org.apache.tika.detect.Detector Java Examples

/**
 * Finds media type (through Apache Tika library), based on filename and magic numbers.
 * @throws IOException
 */
public static MediaType findMediaType(InputStream is, String fileName) throws IOException {
    BufferedInputStream bis = new BufferedInputStream(is);
    try {
        AutoDetectParser parser = new AutoDetectParser();
        Detector detector = parser.getDetector();
        Metadata md = new Metadata();
        md.add(Metadata.RESOURCE_NAME_KEY, fileName);
        MediaType mediaType = detector.detect(bis, md);
        return mediaType;
    } finally {
        try {
            bis.close();
        } catch (IOException e) {
            ;
        }
    }
}
 

public static String detectContentType(String uri) throws FileNotFoundException, IOException, TikaException {
	final Detector detector = config.getDetector();
	final TikaInputStream inputStream = createInputStream(uri);
	final Metadata metadata = new Metadata();

	// Set the file name. This provides some level of type-hinting.
	metadata.add(TikaMetadataKeys.RESOURCE_NAME_KEY, new File(uri).getName());

	// Detect the content type.
	String contentType = detector.detect(inputStream, metadata).toString();

	inputStream.close();

	// Return the default content-type if undetermined.
	if (contentType == null || contentType.isEmpty()) {
		return MediaType.OCTET_STREAM.toString();
	}

	return contentType;
}
 

@BuildStep
@Record(ExecutionTime.STATIC_INIT)
void initializeTikaParser(BeanContainerBuildItem beanContainer, TikaRecorder recorder,
        BuildProducer<ServiceProviderBuildItem> serviceProvider, TikaConfiguration configuration)
        throws Exception {
    Map<String, List<TikaParserParameter>> parsers = getSupportedParserConfig(configuration.tikaConfigPath,
            configuration.parsers,
            configuration.parserOptions, configuration.parser);
    String tikaXmlConfiguration = generateTikaXmlConfiguration(parsers);

    serviceProvider.produce(new ServiceProviderBuildItem(Parser.class.getName(), new ArrayList<>(parsers.keySet())));
    serviceProvider
            .produce(new ServiceProviderBuildItem(Detector.class.getName(), getProviderNames(Detector.class.getName())));
    serviceProvider.produce(new ServiceProviderBuildItem(EncodingDetector.class.getName(),
            getProviderNames(EncodingDetector.class.getName())));

    recorder.initTikaParser(beanContainer.getValue(), configuration, tikaXmlConfiguration);
}
 

public static String detectContentTypeAndCharset(String uri) throws FileNotFoundException, IOException, TikaException {
	final Detector detector = config.getDetector();
	final TikaInputStream inputStream = createInputStream(uri);
	final Metadata metadata = new Metadata();

	// Set the file name. This provides some level of type-hinting.
	metadata.add(TikaMetadataKeys.RESOURCE_NAME_KEY, new File(uri).getName());

	// Detect the content type.
	String contentType = detector.detect(inputStream, metadata).toString();

	// Use metadata to provide type-hinting to the AutoDetectReader.
	fillMetadata(metadata, contentType, uri);

	// Detect the character set.
	final AutoDetectReader reader = new AutoDetectReader(inputStream, metadata);
	String charset = reader.getCharset().toString();

	inputStream.close();

	// Return the default content-type if undetermined.
	if (contentType == null || contentType.isEmpty()) {
		return MediaType.OCTET_STREAM.toString();
	}

	// Append the charset if the content-type was determined.
	if (charset != null && !charset.isEmpty()) {
		return contentType + "; charset=" + charset;
	}

	return contentType;
}
 

public static String detectDocTypeUsingDetector(InputStream stream) throws IOException {
    Detector detector = new DefaultDetector();
    Metadata metadata = new Metadata();

    MediaType mediaType = detector.detect(stream, metadata);
    return mediaType.toString();
}
 

/**
 * Create new Tika-based content extractor using the provided parser instances.
 * @param parsers parser instances
 */
public TikaContentExtractor(final List<Parser> parsers, Detector detector) {
    this.parsers = parsers;
    this.detector = detector;
}
 

protected Detector getDetector() {
  return detector;
}