railo.transformer.bytecode.reflection
Class ASMMethod

java.lang.Object
  extended by railo.transformer.bytecode.reflection.ASMMethod

public abstract class ASMMethod
extends Object

A Method provides information about, and access to, a single method on a class or interface. The reflected method may be a class method or an instance method (including an abstract method).

A Method permits widening conversions to occur when matching the actual parameters to invoke with the underlying method's formal parameters, but it throws an IllegalArgumentException if a narrowing conversion would occur.

See Also:
Member, Class, Class.getMethods(), Class.getMethod(String, Class[]), Class.getDeclaredMethods(), Class.getDeclaredMethod(String, Class[])

Constructor Summary
ASMMethod(Class declaringClass, Class[] parameterTypes)
          Package-private constructor used by ReflectAccess to enable instantiation of these objects in Java code from the java.lang package via sun.reflect.LangReflectAccess.
 
Method Summary
 boolean equals(Object obj)
          Compares this Method against the specified object.
 Class<?> getDeclaringClass()
          Returns the Class object representing the class or interface that declares the method represented by this Method object.
 Class<?>[] getExceptionTypes()
          Returns an array of Class objects that represent the types of the exceptions declared to be thrown by the underlying method represented by this Method object.
abstract  int getModifiers()
          Returns the Java language modifiers for the method represented by this Method object, as an integer.
abstract  String getName()
          Returns the name of the method represented by this Method object, as a String.
 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.
abstract  String getReturnTypeAsString()
           
abstract  Object invoke(Object obj, Object[] args)
          Invokes the underlying method represented by this Method object, on the specified object with the specified parameters.
 
Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ASMMethod

public ASMMethod(Class declaringClass,
                 Class[] parameterTypes)
Package-private constructor used by ReflectAccess to enable instantiation of these objects in Java code from the java.lang package via sun.reflect.LangReflectAccess.

Method Detail

getDeclaringClass

public Class<?> getDeclaringClass()
Returns the Class object representing the class or interface that declares the method represented by this Method object.


getName

public abstract String getName()
Returns the name of the method represented by this Method object, as a String.


getModifiers

public abstract int getModifiers()
Returns the Java language modifiers for the method represented by this Method object, as an integer. The Modifier class should be used to decode the modifiers.

See Also:
Modifier

getReturnType

public Class<?> getReturnType()
Returns a Class object that represents the formal return type of the method represented by this Method object.

Returns:
the return type for the method this object represents

getReturnTypeAsString

public abstract String getReturnTypeAsString()

getParameterTypes

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

Returns:
the parameter types for the method this object represents

getExceptionTypes

public Class<?>[] getExceptionTypes()
Returns an array of Class objects that represent the types of the exceptions declared to be thrown by the underlying method represented by this Method object. Returns an array of length 0 if the method declares no exceptions in its throws clause.

Returns:
the exception types declared as being thrown by the method this object represents

equals

public boolean equals(Object obj)
Compares this Method against the specified object. Returns true if the objects are the same. Two Methods are the same if they were declared by the same class and have the same name and formal parameter types and return type.

Overrides:
equals in class Object

invoke

public abstract Object invoke(Object obj,
                              Object[] args)
                       throws Throwable
Invokes the underlying method represented by this Method object, on the specified object with the specified parameters. Individual parameters are automatically unwrapped to match primitive formal parameters, and both primitive and reference parameters are subject to method invocation conversions as necessary.

If the underlying method is static, then the specified obj argument is ignored. It may be null.

If the number of formal parameters required by the underlying method is 0, the supplied args array may be of length 0 or null.

If the underlying method is an instance method, it is invoked using dynamic method lookup as documented in The Java Language Specification, Second Edition, section 15.12.4.4; in particular, overriding based on the runtime type of the target object will occur.

If the underlying method is static, the class that declared the method is initialized if it has not already been initialized.

If the method completes normally, the value it returns is returned to the caller of invoke; if the value has a primitive type, it is first appropriately wrapped in an object. However, if the value has the type of an array of a primitive type, the elements of the array are not wrapped in objects; in other words, an array of primitive type is returned. If the underlying method return type is void, the invocation returns null.

Parameters:
obj - the object the underlying method is invoked from
args - the arguments used for the method call
Returns:
the result of dispatching the method represented by this object on obj with parameters args
Throws:
IllegalAccessException - if this Method object enforces Java language access control and the underlying method is inaccessible.
IllegalArgumentException - if the method is an instance method and the specified object argument is not an instance of the class or interface declaring the underlying method (or of a subclass or implementor thereof); if the number of actual and formal parameters differ; if an unwrapping conversion for primitive arguments fails; or if, after possible unwrapping, a parameter value cannot be converted to the corresponding formal parameter type by a method invocation conversion.
InvocationTargetException - if the underlying method throws an exception.
NullPointerException - if the specified object is null and the method is an instance method.
ExceptionInInitializerError - if the initialization provoked by this method fails.
Throwable


Copyright © 2012 Railo