com.videobug.agent.weaver

Class ClassTransformer

java.lang.Object

org.objectweb.asm.ClassVisitor

com.videobug.agent.weaver.ClassTransformer

public class ClassTransformer
extends org.objectweb.asm.ClassVisitor

This class weaves logging code into a Java class file. The constructors execute the weaving process.

Field Summary

Fields inherited from class org.objectweb.asm.ClassVisitor

api, cv

Constructor Summary

Constructors

Modifier	Constructor and Description
	ClassTransformer(WeaveLog weaver, WeaveConfig config, byte[] inputClass, ClassLoader loader) This constructor weaves the given class and provides the result.
	ClassTransformer(WeaveLog weaver, WeaveConfig config, org.objectweb.asm.ClassReader reader, ClassLoader loader) This constructor weaves the given class and provides the result.
protected	ClassTransformer(WeaveLog weaver, WeaveConfig config, org.objectweb.asm.ClassWriter cw) Initializes the object as a ClassVisitor.

Method Summary

Modifier and Type	Method and Description
String	getClassLoaderIdentifier()
String	getClassName()
String	getFullClassName()
String[]	getInterfaces()
String	getPackageName()
String	getSignature()
String	getSourceFileName()
String	getSuperName()
byte[]	getWeaveResult()
void	visit(int version, int access, String name, String signature, String superName, String[] interfaces) A call back from the ClassVisitor.
org.objectweb.asm.AnnotationVisitor	visitAnnotation(String descriptor, boolean visible)
void	visitInnerClass(String name, String outerName, String innerName, int access) A call back from the ClassVisitor.
org.objectweb.asm.MethodVisitor	visitMethod(int access, String name, String desc, String signature, String[] exceptions) A call back from the ClassVisitor.
void	visitSource(String source, String debug) A call back from the ClassVisitor.
org.objectweb.asm.AnnotationVisitor	visitTypeAnnotation(int typeRef, org.objectweb.asm.TypePath typePath, String descriptor, boolean visible)

Methods inherited from class org.objectweb.asm.ClassVisitor

visitAttribute, visitEnd, visitField, visitModule, visitNestHost, visitNestMember, visitOuterClass, visitPermittedSubclass, visitRecordComponent

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassTransformer

public ClassTransformer(WeaveLog weaver,
                        WeaveConfig config,
                        byte[] inputClass,
                        ClassLoader loader)
                 throws IOException

This constructor weaves the given class and provides the result.

Parameters:

weaver - specifies the state of the weaver.

config - specifies the configuration.

inputClass - specifies a byte array containing the target class.

loader - specifies a class loader that loaded the target class.

Throws:

IOException - may be thrown if an error occurs during the weaving.

ClassTransformer

public ClassTransformer(WeaveLog weaver,
                        WeaveConfig config,
                        org.objectweb.asm.ClassReader reader,
                        ClassLoader loader)

This constructor weaves the given class and provides the result.

Parameters:

weaver - specifies the state of the weaver.

config - specifies the configuration.

reader - specifies a class reader to read the target class.

loader - specifies a class loader that loaded the target class.

ClassTransformer

protected ClassTransformer(WeaveLog weaver,
                           WeaveConfig config,
                           org.objectweb.asm.ClassWriter cw)

Initializes the object as a ClassVisitor.

Parameters:

weaver - specifies the state of the weaver.

config - specifies the configuration.

cw - specifies the class writer (MetracerClassWriter).

Method Detail

visitAnnotation

public org.objectweb.asm.AnnotationVisitor visitAnnotation(String descriptor,
                                                           boolean visible)

Overrides:

visitAnnotation in class org.objectweb.asm.ClassVisitor

visitTypeAnnotation

public org.objectweb.asm.AnnotationVisitor visitTypeAnnotation(int typeRef,
                                                               org.objectweb.asm.TypePath typePath,
                                                               String descriptor,
                                                               boolean visible)

Overrides:

visitTypeAnnotation in class org.objectweb.asm.ClassVisitor

getWeaveResult

public byte[] getWeaveResult()

Returns:

the weaving result.

getFullClassName

public String getFullClassName()

Returns:

the full class name including the package name and class name

getClassName

public String getClassName()

Returns:

the class name without the package name

getPackageName

public String getPackageName()

Returns:

the package name

getClassLoaderIdentifier

public String getClassLoaderIdentifier()

Returns:

the class loader identifier

visit

public void visit(int version,
                  int access,
                  String name,
                  String signature,
                  String superName,
                  String[] interfaces)

A call back from the ClassVisitor. Record the class information to fields.

Overrides:

visit in class org.objectweb.asm.ClassVisitor

visitSource

public void visitSource(String source,
                        String debug)

A call back from the ClassVisitor. Record the source file name.

Overrides:

visitSource in class org.objectweb.asm.ClassVisitor

getSourceFileName

public String getSourceFileName()

visitInnerClass

public void visitInnerClass(String name,
                            String outerName,
                            String innerName,
                            int access)

A call back from the ClassVisitor. Record the outer class name if this class is an inner class.

Overrides:

visitInnerClass in class org.objectweb.asm.ClassVisitor

visitMethod

public org.objectweb.asm.MethodVisitor visitMethod(int access,
                                                   String name,
                                                   String desc,
                                                   String signature,
                                                   String[] exceptions)

A call back from the ClassVisitor. Create an instance of a MethodVisitor that inserts logging code into a method.

Overrides:

visitMethod in class org.objectweb.asm.ClassVisitor

getInterfaces

public String[] getInterfaces()

getSuperName

public String getSuperName()

getSignature

public String getSignature()