/**
* Creates a default Tika configuration. First checks whether an XML config file is specified,
* either in
*
* <ol>
* <li>System property "tika.config", or
* <li>Environment variable TIKA_CONFIG
* </ol>
*
* <p>If one of these have a value, try to resolve it relative to file system or classpath.
*
* <p>If XML config is not specified, initialize from the built-in media type rules and all the
* {@link Parser} implementations available through the {@link ServiceRegistry service provider
* mechanism} in the context class loader of the current thread.
*
* @throws IOException if the configuration can not be read
* @throws TikaException if problem with MimeTypes or parsing XML config
*/
public TikaConfig() throws TikaException, IOException {
this.serviceLoader = new ServiceLoader();
String config = System.getProperty("tika.config");
if (config == null) {
config = System.getenv("TIKA_CONFIG");
}
if (config == null) {
this.mimeTypes = getDefaultMimeTypes(ServiceLoader.getContextClassLoader());
this.parser = getDefaultParser(mimeTypes, serviceLoader);
this.detector = getDefaultDetector(mimeTypes, serviceLoader);
this.translator = getDefaultTranslator(serviceLoader);
this.executorService = getDefaultExecutorService();
} else {
try (InputStream stream = getConfigInputStream(config, serviceLoader)) {
Element element = getBuilder().parse(stream).getDocumentElement();
ParserXmlLoader parserLoader = new ParserXmlLoader();
DetectorXmlLoader detectorLoader = new DetectorXmlLoader();
TranslatorXmlLoader translatorLoader = new TranslatorXmlLoader();
ExecutorServiceXmlLoader executorLoader = new ExecutorServiceXmlLoader();
this.mimeTypes = typesFromDomElement(element);
this.parser = parserLoader.loadOverall(element, mimeTypes, serviceLoader);
this.detector = detectorLoader.loadOverall(element, mimeTypes, serviceLoader);
this.translator = translatorLoader.loadOverall(element, mimeTypes, serviceLoader);
this.executorService = executorLoader.loadOverall(element, mimeTypes, serviceLoader);
} catch (SAXException e) {
throw new TikaException("Specified Tika configuration has syntax errors: " + config, e);
}
}
}
private TikaConfig(Element element, ServiceLoader loader) throws TikaException, IOException {
ParserXmlLoader parserLoader = new ParserXmlLoader();
DetectorXmlLoader detectorLoader = new DetectorXmlLoader();
TranslatorXmlLoader translatorLoader = new TranslatorXmlLoader();
ExecutorServiceXmlLoader executorLoader = new ExecutorServiceXmlLoader();
this.mimeTypes = typesFromDomElement(element);
this.detector = detectorLoader.loadOverall(element, mimeTypes, loader);
this.parser = parserLoader.loadOverall(element, mimeTypes, loader);
this.translator = translatorLoader.loadOverall(element, mimeTypes, loader);
this.executorService = executorLoader.loadOverall(element, mimeTypes, loader);
this.serviceLoader = loader;
}