| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| from __future__ import absolute_import |
| |
| import uuid |
| |
| from cproton import PN_TIMESTAMP, PN_FLOAT, PN_DESCRIBED, PN_DECIMAL64, PN_UBYTE, PN_UUID, PN_NULL, PN_BINARY, \ |
| PN_LIST, PN_OVERFLOW, PN_MAP, PN_LONG, PN_SHORT, PN_CHAR, PN_UINT, PN_ULONG, PN_STRING, PN_USHORT, PN_DOUBLE, \ |
| PN_BYTE, PN_DECIMAL32, PN_DECIMAL128, PN_ARRAY, PN_SYMBOL, PN_BOOL, PN_INT, \ |
| pn_data_get_binary, pn_data_get_decimal64, pn_data_put_symbol, pn_data_put_float, \ |
| pn_data_is_array_described, pn_data_exit, pn_data_put_uint, pn_data_put_decimal128, \ |
| pn_data_lookup, pn_data_put_char, pn_data_encoded_size, pn_data_get_bool, \ |
| pn_data_get_short, pn_data_prev, pn_data_type, pn_data_widen, pn_data_put_decimal64, \ |
| pn_data_put_string, pn_data_get_array, pn_data_put_ulong, pn_data_get_byte, pn_data_get_symbol, pn_data_encode, \ |
| pn_data_rewind, pn_data_put_bool, pn_data_is_null, pn_data_error, \ |
| pn_data_put_double, pn_data_copy, pn_data_put_int, pn_data_get_ubyte, pn_data_free, pn_data_clear, \ |
| pn_data_get_double, pn_data_put_byte, pn_data_put_uuid, pn_data_put_ushort, pn_data_is_described, \ |
| pn_data_get_float, pn_data_get_uint, pn_data_put_described, pn_data_get_decimal128, pn_data, \ |
| pn_data_get_array_type, pn_data_put_map, pn_data_put_list, pn_data_get_string, pn_data_get_char, \ |
| pn_data_put_decimal32, pn_data_enter, pn_data_put_short, pn_data_put_timestamp, \ |
| pn_data_get_long, pn_data_get_map, pn_data_narrow, pn_data_put_array, pn_data_get_ushort, \ |
| pn_data_get_int, pn_data_get_list, pn_data_get_ulong, pn_data_put_ubyte, \ |
| pn_data_format, pn_data_dump, pn_data_get_uuid, pn_data_get_decimal32, \ |
| pn_data_put_binary, pn_data_get_timestamp, pn_data_decode, pn_data_next, pn_data_put_null, pn_data_put_long, \ |
| pn_error_text |
| |
| from ._common import Constant |
| from ._exceptions import EXCEPTIONS, DataException |
| |
| from . import _compat |
| |
| # |
| # Hacks to provide Python2 <---> Python3 compatibility |
| # |
| # The results are |
| # | |long|unicode| |
| # |python2|long|unicode| |
| # |python3| int| str| |
| try: |
| long() |
| except NameError: |
| long = int |
| try: |
| unicode() |
| except NameError: |
| unicode = str |
| |
| |
| class UnmappedType: |
| |
| def __init__(self, msg): |
| self.msg = msg |
| |
| def __repr__(self): |
| return "UnmappedType(%s)" % self.msg |
| |
| |
| class ulong(long): |
| |
| def __repr__(self): |
| return "ulong(%s)" % long.__repr__(self) |
| |
| |
| class timestamp(long): |
| |
| def __repr__(self): |
| return "timestamp(%s)" % long.__repr__(self) |
| |
| |
| class symbol(unicode): |
| |
| def __repr__(self): |
| return "symbol(%s)" % unicode.__repr__(self) |
| |
| |
| class char(unicode): |
| |
| def __repr__(self): |
| return "char(%s)" % unicode.__repr__(self) |
| |
| |
| class byte(int): |
| |
| def __repr__(self): |
| return "byte(%s)" % int.__repr__(self) |
| |
| |
| class short(int): |
| |
| def __repr__(self): |
| return "short(%s)" % int.__repr__(self) |
| |
| |
| class int32(int): |
| |
| def __repr__(self): |
| return "int32(%s)" % int.__repr__(self) |
| |
| |
| class ubyte(int): |
| |
| def __repr__(self): |
| return "ubyte(%s)" % int.__repr__(self) |
| |
| |
| class ushort(int): |
| |
| def __repr__(self): |
| return "ushort(%s)" % int.__repr__(self) |
| |
| |
| class uint(long): |
| |
| def __repr__(self): |
| return "uint(%s)" % long.__repr__(self) |
| |
| |
| class float32(float): |
| |
| def __repr__(self): |
| return "float32(%s)" % float.__repr__(self) |
| |
| |
| class decimal32(int): |
| |
| def __repr__(self): |
| return "decimal32(%s)" % int.__repr__(self) |
| |
| |
| class decimal64(long): |
| |
| def __repr__(self): |
| return "decimal64(%s)" % long.__repr__(self) |
| |
| |
| class decimal128(bytes): |
| |
| def __repr__(self): |
| return "decimal128(%s)" % bytes.__repr__(self) |
| |
| |
| class Described(object): |
| |
| def __init__(self, descriptor, value): |
| self.descriptor = descriptor |
| self.value = value |
| |
| def __repr__(self): |
| return "Described(%r, %r)" % (self.descriptor, self.value) |
| |
| def __eq__(self, o): |
| if isinstance(o, Described): |
| return self.descriptor == o.descriptor and self.value == o.value |
| else: |
| return False |
| |
| |
| UNDESCRIBED = Constant("UNDESCRIBED") |
| |
| |
| class Array(object): |
| |
| def __init__(self, descriptor, type, *elements): |
| self.descriptor = descriptor |
| self.type = type |
| self.elements = elements |
| |
| def __iter__(self): |
| return iter(self.elements) |
| |
| def __repr__(self): |
| if self.elements: |
| els = ", %s" % (", ".join(map(repr, self.elements))) |
| else: |
| els = "" |
| return "Array(%r, %r%s)" % (self.descriptor, self.type, els) |
| |
| def __eq__(self, o): |
| if isinstance(o, Array): |
| return self.descriptor == o.descriptor and \ |
| self.type == o.type and self.elements == o.elements |
| else: |
| return False |
| |
| |
| class Data: |
| """ |
| The L{Data} class provides an interface for decoding, extracting, |
| creating, and encoding arbitrary AMQP data. A L{Data} object |
| contains a tree of AMQP values. Leaf nodes in this tree correspond |
| to scalars in the AMQP type system such as L{ints<INT>} or |
| L{strings<STRING>}. Non-leaf nodes in this tree correspond to |
| compound values in the AMQP type system such as L{lists<LIST>}, |
| L{maps<MAP>}, L{arrays<ARRAY>}, or L{described values<DESCRIBED>}. |
| The root node of the tree is the L{Data} object itself and can have |
| an arbitrary number of children. |
| |
| A L{Data} object maintains the notion of the current sibling node |
| and a current parent node. Siblings are ordered within their parent. |
| Values are accessed and/or added by using the L{next}, L{prev}, |
| L{enter}, and L{exit} methods to navigate to the desired location in |
| the tree and using the supplied variety of put_*/get_* methods to |
| access or add a value of the desired type. |
| |
| The put_* methods will always add a value I{after} the current node |
| in the tree. If the current node has a next sibling the put_* method |
| will overwrite the value on this node. If there is no current node |
| or the current node has no next sibling then one will be added. The |
| put_* methods always set the added/modified node to the current |
| node. The get_* methods read the value of the current node and do |
| not change which node is current. |
| |
| The following types of scalar values are supported: |
| |
| - L{NULL} |
| - L{BOOL} |
| - L{UBYTE} |
| - L{USHORT} |
| - L{SHORT} |
| - L{UINT} |
| - L{INT} |
| - L{ULONG} |
| - L{LONG} |
| - L{FLOAT} |
| - L{DOUBLE} |
| - L{BINARY} |
| - L{STRING} |
| - L{SYMBOL} |
| |
| The following types of compound values are supported: |
| |
| - L{DESCRIBED} |
| - L{ARRAY} |
| - L{LIST} |
| - L{MAP} |
| """ |
| |
| NULL = PN_NULL; "A null value." |
| BOOL = PN_BOOL; "A boolean value." |
| UBYTE = PN_UBYTE; "An unsigned byte value." |
| BYTE = PN_BYTE; "A signed byte value." |
| USHORT = PN_USHORT; "An unsigned short value." |
| SHORT = PN_SHORT; "A short value." |
| UINT = PN_UINT; "An unsigned int value." |
| INT = PN_INT; "A signed int value." |
| CHAR = PN_CHAR; "A character value." |
| ULONG = PN_ULONG; "An unsigned long value." |
| LONG = PN_LONG; "A signed long value." |
| TIMESTAMP = PN_TIMESTAMP; "A timestamp value." |
| FLOAT = PN_FLOAT; "A float value." |
| DOUBLE = PN_DOUBLE; "A double value." |
| DECIMAL32 = PN_DECIMAL32; "A DECIMAL32 value." |
| DECIMAL64 = PN_DECIMAL64; "A DECIMAL64 value." |
| DECIMAL128 = PN_DECIMAL128; "A DECIMAL128 value." |
| UUID = PN_UUID; "A UUID value." |
| BINARY = PN_BINARY; "A binary string." |
| STRING = PN_STRING; "A unicode string." |
| SYMBOL = PN_SYMBOL; "A symbolic string." |
| DESCRIBED = PN_DESCRIBED; "A described value." |
| ARRAY = PN_ARRAY; "An array value." |
| LIST = PN_LIST; "A list value." |
| MAP = PN_MAP; "A map value." |
| |
| type_names = { |
| NULL: "null", |
| BOOL: "bool", |
| BYTE: "byte", |
| UBYTE: "ubyte", |
| SHORT: "short", |
| USHORT: "ushort", |
| INT: "int", |
| UINT: "uint", |
| CHAR: "char", |
| LONG: "long", |
| ULONG: "ulong", |
| TIMESTAMP: "timestamp", |
| FLOAT: "float", |
| DOUBLE: "double", |
| DECIMAL32: "decimal32", |
| DECIMAL64: "decimal64", |
| DECIMAL128: "decimal128", |
| UUID: "uuid", |
| BINARY: "binary", |
| STRING: "string", |
| SYMBOL: "symbol", |
| DESCRIBED: "described", |
| ARRAY: "array", |
| LIST: "list", |
| MAP: "map" |
| } |
| |
| @classmethod |
| def type_name(type): |
| return Data.type_names[type] |
| |
| def __init__(self, capacity=16): |
| if isinstance(capacity, (int, long)): |
| self._data = pn_data(capacity) |
| self._free = True |
| else: |
| self._data = capacity |
| self._free = False |
| |
| def __del__(self): |
| if self._free and hasattr(self, "_data"): |
| pn_data_free(self._data) |
| del self._data |
| |
| def _check(self, err): |
| if err < 0: |
| exc = EXCEPTIONS.get(err, DataException) |
| raise exc("[%s]: %s" % (err, pn_error_text(pn_data_error(self._data)))) |
| else: |
| return err |
| |
| def clear(self): |
| """ |
| Clears the data object. |
| """ |
| pn_data_clear(self._data) |
| |
| def rewind(self): |
| """ |
| Clears current node and sets the parent to the root node. Clearing the |
| current node sets it _before_ the first node, calling next() will advance to |
| the first node. |
| """ |
| assert self._data is not None |
| pn_data_rewind(self._data) |
| |
| def next(self): |
| """ |
| Advances the current node to its next sibling and returns its |
| type. If there is no next sibling the current node remains |
| unchanged and None is returned. |
| """ |
| found = pn_data_next(self._data) |
| if found: |
| return self.type() |
| else: |
| return None |
| |
| def prev(self): |
| """ |
| Advances the current node to its previous sibling and returns its |
| type. If there is no previous sibling the current node remains |
| unchanged and None is returned. |
| """ |
| found = pn_data_prev(self._data) |
| if found: |
| return self.type() |
| else: |
| return None |
| |
| def enter(self): |
| """ |
| Sets the parent node to the current node and clears the current node. |
| Clearing the current node sets it _before_ the first child, |
| call next() advances to the first child. |
| """ |
| return pn_data_enter(self._data) |
| |
| def exit(self): |
| """ |
| Sets the current node to the parent node and the parent node to |
| its own parent. |
| """ |
| return pn_data_exit(self._data) |
| |
| def lookup(self, name): |
| return pn_data_lookup(self._data, name) |
| |
| def narrow(self): |
| pn_data_narrow(self._data) |
| |
| def widen(self): |
| pn_data_widen(self._data) |
| |
| def type(self): |
| """ |
| Returns the type of the current node. |
| """ |
| dtype = pn_data_type(self._data) |
| if dtype == -1: |
| return None |
| else: |
| return dtype |
| |
| def encoded_size(self): |
| """ |
| Returns the size in bytes needed to encode the data in AMQP format. |
| """ |
| return pn_data_encoded_size(self._data) |
| |
| def encode(self): |
| """ |
| Returns a representation of the data encoded in AMQP format. |
| """ |
| size = 1024 |
| while True: |
| cd, enc = pn_data_encode(self._data, size) |
| if cd == PN_OVERFLOW: |
| size *= 2 |
| elif cd >= 0: |
| return enc |
| else: |
| self._check(cd) |
| |
| def decode(self, encoded): |
| """ |
| Decodes the first value from supplied AMQP data and returns the |
| number of bytes consumed. |
| |
| @type encoded: binary |
| @param encoded: AMQP encoded binary data |
| """ |
| return self._check(pn_data_decode(self._data, encoded)) |
| |
| def put_list(self): |
| """ |
| Puts a list value. Elements may be filled by entering the list |
| node and putting element values. |
| |
| >>> data = Data() |
| >>> data.put_list() |
| >>> data.enter() |
| >>> data.put_int(1) |
| >>> data.put_int(2) |
| >>> data.put_int(3) |
| >>> data.exit() |
| """ |
| self._check(pn_data_put_list(self._data)) |
| |
| def put_map(self): |
| """ |
| Puts a map value. Elements may be filled by entering the map node |
| and putting alternating key value pairs. |
| |
| >>> data = Data() |
| >>> data.put_map() |
| >>> data.enter() |
| >>> data.put_string("key") |
| >>> data.put_string("value") |
| >>> data.exit() |
| """ |
| self._check(pn_data_put_map(self._data)) |
| |
| def put_array(self, described, element_type): |
| """ |
| Puts an array value. Elements may be filled by entering the array |
| node and putting the element values. The values must all be of the |
| specified array element type. If an array is described then the |
| first child value of the array is the descriptor and may be of any |
| type. |
| |
| >>> data = Data() |
| >>> |
| >>> data.put_array(False, Data.INT) |
| >>> data.enter() |
| >>> data.put_int(1) |
| >>> data.put_int(2) |
| >>> data.put_int(3) |
| >>> data.exit() |
| >>> |
| >>> data.put_array(True, Data.DOUBLE) |
| >>> data.enter() |
| >>> data.put_symbol("array-descriptor") |
| >>> data.put_double(1.1) |
| >>> data.put_double(1.2) |
| >>> data.put_double(1.3) |
| >>> data.exit() |
| |
| @type described: bool |
| @param described: specifies whether the array is described |
| @type element_type: int |
| @param element_type: the type of the array elements |
| """ |
| self._check(pn_data_put_array(self._data, described, element_type)) |
| |
| def put_described(self): |
| """ |
| Puts a described value. A described node has two children, the |
| descriptor and the value. These are specified by entering the node |
| and putting the desired values. |
| |
| >>> data = Data() |
| >>> data.put_described() |
| >>> data.enter() |
| >>> data.put_symbol("value-descriptor") |
| >>> data.put_string("the value") |
| >>> data.exit() |
| """ |
| self._check(pn_data_put_described(self._data)) |
| |
| def put_null(self): |
| """ |
| Puts a null value. |
| """ |
| self._check(pn_data_put_null(self._data)) |
| |
| def put_bool(self, b): |
| """ |
| Puts a boolean value. |
| |
| @param b: a boolean value |
| """ |
| self._check(pn_data_put_bool(self._data, b)) |
| |
| def put_ubyte(self, ub): |
| """ |
| Puts an unsigned byte value. |
| |
| @param ub: an integral value |
| """ |
| self._check(pn_data_put_ubyte(self._data, ub)) |
| |
| def put_byte(self, b): |
| """ |
| Puts a signed byte value. |
| |
| @param b: an integral value |
| """ |
| self._check(pn_data_put_byte(self._data, b)) |
| |
| def put_ushort(self, us): |
| """ |
| Puts an unsigned short value. |
| |
| @param us: an integral value. |
| """ |
| self._check(pn_data_put_ushort(self._data, us)) |
| |
| def put_short(self, s): |
| """ |
| Puts a signed short value. |
| |
| @param s: an integral value |
| """ |
| self._check(pn_data_put_short(self._data, s)) |
| |
| def put_uint(self, ui): |
| """ |
| Puts an unsigned int value. |
| |
| @param ui: an integral value |
| """ |
| self._check(pn_data_put_uint(self._data, ui)) |
| |
| def put_int(self, i): |
| """ |
| Puts a signed int value. |
| |
| @param i: an integral value |
| """ |
| self._check(pn_data_put_int(self._data, i)) |
| |
| def put_char(self, c): |
| """ |
| Puts a char value. |
| |
| @param c: a single character |
| """ |
| self._check(pn_data_put_char(self._data, ord(c))) |
| |
| def put_ulong(self, ul): |
| """ |
| Puts an unsigned long value. |
| |
| @param ul: an integral value |
| """ |
| self._check(pn_data_put_ulong(self._data, ul)) |
| |
| def put_long(self, l): |
| """ |
| Puts a signed long value. |
| |
| @param l: an integral value |
| """ |
| self._check(pn_data_put_long(self._data, l)) |
| |
| def put_timestamp(self, t): |
| """ |
| Puts a timestamp value. |
| |
| @param t: an integral value |
| """ |
| self._check(pn_data_put_timestamp(self._data, t)) |
| |
| def put_float(self, f): |
| """ |
| Puts a float value. |
| |
| @param f: a floating point value |
| """ |
| self._check(pn_data_put_float(self._data, f)) |
| |
| def put_double(self, d): |
| """ |
| Puts a double value. |
| |
| @param d: a floating point value. |
| """ |
| self._check(pn_data_put_double(self._data, d)) |
| |
| def put_decimal32(self, d): |
| """ |
| Puts a decimal32 value. |
| |
| @param d: a decimal32 value |
| """ |
| self._check(pn_data_put_decimal32(self._data, d)) |
| |
| def put_decimal64(self, d): |
| """ |
| Puts a decimal64 value. |
| |
| @param d: a decimal64 value |
| """ |
| self._check(pn_data_put_decimal64(self._data, d)) |
| |
| def put_decimal128(self, d): |
| """ |
| Puts a decimal128 value. |
| |
| @param d: a decimal128 value |
| """ |
| self._check(pn_data_put_decimal128(self._data, d)) |
| |
| def put_uuid(self, u): |
| """ |
| Puts a UUID value. |
| |
| @param u: a uuid value |
| """ |
| self._check(pn_data_put_uuid(self._data, u.bytes)) |
| |
| def put_binary(self, b): |
| """ |
| Puts a binary value. |
| |
| @type b: binary |
| @param b: a binary value |
| """ |
| self._check(pn_data_put_binary(self._data, b)) |
| |
| def put_memoryview(self, mv): |
| """Put a python memoryview object as an AMQP binary value""" |
| self.put_binary(mv.tobytes()) |
| |
| def put_buffer(self, buff): |
| """Put a python buffer object as an AMQP binary value""" |
| self.put_binary(bytes(buff)) |
| |
| def put_string(self, s): |
| """ |
| Puts a unicode value. |
| |
| @type s: unicode |
| @param s: a unicode value |
| """ |
| self._check(pn_data_put_string(self._data, s.encode("utf8"))) |
| |
| def put_symbol(self, s): |
| """ |
| Puts a symbolic value. |
| |
| @type s: string |
| @param s: the symbol name |
| """ |
| self._check(pn_data_put_symbol(self._data, s.encode('ascii'))) |
| |
| def get_list(self): |
| """ |
| If the current node is a list, return the number of elements, |
| otherwise return zero. List elements can be accessed by entering |
| the list. |
| |
| >>> count = data.get_list() |
| >>> data.enter() |
| >>> for i in range(count): |
| ... type = data.next() |
| ... if type == Data.STRING: |
| ... print data.get_string() |
| ... elif type == ...: |
| ... ... |
| >>> data.exit() |
| """ |
| return pn_data_get_list(self._data) |
| |
| def get_map(self): |
| """ |
| If the current node is a map, return the number of child elements, |
| otherwise return zero. Key value pairs can be accessed by entering |
| the map. |
| |
| >>> count = data.get_map() |
| >>> data.enter() |
| >>> for i in range(count/2): |
| ... type = data.next() |
| ... if type == Data.STRING: |
| ... print data.get_string() |
| ... elif type == ...: |
| ... ... |
| >>> data.exit() |
| """ |
| return pn_data_get_map(self._data) |
| |
| def get_array(self): |
| """ |
| If the current node is an array, return a tuple of the element |
| count, a boolean indicating whether the array is described, and |
| the type of each element, otherwise return (0, False, None). Array |
| data can be accessed by entering the array. |
| |
| >>> # read an array of strings with a symbolic descriptor |
| >>> count, described, type = data.get_array() |
| >>> data.enter() |
| >>> data.next() |
| >>> print "Descriptor:", data.get_symbol() |
| >>> for i in range(count): |
| ... data.next() |
| ... print "Element:", data.get_string() |
| >>> data.exit() |
| """ |
| count = pn_data_get_array(self._data) |
| described = pn_data_is_array_described(self._data) |
| type = pn_data_get_array_type(self._data) |
| if type == -1: |
| type = None |
| return count, described, type |
| |
| def is_described(self): |
| """ |
| Checks if the current node is a described value. The descriptor |
| and value may be accessed by entering the described value. |
| |
| >>> # read a symbolically described string |
| >>> assert data.is_described() # will error if the current node is not described |
| >>> data.enter() |
| >>> data.next() |
| >>> print data.get_symbol() |
| >>> data.next() |
| >>> print data.get_string() |
| >>> data.exit() |
| """ |
| return pn_data_is_described(self._data) |
| |
| def is_null(self): |
| """ |
| Checks if the current node is a null. |
| """ |
| return pn_data_is_null(self._data) |
| |
| def get_bool(self): |
| """ |
| If the current node is a boolean, returns its value, returns False |
| otherwise. |
| """ |
| return pn_data_get_bool(self._data) |
| |
| def get_ubyte(self): |
| """ |
| If the current node is an unsigned byte, returns its value, |
| returns 0 otherwise. |
| """ |
| return ubyte(pn_data_get_ubyte(self._data)) |
| |
| def get_byte(self): |
| """ |
| If the current node is a signed byte, returns its value, returns 0 |
| otherwise. |
| """ |
| return byte(pn_data_get_byte(self._data)) |
| |
| def get_ushort(self): |
| """ |
| If the current node is an unsigned short, returns its value, |
| returns 0 otherwise. |
| """ |
| return ushort(pn_data_get_ushort(self._data)) |
| |
| def get_short(self): |
| """ |
| If the current node is a signed short, returns its value, returns |
| 0 otherwise. |
| """ |
| return short(pn_data_get_short(self._data)) |
| |
| def get_uint(self): |
| """ |
| If the current node is an unsigned int, returns its value, returns |
| 0 otherwise. |
| """ |
| return uint(pn_data_get_uint(self._data)) |
| |
| def get_int(self): |
| """ |
| If the current node is a signed int, returns its value, returns 0 |
| otherwise. |
| """ |
| return int32(pn_data_get_int(self._data)) |
| |
| def get_char(self): |
| """ |
| If the current node is a char, returns its value, returns 0 |
| otherwise. |
| """ |
| return char(_compat.unichr(pn_data_get_char(self._data))) |
| |
| def get_ulong(self): |
| """ |
| If the current node is an unsigned long, returns its value, |
| returns 0 otherwise. |
| """ |
| return ulong(pn_data_get_ulong(self._data)) |
| |
| def get_long(self): |
| """ |
| If the current node is an signed long, returns its value, returns |
| 0 otherwise. |
| """ |
| return long(pn_data_get_long(self._data)) |
| |
| def get_timestamp(self): |
| """ |
| If the current node is a timestamp, returns its value, returns 0 |
| otherwise. |
| """ |
| return timestamp(pn_data_get_timestamp(self._data)) |
| |
| def get_float(self): |
| """ |
| If the current node is a float, returns its value, raises 0 |
| otherwise. |
| """ |
| return float32(pn_data_get_float(self._data)) |
| |
| def get_double(self): |
| """ |
| If the current node is a double, returns its value, returns 0 |
| otherwise. |
| """ |
| return pn_data_get_double(self._data) |
| |
| # XXX: need to convert |
| def get_decimal32(self): |
| """ |
| If the current node is a decimal32, returns its value, returns 0 |
| otherwise. |
| """ |
| return decimal32(pn_data_get_decimal32(self._data)) |
| |
| # XXX: need to convert |
| def get_decimal64(self): |
| """ |
| If the current node is a decimal64, returns its value, returns 0 |
| otherwise. |
| """ |
| return decimal64(pn_data_get_decimal64(self._data)) |
| |
| # XXX: need to convert |
| def get_decimal128(self): |
| """ |
| If the current node is a decimal128, returns its value, returns 0 |
| otherwise. |
| """ |
| return decimal128(pn_data_get_decimal128(self._data)) |
| |
| def get_uuid(self): |
| """ |
| If the current node is a UUID, returns its value, returns None |
| otherwise. |
| """ |
| if pn_data_type(self._data) == Data.UUID: |
| return uuid.UUID(bytes=pn_data_get_uuid(self._data)) |
| else: |
| return None |
| |
| def get_binary(self): |
| """ |
| If the current node is binary, returns its value, returns "" |
| otherwise. |
| """ |
| return pn_data_get_binary(self._data) |
| |
| def get_string(self): |
| """ |
| If the current node is a string, returns its value, returns "" |
| otherwise. |
| """ |
| return pn_data_get_string(self._data).decode("utf8") |
| |
| def get_symbol(self): |
| """ |
| If the current node is a symbol, returns its value, returns "" |
| otherwise. |
| """ |
| return symbol(pn_data_get_symbol(self._data).decode('ascii')) |
| |
| def copy(self, src): |
| self._check(pn_data_copy(self._data, src._data)) |
| |
| def format(self): |
| sz = 16 |
| while True: |
| err, result = pn_data_format(self._data, sz) |
| if err == PN_OVERFLOW: |
| sz *= 2 |
| continue |
| else: |
| self._check(err) |
| return result |
| |
| def dump(self): |
| pn_data_dump(self._data) |
| |
| def put_dict(self, d): |
| self.put_map() |
| self.enter() |
| try: |
| for k, v in d.items(): |
| self.put_object(k) |
| self.put_object(v) |
| finally: |
| self.exit() |
| |
| def get_dict(self): |
| if self.enter(): |
| try: |
| result = {} |
| while self.next(): |
| k = self.get_object() |
| if self.next(): |
| v = self.get_object() |
| else: |
| v = None |
| result[k] = v |
| finally: |
| self.exit() |
| return result |
| |
| def put_sequence(self, s): |
| self.put_list() |
| self.enter() |
| try: |
| for o in s: |
| self.put_object(o) |
| finally: |
| self.exit() |
| |
| def get_sequence(self): |
| if self.enter(): |
| try: |
| result = [] |
| while self.next(): |
| result.append(self.get_object()) |
| finally: |
| self.exit() |
| return result |
| |
| def get_py_described(self): |
| if self.enter(): |
| try: |
| self.next() |
| descriptor = self.get_object() |
| self.next() |
| value = self.get_object() |
| finally: |
| self.exit() |
| return Described(descriptor, value) |
| |
| def put_py_described(self, d): |
| self.put_described() |
| self.enter() |
| try: |
| self.put_object(d.descriptor) |
| self.put_object(d.value) |
| finally: |
| self.exit() |
| |
| def get_py_array(self): |
| """ |
| If the current node is an array, return an Array object |
| representing the array and its contents. Otherwise return None. |
| This is a convenience wrapper around get_array, enter, etc. |
| """ |
| |
| count, described, type = self.get_array() |
| if type is None: return None |
| if self.enter(): |
| try: |
| if described: |
| self.next() |
| descriptor = self.get_object() |
| else: |
| descriptor = UNDESCRIBED |
| elements = [] |
| while self.next(): |
| elements.append(self.get_object()) |
| finally: |
| self.exit() |
| return Array(descriptor, type, *elements) |
| |
| def put_py_array(self, a): |
| described = a.descriptor != UNDESCRIBED |
| self.put_array(described, a.type) |
| self.enter() |
| try: |
| if described: |
| self.put_object(a.descriptor) |
| for e in a.elements: |
| self.put_object(e) |
| finally: |
| self.exit() |
| |
| put_mappings = { |
| None.__class__: lambda s, _: s.put_null(), |
| bool: put_bool, |
| ubyte: put_ubyte, |
| ushort: put_ushort, |
| uint: put_uint, |
| ulong: put_ulong, |
| byte: put_byte, |
| short: put_short, |
| int32: put_int, |
| long: put_long, |
| float32: put_float, |
| float: put_double, |
| decimal32: put_decimal32, |
| decimal64: put_decimal64, |
| decimal128: put_decimal128, |
| char: put_char, |
| timestamp: put_timestamp, |
| uuid.UUID: put_uuid, |
| bytes: put_binary, |
| unicode: put_string, |
| symbol: put_symbol, |
| list: put_sequence, |
| tuple: put_sequence, |
| dict: put_dict, |
| Described: put_py_described, |
| Array: put_py_array |
| } |
| # for python 3.x, long is merely an alias for int, but for python 2.x |
| # we need to add an explicit int since it is a different type |
| if int not in put_mappings: |
| put_mappings[int] = put_int |
| # Python >=3.0 has 'memoryview', <=2.5 has 'buffer', >=2.6 has both. |
| try: |
| put_mappings[memoryview] = put_memoryview |
| except NameError: |
| pass |
| try: |
| put_mappings[buffer] = put_buffer |
| except NameError: |
| pass |
| get_mappings = { |
| NULL: lambda s: None, |
| BOOL: get_bool, |
| BYTE: get_byte, |
| UBYTE: get_ubyte, |
| SHORT: get_short, |
| USHORT: get_ushort, |
| INT: get_int, |
| UINT: get_uint, |
| CHAR: get_char, |
| LONG: get_long, |
| ULONG: get_ulong, |
| TIMESTAMP: get_timestamp, |
| FLOAT: get_float, |
| DOUBLE: get_double, |
| DECIMAL32: get_decimal32, |
| DECIMAL64: get_decimal64, |
| DECIMAL128: get_decimal128, |
| UUID: get_uuid, |
| BINARY: get_binary, |
| STRING: get_string, |
| SYMBOL: get_symbol, |
| DESCRIBED: get_py_described, |
| ARRAY: get_py_array, |
| LIST: get_sequence, |
| MAP: get_dict |
| } |
| |
| def put_object(self, obj): |
| putter = self.put_mappings[obj.__class__] |
| putter(self, obj) |
| |
| def get_object(self): |
| type = self.type() |
| if type is None: return None |
| getter = self.get_mappings.get(type) |
| if getter: |
| return getter(self) |
| else: |
| return UnmappedType(str(type)) |
| |
| |
| def dat2obj(dimpl): |
| if dimpl: |
| d = Data(dimpl) |
| d.rewind() |
| d.next() |
| obj = d.get_object() |
| d.rewind() |
| return obj |
| |
| |
| def obj2dat(obj, dimpl): |
| if obj is not None: |
| d = Data(dimpl) |
| d.put_object(obj) |