1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany
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2 | //
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3 | // Licensed under the Apache License, Version 2.0 (the "License");
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4 | // you may not use this file except in compliance with the License.
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5 | // You may obtain a copy of the License at
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6 | //
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7 | // http://www.apache.org/licenses/LICENSE-2.0
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8 | //
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9 | // Unless required by applicable law or agreed to in writing, software
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10 | // distributed under the License is distributed on an "AS IS" BASIS,
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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12 | // See the License for the specific language governing permissions and
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13 | // limitations under the License.
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14 |
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15 | package de.ugoe.cs.autoquest.commands.usage;
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16 |
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17 | import java.util.List;
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18 | import java.util.Random;
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19 |
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20 | import de.ugoe.cs.autoquest.usageprofiles.PredictionByPartialMatch;
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21 | import de.ugoe.cs.autoquest.usageprofiles.TrieBasedModel;
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22 |
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23 | /**
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24 | * <p>
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25 | * Command that trains Prediction by Partial Match (PPM) models.
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26 | * </p>
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27 | *
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28 | * @author Steffen Herbold
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29 | * @version 2.0
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30 | */
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31 | public class CMDtrainPPM extends AbstractTrainCommand {
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32 |
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33 | /**
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34 | * <p>
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35 | * Escape probability of the PPM model.
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36 | * </p>
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37 | */
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38 | double probEscape;
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39 |
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40 | /**
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41 | * <p>
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42 | * Maximal Markov order of the PPM model.
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43 | * </p>
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44 | */
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45 | int maxOrder;
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46 |
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47 | /**
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48 | * <p>
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49 | * Minimal Markov order of the PPM model. Default: 0
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50 | * </p>
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51 | */
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52 | int minOrder = 0;
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53 |
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54 | /*
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55 | * (non-Javadoc)
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56 | *
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57 | * @see de.ugoe.cs.util.console.Command#help()
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58 | */
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59 | @Override
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60 | public String help() {
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61 | return "trainPPM <modelname> <sequencesName> <probEscape> <maxOrder> {<minOrder>}";
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62 | }
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63 |
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64 | /**
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65 | * <p>
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66 | * Handles the parameters probEscape, maxOrder, and minOrder.
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67 | * </p>
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68 | *
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69 | * @see de.ugoe.cs.autoquest.commands.usage.AbstractTrainCommand#handleOptionalParameters(java.util.List)
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70 | */
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71 | @Override
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72 | void handleAdditionalParameters(List<Object> parameters) throws Exception {
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73 | probEscape = Double.parseDouble((String) parameters.get(2));
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74 | maxOrder = Integer.parseInt((String) parameters.get(3));
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75 | if (parameters.size() == 5) {
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76 | minOrder = Integer.parseInt((String) parameters.get(4));
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77 | }
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78 | }
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79 |
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80 | /*
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81 | * (non-Javadoc)
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82 | *
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83 | * @see de.ugoe.cs.autoquest.ui.commands.AbstractTrainCommand#createModel()
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84 | */
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85 | @Override
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86 | TrieBasedModel createModel() {
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87 | return new PredictionByPartialMatch(maxOrder, minOrder, new Random(),
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88 | probEscape);
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89 | }
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90 |
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91 | }
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