Examples of org.jboss.forge.furnace.proxy.javassist.ClassPool

Package org.jboss.forge.furnace.proxy.javassist

Examples of org.jboss.forge.furnace.proxy.javassist.ClassPool

org.jboss.forge.furnace.proxy.javassist.ClassPool
A container of CtClass objects. A CtClass object must be obtained from this object. If get() is called on this object, it searches various sources represented by ClassPath to find a class file and then it creates a CtClass object representing that class file. The created object is returned to the caller.
Memory consumption memo:
ClassPool objects hold all the CtClasses that have been created so that the consistency among modified classes can be guaranteed. Thus if a large number of CtClasses are processed, the ClassPool will consume a huge amount of memory. To avoid this, a ClassPool object should be recreated, for example, every hundred classes processed. Note that getDefault() is a singleton factory. Otherwise, detach() in CtClass should be used to avoid huge memory consumption.
ClassPool hierarchy:
ClassPools can make a parent-child hierarchy as java.lang.ClassLoaders. If a ClassPool has a parent pool, get() first asks the parent pool to find a class file. Only if the parent could not find the class file, get() searches the ClassPaths of the child ClassPool. This search order is reversed if ClassPath.childFirstLookup is true. @see org.jboss.forge.furnace.proxy.javassist.CtClass @see org.jboss.forge.furnace.proxy.javassist.ClassPath

     * includes both the exceptions that the try-catch statements including the
     * expression can catch and the exceptions that the throws declaration
     * allows the method to throw.
     */
    public CtClass[] mayThrow() {
        ClassPool pool = thisClass.getClassPool();
        ConstPool cp = thisMethod.getConstPool();
        LinkedList list = new LinkedList();
        try {
            CodeAttribute ca = thisMethod.getCodeAttribute();
            ExceptionTable et = ca.getExceptionTable();
            int pos = currentPos;
            int n = et.size();
            for (int i = 0; i < n; ++i)
                if (et.startPc(i) <= pos && pos < et.endPc(i)) {
                    int t = et.catchType(i);
                    if (t > 0)
                        try {
                            addClass(list, pool.get(cp.getClassInfo(t)));
                        }
                        catch (NotFoundException e) {
                        }
                }
        }
        catch (NullPointerException e) {
        }


        ExceptionsAttribute ea = thisMethod.getExceptionsAttribute();
        if (ea != null) {
            String[] exceptions = ea.getExceptions();
            if (exceptions != null) {
                int n = exceptions.length;
                for (int i = 0; i < n; ++i)
                    try {
                        addClass(list, pool.get(exceptions[i]));
                    }
                    catch (NotFoundException e) {
                    }
            }
        }

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        if (args.length != 1) {
            System.err.println("Usage: java org.jboss.forge.furnace.proxy.javassist.tools.framedump <class file name>");
            return;
        }
        
        ClassPool pool = ClassPool.getDefault();
        CtClass clazz = pool.get(args[0]);
        System.out.println("Frame Dump of " + clazz.getName() + ":");
        FramePrinter.print(clazz, System.out);
    }

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    private static void processClasses(CompiledClass[] entries, int n)
        throws Exception
    {
        Reflection implementor = new Reflection();
        ClassPool pool = ClassPool.getDefault();
        implementor.start(pool);


        for (int i = 0; i < n; ++i) {
            CtClass c = pool.get(entries[i].classname);
            if (entries[i].metaobject != null
                                        || entries[i].classobject != null) {
                String metaobj, classobj;


                if (entries[i].metaobject == null)
                    metaobj = "org.jboss.forge.furnace.proxy.javassist.tools.reflect.Metaobject";
                else
                    metaobj = entries[i].metaobject;


                if (entries[i].classobject == null)
                    classobj = "org.jboss.forge.furnace.proxy.javassist.tools.reflect.ClassMetaobject";
                else
                    classobj = entries[i].classobject;


                if (!implementor.makeReflective(c, pool.get(metaobj),
                                              pool.get(classobj)))
                    System.err.println("Warning: " + c.getName()
                                + " is reflective.  It was not changed.");


                System.err.println(c.getName() + ": " + metaobj + ", "
                                   + classobj);
            }
            else
                System.err.println(c.getName() + ": not reflective");
        }


        for (int i = 0; i < n; ++i) {
            implementor.onLoad(pool, entries[i].classname);
            pool.get(entries[i].classname).writeFile();
        }
    }

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    public Loader() throws CannotCompileException, NotFoundException {
        super();
        delegateLoadingOf("org.jboss.forge.furnace.proxy.javassist.tools.reflect.Loader");


        reflection = new Reflection();
        ClassPool pool = ClassPool.getDefault();
        addTranslator(pool, reflection);
    }

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        mergeExceptionHandlers(queue, method, pos, frame);
    }


    private ExceptionInfo[] buildExceptionInfo(MethodInfo method) {
        ConstPool constPool = method.getConstPool();
        ClassPool classes = clazz.getClassPool();


        ExceptionTable table = method.getCodeAttribute().getExceptionTable();
        ExceptionInfo[] exceptions = new ExceptionInfo[table.size()];
        for (int i = 0; i < table.size(); i++) {
            int index = table.catchType(i);
            Type type;
            try {
                type = index == 0 ? Type.THROWABLE : Type.get(classes.get(constPool.getClassInfo(index)));
            } catch (NotFoundException e) {
                throw new IllegalStateException(e.getMessage());
            }


            exceptions[i] = new ExceptionInfo(table.startPc(i), table.endPc(i), table.handlerPc(i), type);

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        component = new String(string);
        return component;
    }


    private ClassPool getClassPool(Type rootComponent) {
        ClassPool pool = rootComponent.clazz.getClassPool();
        return pool != null ? pool : ClassPool.getDefault();
    }

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    public CtClass getCtClass() {
        CtClass clazz = component.getCtClass();
        if (clazz == null)
            return null;


        ClassPool pool = clazz.getClassPool();
        if (pool == null)
            pool = ClassPool.getDefault();


        String name = arrayName(clazz.getName(), dims);


        try {
            return pool.get(name);
        } catch (NotFoundException e) {
            throw new RuntimeException(e);
        }
    }

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     * @param src       the source of classs files.
     */
    public AppletServer(int port, ClassPool src)
        throws IOException, NotFoundException, CannotCompileException
    {
        this(new ClassPool(src), new StubGenerator(), port);
    }

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