sutime.sutime.SUTime._load_java_wrapper_class() - Code Metrics - FraBle/python-sutime - Measure and Improve Code Quality continuously with Scrutinizer

sutime.sutime.SUTime._load_java_wrapper_class() A
last analyzed 2020-11-03 09:19 UTC

↳ Parent: sutime.sutime

Complexity

Conditions

Size

Total Lines	16
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	13
dl	0
loc	16
rs	9.75
c	0
b	0
f	0
cc	4
nop	2

# -*- coding: utf-8 -*-
"""A Python wrapper for Stanford CoreNLP's SUTime."""

import glob
import importlib
import json
import logging
import os
import socket
import sys
import threading
from pathlib import Path
from typing import Dict, List, Optional

import jpype  # pyre-ignore[21]

SOCKED_DEFAULT_TIMEOUT = 15
socket.setdefaulttimeout(SOCKED_DEFAULT_TIMEOUT)


class SUTime(object):
    """Python wrapper for SUTime (CoreNLP) by Stanford."""

    _sutime_python_jar = 'stanford-corenlp-sutime-python-1.4.0.jar'
    _sutime_java_class = 'edu.stanford.nlp.python.SUTimeWrapper'
    _corenlp_version = '4.0.0'

    # full name or ISO 639-1 code
    _languages = {
        'arabic': 'arabic',
        'ar': 'arabic',
        'chinese': 'chinese',
        'zh': 'chinese',
        'english': 'english',
        'british': 'british',
        'en': 'english',
        'french': 'french',
        'fr': 'french',
        'german': 'german',
        'de': 'german',
        'spanish': 'spanish',
        'es': 'spanish',
    }

    # https://github.com/stanfordnlp/CoreNLP/tree/master/src/edu/stanford/nlp/time/rules
    _supported_languages = {'british', 'english', 'spanish'}

    _required_jars = {
        'stanford-corenlp-{0}-models.jar'.format('4.0.0'),
        'stanford-corenlp-{0}.jar'.format('4.0.0'),
        'gson-2.8.6.jar',
        'slf4j-simple-1.7.30.jar',
    }

    def __init__(
        self,
        jars: Optional[str] = None,
        jvm_started: Optional[bool] = False,
        mark_time_ranges: Optional[bool] = False,
        include_range: Optional[bool] = False,
        jvm_flags: Optional[List[str]] = None,
        language: Optional[str] = 'english',
    ):
        """Initialize `SUTime` wrapper.

        Args:
            jars (Optional[str]): Path to previously downloaded SUTime Java
                dependencies. Defaults to False.
            jvm_started (Optional[bool]): Flag to indicate that JVM has been
                already started (with all Java dependencies loaded). Defaults
                to False.
            mark_time_ranges (Optional[bool]): SUTime flag for
                sutime.markTimeRanges. Defaults to False.
                "Whether or not to recognize time ranges such as 'July to
                August'"
            include_range (Optional[bool]): SUTime flag for
                sutime.includeRange. Defaults to False.
                "Whether or not to add range info to the TIMEX3 object"
            jvm_flags (Optional[List[str]]): List of flags passed to JVM. For
                example, this may be used to specify the maximum heap size
                using '-Xmx'. Has no effect if `jvm_started` is set to True.
                Defaults to None.
            language (Optional[str]): Selected language. Currently supported
                are: english (/en), british, spanish (/es). Defaults to
                `english`.
        """
        self.mark_time_ranges = mark_time_ranges
        self.include_range = include_range
        self._is_loaded = False
        self._sutime = None
        self._lock = threading.Lock()
        module_root = Path(__file__).resolve().parent
        self.jars = Path(jars) if jars else module_root / 'jars'

        self._check_language_model_dependency(
            language.lower() if language else '',
        )

        if not jvm_started:
            self._classpath = self._create_classpath()
            self._start_jvm(jvm_flags)

        self._load_java_wrapper_class(language)

    def parse(
        self, input_str: str, reference_date: Optional[str] = '',
    ) -> List[Dict]:
        """Parse datetime information out of string input.

        It invokes the SUTimeWrapper.annotate() function in Java.

        Args:
            input_str (str): The input as string that has to be parsed.
            reference_date (Optional[str]): Optional reference data for SUTime.
                Defaults to `''`.

        Returns:
            A list of dicts with the result from the `SUTimeWrapper.annotate()`
            call.

        Raises:
            RuntimeError: An error occurs when CoreNLP is not loaded.
        """
        if self._is_loaded is False:
            raise RuntimeError('Please load SUTime first!')

        if reference_date:
            return json.loads(str(self._sutime.annotate(
                input_str, reference_date,
            )))
        return json.loads(str(self._sutime.annotate(input_str)))

    def _load_java_wrapper_class(self, language: Optional[str]):
        try:
            # make it thread-safe
            if threading.active_count() > 1:
                if not jpype.isThreadAttachedToJVM():
                    jpype.attachThreadToJVM()
            self._lock.acquire()
            wrapper = jpype.JClass(self._sutime_java_class)
            self._sutime = wrapper(
                self.mark_time_ranges, self.include_range, language,
            )
            self._is_loaded = True
        except Exception as exc:
            sys.exit('Could not load JVM: {0}'.format(exc))
        finally:
            self._lock.release()

    def _check_language_model_dependency(self, language: str):
        if language not in self._languages:
            raise RuntimeError('Unsupported language: {0}'.format(language))
        normalized_language = self._languages[language]

        if normalized_language not in self._supported_languages:
            logging.warning('{0}: {1}. {2}.'.format(
                normalized_language.capitalize(),
                'is not (yet) supported by SUTime',
                'Falling back to default model',
            ))
            return

        language_model_file = (
            self.jars / 'stanford-corenlp-{0}-models-{1}.jar'.format(
                self._corenlp_version,
                normalized_language,
            ))

        language_model_file_exists = glob.glob(str(language_model_file))
        is_english_language = normalized_language in {'english', 'british'}

        if not (language_model_file_exists or is_english_language):
            raise RuntimeError(
                'Missing language model for {0}! Run {1} {2} {3}'.format(
                    self._languages[language].capitalize(),
                    'mvn dependency:copy-dependencies',
                    '-DoutputDirectory=./sutime/jars -P',
                    self._languages[language],
                ),
            )

    def _start_jvm(self, additional_flags: Optional[List[str]]):
        flags = ['-Djava.class.path={0}'.format(self._classpath)]
        if additional_flags:
            flags.extend(additional_flags)
        logging.info('jpype.isJVMStarted(): {0}'.format(jpype.isJVMStarted()))
        if not jpype.isJVMStarted():
            jpype.startJVM(jpype.getDefaultJVMPath(), *flags)

    def _create_classpath(self):
        sutime_jar = (
            Path(importlib.util.find_spec('sutime').origin).parent /
            'jars' / self._sutime_python_jar
        )
        jars = [sutime_jar]
        jar_file_names = []
        for top, _, files in os.walk(self.jars):
            for file_name in files:
                if file_name.endswith('.jar'):
                    jars.append(Path(top, file_name))
                    jar_file_names.append(file_name)
        if not self._required_jars.issubset(jar_file_names):
            logging.warning([
                jar for jar in self._required_jars if jar not in jar_file_names
            ])
            raise RuntimeError(
                'Not all necessary Java dependencies have been downloaded!',
            )
        return os.pathsep.join(str(jar) for jar in jars)


1			# -- coding: utf-8 --
2			"""A Python wrapper for Stanford CoreNLP's SUTime."""
3
4			import glob
5			import importlib
6			import json
7			import logging
8			import os
9			import socket
10			import sys
11			import threading
12			from pathlib import Path
13			from typing import Dict, List, Optional
14
15			import jpype # pyre-ignore[21]
16
17			SOCKED_DEFAULT_TIMEOUT = 15
18			socket.setdefaulttimeout(SOCKED_DEFAULT_TIMEOUT)
19
20
21			class SUTime(object):
22			"""Python wrapper for SUTime (CoreNLP) by Stanford."""
23
24			_sutime_python_jar = 'stanford-corenlp-sutime-python-1.4.0.jar'
25			_sutime_java_class = 'edu.stanford.nlp.python.SUTimeWrapper'
26			_corenlp_version = '4.0.0'
27
28			# full name or ISO 639-1 code
29			_languages = {
30			'arabic': 'arabic',
31			'ar': 'arabic',
32			'chinese': 'chinese',
33			'zh': 'chinese',
34			'english': 'english',
35			'british': 'british',
36			'en': 'english',
37			'french': 'french',
38			'fr': 'french',
39			'german': 'german',
40			'de': 'german',
41			'spanish': 'spanish',
42			'es': 'spanish',
43			}
44
45			# https://github.com/stanfordnlp/CoreNLP/tree/master/src/edu/stanford/nlp/time/rules
46			_supported_languages = {'british', 'english', 'spanish'}
47
48			_required_jars = {
49			'stanford-corenlp-{0}-models.jar'.format('4.0.0'),
50			'stanford-corenlp-{0}.jar'.format('4.0.0'),
51			'gson-2.8.6.jar',
52			'slf4j-simple-1.7.30.jar',
53			}
54
55			def __init__(
56			self,
57			jars: Optional[str] = None,
58			jvm_started: Optional[bool] = False,
59			mark_time_ranges: Optional[bool] = False,
60			include_range: Optional[bool] = False,
61			jvm_flags: Optional[List[str]] = None,
62			language: Optional[str] = 'english',
63			):
64			"""Initialize `SUTime` wrapper.
65
66			Args:
67			jars (Optional[str]): Path to previously downloaded SUTime Java
68			dependencies. Defaults to False.
69			jvm_started (Optional[bool]): Flag to indicate that JVM has been
70			already started (with all Java dependencies loaded). Defaults
71			to False.
72			mark_time_ranges (Optional[bool]): SUTime flag for
73			sutime.markTimeRanges. Defaults to False.
74			"Whether or not to recognize time ranges such as 'July to
75			August'"
76			include_range (Optional[bool]): SUTime flag for
77			sutime.includeRange. Defaults to False.
78			"Whether or not to add range info to the TIMEX3 object"
79			jvm_flags (Optional[List[str]]): List of flags passed to JVM. For
80			example, this may be used to specify the maximum heap size
81			using '-Xmx'. Has no effect if `jvm_started` is set to True.
82			Defaults to None.
83			language (Optional[str]): Selected language. Currently supported
84			are: english (/en), british, spanish (/es). Defaults to
85			`english`.
86			"""
87			self.mark_time_ranges = mark_time_ranges
88			self.include_range = include_range
89			self._is_loaded = False
90			self._sutime = None
91			self._lock = threading.Lock()
92			module_root = Path(__file__).resolve().parent
93			self.jars = Path(jars) if jars else module_root / 'jars'
94
95			self._check_language_model_dependency(
96			language.lower() if language else '',
97			)
98
99			if not jvm_started:
100			self._classpath = self._create_classpath()
101			self._start_jvm(jvm_flags)
102
103			self._load_java_wrapper_class(language)
104
105			def parse(
106			self, input_str: str, reference_date: Optional[str] = '',
107			) -> List[Dict]:
108			"""Parse datetime information out of string input.
109
110			It invokes the SUTimeWrapper.annotate() function in Java.
111
112			Args:
113			input_str (str): The input as string that has to be parsed.
114			reference_date (Optional[str]): Optional reference data for SUTime.
115			Defaults to `''`.
116
117			Returns:
118			A list of dicts with the result from the `SUTimeWrapper.annotate()`
119			call.
120
121			Raises:
122			RuntimeError: An error occurs when CoreNLP is not loaded.
123			"""
124			if self._is_loaded is False:
125			raise RuntimeError('Please load SUTime first!')
126
127			if reference_date:
128			return json.loads(str(self._sutime.annotate(
129			input_str, reference_date,
130			)))
131			return json.loads(str(self._sutime.annotate(input_str)))
132
133			def _load_java_wrapper_class(self, language: Optional[str]):
134			try:
135			# make it thread-safe
136			if threading.active_count() > 1:
137			if not jpype.isThreadAttachedToJVM():
138			jpype.attachThreadToJVM()
139			self._lock.acquire()
140			wrapper = jpype.JClass(self._sutime_java_class)
141			self._sutime = wrapper(
142			self.mark_time_ranges, self.include_range, language,
143			)
144			self._is_loaded = True
145			except Exception as exc:
146			sys.exit('Could not load JVM: {0}'.format(exc))
147			finally:
148			self._lock.release()
149
150			def _check_language_model_dependency(self, language: str):
151			if language not in self._languages:
152			raise RuntimeError('Unsupported language: {0}'.format(language))
153			normalized_language = self._languages[language]
154
155			if normalized_language not in self._supported_languages:
156			logging.warning('{0}: {1}. {2}.'.format(
157			normalized_language.capitalize(),
158			'is not (yet) supported by SUTime',
159			'Falling back to default model',
160			))
161			return
162
163			language_model_file = (
164			self.jars / 'stanford-corenlp-{0}-models-{1}.jar'.format(
165			self._corenlp_version,
166			normalized_language,
167			))
168
169			language_model_file_exists = glob.glob(str(language_model_file))
170			is_english_language = normalized_language in {'english', 'british'}
171
172			if not (language_model_file_exists or is_english_language):
173			raise RuntimeError(
174			'Missing language model for {0}! Run {1} {2} {3}'.format(
175			self._languages[language].capitalize(),
176			'mvn dependency:copy-dependencies',
177			'-DoutputDirectory=./sutime/jars -P',
178			self._languages[language],
179			),
180			)
181
182			def _start_jvm(self, additional_flags: Optional[List[str]]):
183			flags = ['-Djava.class.path={0}'.format(self._classpath)]
184			if additional_flags:
185			flags.extend(additional_flags)
186			logging.info('jpype.isJVMStarted(): {0}'.format(jpype.isJVMStarted()))
187			if not jpype.isJVMStarted():
188			jpype.startJVM(jpype.getDefaultJVMPath(), *flags)
189
190			def _create_classpath(self):
191			sutime_jar = (
192			Path(importlib.util.find_spec('sutime').origin).parent /
193			'jars' / self._sutime_python_jar
194			)
195			jars = [sutime_jar]
196			jar_file_names = []
197			for top, _, files in os.walk(self.jars):
198			for file_name in files:
199			if file_name.endswith('.jar'):
200			jars.append(Path(top, file_name))
201			jar_file_names.append(file_name)
202			if not self._required_jars.issubset(jar_file_names):
203			logging.warning([
204			jar for jar in self._required_jars if jar not in jar_file_names
205			])
206			raise RuntimeError(
207			'Not all necessary Java dependencies have been downloaded!',
208			)
209			return os.pathsep.join(str(jar) for jar in jars)
210

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sutime.sutime.SUTime._load_java_wrapper_class() A last analyzed 2020-11-03 09:19 UTC

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sutime.sutime.SUTime._load_java_wrapper_class() A
last analyzed 2020-11-03 09:19 UTC