Example usage for org.apache.mahout.common ClassUtils instantiateAs

Introduction

In this page you can find the example usage for org.apache.mahout.common ClassUtils instantiateAs.

Prototype

public static <T> T instantiateAs(Class<? extends T> clazz, Class<T> asSubclassOfClass, Class<?>[] params,
            Object[] args) 

Source Link

Usage

From source file:com.anjuke.romar.mahout.factory.MahoutServiceCommonRecommendFactory.java

License:Apache License

@Override
public MahoutService createService() {
    RomarConfig config = RomarConfig.getInstance();
    Recommender recommender;//from   ww w .  ja v  a  2  s .c  om
    DataModel dataModel = PersistenceDataModelFactory.createDataModel(config);

    recommender = ClassUtils.instantiateAs(config.getCommonRecommenderClass(), Recommender.class,
            new Class<?>[] { DataModel.class }, new Object[] { dataModel });
    return new RecommenderWrapper(recommender);
}

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From source file:com.anjuke.romar.mahout.factory.MahoutServiceItemRecommendFactory.java

License:Apache License

private ItemSimilarity createSimilarity(RomarConfig config, DataModel dataModel) {
    ItemSimilarity similarity = ClassUtils.instantiateAs(config.getItemSimilarityClass(), ItemSimilarity.class,
            new Class<?>[] { DataModel.class }, new Object[] { dataModel });
    return similarity;
}

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From source file:com.anjuke.romar.mahout.factory.MahoutServiceUserRecommendFactory.java

License:Apache License

@Override
public MahoutService createService() {
    RomarConfig config = RomarConfig.getInstance();
    Recommender recommender;//from w w w  .ja  v a2s  .c  o  m
    DataModel dataModel = PersistenceDataModelFactory.createDataModel(config);

    UserSimilarity similarity;
    if (config.isUseFileSimilarity()) {
        File file = new File(config.getSimilarityFile());
        if (!file.exists()) {
            throw new IllegalArgumentException("similairy file not exists");
        }

        if (!file.isFile()) {
            throw new IllegalArgumentException("similairy file is a directory");
        }

        IteratorBuiler<UserUserSimilarity> iteratorBuilder;
        if (config.isBinarySimilarityFile()) {
            iteratorBuilder = RomarFileSimilarityIterator.dataFileUserIteratorBuilder();
        } else {
            iteratorBuilder = RomarFileSimilarityIterator.lineFileUserIteratorBuilder();
        }
        similarity = new RomarFileUserSimilarity(file, iteratorBuilder);
    } else {
        similarity = createSimilarity(config, dataModel);
        if (config.isUseSimilariyCache()) {
            similarity = new CachingUserSimilarity(similarity, config.getSimilarityCacheSize());
        }
    }

    UserNeighborhood neighborhood = ClassUtils.instantiateAs(config.getUserNeighborhoodClass(),
            UserNeighborhood.class, new Class<?>[] { int.class, UserSimilarity.class, DataModel.class },
            new Object[] { config.getUserNeighborhoodNearestN(), similarity, dataModel });
    recommender = new GenericUserBasedRecommender(dataModel, neighborhood, similarity);

    return new RecommenderWrapper(recommender);
}

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From source file:com.anjuke.romar.mahout.factory.MahoutServiceUserRecommendFactory.java

License:Apache License

private UserSimilarity createSimilarity(RomarConfig config, DataModel dataModel) {
    UserSimilarity similarity = ClassUtils.instantiateAs(config.getUserSimilarityClass(), UserSimilarity.class,
            new Class<?>[] { DataModel.class }, new Object[] { dataModel });
    return similarity;
}

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From source file:com.netease.news.text.SequenceFilesFromDirectory.java

License:Apache License

private int runSequential(Configuration conf, Path input, Path output, Map<String, String> options)
        throws IOException, InterruptedException, NoSuchMethodException {
    // Running sequentially
    Charset charset = Charset.forName(getOption(CHARSET_OPTION[0]));
    String keyPrefix = getOption(KEY_PREFIX_OPTION[0]);
    FileSystem fs = FileSystem.get(input.toUri(), conf);
    ChunkedWriter writer = new ChunkedWriter(conf, Integer.parseInt(options.get(CHUNK_SIZE_OPTION[0])), output);

    try {//from  ww w  . j  ava2s  .  co  m
        SequenceFilesFromDirectoryFilter pathFilter;
        String fileFilterClassName = options.get(FILE_FILTER_CLASS_OPTION[0]);
        if (PrefixAdditionFilter.class.getName().equals(fileFilterClassName)) {
            pathFilter = new PrefixAdditionFilter(conf, keyPrefix, options, writer, charset, fs);
        } else {
            pathFilter = ClassUtils.instantiateAs(fileFilterClassName, SequenceFilesFromDirectoryFilter.class,
                    new Class[] { Configuration.class, String.class, Map.class, ChunkedWriter.class,
                            Charset.class, FileSystem.class },
                    new Object[] { conf, keyPrefix, options, writer, charset, fs });
        }
        fs.listStatus(input, pathFilter);
    } finally {
        Closeables.close(writer, false);
    }
    return 0;
}

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