org.zkoss.xel.util

Class MethodFunction

java.lang.Object

org.zkoss.lang.reflect.SerializableMethod

org.zkoss.xel.util.MethodFunction

All Implemented Interfaces:

Serializable, Cloneable, Function

public class MethodFunction
extends SerializableMethod
implements Function

A XEL function based on java.lang.reflect.Method. It is used by implementation of ExpressionFactory The user of XEL expressions rarely need it.

Since:

3.0.0

Author:

tomyeh

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MethodFunction(Method method)

Method Summary

Modifier and Type	Method and Description
Class<?>[]	getParameterTypes() Returns an array of Class objects that represent the formal parameter types, in declaration order, of the method represented by this Method object.
Class<?>	getReturnType() Returns a Class object that represents the formal return type of the method represented by this Method object.
Object	invoke(Object obj, Object... args) Invokes this method with the specified arguments.
Method	toMethod() Converts this function to a method, or null if unable to convert.

Methods inherited from class org.zkoss.lang.reflect.SerializableMethod

clone, equals, getMethod, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MethodFunction

public MethodFunction(Method method)

Method Detail

getParameterTypes

public Class<?>[] getParameterTypes()

Description copied from interface: Function

Returns an array of Class objects that represent the formal parameter types, in declaration order, of the method represented by this Method object.

Returns an array of length 0 if the underlying method takes no parameters.

Specified by:

getParameterTypes in interface Function

getReturnType

public Class<?> getReturnType()

Description copied from interface: Function

Returns a Class object that represents the formal return type of the method represented by this Method object.

Specified by:

getReturnType in interface Function

invoke

public Object invoke(Object obj,
                     Object... args)
              throws Exception

Description copied from interface: Function

Invokes this method with the specified arguments.

Specified by:

invoke in interface Function

Parameters:

obj - the object the underlying method is invoked from. It is always null if this function is invoked in an XEL expression. It is reserved for more sophisticated expressions, such as ZK Spreadsheet's expressions.

args - the arguments used for the method call. If null, an Object array with zero length is assumed.

Throws:

Exception

toMethod

public Method toMethod()

Description copied from interface: Function

Converts this function to a method, or null if unable to convert.

Specified by:

toMethod in interface Function