org.slf4j.instrumentation

Class JavassistHelper

java.lang.Object

org.slf4j.instrumentation.JavassistHelper

public class JavassistHelper
extends java.lang.Object

Helper methods for Javassist functionality.

Constructor Summary

Constructors

Constructor and Description
JavassistHelper()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	getSignature(javassist.CtBehavior method) Return javassist source snippet which lists all the parameters and their values.
private static boolean	methodReturnsValue(javassist.CtBehavior method) determine if the given method returns a value, and return true if so.
(package private) static java.lang.String	parameterNameFor(javassist.CtBehavior method, javassist.bytecode.LocalVariableAttribute locals, int i) Determine the name of parameter with index i in the given method.
static java.lang.String	returnValue(javassist.CtBehavior method) Create a javassist source snippet which either is empty (for anything which does not return a value) or a explanatory text around the $_ javassist return value variable.

Methods inherited from class java.lang.Object

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

Constructor Detail

JavassistHelper

public JavassistHelper()

Method Detail

returnValue

public static java.lang.String returnValue(javassist.CtBehavior method)
                                    throws javassist.NotFoundException

Create a javassist source snippet which either is empty (for anything which does not return a value) or a explanatory text around the $_ javassist return value variable.

Parameters:

method - descriptor of method

Returns:

source snippet

Throws:

javassist.NotFoundException

methodReturnsValue

private static boolean methodReturnsValue(javassist.CtBehavior method)
                                   throws javassist.NotFoundException

determine if the given method returns a value, and return true if so. false otherwise.

Parameters:

method -

Returns:

Throws:

javassist.NotFoundException

getSignature

public static java.lang.String getSignature(javassist.CtBehavior method)
                                     throws javassist.NotFoundException

Return javassist source snippet which lists all the parameters and their values. If available the source names are extracted from the debug information and used, otherwise just a number is shown.

Parameters:

method -

Returns:

Throws:

javassist.NotFoundException

parameterNameFor

static java.lang.String parameterNameFor(javassist.CtBehavior method,
                                         javassist.bytecode.LocalVariableAttribute locals,
                                         int i)

Determine the name of parameter with index i in the given method. Use the locals attributes about local variables from the classfile. Note: This is still work in progress.

Parameters:

method -

locals -

i -

Returns:

the name of the parameter if available or a number if not.