Examples of org.apache.xbean.asm4.ClassReader

org.apache.xbean.asm5.ClassReader
A Java class parser to make a Class Visitor visit an existing class. This class parses a byte array conforming to the Java class file format and calls the appropriate visit methods of a given class visitor for each field, method and bytecode instruction encountered. @author Eric Bruneton @author Eugene Kuleshov

        }
    }


    private static void copyClassAnnotations(final Class<?> clazz, final ClassVisitor newClass) throws ProxyGenerationException {
        try {
            final ClassReader classReader = new ClassReader(readClassFile(clazz));
            final ClassVisitor visitor = new CopyClassAnnotations(newClass);
            classReader.accept(visitor, ClassReader.SKIP_CODE);
        } catch (final IOException e) {
            throw new ProxyGenerationException(e);
        }
    }

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     * Fast-parse the given class bytecode to determine if it is an
     * enum class.
     */
    private static boolean isEnum(final byte[] bytes) {
        final IsEnumVisitor isEnumVisitor = new IsEnumVisitor();
        final ClassReader classReader = new ClassReader(bytes);
        classReader.accept(isEnumVisitor, ClassReader.SKIP_DEBUG);
        return isEnumVisitor.isEnum;
    }

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     * Fast-parse the given class bytecode to determine if it is an
     * annotation class.
     */
    private static boolean isAnnotationClass(final byte[] bytes) {
        final IsAnnotationVisitor isAnnotationVisitor = new IsAnnotationVisitor();
        final ClassReader classReader = new ClassReader(bytes);
        classReader.accept(isAnnotationVisitor, ClassReader.SKIP_DEBUG);
        return isAnnotationVisitor.isAnnotation;
    }

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        }


        // Load the parameter names using ASM
        Map<Constructor,List<String>> constructorParameters = new HashMap<Constructor,List<String>> ();
        try {
            ClassReader reader = XbeanAsmParameterNameLoader.createClassReader(clazz);


            XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor visitor = new XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor(clazz);
            reader.accept(visitor, 0);


            Map exceptions = visitor.getExceptions();
            if (exceptions.size() == 1) {
                throw new RuntimeException((Exception)exceptions.values().iterator().next());
            }

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        }


        // Load the parameter names using ASM
        Map<Method,List<String>>  methodParameters = new HashMap<Method,List<String>>();
        try {
            ClassReader reader = XbeanAsmParameterNameLoader.createClassReader(clazz);


            XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor visitor = new XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor(clazz, methodName);
            reader.accept(visitor, 0);


            Map exceptions = visitor.getExceptions();
            if (exceptions.size() == 1) {
                throw new RuntimeException((Exception)exceptions.values().iterator().next());
            }

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    private static ClassReader createClassReader(Class declaringClass) throws IOException {
        InputStream in = null;
        try {
            ClassLoader classLoader = declaringClass.getClassLoader();
            in = classLoader.getResourceAsStream(declaringClass.getName().replace('.', '/') + ".class");
            ClassReader reader = new ClassReader(in);
            return reader;
        } finally {
            if (in != null) {
                try {
                    in.close();

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        // Move all the annotations onto the newly implemented methods
        // Ensures CDI and JAX-RS and JAX-WS still work
        Class clazz = classToProxy;
        while (clazz != null && !clazz.equals(Object.class)) {
            try {
                final ClassReader classReader = new ClassReader(readClassFile(clazz));
                final ClassVisitor copyMethodAnnotations = new CopyMethodAnnotations(visitors);
                classReader.accept(copyMethodAnnotations, ClassReader.SKIP_CODE);
            } catch (final IOException e) {
                throw new ProxyGenerationException(e);
            }
            clazz = clazz.getSuperclass();
        }

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        }
    }


    private static void copyClassAnnotations(final Class<?> clazz, final ClassVisitor newClass) throws ProxyGenerationException {
        try {
            final ClassReader classReader = new ClassReader(readClassFile(clazz));
            final ClassVisitor visitor = new CopyClassAnnotations(newClass);
            classReader.accept(visitor, ClassReader.SKIP_CODE);
        } catch (final IOException e) {
            throw new ProxyGenerationException(e);
        }
    }

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     * Fast-parse the given class bytecode to determine if it is an
     * enum class.
     */
    private static boolean isEnum(final byte[] bytes) {
        final IsEnumVisitor isEnumVisitor = new IsEnumVisitor();
        final ClassReader classReader = new ClassReader(bytes);
        classReader.accept(isEnumVisitor, ClassReader.SKIP_DEBUG);
        return isEnumVisitor.isEnum;
    }

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     * Fast-parse the given class bytecode to determine if it is an
     * annotation class.
     */
    private static boolean isAnnotationClass(final byte[] bytes) {
        final IsAnnotationVisitor isAnnotationVisitor = new IsAnnotationVisitor();
        final ClassReader classReader = new ClassReader(bytes);
        classReader.accept(isAnnotationVisitor, ClassReader.SKIP_DEBUG);
        return isAnnotationVisitor.isAnnotation;
    }

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