23  * questions.
  24  */
  25 
  26 package javafx.collections.transformation;
  27 
  28 import com.sun.javafx.collections.NonIterableChange.GenericAddRemoveChange;
  29 import com.sun.javafx.collections.SortHelper;
  30 import java.util.ArrayList;
  31 import java.util.Arrays;
  32 import java.util.Iterator;
  33 import java.util.List;
  34 import java.util.ListIterator;
  35 import java.util.function.Predicate;
  36 import javafx.beans.NamedArg;
  37 import javafx.beans.property.ObjectProperty;
  38 import javafx.beans.property.ObjectPropertyBase;
  39 import javafx.collections.ListChangeListener.Change;
  40 import javafx.collections.ObservableList;
  41 
  42 /**
  43  * Wraps an ObservableList and filters it's content using the provided Predicate.
  44  * All changes in the ObservableList are propagated immediately
  45  * to the FilteredList.
  46  *
  47  * @see TransformationList
  48  * @since JavaFX 8.0
  49  */
  50 public final class FilteredList<E> extends TransformationList<E, E>{
  51 
  52     private int[] filtered;
  53     private int size;
  54 
  55     private SortHelper helper;
  56     private static final Predicate ALWAYS_TRUE = t -> true;
  57 
  58     /**
  59      * Constructs a new FilteredList wrapper around the source list.
  60      * The provided predicate will match the elements in the source list that will be visible.
  61      * If the predicate is null, all elements will be matched and the list is equal to the source list.
  62      * @param source the source list
  63      * @param predicate the predicate to match the elements or null to match all elements.

  23  * questions.
  24  */
  25 
  26 package javafx.collections.transformation;
  27 
  28 import com.sun.javafx.collections.NonIterableChange.GenericAddRemoveChange;
  29 import com.sun.javafx.collections.SortHelper;
  30 import java.util.ArrayList;
  31 import java.util.Arrays;
  32 import java.util.Iterator;
  33 import java.util.List;
  34 import java.util.ListIterator;
  35 import java.util.function.Predicate;
  36 import javafx.beans.NamedArg;
  37 import javafx.beans.property.ObjectProperty;
  38 import javafx.beans.property.ObjectPropertyBase;
  39 import javafx.collections.ListChangeListener.Change;
  40 import javafx.collections.ObservableList;
  41 
  42 /**
  43  * Wraps an ObservableList and filters its content using the provided Predicate.
  44  * All changes in the ObservableList are propagated immediately
  45  * to the FilteredList.
  46  *
  47  * @see TransformationList
  48  * @since JavaFX 8.0
  49  */
  50 public final class FilteredList<E> extends TransformationList<E, E>{
  51 
  52     private int[] filtered;
  53     private int size;
  54 
  55     private SortHelper helper;
  56     private static final Predicate ALWAYS_TRUE = t -> true;
  57 
  58     /**
  59      * Constructs a new FilteredList wrapper around the source list.
  60      * The provided predicate will match the elements in the source list that will be visible.
  61      * If the predicate is null, all elements will be matched and the list is equal to the source list.
  62      * @param source the source list
  63      * @param predicate the predicate to match the elements or null to match all elements.