org.zkoss.xel.util
Class MethodFunction

java.lang.Object
  extended by org.zkoss.lang.reflect.SerializableMethod
      extended by org.zkoss.xel.util.MethodFunction
All Implemented Interfaces:
java.io.Serializable, java.lang.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
MethodFunction(java.lang.reflect.Method method)
           
 
Method Summary
 java.lang.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.
 java.lang.Class<?> getReturnType()
          Returns a Class object that represents the formal return type of the method represented by this Method object.
 java.lang.Object invoke(java.lang.Object obj, java.lang.Object... args)
          Invokes this method with the specified arguments.
 java.lang.reflect.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(java.lang.reflect.Method method)
Method Detail

getParameterTypes

public java.lang.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 java.lang.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 java.lang.Object invoke(java.lang.Object obj,
                               java.lang.Object... args)
                        throws java.lang.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:
java.lang.Exception

toMethod

public java.lang.reflect.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


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