Package net.bytebuddy.agent.builder
Class ResettableClassFileTransformer.WithDelegation
- java.lang.Object
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- net.bytebuddy.agent.builder.ResettableClassFileTransformer.AbstractBase
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- net.bytebuddy.agent.builder.ResettableClassFileTransformer.WithDelegation
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- All Implemented Interfaces:
java.lang.instrument.ClassFileTransformer
,ResettableClassFileTransformer
- Enclosing interface:
- ResettableClassFileTransformer
@Enhance public abstract static class ResettableClassFileTransformer.WithDelegation extends ResettableClassFileTransformer.AbstractBase
Implements a resettable class file transformer that allows for the delegation of a transformation. Typically implemented when using aAgentBuilder.TransformerDecorator
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Nested Class Summary
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Nested classes/interfaces inherited from interface net.bytebuddy.agent.builder.ResettableClassFileTransformer
ResettableClassFileTransformer.AbstractBase, ResettableClassFileTransformer.WithDelegation
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Field Summary
Fields Modifier and Type Field Description protected ResettableClassFileTransformer
classFileTransformer
The class file transformer to delegate to.
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Constructor Summary
Constructors Modifier Constructor Description protected
WithDelegation(ResettableClassFileTransformer classFileTransformer)
Creates a new delegating resettable class file transformer.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.util.Iterator<AgentBuilder.Transformer>
iterator(TypeDescription typeDescription, java.lang.ClassLoader classLoader, JavaModule module, java.lang.Class<?> classBeingRedefined, java.security.ProtectionDomain protectionDomain)
Creates an iterator over the transformers that are applied for a given type.boolean
reset(java.lang.instrument.Instrumentation instrumentation, ResettableClassFileTransformer classFileTransformer, AgentBuilder.RedefinitionStrategy redefinitionStrategy, AgentBuilder.RedefinitionStrategy.DiscoveryStrategy redefinitionDiscoveryStrategy, AgentBuilder.RedefinitionStrategy.BatchAllocator redefinitionBatchAllocator, AgentBuilder.RedefinitionStrategy.Listener redefinitionListener)
Deregisters this class file transformer and redefines any transformed class to its state without this class file transformer applied, if the supplied redefinition strategy is enabled.-
Methods inherited from class net.bytebuddy.agent.builder.ResettableClassFileTransformer.AbstractBase
reset, reset, reset, reset, reset, reset, reset
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Field Detail
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classFileTransformer
protected final ResettableClassFileTransformer classFileTransformer
The class file transformer to delegate to.
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Constructor Detail
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WithDelegation
protected WithDelegation(ResettableClassFileTransformer classFileTransformer)
Creates a new delegating resettable class file transformer.- Parameters:
classFileTransformer
- The class file transformer to delegate to.
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Method Detail
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iterator
public java.util.Iterator<AgentBuilder.Transformer> iterator(TypeDescription typeDescription, java.lang.ClassLoader classLoader, JavaModule module, java.lang.Class<?> classBeingRedefined, java.security.ProtectionDomain protectionDomain)
Creates an iterator over the transformers that are applied for a given type.- Parameters:
typeDescription
- A description of a type.classLoader
- The type's class loader.module
- The type's module.classBeingRedefined
- The class being redefined ornull
if the type is not yet loaded.protectionDomain
- The type's protection domain.- Returns:
- An iterator over the transformers that are applied by this class file transformer if the given type is discovered.
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reset
public boolean reset(java.lang.instrument.Instrumentation instrumentation, ResettableClassFileTransformer classFileTransformer, AgentBuilder.RedefinitionStrategy redefinitionStrategy, AgentBuilder.RedefinitionStrategy.DiscoveryStrategy redefinitionDiscoveryStrategy, AgentBuilder.RedefinitionStrategy.BatchAllocator redefinitionBatchAllocator, AgentBuilder.RedefinitionStrategy.Listener redefinitionListener)
Deregisters this class file transformer and redefines any transformed class to its state without this class file transformer applied, if the supplied redefinition strategy is enabled. If it is not enabled, only the
AgentBuilder.InstallationListener
is informed about the resetting without undoing any code changes.Note: A reset class file transformer should not be reinstalled. Instead, the
AgentBuilder
which built the transformer should be asked to install a new transformer.Important: Most JVMs do not support changes of a class's structure after a class was already loaded. Therefore, it is typically required that this class file transformer was built while enabling
AgentBuilder.disableClassFormatChanges()
.- Parameters:
instrumentation
- The instrumentation instance from which to deregister the transformer.classFileTransformer
- The actual class file transformer to deregister which might bethis
instance or any wrapper.redefinitionStrategy
- The redefinition to apply.redefinitionDiscoveryStrategy
- The discovery strategy for the types to reset.redefinitionBatchAllocator
- The batch allocator to use.redefinitionListener
- The redefinition listener to apply.- Returns:
true
if a reset was applied and this transformer was not previously removed.
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