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release-notes.md

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Byte Buddy release notes

02. Mai 2014: Version 0.1

First general release.

16. June 2014: Version 0.2

Added several bug fixes for existing features. Beyond that the following features were added or changed:

  • Changed the semantics of the @SuperCall to be only bindable, if a super method can be invoked. Before, an exception was thrown if only a non-existent or abstract super method was found.
  • Added features for the interaction with Java 8 default methods. Refactored method lookup to extract invokable default methods.
  • Refactored the invocation of super methods to be created by an Instrumentation.Target. For a future release, this hopefully allows for class redefinitions using today's API for creating subclasses.
  • Upgraded to ASM 5.0.3.

20. June 2014: Version 0.2.1

Added proper support for defining class initializers. Added support for field caching from method instrumentations, mainly for allowing the reuse of Method instances for the @Origin annotation and the InvocationHandlerAdapter.

15. September 2014: Version 0.3

  • Added basic support for Java 7 types MethodHandle and MethodType which are available from Java 7 for injection.
  • Added support for type redefinition and type rebasing.
  • Added support for accessing a JVM's HotSwap features and a Java agent.
  • Added latent a child-first ClassLoadingStrategy and manifest versions of the WRAPPER and CHILD_FIRST default class loading strategies.

19. September 2014: Version 0.3.1

  • Added support for optionally specifying a ProtectionDomain for the built-in ClassLoadingStrategy implementations.
  • Fixed a bug in the resolution of resources of the ByteArrayClassLoader and its child-first implementation.

18. November 2014: Version 0.4

  • Extended Instrumentation.Context to support field accessors.
  • Added the TypePool abstraction and added a default implementation.
  • Refactored annotations to have an intermediate form as AnnotationDescription which does not need to represent loaded values.
  • Refactored several built-in Instrumentation, among others, all implementations now support TypeDescription in addition to loaded Class as their arguments
  • Added several annotations that apply to the MethodDelegation.

26. November 2014: Version 0.4.1

  • Refactored the implementation of the VoidAwareAssigner which would otherwise cause unexpected behavior in its default state.
  • Added a missing boxing instruction to the InvocationHandlerAdapter.

3. December 2014: Version 0.5

  • Added the DeclaringTypeResolver as a component in the default chain which selects the most specific method out of two. This is mainly meant to avoid the accidental matching of the methods that are declared by the Object type.
  • Added TypeInitializers in order to allow Instrumentations to define type initializer blocks.
  • Replaced the MethodMatcher API with the ElementMatcher API which allows for a more sophisticated matching DSL.
  • Added a ClassLoadingStrategy for Android in its own module.
  • Introduced an AgentBuilder API and implementation.

5. December 2014: Version 0.5.1

Added the andThen method to the SuperMethodCall instrumentation in order to allow for a more convenient constructor interception where a hard-coded super method call is required by the Java verifier.

18. January 2015: Version 0.5.2

  • Fixed a bug where interface generation would result in a NullPointerException.
  • Added additional ElementMatchers that allow to identify class loaders.

24. February 2015: Version 0.5.3

  • Changed the SuperMethodCall instrumentation to fall back to a default method call if required. A different behavior was found to surprise users and would introduce subtle bugs in user code as the super method instrumentation would always work with subclassing due to Java super method call semantics.
  • Added a MethodCall instrumentation that allows hard-coding a method call.
  • Added an InvokeDynamic instrumentation that allows runtime dispatching by bootstrap methods.
  • Fixed the default TypePool to retain generic signatures in order to avoid that agents delete such signatures.
  • Fixed a bug in all of the the default ConstructorStrategy that effectively prevented intercepting of constructors.

15. March 2015: Version 0.5.4

  • Fixed missing retention of method annotations of instrumented types.
  • Allowed dynamic lookup of methods for the MethodCall instrumentation.

20. March 2015: Version 0.5.5

  • Retrofitted method parameters to be represented by ParameterDescriptions and added possibility to extract names and modifiers for these parameters, either by using the Java 8 API (if available) or by reading this information from the underlying class file.
  • Fixed a NullPointerException being thrown due to accidental return of a null value from a method.

21. March 2015

  • Added possibility to write parameter meta information to created classes if it is fully available for a method.

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