UnaryExpr


Field Summary
private  Expr expr
           
private static long serialVersionUID
           
 
Constructor Summary
(package private) DefaultUnaryExpr(Expr expr)
           
 
Method Summary
 java.lang.Object evaluate(Context context)
          Evaluate the expression in the given context, and return the result.
 Expr getExpr()
          Returns the expression following the minus sign.
 java.lang.String getText()
          Returns a String containing the XPath expression.
 Expr simplify()
          Simplifies the XPath expression.
 java.lang.String toString()
           
 
Methods inherited from class org.jaxen.expr.DefaultExpr
convertToIterator, convertToList
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

serialVersionUID

private static final long serialVersionUID
See Also:
Constant Field Values

expr

private Expr expr
Constructor Detail

DefaultUnaryExpr

DefaultUnaryExpr(Expr expr)
Method Detail

getExpr

public Expr getExpr()
Description copied from interface: UnaryExpr
Returns the expression following the minus sign.

Specified by:
getExpr in interface UnaryExpr
Returns:
the expression following the minus sign

toString

public java.lang.String toString()

getText

public java.lang.String getText()
Description copied from interface: Expr
Returns a String containing the XPath expression.

Specified by:
getText in interface Expr
Returns:
the text form of this XPath expression

simplify

public Expr simplify()
Description copied from interface: Expr
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.

Specified by:
simplify in interface Expr
Overrides:
simplify in class DefaultExpr

evaluate

public java.lang.Object evaluate(Context context)
                          throws JaxenException
Description copied from interface: Expr
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.

Specified by:
evaluate in interface Expr
Parameters:
context - the context in which the expression is evaluated
Returns:
an object representing the result of the evaluation
Throws:
JaxenException