| 1 | package de.uka.ipd.sdq.sensorframework.filter; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.Collection; |
| 5 | import java.util.Properties; |
| 6 | |
| 7 | import de.uka.ipd.sdq.sensorframework.entities.Measurement; |
| 8 | import de.uka.ipd.sdq.sensorframework.entities.SensorAndMeasurements; |
| 9 | |
| 10 | /** |
| 11 | * The class creates the filtered collection from measurements collection. |
| 12 | * |
| 13 | * @author Roman Andrej |
| 14 | */ |
| 15 | public class FilteredCollectionsManager { |
| 16 | |
| 17 | private ArrayList<IFilteredCollectionFactory> factories = new ArrayList<IFilteredCollectionFactory>(); |
| 18 | |
| 19 | IFilteredCollectionFactory factory; |
| 20 | |
| 21 | /** Filters count value. */ |
| 22 | private static int count = 0; |
| 23 | |
| 24 | /** Get the filtered measurements as new SensorAndMeasurements instance. */ |
| 25 | public Object getFilteredMeasurements(SensorAndMeasurements sam) { |
| 26 | return new SensorAndMeasurements(sam.getSensor(), |
| 27 | filteringTheMeasurements(sam.getMeasurements())); |
| 28 | } |
| 29 | |
| 30 | /** Set the filter sequence. */ |
| 31 | private Collection<Measurement> filteringTheMeasurements( |
| 32 | Collection<Measurement> measuremts) { |
| 33 | |
| 34 | // Exit constraint. |
| 35 | if (factories.isEmpty() || count == factories.size()) { |
| 36 | // set counter of 0 |
| 37 | resetCount(); |
| 38 | return measuremts; |
| 39 | } |
| 40 | factory = factories.get(count++); |
| 41 | |
| 42 | AbstractMeasurementsCollection filteredCollection; |
| 43 | |
| 44 | if (factory.canFilter(measuremts, |
| 45 | getProperty(factory.getProperties()))) { |
| 46 | filteredCollection = factory.getFilteredCollection(measuremts, |
| 47 | getProperty(factory.getProperties())); |
| 48 | } else { |
| 49 | // set the minimal value for filtering attribute |
| 50 | filteredCollection = factory.getFilteredCollection(measuremts, |
| 51 | factory.convertToType("0")); |
| 52 | } |
| 53 | |
| 54 | // call it self with another filtered collection |
| 55 | return filteringTheMeasurements(filteredCollection); |
| 56 | } |
| 57 | |
| 58 | /** Get the value of first property. */ |
| 59 | private Number getProperty(Properties properties) { |
| 60 | // get the attribute description |
| 61 | String desc = properties.propertyNames().nextElement().toString(); |
| 62 | // get attribute |
| 63 | return (Number) properties.get(desc); |
| 64 | } |
| 65 | |
| 66 | public void addFactory(IFilteredCollectionFactory factory) { |
| 67 | factories.add(factory); |
| 68 | } |
| 69 | |
| 70 | public void removeFactory(IFilteredCollectionFactory factory){ |
| 71 | factories.remove(factory); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * @return the factories |
| 76 | */ |
| 77 | public ArrayList<IFilteredCollectionFactory> getFactories() { |
| 78 | return factories; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * @param factories the factories to set |
| 83 | */ |
| 84 | public void setFactories(ArrayList<IFilteredCollectionFactory> factories) { |
| 85 | this.factories = factories; |
| 86 | } |
| 87 | |
| 88 | /** The method is used for control of the filtered collection sequence. */ |
| 89 | public void resetCount() { |
| 90 | count = 0; |
| 91 | } |
| 92 | } |