public Object readObject()

in hessian-lite/src/main/java/com/alibaba/com/caucho/hessian/io/Hessian2Input.java [2221:2410]
133 lines of code
63 McCabe index (conditional complexity)

    public Object readObject(Class cl, Class<?>... expectedTypes)
            throws IOException {
        if (cl == null || cl == Object.class)
            return readObject();

        int tag = _offset < _length ? (_buffer[_offset++] & 0xff) : read();

        switch (tag) {
            case 'N':
                return null;

            case 'H': {
                Deserializer reader = findSerializerFactory().getDeserializer(cl);

                boolean keyValuePair = expectedTypes != null && expectedTypes.length == 2;
                // fix deserialize of short type
                return reader.readMap(this
                        , keyValuePair ? expectedTypes[0] : null
                        , keyValuePair ? expectedTypes[1] : null);
            }

            case 'M': {
                String type = readType();

                // hessian/3bb3
                if ("".equals(type)) {
                    Deserializer reader;
                    reader = findSerializerFactory().getDeserializer(cl);

                    return reader.readMap(this);
                } else {
                    Deserializer reader;
                    reader = findSerializerFactory().getObjectDeserializer(type, cl);

                    return reader.readMap(this);
                }
            }

            case 'C': {
                readObjectDefinition(cl);

                return readObject(cl);
            }

            case 0x60:
            case 0x61:
            case 0x62:
            case 0x63:
            case 0x64:
            case 0x65:
            case 0x66:
            case 0x67:
            case 0x68:
            case 0x69:
            case 0x6a:
            case 0x6b:
            case 0x6c:
            case 0x6d:
            case 0x6e:
            case 0x6f: {
                int ref = tag - 0x60;
                int size = _classDefs.size();

                if (ref < 0 || size <= ref)
                    throw new HessianProtocolException("'" + ref + "' is an unknown class definition");

                ObjectDefinition def = _classDefs.get(ref);

                return readObjectInstance(cl, def);
            }

            case 'O': {
                int ref = readInt();
                int size = _classDefs.size();

                if (ref < 0 || size <= ref)
                    throw new HessianProtocolException("'" + ref + "' is an unknown class definition");

                ObjectDefinition def = _classDefs.get(ref);

                return readObjectInstance(cl, def);
            }

            case BC_LIST_VARIABLE: {
                String type = readType();

                Deserializer reader;
                reader = findSerializerFactory().getListDeserializer(type, cl);

                Object v = reader.readList(this, -1);

                return v;
            }

            case BC_LIST_FIXED: {
                String type = readType();
                int length = readInt();

                Deserializer reader;
                reader = findSerializerFactory().getListDeserializer(type, cl);

                boolean valueType = expectedTypes != null && expectedTypes.length == 1;

                Object v = reader.readLengthList(this, length, valueType ? expectedTypes[0] : null);

                return v;
            }

            case 0x70:
            case 0x71:
            case 0x72:
            case 0x73:
            case 0x74:
            case 0x75:
            case 0x76:
            case 0x77: {
                int length = tag - 0x70;

                String type = readType();

                Deserializer reader;
                reader = findSerializerFactory().getListDeserializer(type, cl);

                boolean valueType = expectedTypes != null && expectedTypes.length == 1;

                // fix deserialize of short type
                Object v = reader.readLengthList(this, length, valueType ? expectedTypes[0] : null);

                return v;
            }

            case BC_LIST_VARIABLE_UNTYPED: {
                Deserializer reader;
                reader = findSerializerFactory().getListDeserializer(null, cl);

                Object v = reader.readList(this, -1);

                return v;
            }

            case BC_LIST_FIXED_UNTYPED: {
                int length = readInt();

                Deserializer reader;
                reader = findSerializerFactory().getListDeserializer(null, cl);

                boolean valueType = expectedTypes != null && expectedTypes.length == 1;

                // fix deserialize of short type
                Object v = reader.readLengthList(this, length, valueType ? expectedTypes[0] : null);

                return v;
            }

            case 0x78:
            case 0x79:
            case 0x7a:
            case 0x7b:
            case 0x7c:
            case 0x7d:
            case 0x7e:
            case 0x7f: {
                int length = tag - 0x78;

                Deserializer reader;
                reader = findSerializerFactory().getListDeserializer(null, cl);

                boolean valueType = expectedTypes != null && expectedTypes.length == 1;

                // fix deserialize of short type
                Object v = reader.readLengthList(this, length, valueType ? expectedTypes[0] : null);

                return v;
            }

            case BC_REF: {
                int ref = readInt();

                return _refs.get(ref);
            }
        }

        if (tag >= 0)
            _offset--;

        // hessian/3b2i vs hessian/3406
        // return readObject();
        Object value = findSerializerFactory().getDeserializer(cl).readObject(this);
        return value;
    }