Example usage for org.apache.mahout.cf.taste.impl.model GenericDataModel toDataMap

Introduction

In this page you can find the example usage for org.apache.mahout.cf.taste.impl.model GenericDataModel toDataMap.

Prototype

public static FastByIDMap<PreferenceArray> toDataMap(FastByIDMap<Collection<Preference>> data, boolean byUser) 

Source Link

Document

Swaps, in-place, List s for arrays in Map values .

Usage

From source file:alto.plugin.webradio.recommender.MongoDBDataModel.java

License:Apache License

private void buildModel() throws UnknownHostException {
    userIsObject = false;/*w w  w .  j a  va 2 s . c  om*/
    itemIsObject = false;
    idCounter = 0;
    preferenceIsString = true;
    Mongo mongoDDBB = new Mongo(mongoHost, mongoPort);
    DB db = mongoDDBB.getDB(mongoDB);
    mongoTimestamp = new Date(0);
    FastByIDMap<Collection<Preference>> userIDPrefMap = new FastByIDMap<Collection<Preference>>();
    if (!mongoAuth || db.authenticate(mongoUsername, mongoPassword.toCharArray())) {
        collection = db.getCollection(mongoCollection);
        collectionMap = db.getCollection(mongoMapCollection);
        DBObject indexObj = new BasicDBObject();
        indexObj.put("element_id", 1);
        collectionMap.ensureIndex(indexObj);
        indexObj = new BasicDBObject();
        indexObj.put("long_value", 1);
        collectionMap.ensureIndex(indexObj);
        collectionMap.remove(new BasicDBObject());
        DBCursor cursor = collection.find();
        while (cursor.hasNext()) {
            Map<String, Object> user = (Map<String, Object>) cursor.next().toMap();
            if (!user.containsKey("deleted_at")) {
                long userID = Long.parseLong(fromIdToLong(getID(user.get(mongoUserID), true), true));
                long itemID = Long.parseLong(fromIdToLong(getID(user.get(mongoItemID), false), false));
                float ratingValue = getPreference(user.get(mongoPreference));
                Collection<Preference> userPrefs = userIDPrefMap.get(userID);
                if (userPrefs == null) {
                    userPrefs = Lists.newArrayListWithCapacity(2);
                    userIDPrefMap.put(userID, userPrefs);
                }
                userPrefs.add(new GenericPreference(userID, itemID, ratingValue));
                if (user.containsKey("created_at")
                        && mongoTimestamp.compareTo(getDate(user.get("created_at"))) < 0) {
                    mongoTimestamp = getDate(user.get("created_at"));
                }
            }
        }
    }
    delegate = new GenericDataModel(GenericDataModel.toDataMap(userIDPrefMap, true));
}

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From source file:com.paradigma.recommender.db.MongoDBDataModel.java

License:Apache License

private void buildModel() throws UnknownHostException, MongoException {
    userIsObject = false;/*from  w w w .j a v a  2s . c o  m*/
    itemIsObject = false;
    idCounter = 0;
    preferenceIsString = true;
    Mongo mongoDDBB = new Mongo(mongoHost, mongoPort);
    DB db = mongoDDBB.getDB(mongoDB);
    mongoTimestamp = new Date(0);
    FastByIDMap<Collection<Preference>> userIDPrefMap = new FastByIDMap<Collection<Preference>>();
    if (!mongoAuth || (mongoAuth && db.authenticate(mongoUsername, mongoPassword.toCharArray()))) {
        collection = db.getCollection(mongoCollection);
        collectionMap = db.getCollection(MONGO_MAP_COLLECTION);
        DBObject indexObj = new BasicDBObject();
        indexObj.put("element_id", 1);
        collectionMap.ensureIndex(indexObj);
        indexObj = new BasicDBObject();
        indexObj.put("long_value", 1);
        collectionMap.ensureIndex(indexObj);
        collectionMap.remove(new BasicDBObject());
        DBCursor cursor = collection.find();
        while (cursor.hasNext()) {
            Map<String, Object> user = (Map<String, Object>) cursor.next().toMap();
            if (!user.containsKey("deleted_at")) {
                long userID = Long.parseLong(fromIdToLong(getID(user.get(mongoUserID), true), true));
                long itemID = Long.parseLong(fromIdToLong(getID(user.get(mongoItemID), false), false));
                float ratingValue = getPreference(user.get(mongoPreference));
                Collection<Preference> userPrefs = userIDPrefMap.get(userID);
                if (userPrefs == null) {
                    userPrefs = Lists.newArrayListWithCapacity(2);
                    userIDPrefMap.put(userID, userPrefs);
                }
                userPrefs.add(new GenericPreference(userID, itemID, ratingValue));
                if (user.containsKey("created_at")
                        && mongoTimestamp.compareTo(getDate(user.get("created_at"))) < 0) {
                    mongoTimestamp = getDate(user.get("created_at"));
                }
            }
        }
    }
    delegate = new GenericDataModel(GenericDataModel.toDataMap(userIDPrefMap, true));
}

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From source file:edu.uniandes.yelp.recommender.MongoDBDataModel.java

private void buildModel() throws UnknownHostException {
    userIsObject = false;//w  w  w . j av  a 2 s.c o m
    itemIsObject = false;
    idCounter = 0;
    preferenceIsString = true;
    MongoClient mongoDDBB = new MongoClient(mongoHost, mongoPort);
    DB db = mongoDDBB.getDB(mongoDB);
    mongoTimestamp = new Date(0);
    FastByIDMap<Collection<Preference>> userIDPrefMap = new FastByIDMap<>();
    if (!mongoAuth) {
        collection = db.getCollection(mongoCollection);
        collectionMap = db.getCollection(mongoMapCollection);
        DBObject indexObj = new BasicDBObject();
        indexObj.put("element_id", 1);
        collectionMap.createIndex(indexObj);
        indexObj = new BasicDBObject();
        indexObj.put("long_value", 1);
        collectionMap.createIndex(indexObj);
        collectionMap.remove(new BasicDBObject());
        DBCursor cursor = collection.find();
        while (cursor.hasNext()) {
            Map<String, Object> user = (Map<String, Object>) cursor.next().toMap();
            if (!user.containsKey("deleted_at")) {
                long userID = Long.parseLong(fromIdToLong(getID(user.get(mongoUserID), true), true));
                long itemID = Long.parseLong(fromIdToLong(getID(user.get(mongoItemID), false), false));
                float ratingValue = getPreference(user.get(mongoPreference));
                Collection<Preference> userPrefs = userIDPrefMap.get(userID);
                if (userPrefs == null) {
                    userPrefs = new ArrayList<>(2);
                    userIDPrefMap.put(userID, userPrefs);
                }
                userPrefs.add(new GenericPreference(userID, itemID, ratingValue));
                if (user.containsKey("created_at")
                        && mongoTimestamp.compareTo(getDate(user.get("created_at"))) < 0) {
                    mongoTimestamp = getDate(user.get("created_at"));
                }
            }
        }
    }
    delegate = new GenericDataModel(GenericDataModel.toDataMap(userIDPrefMap, true));
}

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From source file:net.recommenders.rival.recommend.frameworks.mahout.DataModelWrapper.java

License:Apache License

/**
 * Constructs the wrapper using the provided model.
 *
 * @param model the model to be used to create the wrapped model
 *//*from www  .  ja v  a  2 s  . c o  m*/
public DataModelWrapper(final net.recommenders.rival.core.TemporalDataModelIF<Long, Long> model) {
    FastByIDMap<Collection<Preference>> data = new FastByIDMap<Collection<Preference>>();
    FastByIDMap<FastByIDMap<Long>> timestampData = new FastByIDMap<FastByIDMap<Long>>();
    for (Long u : model.getUserItemPreferences().keySet()) {
        List<Preference> prefs = new ArrayList<Preference>();
        FastByIDMap<Long> userTimestamps = new FastByIDMap<Long>();
        timestampData.put(u, userTimestamps);
        for (Long i : model.getUserItemPreferences().get(u).keySet()) {
            Set<Long> timestamps = model.getUserItemTimestamps().get(u).get(i);
            long t = -1;
            if (timestamps != null) {
                for (Long tt : timestamps) {
                    t = tt;
                    break;
                }
            }
            userTimestamps.put(i, t);
            prefs.add(new GenericPreference(u, i, model.getUserItemPreferences().get(u).get(i).floatValue()));
        }
        data.put(u, prefs);
    }

    FastByIDMap<PreferenceArray> userData = GenericDataModel.toDataMap(data, true);
    wrapper = new GenericDataModel(userData, timestampData);
}

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