kanela.agent.util.classloader

Class ScalaCompilerClassLoaderMatcher

java.lang.Object

net.bytebuddy.matcher.ElementMatcher.Junction.AbstractBase<java.lang.ClassLoader>

kanela.agent.util.classloader.ScalaCompilerClassLoaderMatcher

All Implemented Interfaces:

net.bytebuddy.matcher.ElementMatcher<java.lang.ClassLoader>, net.bytebuddy.matcher.ElementMatcher.Junction<java.lang.ClassLoader>

public class ScalaCompilerClassLoaderMatcher
extends net.bytebuddy.matcher.ElementMatcher.Junction.AbstractBase<java.lang.ClassLoader>

Nested Class Summary

Nested classes/interfaces inherited from interface net.bytebuddy.matcher.ElementMatcher.Junction

net.bytebuddy.matcher.ElementMatcher.Junction.AbstractBase<V>, net.bytebuddy.matcher.ElementMatcher.Junction.Conjunction<W>, net.bytebuddy.matcher.ElementMatcher.Junction.Disjunction<W>, net.bytebuddy.matcher.ElementMatcher.Junction.ForNonNullValues<W>

Nested classes/interfaces inherited from interface net.bytebuddy.matcher.ElementMatcher

net.bytebuddy.matcher.ElementMatcher.Junction<S>

Constructor Summary

Constructors

Constructor and Description
ScalaCompilerClassLoaderMatcher()

Method Summary

Modifier and Type	Method and Description
static boolean	isScalaCompilerClassLoader(java.lang.ClassLoader classLoader) Tries to determine whether a ClassLoader is the Scala Compiler ClassLoader on SBT.
boolean	matches(java.lang.ClassLoader classLoader)

Methods inherited from class net.bytebuddy.matcher.ElementMatcher.Junction.AbstractBase

and, or

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalaCompilerClassLoaderMatcher

public ScalaCompilerClassLoaderMatcher()

Method Detail

matches

public boolean matches(java.lang.ClassLoader classLoader)

isScalaCompilerClassLoader

public static boolean isScalaCompilerClassLoader(java.lang.ClassLoader classLoader)

Tries to determine whether a ClassLoader is the Scala Compiler ClassLoader on SBT. Since there is no special naming or treatment of this particular ClassLoader it is impossible to have a 100% reliable way to filter it out from the instrumentation process, but given that the jars found on it are quite particular (the compiler and jline) and there are usually just a handful of jars in that ClassLoader, we can have a level of certainty that if a ClassLoader has less than 6 jars and some of those are the compiler-related libraries then it must be the compiler ClassLoader. We are doing this check here instead of using a ClassLoaderNameMatcher because this is a relatively expensive check which might only be necessary in a few cases, so we rather filter the error than putting the burden of this check on every single class load.