Example usage for org.apache.mahout.cf.taste.model PreferenceArray setValue

Introduction

In this page you can find the example usage for org.apache.mahout.cf.taste.model PreferenceArray setValue.

Prototype

void setValue(int i, float value);

Source Link

Document

Sets preference value for preference at i.

Usage

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

License:Apache License

private DataModel addUserItem(long userID, Iterable<List<String>> items) {
    FastByIDMap<PreferenceArray> rawData = ((GenericDataModel) delegate).getRawUserData();
    PreferenceArray prefs = rawData.get(userID);
    for (List<String> item : items) {
        long itemID = Long.parseLong(item.get(0));
        float preferenceValue = Float.parseFloat(item.get(1));
        boolean exists = false;
        if (prefs != null) {
            for (int i = 0; i < prefs.length(); i++) {
                if (prefs.getItemID(i) == itemID) {
                    exists = true;//  ww  w. j  a v a  2  s  .  com
                    prefs.setValue(i, preferenceValue);
                    break;
                }
            }
        }
        if (!exists) {
            if (prefs == null) {
                prefs = new GenericUserPreferenceArray(1);
            } else {
                PreferenceArray newPrefs = new GenericUserPreferenceArray(prefs.length() + 1);
                for (int i = 0, j = 1; i < prefs.length(); i++, j++) {
                    newPrefs.set(j, prefs.get(i));
                }
                prefs = newPrefs;
            }
            prefs.setUserID(0, userID);
            prefs.setItemID(0, itemID);
            prefs.setValue(0, preferenceValue);
            log.info("Adding userID: {} itemID: {} preferenceValue: {}", userID, itemID, preferenceValue);
            rawData.put(userID, prefs);
            if (mongoManage) {
                addMongoUserItem(Long.toString(userID), Long.toString(itemID), Float.toString(preferenceValue));
            }
        }
    }
    return new GenericDataModel(rawData);
}

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From source file:com.anjuke.romar.mahout.util.Util.java

License:Apache License

public static void applyAdd(FastByIDMap<PreferenceArray> data, Preference addPreference) {
    long userID = addPreference.getUserID();
    long itemID = addPreference.getItemID();
    float preferenceValue = addPreference.getValue();
    PreferenceArray prefs = data.get(userID);
    boolean exists = false;
    if (prefs != null) {
        for (int i = 0; i < prefs.length(); i++) {
            if (prefs.getItemID(i) == itemID) {
                exists = true;// w ww.  ja v  a2 s  .  c o  m
                prefs.setValue(i, preferenceValue);
                break;
            }
        }
    }

    if (!exists) {
        if (prefs == null) {
            prefs = new GenericUserPreferenceArray(1);
        } else {
            PreferenceArray newPrefs = new GenericUserPreferenceArray(prefs.length() + 1);
            for (int i = 0, j = 1; i < prefs.length(); i++, j++) {
                newPrefs.set(j, prefs.get(i));
            }
            prefs = newPrefs;
        }
        prefs.setUserID(0, userID);
        prefs.setItemID(0, itemID);
        prefs.setValue(0, preferenceValue);
        data.put(userID, prefs);
    }

}

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

License:Apache License

private DataModel addUserItem(long userID, Iterable<List<String>> items) {
    FastByIDMap<PreferenceArray> rawData = ((GenericDataModel) delegate).getRawUserData();
    PreferenceArray prefs = rawData.get(userID);
    for (List<String> item : items) {
        long itemID = Long.parseLong(item.get(0));
        float preferenceValue = Float.parseFloat(item.get(1));
        boolean exists = false;
        if (prefs != null) {
            for (int i = 0; i < prefs.length(); i++) {
                if (prefs.getItemID(i) == itemID) {
                    exists = true;//from w  w  w . ja  va  2s. c  o m
                    prefs.setValue(i, preferenceValue);
                    break;
                }
            }
        }
        if (!exists) {
            if (prefs == null) {
                prefs = new GenericUserPreferenceArray(1);
            } else {
                PreferenceArray newPrefs = new GenericUserPreferenceArray(prefs.length() + 1);
                for (int i = 0, j = 1; i < prefs.length(); i++, j++) {
                    newPrefs.set(j, prefs.get(i));
                }
                prefs = newPrefs;
            }
            prefs.setUserID(0, userID);
            prefs.setItemID(0, itemID);
            prefs.setValue(0, preferenceValue);
            log.info("Adding userID: {} itemID: {} preferenceValue: {}",
                    new Object[] { userID, itemID, preferenceValue });
            rawData.put(userID, prefs);
            if (mongoManage) {
                addMongoUserItem(Long.toString(userID), Long.toString(itemID), Float.toString(preferenceValue));
            }
        }
    }
    return new GenericDataModel(rawData);
}

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From source file:com.staticvillage.recommender.PreferenceBag.java

License:Apache License

public PreferenceArray getPreferences(long userId) {
    PreferenceArray prefs = new GenericUserPreferenceArray(map.size());
    prefs.setUserID(0, userId);//from  w w w  .j  av  a  2  s. co  m

    int index = 0;
    for (Map.Entry<String, Integer> entry : map.entrySet()) {
        prefs.setItemID(index, Long.valueOf(entry.getKey()));
        prefs.setValue(index, 1);

        index++;
    }

    return prefs;
}

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From source file:com.staticvillage.recommender.PreferenceBag.java

License:Apache License

public PreferenceArray getWeightedPreferences(long userId) {
    PreferenceArray prefs = new GenericUserPreferenceArray(map.size());
    prefs.setUserID(0, userId);//w w w.ja v a  2s . co m

    int index = 0;
    for (Map.Entry<String, Integer> entry : map.entrySet()) {
        prefs.setItemID(index, Long.valueOf(entry.getKey()));
        prefs.setValue(index, entry.getValue() / max);

        index++;
    }

    return prefs;
}

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

private DataModel addUserItem(long userID, Iterable<List<String>> items) {
    FastByIDMap<PreferenceArray> rawData = ((GenericDataModel) delegate).getRawUserData();
    PreferenceArray prefs = rawData.get(userID);
    for (List<String> item : items) {
        long itemID = Long.parseLong(item.get(0));
        float preferenceValue = Float.parseFloat(item.get(1));
        boolean exists = false;
        if (prefs != null) {
            for (int i = 0; i < prefs.length(); i++) {
                if (prefs.getItemID(i) == itemID) {
                    exists = true;/*from www . j av  a2  s.c  o m*/
                    prefs.setValue(i, preferenceValue);
                    break;
                }
            }
        }
        if (!exists) {
            if (prefs == null) {
                prefs = new GenericUserPreferenceArray(1);
            } else {
                PreferenceArray newPrefs = new GenericUserPreferenceArray(prefs.length() + 1);
                for (int i = 0, j = 1; i < prefs.length(); i++, j++) {
                    newPrefs.set(j, prefs.get(i));
                }
                prefs = newPrefs;
            }
            prefs.setUserID(0, userID);
            prefs.setItemID(0, itemID);
            prefs.setValue(0, preferenceValue);
            //log.info("Adding userID: {} itemID: {} preferenceValue: {}", userID, itemID, preferenceValue);
            rawData.put(userID, prefs);
            if (mongoManage) {
                addMongoUserItem(Long.toString(userID), Long.toString(itemID), Float.toString(preferenceValue));
            }
        }
    }
    return new GenericDataModel(rawData);
}

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