UserEncoder.java

/*
 * Copyright 2010 Ted Dunning. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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 */

package mia.classifier.ch16;

import org.apache.mahout.math.Vector;

/**
 * Encodes a user into a feature vector.
 */
class UserEncoder {
  CategoryFeatureEncoder gender = new CategoryFeatureEncoder("gender");
  CategoryFeatureEncoder age = new CategoryFeatureEncoder("age");
  CategoryFeatureEncoder brandPreference = new CategoryFeatureEncoder("brand-cluster");

  public void addToVector(User u, Vector data) {
    gender.addToVector(u.gender, data);
    age.addToVector(u.ageGroup, data);
    brandPreference.addToVector(u.brandPreferenceClusterId, data);
  }
}