package com.sun.javafx.binding;
import javafx.beans.WeakListener;
import javafx.collections.*;
import java.lang.ref.WeakReference;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class ContentBinding {
private static void checkParameters(Object property1, Object property2) {
if ((property1 == null) || (property2 == null)) {
throw new NullPointerException("Both parameters must be specified.");
}
if (property1 == property2) {
throw new IllegalArgumentException("Cannot bind object to itself");
}
}
public static <E> Object bind(List<E> list1, ObservableList<? extends E> list2) {
checkParameters(list1, list2);
final ListContentBinding<E> contentBinding = new ListContentBinding<E>(list1);
if (list1 instanceof ObservableList) {
((ObservableList) list1).setAll(list2);
} else {
list1.clear();
list1.addAll(list2);
}
list2.removeListener(contentBinding);
list2.addListener(contentBinding);
return contentBinding;
}
public static <E> Object bind(Set<E> set1, ObservableSet<? extends E> set2) {
checkParameters(set1, set2);
final SetContentBinding<E> contentBinding = new SetContentBinding<E>(set1);
set1.clear();
set1.addAll(set2);
set2.removeListener(contentBinding);
set2.addListener(contentBinding);
return contentBinding;
}
public static <K, V> Object bind(Map<K, V> map1, ObservableMap<? extends K, ? extends V> map2) {
checkParameters(map1, map2);
final MapContentBinding<K, V> contentBinding = new MapContentBinding<K, V>(map1);
map1.clear();
map1.putAll(map2);
map2.removeListener(contentBinding);
map2.addListener(contentBinding);
return contentBinding;
}
public static void unbind(Object obj1, Object obj2) {
checkParameters(obj1, obj2);
if ((obj1 instanceof List) && (obj2 instanceof ObservableList)) {
((ObservableList)obj2).removeListener(new ListContentBinding((List)obj1));
} else if ((obj1 instanceof Set) && (obj2 instanceof ObservableSet)) {
((ObservableSet)obj2).removeListener(new SetContentBinding((Set)obj1));
} else if ((obj1 instanceof Map) && (obj2 instanceof ObservableMap)) {
((ObservableMap)obj2).removeListener(new MapContentBinding((Map)obj1));
}
}
private static class ListContentBinding<E> implements ListChangeListener<E>, WeakListener {
private final WeakReference<List<E>> listRef;
public ListContentBinding(List<E> list) {
this.listRef = new WeakReference<List<E>>(list);
}
@Override
public void onChanged(Change<? extends E> change) {
final List<E> list = listRef.get();
if (list == null) {
change.getList().removeListener(this);
} else {
while (change.next()) {
if (change.wasPermutated()) {
list.subList(change.getFrom(), change.getTo()).clear();
list.addAll(change.getFrom(), change.getList().subList(change.getFrom(), change.getTo()));
} else {
if (change.wasRemoved()) {
list.subList(change.getFrom(), change.getFrom() + change.getRemovedSize()).clear();
}
if (change.wasAdded()) {
list.addAll(change.getFrom(), change.getAddedSubList());
}
}
}
}
}
@Override
public boolean wasGarbageCollected() {
return listRef.get() == null;
}
@Override
public int hashCode() {
final List<E> list = listRef.get();
return (list == null)? 0 : list.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
final List<E> list1 = listRef.get();
if (list1 == null) {
return false;
}
if (obj instanceof ListContentBinding) {
final ListContentBinding<?> other = (ListContentBinding<?>) obj;
final List<?> list2 = other.listRef.get();
return list1 == list2;
}
return false;
}
}
private static class SetContentBinding<E> implements SetChangeListener<E>, WeakListener {
private final WeakReference<Set<E>> setRef;
public SetContentBinding(Set<E> set) {
this.setRef = new WeakReference<Set<E>>(set);
}
@Override
public void onChanged(Change<? extends E> change) {
final Set<E> set = setRef.get();
if (set == null) {
change.getSet().removeListener(this);
} else {
if (change.wasRemoved()) {
set.remove(change.getElementRemoved());
} else {
set.add(change.getElementAdded());
}
}
}
@Override
public boolean wasGarbageCollected() {
return setRef.get() == null;
}
@Override
public int hashCode() {
final Set<E> set = setRef.get();
return (set == null)? 0 : set.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
final Set<E> set1 = setRef.get();
if (set1 == null) {
return false;
}
if (obj instanceof SetContentBinding) {
final SetContentBinding<?> other = (SetContentBinding<?>) obj;
final Set<?> set2 = other.setRef.get();
return set1 == set2;
}
return false;
}
}
private static class MapContentBinding<K, V> implements MapChangeListener<K, V>, WeakListener {
private final WeakReference<Map<K, V>> mapRef;
public MapContentBinding(Map<K, V> map) {
this.mapRef = new WeakReference<Map<K, V>>(map);
}
@Override
public void onChanged(Change<? extends K, ? extends V> change) {
final Map<K, V> map = mapRef.get();
if (map == null) {
change.getMap().removeListener(this);
} else {
if (change.wasRemoved()) {
map.remove(change.getKey());
}
if (change.wasAdded()) {
map.put(change.getKey(), change.getValueAdded());
}
}
}
@Override
public boolean wasGarbageCollected() {
return mapRef.get() == null;
}
@Override
public int hashCode() {
final Map<K, V> map = mapRef.get();
return (map == null)? 0 : map.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
final Map<K, V> map1 = mapRef.get();
if (map1 == null) {
return false;
}
if (obj instanceof MapContentBinding) {
final MapContentBinding<?, ?> other = (MapContentBinding<?, ?>) obj;
final Map<?, ?> map2 = other.mapRef.get();
return map1 == map2;
}
return false;
}
}
}
ContentBinding
