com.sun.javafx.collections.ObservableSequentialListWrapper Maven / Gradle / Ivy
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package com.sun.javafx.collections;
import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.NoSuchElementException;
import com.sun.javafx.collections.NonIterableChange.SimplePermutationChange;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.collections.ModifiableObservableListBase;
import javafx.util.Callback;
public class ObservableSequentialListWrapper extends ModifiableObservableListBase implements SortableList {
private final List backingList;
private final ElementObserver elementObserver;
public ObservableSequentialListWrapper(List list) {
backingList = list;
elementObserver = null;
}
public ObservableSequentialListWrapper(List list, Callback extractor) {
backingList = list;
this.elementObserver = new ElementObserver<>(extractor, new Callback() {
@Override
public InvalidationListener call(final E e) {
return new InvalidationListener() {
@Override
public void invalidated(Observable observable) {
beginChange();
int i = 0;
for (Iterator it = backingList.iterator(); it.hasNext();) {
if (it.next() == e) {
nextUpdate(i);
}
++i;
}
endChange();
}
};
}
}, this);
for (E e : backingList) {
elementObserver.attachListener(e);
}
}
@Override
public boolean contains(Object o) {
return backingList.contains(o);
}
@Override
public boolean containsAll(Collection c) {
return backingList.containsAll(c);
}
@Override
public int indexOf(Object o) {
return backingList.indexOf(o);
}
@Override
public int lastIndexOf(Object o) {
return backingList.lastIndexOf(o);
}
@Override
public ListIterator listIterator(final int index) {
return new ListIterator<>() {
private final ListIterator backingIt = backingList.listIterator(index);
private E lastReturned;
@Override
public boolean hasNext() {
return backingIt.hasNext();
}
@Override
public E next() {
return lastReturned = backingIt.next();
}
@Override
public boolean hasPrevious() {
return backingIt.hasPrevious();
}
@Override
public E previous() {
return lastReturned = backingIt.previous();
}
@Override
public int nextIndex() {
return backingIt.nextIndex();
}
@Override
public int previousIndex() {
return backingIt.previousIndex();
}
@Override
public void remove() {
beginChange();
int idx = previousIndex();
backingIt.remove();
nextRemove(idx, lastReturned);
endChange();
}
@Override
public void set(E e) {
beginChange();
int idx = previousIndex();
backingIt.set(e);
nextSet(idx, lastReturned);
endChange();
}
@Override
public void add(E e) {
beginChange();
int idx = nextIndex();
backingIt.add(e);
nextAdd(idx, idx + 1);
endChange();
}
};
}
@Override
public Iterator iterator() {
return listIterator();
}
@Override
public E get(int index) {
try {
return backingList.listIterator(index).next();
} catch (NoSuchElementException exc) {
throw new IndexOutOfBoundsException("Index: "+index);
}
}
@Override
public boolean addAll(int index, Collection c) {
if (index < 0 || index > size()) {
throw new IndexOutOfBoundsException("Index: " + index);
}
// implicit check to ensure c != null
if (c.isEmpty()) {
return false;
}
try {
beginChange();
boolean modified = false;
ListIterator e1 = listIterator(index);
Iterator e2 = c.iterator();
while (e2.hasNext()) {
e1.add(e2.next());
modified = true;
}
endChange();
return modified;
} catch (NoSuchElementException exc) {
throw new IndexOutOfBoundsException("Index: "+index);
}
}
@Override
public int size() {
return backingList.size();
}
@Override
protected void doAdd(int index, E element) {
try {
backingList.listIterator(index).add(element);
} catch (NoSuchElementException exc) {
throw new IndexOutOfBoundsException("Index: "+index);
}
}
@Override
protected E doSet(int index, E element) {
try {
ListIterator e = backingList.listIterator(index);
E oldVal = e.next();
e.set(element);
return oldVal;
} catch (NoSuchElementException exc) {
throw new IndexOutOfBoundsException("Index: "+index);
}
}
@Override
protected E doRemove(int index) {
try {
ListIterator e = backingList.listIterator(index);
E outCast = e.next();
e.remove();
return outCast;
} catch (NoSuchElementException exc) {
throw new IndexOutOfBoundsException("Index: "+index);
}
}
private SortHelper helper;
@Override
public void doSort(Comparator comparator) {
int[] perm = getSortHelper().sort(backingList, comparator);
fireChange(new SimplePermutationChange<>(0, size(), perm, this));
}
private SortHelper getSortHelper() {
if (helper == null) {
helper = new SortHelper();
}
return helper;
}
}