org.objectweb.asm.util
Class TraceClassVisitor
java.lang.Object
|
+--org.objectweb.asm.util.PrintClassVisitor
|
+--org.objectweb.asm.util.TraceClassVisitor
- All Implemented Interfaces:
- ClassVisitor
- public class TraceClassVisitor
- extends PrintClassVisitor
A PrintClassVisitor
that prints a disassembled
view of the classes it visits. This class visitor can be used alone (see the
main
method) to disassemble a class. It can also be used in
the middle of class visitor chain to trace the class that is visited at a
given point in this chain. This may be uselful for debugging purposes.
The trace printed when visiting the Hello class is the following:
// compiled from Hello.java
public class Hello {
public static main ([Ljava/lang/String;)V
GETSTATIC java/lang/System out Ljava/io/PrintStream;
LDC "hello"
INVOKEVIRTUAL java/io/PrintStream println (Ljava/lang/String;)V
RETURN
MAXSTACK = 2
MAXLOCALS = 1
public <init> ()V
ALOAD 0
INVOKESPECIAL java/lang/Object <init> ()V
RETURN
MAXSTACK = 1
MAXLOCALS = 1
}
where Hello is defined by:
public class Hello {
public static void main (String[] args) {
System.out.println("hello");
}
}
Method Summary |
static void |
main(String[] args)
Prints a disassembled view of the given class to the standard output.
|
PrintCodeVisitor |
printMethod(int access,
String name,
String desc,
String[] exceptions)
|
void |
visit(int access,
String name,
String superName,
String[] interfaces,
String sourceFile)
Visits the header of the class. |
void |
visitEnd()
Visits the end of the class. |
void |
visitField(int access,
String name,
String desc,
Object value)
Visits a field of the class. |
void |
visitInnerClass(String name,
String outerName,
String innerName,
int access)
Visits information about an inner class. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TraceClassVisitor
public TraceClassVisitor(ClassVisitor cv,
PrintWriter pw)
- Constructs a new
TraceClassVisitor
object.
- Parameters:
cv
- the class visitor to which this adapter must delegate calls. May
be null.pw
- the print writer to be used to print the trace.
main
public static void main(String[] args)
throws Exception
- Prints a disassembled view of the given class to the standard output.
Usage: TraceClassVisitor <fully qualified class name>
visit
public void visit(int access,
String name,
String superName,
String[] interfaces,
String sourceFile)
- Description copied from interface:
ClassVisitor
- Visits the header of the class.
- Following copied from interface:
org.objectweb.asm.ClassVisitor
- Parameters:
access
- the class's access flags (see Constants
). This
parameter also indicates if the class is deprecated.name
- the internal name of the class (see getInternalName
).superName
- the internal of name of the super class (see getInternalName
). For interfaces, the super
class is Object
.interfaces
- the internal names of the class's interfaces (see getInternalName
). May be null.sourceFile
- the name of the source file from which this class was
compiled. May be null.
visitInnerClass
public void visitInnerClass(String name,
String outerName,
String innerName,
int access)
- Description copied from interface:
ClassVisitor
- Visits information about an inner class. This inner class is not
necessarily a member of the class being visited.
- Following copied from interface:
org.objectweb.asm.ClassVisitor
- Parameters:
name
- the internal name of an inner class (see getInternalName
).outerName
- the internal name of the class to which the inner class
belongs (see getInternalName
). May be
null.innerName
- the (simple) name of the inner class inside its enclosing
class. May be null for anonymous inner classes.access
- the access flags of the inner class as originally declared
in the enclosing class.
visitField
public void visitField(int access,
String name,
String desc,
Object value)
- Description copied from interface:
ClassVisitor
- Visits a field of the class.
- Following copied from interface:
org.objectweb.asm.ClassVisitor
- Parameters:
access
- the field's access flags (see Constants
). This
parameter also indicates if the field is synthetic and/or deprecated.name
- the field's name.desc
- the field's descriptor (see Type
).value
- the field's initial value. This parameter, which may be
null if the field does not have an initial value, must be an
Integer
, a Float
, a
Long
, a Double
or a
String
.
printMethod
public PrintCodeVisitor printMethod(int access,
String name,
String desc,
String[] exceptions)
- Overrides:
printMethod
in class PrintClassVisitor
visitEnd
public void visitEnd()
- Description copied from interface:
ClassVisitor
- Visits the end of the class. This method, which is the last one to be
called, is used to inform the visitor that all the fields and methods of
the class have been visited.
- Overrides:
visitEnd
in class PrintClassVisitor