Class ClassWriter
- java.lang.Object
-
- org.gjt.sp.jedit.bsh.org.objectweb.asm.ClassWriter
-
- All Implemented Interfaces:
ClassVisitor
public class ClassWriter extends java.lang.Object implements ClassVisitor
AClassVisitor
that generates Java class files. More precisely this visitor generates a byte array conforming to the Java class file format. It can be used alone, to generate a Java class "from scratch", or with one or more adapter class visitors to generate a modified class from one or more existing Java classes.
-
-
Constructor Summary
Constructors Constructor Description ClassWriter(boolean computeMaxs)
Constructs a newClassWriter
object.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description byte[]
toByteArray()
Returns the bytecode of the class that was build with this class writer.void
visit(int access, java.lang.String name, java.lang.String superName, java.lang.String[] interfaces, java.lang.String sourceFile)
Visits the header of the class.void
visitEnd()
Visits the end of the class.void
visitField(int access, java.lang.String name, java.lang.String desc, java.lang.Object value)
Visits a field of the class.void
visitInnerClass(java.lang.String name, java.lang.String outerName, java.lang.String innerName, int access)
Visits information about an inner class.CodeVisitor
visitMethod(int access, java.lang.String name, java.lang.String desc, java.lang.String[] exceptions)
Visits a method of the class.
-
-
-
Constructor Detail
-
ClassWriter
public ClassWriter(boolean computeMaxs)
Constructs a newClassWriter
object.- Parameters:
computeMaxs
-true
if the maximum stack size and the maximum number of local variables must be automatically computed. If this flag istrue
, then the arguments of thevisitMaxs
method of theCodeVisitor
returned by thevisitMethod
method will be ignored, and computed automatically from the signature and the bytecode of each method.
-
-
Method Detail
-
visit
public void visit(int access, java.lang.String name, java.lang.String superName, java.lang.String[] interfaces, java.lang.String sourceFile)
Description copied from interface:ClassVisitor
Visits the header of the class.- Specified by:
visit
in interfaceClassVisitor
- Parameters:
access
- the class's access flags (seeConstants
). This parameter also indicates if the class is deprecated.name
- the internal name of the class (seegetInternalName
).superName
- the internal of name of the super class (seegetInternalName
). For interfaces, the super class isObject
. May benull
, but only for thejava.lang.Object
class.interfaces
- the internal names of the class's interfaces (seegetInternalName
). May benull
.sourceFile
- the name of the source file from which this class was compiled. May benull
.
-
visitInnerClass
public void visitInnerClass(java.lang.String name, java.lang.String outerName, java.lang.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.- Specified by:
visitInnerClass
in interfaceClassVisitor
- Parameters:
name
- the internal name of an inner class (seegetInternalName
).outerName
- the internal name of the class to which the inner class belongs (seegetInternalName
). May benull
.innerName
- the (simple) name of the inner class inside its enclosing class. May benull
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, java.lang.String name, java.lang.String desc, java.lang.Object value)
Description copied from interface:ClassVisitor
Visits a field of the class.- Specified by:
visitField
in interfaceClassVisitor
- Parameters:
access
- the field's access flags (seeConstants
). This parameter also indicates if the field is synthetic and/or deprecated.name
- the field's name.desc
- the field's descriptor (seeType
).value
- the field's initial value. This parameter, which may benull
if the field does not have an initial value, must be anInteger
, aFloat
, aLong
, aDouble
or aString
.
-
visitMethod
public CodeVisitor visitMethod(int access, java.lang.String name, java.lang.String desc, java.lang.String[] exceptions)
Description copied from interface:ClassVisitor
Visits a method of the class. This method must return a newCodeVisitor
instance (ornull
) each time it is called, i.e., it should not return a previously returned visitor.- Specified by:
visitMethod
in interfaceClassVisitor
- Parameters:
access
- the method's access flags (seeConstants
). This parameter also indicates if the method is synthetic and/or deprecated.name
- the method's name.desc
- the method's descriptor (seeType
).exceptions
- the internal names of the method's exception classes (seegetInternalName
). May benull
.- Returns:
- 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.
-
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.- Specified by:
visitEnd
in interfaceClassVisitor
-
toByteArray
public byte[] toByteArray()
Returns the bytecode of the class that was build with this class writer.- Returns:
- the bytecode of the class that was build with this class writer.
-
-