javax.el

Class MethodExpression

java.lang.Object

javax.el.Expression

javax.el.MethodExpression

public abstract class MethodExpression
extends Expression

Expression representing a method on a specific object.

Since:

2.1

Constructor Summary

Constructors

Constructor and Description
MethodExpression()

Method Summary

Methods

Modifier and Type	Method and Description
abstract MethodInfo	getMethodInfo(ELContext context) Returns information about the referenced method.
abstract java.lang.Object	invoke(ELContext context, java.lang.Object[] params) If the expression is a string literal, returns its value coerced to the expected return type of the method signature.

Methods inherited from class javax.el.Expression

equals, getExpressionString, hashCode, isLiteralText

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MethodExpression

public MethodExpression()

Method Detail

getMethodInfo

public abstract MethodInfo getMethodInfo(ELContext context)
                                  throws java.lang.NullPointerException,
                                         PropertyNotFoundException,
                                         MethodNotFoundException,
                                         ELException

Returns information about the referenced method.

Parameters:

context - the evaluation context

Throws:

java.lang.NullPointerException

PropertyNotFoundException

MethodNotFoundException

ELException

invoke

public abstract java.lang.Object invoke(ELContext context,
                      java.lang.Object[] params)
                                 throws java.lang.NullPointerException,
                                        PropertyNotFoundException,
                                        MethodNotFoundException,
                                        ELException

If the expression is a string literal, returns its value coerced to the expected return type of the method signature. If not, returns the result of the method invocation using the specified parameters.

Parameters:

context - the evaluation context

params - the parameters to pass the method or null

Returns:

the result of the method invocation or null if void

Throws:

java.lang.NullPointerException

PropertyNotFoundException

MethodNotFoundException

ELException