Examples with Fn com.entwinemedia.fn.Fn used on opensource projects

Example 1 with Fn

use of com.entwinemedia.fn.Fn in project opencast by opencast.

the class PersistenceEnvs method mk.

/**
 * Create a new, concurrently usable persistence environment which uses JPA local transactions.
 * <p>
 * Transaction propagation is supported on a per thread basis.
 */
public static PersistenceEnv mk(final EntityManagerFactory emf) {
    final Transactional startTx = new Transactional() {

        @Override
        public <A> A tx(Fn<EntityManager, A> transactional) {
            for (final EntityManager em : mkEntityManager(emf)) {
                final EntityTransaction tx = em.getTransaction();
                try {
                    tx.begin();
                    emStore.set(Opt.<Transactional>some(new Transactional() {

                        @Override
                        public <A> A tx(Fn<EntityManager, A> transactional) {
                            return transactional.apply(em);
                        }
                    }));
                    A ret = transactional.apply(em);
                    tx.commit();
                    return ret;
                } catch (Exception e) {
                    if (tx.isActive()) {
                        tx.rollback();
                    }
                    // propagate exception
                    return chuck(e);
                } finally {
                    if (em.isOpen())
                        em.close();
                    emStore.remove();
                }
            }
            return chuck(new IllegalStateException("EntityManager is already closed"));
        }
    };
    return new PersistenceEnv() {

        Transactional currentTx() {
            return emStore.get().getOr(startTx);
        }

        @Override
        public <A> A tx(Fn<EntityManager, A> transactional) {
            return currentTx().tx(transactional);
        }

        @Override
        public void close() {
            emf.close();
        }
    };
}

Example 2 with Fn

use of com.entwinemedia.fn.Fn in project opencast by opencast.

the class MetadataField method createIterableStringMetadataField.

/**
 * Create a metadata field of type iterable String
 *
 * @param inputID
 *          The identifier of the new metadata field
 * @param label
 *          The label of the new metadata field
 * @param readOnly
 *          Define if the new metadata field can be or not edited
 * @param required
 *          Define if the new metadata field is or not required
 * @param isTranslatable
 *          If the field value is not human readable and should be translated before
 * @param collection
 *          If the field has a limited list of possible value, the option should contain this one. Otherwise it should
 *          be none.
 * @param order
 *          The ui order for the new field, 0 at the top and progressively down from there.
 * @return the new metadata field
 */
public static MetadataField<Iterable<String>> createIterableStringMetadataField(String inputID, Opt<String> outputID, String label, boolean readOnly, boolean required, Opt<Boolean> isTranslatable, Opt<Map<String, String>> collection, Opt<String> collectionId, Opt<Integer> order, Opt<String> namespace) {
    Fn<Opt<Iterable<String>>, JValue> iterableToJSON = new Fn<Opt<Iterable<String>>, JValue>() {

        @Override
        public JValue apply(Opt<Iterable<String>> value) {
            if (value.isNone())
                return arr();
            Object val = value.get();
            List<JValue> list = new ArrayList<>();
            if (val instanceof String) {
                // The value is a string so we need to split it.
                String stringVal = (String) val;
                for (String entry : stringVal.split(",")) {
                    list.add(v(entry, Jsons.BLANK));
                }
            } else {
                // The current value is just an iterable string.
                for (Object v : value.get()) {
                    list.add(v(v, Jsons.BLANK));
                }
            }
            return arr(list);
        }
    };
    Fn<Object, Iterable<String>> jsonToIterable = new Fn<Object, Iterable<String>>() {

        @Override
        public Iterable<String> apply(Object arrayIn) {
            JSONArray array = (JSONArray) arrayIn;
            if (array == null)
                return null;
            String[] arrayOut = new String[array.size()];
            for (int i = 0; i < array.size(); i++) {
                arrayOut[i] = (String) array.get(i);
            }
            return Arrays.asList(arrayOut);
        }
    };
    return new MetadataField<>(inputID, outputID, label, readOnly, required, new ArrayList<String>(), isTranslatable, Type.ITERABLE_TEXT, JsonType.TEXT, collection, collectionId, iterableToJSON, jsonToIterable, order, namespace);
}

Example 3 with Fn

use of com.entwinemedia.fn.Fn in project opencast by opencast.

the class MetadataField method createMixedIterableStringMetadataField.

/**
 * Create a metadata field of type mixed iterable String
 *
 * @param inputID
 *          The identifier of the new metadata field
 * @param label
 *          The label of the new metadata field
 * @param readOnly
 *          Define if the new metadata field can be or not edited
 * @param required
 *          Define if the new metadata field is or not required
 * @param isTranslatable
 *          If the field value is not human readable and should be translated before
 * @param collection
 *          If the field has a limited list of possible value, the option should contain this one. Otherwise it should
 *          be none.
 * @param order
 *          The ui order for the new field, 0 at the top and progressively down from there.
 * @return the new metadata field
 */
public static MetadataField<Iterable<String>> createMixedIterableStringMetadataField(String inputID, Opt<String> outputID, String label, boolean readOnly, boolean required, Opt<Boolean> isTranslatable, Opt<Map<String, String>> collection, Opt<String> collectionId, Opt<Integer> order, Opt<String> namespace) {
    Fn<Opt<Iterable<String>>, JValue> iterableToJSON = new Fn<Opt<Iterable<String>>, JValue>() {

        @Override
        public JValue apply(Opt<Iterable<String>> value) {
            if (value.isNone())
                return arr();
            Object val = value.get();
            List<JValue> list = new ArrayList<>();
            if (val instanceof String) {
                // The value is a string so we need to split it.
                String stringVal = (String) val;
                for (String entry : stringVal.split(",")) {
                    if (StringUtils.isNotBlank(entry))
                        list.add(v(entry, Jsons.BLANK));
                }
            } else {
                // The current value is just an iterable string.
                for (Object v : value.get()) {
                    list.add(v(v, Jsons.BLANK));
                }
            }
            return arr(list);
        }
    };
    Fn<Object, Iterable<String>> jsonToIterable = new Fn<Object, Iterable<String>>() {

        @Override
        public Iterable<String> apply(Object arrayIn) {
            JSONParser parser = new JSONParser();
            JSONArray array;
            if (arrayIn instanceof String) {
                try {
                    array = (JSONArray) parser.parse((String) arrayIn);
                } catch (ParseException e) {
                    throw new IllegalArgumentException("Unable to parse Mixed Iterable value into a JSONArray:", e);
                }
            } else {
                array = (JSONArray) arrayIn;
            }
            if (array == null)
                return new ArrayList<>();
            String[] arrayOut = new String[array.size()];
            for (int i = 0; i < array.size(); i++) {
                arrayOut[i] = (String) array.get(i);
            }
            return Arrays.asList(arrayOut);
        }
    };
    return new MetadataField<>(inputID, outputID, label, readOnly, required, new ArrayList<String>(), isTranslatable, Type.MIXED_TEXT, JsonType.MIXED_TEXT, collection, collectionId, iterableToJSON, jsonToIterable, order, namespace);
}

Example 4 with Fn

use of com.entwinemedia.fn.Fn in project opencast by opencast.

the class ToolsEndpoint method createSmilCuttingCatalog.

/**
 * Creates a SMIL cutting catalog based on the passed editing information and the media package.
 *
 * @param editingInfo
 *          the editing information
 * @param mediaPackage
 *          the media package
 * @return a SMIL catalog
 * @throws SmilException
 *           if creating the SMIL catalog failed
 */
Smil createSmilCuttingCatalog(final EditingInfo editingInfo, final MediaPackage mediaPackage) throws SmilException {
    // Create initial SMIL catalog
    SmilResponse smilResponse = smilService.createNewSmil(mediaPackage);
    // Add tracks to the SMIL catalog
    ArrayList<Track> tracks = new ArrayList<>();
    for (final String trackId : editingInfo.getConcatTracks()) {
        Track track = mediaPackage.getTrack(trackId);
        if (track == null) {
            Opt<Track> trackOpt = getInternalPublication(mediaPackage).toStream().bind(new Fn<Publication, List<Track>>() {

                @Override
                public List<Track> apply(Publication a) {
                    return Arrays.asList(a.getTracks());
                }
            }).filter(new Fn<Track, Boolean>() {

                @Override
                public Boolean apply(Track a) {
                    return trackId.equals(a.getIdentifier());
                }
            }).head();
            if (trackOpt.isNone())
                throw new IllegalStateException(format("The track '%s' doesn't exist in media package '%s'", trackId, mediaPackage));
            track = trackOpt.get();
        }
        tracks.add(track);
    }
    for (Tuple<Long, Long> segment : editingInfo.getConcatSegments()) {
        smilResponse = smilService.addParallel(smilResponse.getSmil());
        final String parentId = smilResponse.getEntity().getId();
        final Long duration = segment.getB() - segment.getA();
        smilResponse = smilService.addClips(smilResponse.getSmil(), parentId, tracks.toArray(new Track[tracks.size()]), segment.getA(), duration);
    }
    return smilResponse.getSmil();
}

Example 5 with Fn

use of com.entwinemedia.fn.Fn in project opencast by opencast.

the class AccessControlUtil method calculateChecksum.

/**
 * Calculate an MD5 checksum for an {@link AccessControlList}.
 */
public static Checksum calculateChecksum(AccessControlList acl) {
    // Use 0 as a word separator. This is safe since none of the UTF-8 code points
    // except \u0000 contains a null byte when converting to a byte array.
    final byte[] sep = new byte[] { 0 };
    final MessageDigest md = $(acl.getEntries()).sort(sortAcl).bind(new Fn<AccessControlEntry, Stream<String>>() {

        @Override
        public Stream<String> apply(AccessControlEntry entry) {
            return $(entry.getRole(), entry.getAction(), Boolean.toString(entry.isAllow()));
        }
    }).foldl(mkMd5MessageDigest(), new Fn2<MessageDigest, String, MessageDigest>() {

        @Override
        public MessageDigest apply(MessageDigest digest, String s) {
            digest.update(s.getBytes(StandardCharsets.UTF_8));
            // add separator byte (see definition above)
            digest.update(sep);
            return digest;
        }
    });
    try {
        return Checksum.create("md5", Checksum.convertToHex(md.digest()));
    } catch (NoSuchAlgorithmException e) {
        return chuck(e);
    }
}