Examples with NothingProvider org.vitrivr.cineast.core.data.providers.primitive.NothingProvider used on opensource projects

Example 1 with NothingProvider

use of org.vitrivr.cineast.core.data.providers.primitive.NothingProvider in project cineast by vitrivr.

the class EXIFMetadataExtractor method extract.

/**
 * Extracts the metadata from the specified path and returns a List of MediaObjectMetadataDescriptor objects (one for each metadata entry).
 *
 * @param objectId ID of the multimedia object for which metadata will be generated.
 * @param path     Path to the file for which metadata should be extracted.
 * @return List of MultimediaMetadataDescriptors. The list may be empty but must always be returned!
 */
@Override
public List<MediaObjectMetadataDescriptor> extract(String objectId, Path path) {
    ExifSubIFDDirectory md = MetadataUtil.getMetadataDirectoryOfType(path, ExifSubIFDDirectory.class);
    if (md == null) {
        return Collections.emptyList();
    }
    Set<Entry<String, Object>> set = Maps.transformValues(FIELDS, md::getObject).entrySet();
    return set.stream().filter(e -> e.getValue() != null).map(e -> MediaObjectMetadataDescriptor.of(objectId, this.domain(), e.getKey(), e.getValue())).filter(e -> !(e.getValueProvider() instanceof NothingProvider)).collect(Collectors.toList());
}