#
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#   http://www.apache.org/licenses/LICENSE-2.0
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"""
ManagementError exception class and subclasses, with status codes used by AMQP.
"""

from httplib import responses as STATUS_TEXT
from httplib import OK, NO_CONTENT, CREATED, \
    BAD_REQUEST, UNAUTHORIZED, FORBIDDEN, NOT_FOUND, INTERNAL_SERVER_ERROR, NOT_IMPLEMENTED

class ManagementError(Exception):
    """
    An AMQP management error.
    str() gives a string with status code and text.
    @ivar status: integer status code.
    @ivar description: detailed description of error.
    """
    def __init__(self, status, description):
        self.status, self.description = status, description
        super(ManagementError, self).__init__(description)

    @staticmethod
    def create(status, description):
        """Create the appropriate ManagementError subclass for status"""
        try:
            class_name = STATUS_TEXT[status].replace(' ', '') + "Status"
            return globals()[class_name](description)
        except KeyError:
            return ManagementError(status, description)

def _error_class(status):
    """Create a ManagementError class for a particular status"""
    class Error(ManagementError):
        def __init__(self, description): ManagementError.__init__(self, status, description)
    return Error

class BadRequestStatus(_error_class(BAD_REQUEST)): pass
class UnauthorizedStatus(_error_class(UNAUTHORIZED)): pass
class ForbiddenStatus(_error_class(FORBIDDEN)): pass
class NotFoundStatus(_error_class(NOT_FOUND)): pass
class InternalServerErrorStatus(_error_class(INTERNAL_SERVER_ERROR)): pass
class NotImplementedStatus(_error_class(NOT_IMPLEMENTED)): pass

__all__ = [
    "STATUS_TEXT", "OK", "NO_CONTENT", "CREATED",
    "BAD_REQUEST", "UNAUTHORIZED", "FORBIDDEN", "NOT_FOUND",
    "INTERNAL_SERVER_ERROR", "NOT_IMPLEMENTED",
    "ManagementError",
    "BadRequestStatus", "UnauthorizedStatus", "ForbiddenStatus",
    "NotFoundStatus", "InternalServerErrorStatus", "NotImplementedStatus"]