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package javax.faces.el;
import javax.faces.context.FacesContext;
/**
* MethodBinding is an object that can be used
* to call an arbitrary public method, on an instance that is acquired by
* evaluatng the leading portion of a method binding expression via a
* {@link ValueBinding}. An immutable {@link MethodBinding} for a particular
* method binding expression can be acquired by calling the
* createMethodBinding() method of the
* {@link javax.faces.application.Application} instance for this web
* application.
*
*
* @deprecated This has been replaced by {@link javax.el.MethodExpression}.
*/
public abstract class MethodBinding {
/**
* Return the return value (if any) resulting from a call to the
* method identified by this method binding expression, passing it
* the specified parameters, relative to the specified {@link FacesContext}.
*
*
* @param context {@link FacesContext} for the current request
* @param params Array of parameters to be passed to the called method,
* or null for no parameters
*
* @throws EvaluationException if an exception is thrown
* by the called method (the thrown exception must be included as the
* cause property of this exception)
* @throws MethodNotFoundException if no suitable method can be found
* @throws NullPointerException if context
* is null
*
* @return the result of the invocation
*/
public abstract Object invoke(FacesContext context, Object params[])
throws EvaluationException, MethodNotFoundException;
/**
* Return the Java class representing the return type from the
* method identified by this method binding expression.
*
* @param context {@link FacesContext} for the current request
*
* @throws MethodNotFoundException if no suitable method can be found
* @throws NullPointerException if context
* is null
*
* @return the type of the return value
*/
public abstract Class getType(FacesContext context)
throws MethodNotFoundException;
/**
* Return the (possibly null) expression String,
* with leading and trailing delimiters, from which this
* MethodBinding was built. The default implementation
* returns null.
*
* @return the expression string
*/
public String getExpressionString() {
return null;
}
}