Package org.apache.bcel.util

Class BCELifier

java.lang.Object

org.apache.bcel.classfile.EmptyVisitor

org.apache.bcel.util.BCELifier

All Implemented Interfaces:

Visitor

public class BCELifier
extends EmptyVisitor

This class takes a given JavaClass object and converts it to a Java program that creates that very class using BCEL. This gives new users of BCEL a useful example showing how things are done with BCEL. It does not cover all features of BCEL, but tries to mimic hand-written code as close as possible.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	BCELifier.FLAGS	Enum corresponding to flag source.

Field Summary

Fields

Modifier and Type	Field	Description
private final JavaClass	_clazz
private final ConstantPoolGen	_cp
private final PrintWriter	_out
private static final String	BASE_PACKAGE
private static final String	CONSTANT_PREFIX

Constructor Summary

Constructors

Constructor	Description
BCELifier(JavaClass clazz, OutputStream out)

Method Summary

Modifier and Type	Method	Description
(package private) static JavaClass	getJavaClass(String name)
static void	main(String[] argv)	Default main method
(package private) static String	printArgumentTypes(Type[] arg_types)
private void	printCreate()
(package private) static String	printFlags(int flags)
static String	printFlags(int flags, BCELifier.FLAGS location)	Return a string with the flag settings
private void	printMain()
(package private) static String	printType(String signature)
(package private) static String	printType(Type type)
void	start()	Start Java code generation
void	visitField(Field field)
void	visitJavaClass(JavaClass clazz)
void	visitMethod(Method method)

Methods inherited from class org.apache.bcel.classfile.EmptyVisitor

visitAnnotation, visitAnnotationDefault, visitAnnotationEntry, visitBootstrapMethods, visitCode, visitCodeException, visitConstantClass, visitConstantDouble, visitConstantDynamic, visitConstantFieldref, visitConstantFloat, visitConstantInteger, visitConstantInterfaceMethodref, visitConstantInvokeDynamic, visitConstantLong, visitConstantMethodHandle, visitConstantMethodref, visitConstantMethodType, visitConstantModule, visitConstantNameAndType, visitConstantPackage, visitConstantPool, visitConstantString, visitConstantUtf8, visitConstantValue, visitDeprecated, visitEnclosingMethod, visitExceptionTable, visitInnerClass, visitInnerClasses, visitLineNumber, visitLineNumberTable, visitLocalVariable, visitLocalVariableTable, visitLocalVariableTypeTable, visitMethodParameter, visitMethodParameters, visitModule, visitModuleExports, visitModuleMainClass, visitModuleOpens, visitModulePackages, visitModuleProvides, visitModuleRequires, visitNestHost, visitNestMembers, visitParameterAnnotation, visitParameterAnnotationEntry, visitSignature, visitSourceFile, visitStackMap, visitStackMapEntry, visitSynthetic, visitUnknown

Methods inherited from class java.lang.Object

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

Field Details

BASE_PACKAGE

private static final String BASE_PACKAGE

CONSTANT_PREFIX

private static final String CONSTANT_PREFIX

_clazz

private final JavaClass _clazz

_out

private final PrintWriter _out

_cp

private final ConstantPoolGen _cp

Constructor Details

BCELifier

public BCELifier(JavaClass clazz,
 OutputStream out)

Parameters:

clazz - Java class to "decompile"

out - where to output Java program

Method Details

start

public void start()

Start Java code generation

visitJavaClass

public void visitJavaClass(JavaClass clazz)

Specified by:

visitJavaClass in interface Visitor

Overrides:

visitJavaClass in class EmptyVisitor

printCreate

private void printCreate()

printMain

private void printMain()

visitField

public void visitField(Field field)

Specified by:

visitField in interface Visitor

Overrides:

visitField in class EmptyVisitor

visitMethod

public void visitMethod(Method method)

Specified by:

visitMethod in interface Visitor

Overrides:

visitMethod in class EmptyVisitor

printFlags

static String printFlags(int flags)

printFlags

public static String printFlags(int flags,
 BCELifier.FLAGS location)

Return a string with the flag settings

Parameters:

flags - the flags field to interpret

location - the item type

Returns:

the formatted string

Since:

6.0 made public

printArgumentTypes

static String printArgumentTypes(Type[] arg_types)

printType

static String printType(Type type)

printType

static String printType(String signature)

main

public static void main(String[] argv)
                 throws Exception

Default main method

Throws:

Exception

getJavaClass

static JavaClass getJavaClass(String name)
                       throws ClassNotFoundException,
IOException

Throws:

ClassNotFoundException

IOException