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document.py
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document.py
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# Copyright (c) 2014 Ahmed H. Ismail
# Licensed 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
from __future__ import print_function
from __future__ import unicode_literals
from functools import total_ordering
from spdx import config
@total_ordering
class ExternalDocumentRef(object):
"""
External Document References entity that contains the following fields :
- external_document_id: A unique string containing letters, numbers, '.',
'-' or '+'.
- spdx_document_uri: The unique ID of the SPDX document being referenced.
- check_sum: The checksum of the referenced SPDX document.
"""
def __init__(
self, external_document_id=None, spdx_document_uri=None, check_sum=None
):
self.external_document_id = external_document_id
self.spdx_document_uri = spdx_document_uri
self.check_sum = check_sum
def __eq__(self, other):
return (
isinstance(other, ExternalDocumentRef)
and self.external_document_id == other.external_document_id
and self.spdx_document_uri == other.spdx_document_uri
and self.check_sum == other.check_sum
)
def __lt__(self, other):
return (self.external_document_id, self.spdx_document_uri, self.check_sum) < (
other.external_document_id,
other.spdx_document_uri,
other.check_sum,
)
def validate(self, messages):
"""
Validate all fields of the ExternalDocumentRef class and update the
messages list with user friendly error messages for display.
"""
messages = self.validate_ext_doc_id(messages)
messages = self.validate_spdx_doc_uri(messages)
messages = self.validate_checksum(messages)
return messages
def validate_ext_doc_id(self, messages):
if not self.external_document_id:
messages = messages + ["ExternalDocumentRef has no External Document ID."]
return messages
def validate_spdx_doc_uri(self, messages):
if not self.spdx_document_uri:
messages = messages + ["ExternalDocumentRef has no SPDX Document URI."]
return messages
def validate_checksum(self, messages):
if not self.check_sum:
messages = messages + ["ExternalDocumentRef has no Checksum."]
return messages
def _add_parens(required, text):
"""
Add parens around a license expression if `required` is True, otherwise
return `text` unmodified.
"""
return "({})".format(text) if required else text
@total_ordering
class License(object):
def __init__(self, full_name, identifier):
self._full_name = full_name
self._identifier = identifier
@classmethod
def from_identifier(cls, identifier):
"""If identifier exists in config.LICENSE_MAP
the full_name is retrieved from it. Otherwise
the full_name is the same as the identifier.
"""
if identifier in config.LICENSE_MAP.keys():
return cls(config.LICENSE_MAP[identifier], identifier)
else:
return cls(identifier, identifier)
@classmethod
def from_full_name(cls, full_name):
"""
Returna new License for a full_name. If the full_name exists in
config.LICENSE_MAP the identifier is retrieved from it.
Otherwise the identifier is the same as the full_name.
"""
if full_name in config.LICENSE_MAP.keys():
return cls(full_name, config.LICENSE_MAP[full_name])
else:
return cls(full_name, full_name)
@property
def url(self):
return "http://spdx.org/licenses/{0}".format(self.identifier)
@property
def full_name(self):
return self._full_name
@full_name.setter
def full_name(self, value):
self._full_name = value
@property
def identifier(self):
return self._identifier
def __eq__(self, other):
return (
isinstance(other, License)
and self.identifier == other.identifier
and self.full_name == other.full_name
)
def __lt__(self, other):
return isinstance(other, License) and self.identifier < other.identifier
def __str__(self):
return self.identifier
def __hash__(self):
return self.identifier.__hash__()
class LicenseConjunction(License):
"""
A conjunction of two licenses.
"""
def __init__(self, license_1, license_2):
self.license_1 = license_1
self.license_2 = license_2
super(LicenseConjunction, self).__init__(self.full_name, self.identifier)
@property
def full_name(self):
license_1_complex = type(self.license_1) == LicenseDisjunction
license_2_complex = type(self.license_2) == LicenseDisjunction
return "{0} AND {1}".format(
_add_parens(license_1_complex, self.license_1.full_name),
_add_parens(license_2_complex, self.license_2.full_name),
)
@property
def identifier(self):
license_1_complex = type(self.license_1) == LicenseDisjunction
license_2_complex = type(self.license_2) == LicenseDisjunction
return "{0} AND {1}".format(
_add_parens(license_1_complex, self.license_1.identifier),
_add_parens(license_2_complex, self.license_2.identifier),
)
class LicenseDisjunction(License):
"""
A disjunction of two licenses.
"""
def __init__(self, license_1, license_2):
self.license_1 = license_1
self.license_2 = license_2
super(LicenseDisjunction, self).__init__(self.full_name, self.identifier)
@property
def full_name(self):
license_1_complex = type(self.license_1) == LicenseConjunction
license_2_complex = type(self.license_2) == LicenseConjunction
return "{0} OR {1}".format(
_add_parens(license_1_complex, self.license_1.full_name),
_add_parens(license_2_complex, self.license_2.full_name),
)
@property
def identifier(self):
license_1_complex = type(self.license_1) == LicenseConjunction
license_2_complex = type(self.license_2) == LicenseConjunction
return "{0} OR {1}".format(
_add_parens(license_1_complex, self.license_1.identifier),
_add_parens(license_2_complex, self.license_2.identifier),
)
@total_ordering
class ExtractedLicense(License):
"""
Represent an ExtractedLicense with its additional attributes:
- text: Extracted text, str. Mandatory.
- cross_ref: list of cross references.
- comment: license comment, str.
- full_name: license name. str or utils.NoAssert.
"""
def __init__(self, identifier):
super(ExtractedLicense, self).__init__(None, identifier)
self.text = None
self.cross_ref = []
self.comment = None
def __eq__(self, other):
return (
isinstance(other, ExtractedLicense)
and self.identifier == other.identifier
and self.full_name == other.full_name
)
def __lt__(self, other):
return (
isinstance(other, ExtractedLicense) and self.identifier < other.identifier
)
def add_xref(self, ref):
self.cross_ref.append(ref)
def validate(self, messages):
if self.text is None:
messages = messages + ["ExtractedLicense text can not be None"]
return messages
class Document(object):
"""
Represent an SPDX document with these fields:
- version: Spec version. Mandatory, one - Type: Version.
- data_license: SPDX-Metadata license. Mandatory, one. Type: License.
- name: Name of the document. Mandatory, one. Type: str.
- spdx_id: SPDX Identifier for the document to refer to itself in
relationship to other elements. Mandatory, one. Type: str.
- ext_document_references: External SPDX documents referenced within the
given SPDX document. Optional, one or many. Type: ExternalDocumentRef
- comment: Comments on the SPDX file, optional one. Type: str
- namespace: SPDX document specific namespace. Mandatory, one. Type: str
- creation_info: SPDX file creation info. Mandatory, one. Type: CreationInfo
- package: Package described by this document. Mandatory, one. Type: Package
- extracted_licenses: List of licenses extracted that are not part of the
SPDX license list. Optional, many. Type: ExtractedLicense.
- reviews: SPDX document review information, Optional zero or more.
Type: Review.
- annotations: SPDX document annotation information, Optional zero or more.
Type: Annotation.
- snippet: Snippet information. Optional zero or more. Type: Snippet.
- relationships : Relationship between two SPDX elements. Optional zero or more.
Type: Relationship.
"""
def __init__(
self,
version=None,
data_license=None,
name=None,
spdx_id=None,
namespace=None,
comment=None,
package=None,
):
# avoid recursive import
from spdx.creationinfo import CreationInfo
self.version = version
self.data_license = data_license
self.name = name
self.spdx_id = spdx_id
self.ext_document_references = []
self.comment = comment
self.namespace = namespace
self.creation_info = CreationInfo()
self.package = package
self.extracted_licenses = []
self.reviews = []
self.annotations = []
self.relationships = []
self.snippet = []
def add_review(self, review):
self.reviews.append(review)
def add_annotation(self, annotation):
self.annotations.append(annotation)
def add_relationships(self, relationship):
self.relationships.append(relationship)
def add_extr_lic(self, lic):
self.extracted_licenses.append(lic)
def add_ext_document_reference(self, ext_doc_ref):
self.ext_document_references.append(ext_doc_ref)
def add_snippet(self, snip):
self.snippet.append(snip)
@property
def files(self):
return self.package.files
@files.setter
def files(self, value):
self.package.files = value
@property
def has_comment(self):
return self.comment is not None
def validate(self, messages):
"""
Validate all fields of the document and update the
messages list with user friendly error messages for display.
"""
messages = self.validate_version(messages)
messages = self.validate_data_lics(messages)
messages = self.validate_name(messages)
messages = self.validate_spdx_id(messages)
messages = self.validate_namespace(messages)
messages = self.validate_ext_document_references(messages)
messages = self.validate_creation_info(messages)
messages = self.validate_package(messages)
messages = self.validate_extracted_licenses(messages)
messages = self.validate_reviews(messages)
messages = self.validate_snippet(messages)
# messages = self.validate_annotations(messages)
# messages = self.validate_relationships(messages)
return messages
def validate_version(self, messages):
if self.version is None:
messages = messages + ["Document has no version."]
return messages
def validate_data_lics(self, messages):
if self.data_license is None:
messages = messages + ["Document has no data license."]
else:
# FIXME: REALLY? what if someone wants to use something else?
if self.data_license.identifier != "CC0-1.0":
messages = messages + ["Document data license must be CC0-1.0."]
return messages
def validate_name(self, messages):
if self.name is None:
messages = messages + ["Document has no name."]
return messages
def validate_namespace(self, messages):
if self.namespace is None:
messages = messages + ["Document has no namespace."]
return messages
def validate_spdx_id(self, messages):
if self.spdx_id is None:
messages = messages + ["Document has no SPDX Identifier."]
else:
if not self.spdx_id.endswith("SPDXRef-DOCUMENT"):
messages = messages + ["Invalid Document SPDX Identifier value."]
return messages
def validate_ext_document_references(self, messages):
for doc in self.ext_document_references:
if isinstance(doc, ExternalDocumentRef):
messages = doc.validate(messages)
else:
messages = list(messages) + [
"External document references must be of the type "
"spdx.document.ExternalDocumentRef and not " + str(type(doc))
]
return messages
def validate_reviews(self, messages):
for review in self.reviews:
messages = review.validate(messages)
return messages
def validate_annotations(self, messages):
for annotation in self.annotations:
messages = annotation.validate(messages)
return messages
def validate_relationships(self, messages):
for relationship in self.relationships:
messages = relationship.validate(messages)
return messages
def validate_snippet(self, messages=None):
for snippet in self.snippet:
messages = snippet.validate(messages)
return messages
def validate_creation_info(self, messages):
if self.creation_info is not None:
messages = self.creation_info.validate(messages)
else:
messages = messages + ["Document has no creation information."]
return messages
def validate_package(self, messages):
if self.package is not None:
messages = self.package.validate(messages)
else:
messages = messages + ["Document has no package."]
return messages
def validate_extracted_licenses(self, messages):
for lic in self.extracted_licenses:
if isinstance(lic, ExtractedLicense):
messages = lic.validate(messages)
else:
messages = messages + [
"Document extracted licenses must be of type "
"spdx.document.ExtractedLicense and not " + type(lic)
]
return messages