org.jaxen.expr

Class DefaultUnaryExpr

java.lang.Object

org.jaxen.expr.DefaultExpr

org.jaxen.expr.DefaultUnaryExpr

All Implemented Interfaces:

java.io.Serializable, Expr, UnaryExpr

class DefaultUnaryExpr
extends DefaultExpr
implements UnaryExpr

Field Summary

Fields

Modifier and Type	Field and Description
private Expr	expr
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
DefaultUnaryExpr(Expr expr)

Method Summary

Modifier and Type	Method and Description
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()

Overrides:

toString in class java.lang.Object

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

Returns:

the simplified expression

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