org.jaxen.expr
Class DefaultPredicate

java.lang.Object
  org.jaxen.expr.DefaultPredicate

All Implemented Interfaces:

java.io.Serializable, Predicate

 class DefaultPredicate
extends java.lang.Object
implements Predicate

Field Summary

private Expr	expr
private static long	serialVersionUID

Constructor Summary

DefaultPredicate(Expr 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.
java.lang.String	toString()

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

DefaultPredicate

DefaultPredicate(Expr expr)

Method Detail

getExpr

public Expr getExpr()

Description copied from interface: Predicate

Returns the expression in this predicate.

Specified by:

getExpr in interface Predicate

Returns:

the expression between the brackets

setExpr

public void setExpr(Expr expr)

Description copied from interface: Predicate

Change the expression used by this predicate.

Specified by:

setExpr in interface Predicate

Parameters:

expr - the new expression

getText

public java.lang.String getText()

Description copied from interface: Predicate

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

Specified by:

getText in interface Predicate

Returns:

the bracketed form of this predicate

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

simplify

public void simplify()

Description copied from interface: Predicate

Simplify the expression in this predicate.

Specified by:

simplify in interface Predicate

See Also:

Expr.simplify()

evaluate

public java.lang.Object evaluate(Context context)
                          throws JaxenException

Description copied from interface: Predicate

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)