software.amazon.disco.agent.reflect

Class MethodHandleWrapper

java.lang.Object

software.amazon.disco.agent.reflect.MethodHandleWrapper

Deprecated.

deprecated in favour of software.amazon.disco.agent.interception.templates.DataAccessor which should be used wherever possible instead.

@Deprecated
public class MethodHandleWrapper
extends java.lang.Object

Simple utility to produce MethodHandles for commonly accessed methods Generally we need to access methods reflectively, to account for times when the Agent is built such that it is loaded into the Bootstrap classloader, which will not have direct access to classes loaded by the System classloader such as Apache classes, Servlet classes, ...

Constructor Summary

Constructors

Constructor and Description
MethodHandleWrapper(java.lang.String className, java.lang.ClassLoader classLoader, java.lang.String methodName, java.lang.Class rtype) Deprecated. Create a new MethodHandleWrapper
MethodHandleWrapper(java.lang.String className, java.lang.ClassLoader classLoader, java.lang.String methodName, java.lang.Class rtype, java.lang.Class... ptypes) Deprecated. Create a new MethodHandleWrapper
MethodHandleWrapper(java.lang.String className, java.lang.ClassLoader classLoader, java.lang.String methodName, java.lang.Class rtype, java.lang.String... ptypes) Deprecated. Create a new MethodHandleWrapper
MethodHandleWrapper(java.lang.String className, java.lang.ClassLoader classLoader, java.lang.String methodName, java.lang.String rtype, java.lang.String... ptypes) Deprecated. Create a new MethodHandleWrapper

Method Summary

Modifier and Type	Method and Description
java.lang.Class	getRtype() Deprecated. Get the return type of the method referred to by this MethodHandleWrapper
java.lang.Object	invoke(java.lang.Object receiver, java.lang.Object... args) Deprecated. Invoke the method referred to by this MethodHandleWrapper
boolean	isHandleLoaded() Deprecated. Method to provide information whether MethodHandle is loaded or not eg: returns false if any exceptions are thrown while building MethodHandle

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodHandleWrapper

public MethodHandleWrapper(java.lang.String className,
                           java.lang.ClassLoader classLoader,
                           java.lang.String methodName,
                           java.lang.Class rtype,
                           java.lang.Class... ptypes)

Deprecated.

Create a new MethodHandleWrapper

Parameters:

className - the fully qualified name of the owning class

classLoader - the ClassLoader to be used for finding className, should probably by ClassLoader.getSystemClassLoader()

methodName - the name of the method being looked up

rtype - the return type of the method

ptypes - the types of the parameters to the method

MethodHandleWrapper

public MethodHandleWrapper(java.lang.String className,
                           java.lang.ClassLoader classLoader,
                           java.lang.String methodName,
                           java.lang.Class rtype)

Deprecated.

Create a new MethodHandleWrapper

Parameters:

className - the fully qualified name of the owning class

classLoader - the ClassLoader to be used for finding className, should probably by ClassLoader.getSystemClassLoader()

methodName - the name of the method being looked up

rtype - the return type of the method

MethodHandleWrapper

public MethodHandleWrapper(java.lang.String className,
                           java.lang.ClassLoader classLoader,
                           java.lang.String methodName,
                           java.lang.Class rtype,
                           java.lang.String... ptypes)

Deprecated.

Create a new MethodHandleWrapper

Parameters:

className - the fully qualified name of the owning class

classLoader - the ClassLoader to be used for finding className, should probably by ClassLoader.getSystemClassLoader()

methodName - the name of the method being looked up

rtype - the return type of the method

ptypes - the names of the types of the parameters to the method

MethodHandleWrapper

public MethodHandleWrapper(java.lang.String className,
                           java.lang.ClassLoader classLoader,
                           java.lang.String methodName,
                           java.lang.String rtype,
                           java.lang.String... ptypes)
                    throws java.lang.Exception

Deprecated.

Create a new MethodHandleWrapper

Parameters:

className - the fully qualified name of the owning class

classLoader - the ClassLoader to be used for finding className, should probably by ClassLoader.getSystemClassLoader()

methodName - the name of the method being looked up

rtype - the name of the return type of the method

ptypes - the names of the types of the parameters to the method

Throws:

java.lang.Exception - - ClassNotFoundException could be thrown if classpath for rtype is not found.

Method Detail

invoke

public java.lang.Object invoke(java.lang.Object receiver,
                               java.lang.Object... args)

Deprecated.

Invoke the method referred to by this MethodHandleWrapper

Parameters:

receiver - the object upon which this method is being invoked, the 'this' of the method call

args - the arguments being passed to the method, which should match the types given during construction as 'ptypes'

Returns:

the return value of the invoked method

getRtype

public java.lang.Class getRtype()

Deprecated.

Get the return type of the method referred to by this MethodHandleWrapper

Returns:

the class of the method's return type

isHandleLoaded

public boolean isHandleLoaded()

Deprecated.

Method to provide information whether MethodHandle is loaded or not eg: returns false if any exceptions are thrown while building MethodHandle

Returns:

the Boolean