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reactor.blockhound

pack-priv Class NativeWrappingClassFileTransformer

extends Object
implements ClassFileTransformer
Class Inheritance
All Implemented Interfaces
java.lang.instrument.ClassFileTransformer
Imports
net.bytebuddy.jar.asm.*, java.lang.instrument.ClassFileTransformer, java.security.ProtectionDomain, java.util.Map, .Set
This ASM-based transformer finds all methods defined in NativeWrappingClassFileTransformer#blockingMethods and creates a delegating method by prefixing the original native method.

Nested and Inner Type Summary

Modifier and TypeClass and Description
pack-priv static class
NativeWrappingClassFileTransformer.NativeWrappingClassVisitor

Field Summary

Modifier and TypeField and Description
pack-priv static final Type
BLOCK_HOUND_RUNTIME_TYPE

private final Map<String, Map<String, Set<String>>>
blockingMethods

Constructor Summary

AccessConstructor and Description
pack-priv
NativeWrappingClassFileTransformer(final Map<String, Map<String, Set<String>>> blockingMethods)

Method Summary

Modifier and TypeMethod and Description
public byte[]
transform(ClassLoader
the defining loader of the class to be transformed, may be null if the bootstrap loader
loader, String
the name of the class in the internal form of fully qualified class and interface names as defined in The Java Virtual Machine Specification. For example, "java/util/List".
className, Class<?>
if this is triggered by a redefine or retransform, the class being redefined or retransformed; if this is a class load, null
classBeingRedefined, ProtectionDomain
the protection domain of the class being defined or redefined
protectionDomain, byte[]
the input byte buffer in class file format - must not be modified
classfileBuffer)

Overrides default java.lang.instrument.ClassFileTransformer.transform.

Transforms the given class file and returns a new replacement class file.
Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

BLOCK_HOUND_RUNTIME_TYPEback to summary
pack-priv static final Type BLOCK_HOUND_RUNTIME_TYPE
blockingMethodsback to summary
private final Map<String, Map<String, Set<String>>> blockingMethods

Constructor Detail

NativeWrappingClassFileTransformerback to summary
pack-priv NativeWrappingClassFileTransformer(final Map<String, Map<String, Set<String>>> blockingMethods)

Method Detail

transformback to summary
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)

Overrides default java.lang.instrument.ClassFileTransformer.transform.

Doc from java.lang.instrument.ClassFileTransformer.transform.

Transforms the given class file and returns a new replacement class file. This method is invoked when the Module bearing transform is not overridden.

Parameters
loader:ClassLoader

the defining loader of the class to be transformed, may be null if the bootstrap loader

className:String

the name of the class in the internal form of fully qualified class and interface names as defined in The Java Virtual Machine Specification. For example, "java/util/List".

classBeingRedefined:Class<?>

if this is triggered by a redefine or retransform, the class being redefined or retransformed; if this is a class load, null

protectionDomain:ProtectionDomain

the protection domain of the class being defined or redefined

classfileBuffer:byte[]

the input byte buffer in class file format - must not be modified

Returns:byte[]

a well-formed class file buffer (the result of the transform), or null if no transform is performed

Annotations
@Override
reactor.blockhound back to summary

pack-priv Class NativeWrappingClassFileTransformer.NativeWrappingClassVisitor

extends ClassVisitor
Class Inheritance

Field Summary

Modifier and TypeField and Description
private final String
className

private final Map<String, Set<String>>
methods

Inherited from net.bytebuddy.jar.asm.ClassVisitor:
apicv

Constructor Summary

AccessConstructor and Description
pack-priv
NativeWrappingClassVisitor(ClassVisitor cw, Map<String, Set<String>> methods, String internalClassName)

Method Summary

Modifier and TypeMethod and Description
public MethodVisitor
visitMethod(int
the method's access flags (see Opcodes). This parameter also indicates if the method is synthetic and/or deprecated.
access, String
the method's name.
name, String
the method's descriptor (see Type).
descriptor, String
the method's signature. May be null if the method parameters, return type and exceptions do not use generic types.
signature, String[]
the internal names of the method's exception classes (see Type#getInternalName()). May be null.
exceptions)

Overrides net.bytebuddy.jar.asm.ClassVisitor.visitMethod.

Visits a method of the class.
Inherited from net.bytebuddy.jar.asm.ClassVisitor:
getDelegatevisitvisitAnnotationvisitAttributevisitEndvisitFieldvisitInnerClassvisitModulevisitNestHostvisitNestMembervisitOuterClassvisitPermittedSubclassvisitRecordComponentvisitSourcevisitTypeAnnotation

Field Detail

classNameback to summary
private final String className
methodsback to summary
private final Map<String, Set<String>> methods

Constructor Detail

NativeWrappingClassVisitorback to summary
pack-priv NativeWrappingClassVisitor(ClassVisitor cw, Map<String, Set<String>> methods, String internalClassName)

Method Detail

visitMethodback to summary
public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions)

Overrides net.bytebuddy.jar.asm.ClassVisitor.visitMethod.

Doc from net.bytebuddy.jar.asm.ClassVisitor.visitMethod.

Visits a method of the class. This method must return a new MethodVisitor instance (or null) each time it is called, i.e., it should not return a previously returned visitor.

Parameters
access:int

the method's access flags (see Opcodes). This parameter also indicates if the method is synthetic and/or deprecated.

name:String

the method's name.

descriptor:String

the method's descriptor (see Type).

signature:String

the method's signature. May be null if the method parameters, return type and exceptions do not use generic types.

exceptions:String[]

the internal names of the method's exception classes (see Type#getInternalName()). May be null.

Returns:MethodVisitor

an object to visit the byte code of the method, or null if this class visitor is not interested in visiting the code of this method.

Annotations
@Override