batik export

batik.py

import subprocess
import tempfile
import time
import shlex

from pathlib import Path


class Error(Exception):
    """ Base Error Class for batik"""
    pass


class JavaNotFound(Error):
    """ Java not found on the system"""
    pass


class ExportFailedError(Error):
    """ Batik Export Failed"""
    pass


class Export:
    """ Wrapper for creating and managing an batik instance"""
    def __init__(self, inputs, width, height, output_dir, delete_input=False):
        self.inputs = inputs

        self.stdout = tempfile.NamedTemporaryFile()
        self.stderr = tempfile.NamedTemporaryFile()

        bakit = str(Path('./bin/batik-1.9/batik-rasterizer-1.9.jar'))

        command = [
            java, '-jar', bakit, ' '.join(self.inputs), '-d', output_dir,
            '-w', str(width), '-h', str(height)]

        self.batik = subprocess.Popen(command)
        self.start_time = time.time()

    def is_done(self):
        """ Returns True if batik is done exporting

        False means is processing data"""
        # checks to ensure that process hasn't stopped
        status = self.batik.poll()
        if status == None:
            return False
        elif status == 0:
            return True
        else:
            raise ExportFailedError

def get_java():
    # platform dependent
    java_paths = [
        'java',
        'java.exe',
        'C:\Program Files\Java\jdk1.7.0\\bin\javac',
        '/usr/bin/java',
        'C:\Program Files\Java\jdk1.6.0_30\\bin\javac.exe',
    ]
    # import test code
    for path in java_paths:
        try:
            subprocess.run(
                path, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
            return path
            break
        except FileNotFoundError:
            continue
    else:
        raise JavaNotFound

java = get_java()

batik_test.py

import sys
import os
import time

sys.path.append(os.path.join(os.getcwd(), 'lib'))

from batik import *

inputs = []

for i in range(100):
    inputs.append('./resources/template/lower_third_class.svg')


export = Export(inputs, 1920, 1080, './output')

while True:
    if export.is_done():
        break
    time.sleep(0.05)

OUTPUT

About to transcode 1 SVG file(s)

Converting file:./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg ./resources/template/lower_third_class.svg to ./output/lower_third_class.png ... ... error (SVGConverter.error.cannot.open.source)