net.bytebuddy.dynamic

Class ClassFileLocator.ForInstrumentation

java.lang.Object

net.bytebuddy.dynamic.ClassFileLocator.ForInstrumentation

All Implemented Interfaces:

Closeable, AutoCloseable, ClassFileLocator

Enclosing interface:

ClassFileLocator

@HashCodeAndEqualsPlugin.Enhance
public static class ClassFileLocator.ForInstrumentation
extends Object
implements ClassFileLocator

A Java agent that allows the location of class files by emulating a retransformation. Note that this class file locator causes a class to be loaded in order to look up its class file. Also, this locator does deliberately not support the look-up of classes that represent lambda expressions.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ClassFileLocator.ForInstrumentation.ClassLoadingDelegate A delegate that is queried for loading a class.
protected static interface	ClassFileLocator.ForInstrumentation.Dispatcher A dispatcher to interact with the Instrumentation API.
protected static class	ClassFileLocator.ForInstrumentation.ExtractionClassFileTransformer A non-operational class file transformer that remembers the binary format of a given class.

Nested classes/interfaces inherited from interface net.bytebuddy.dynamic.ClassFileLocator

ClassFileLocator.Compound, ClassFileLocator.Filtering, ClassFileLocator.ForClassLoader, ClassFileLocator.ForFolder, ClassFileLocator.ForInstrumentation, ClassFileLocator.ForJarFile, ClassFileLocator.ForModule, ClassFileLocator.ForModuleFile, ClassFileLocator.ForUrl, ClassFileLocator.NoOp, ClassFileLocator.PackageDiscriminating, ClassFileLocator.Resolution, ClassFileLocator.Simple

Field Summary

Fields inherited from interface net.bytebuddy.dynamic.ClassFileLocator

CLASS_FILE_EXTENSION

Constructor Summary

Constructors

Constructor and Description
ForInstrumentation(Instrumentation instrumentation, ClassFileLocator.ForInstrumentation.ClassLoadingDelegate classLoadingDelegate) Creates an agent-based class file locator.
ForInstrumentation(Instrumentation instrumentation, ClassLoader classLoader) Creates an agent-based class file locator.

Method Summary

Modifier and Type	Method and Description
void	close()
static ClassFileLocator	fromInstalledAgent(ClassLoader classLoader) Returns an agent-based class file locator for the given class loader and an already installed Byte Buddy-agent.
ClassFileLocator.Resolution	locate(String name) Locates the class file for a given type and returns the binary data of the class file.
static ClassFileLocator	of(Instrumentation instrumentation, Class<?> type) Returns a class file locator that is capable of locating a class file for the given type using the given instrumentation instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

ForInstrumentation

public ForInstrumentation(Instrumentation instrumentation,
                          @MaybeNull
                          ClassLoader classLoader)

Creates an agent-based class file locator.

Parameters:

instrumentation - The instrumentation to be used.

classLoader - The class loader to read a class from or null to use the boot loader.

ForInstrumentation

public ForInstrumentation(Instrumentation instrumentation,
                          ClassFileLocator.ForInstrumentation.ClassLoadingDelegate classLoadingDelegate)

Creates an agent-based class file locator.

Parameters:

instrumentation - The instrumentation to be used.

classLoadingDelegate - The delegate responsible for class loading.

Method Detail

fromInstalledAgent

public static ClassFileLocator fromInstalledAgent(@MaybeNull
                                                  ClassLoader classLoader)

Returns an agent-based class file locator for the given class loader and an already installed Byte Buddy-agent.

Parameters:

classLoader - The class loader that is expected to load the looked-up a class.

Returns:

A class file locator for the given class loader based on a Byte Buddy agent.

of

public static ClassFileLocator of(Instrumentation instrumentation,
                                  Class<?> type)

Returns a class file locator that is capable of locating a class file for the given type using the given instrumentation instance.

Parameters:

instrumentation - The instrumentation instance to query for a retransformation.

type - The locatable type which class loader is used as a fallback.

Returns:

A class file locator for locating the class file of the given type.

locate

public ClassFileLocator.Resolution locate(String name)

Locates the class file for a given type and returns the binary data of the class file.

Specified by:

locate in interface ClassFileLocator

Parameters:

name - The name of the type to locate a class file representation for.

Returns:

Any binary representation of the type which might be illegal.

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable