/*******************************************************************************
* Copyright (c) 2007, Angelo Zerr and others
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - Initial API and implementation
*******************************************************************************/
package org.eclipse.ufacekit.ui.swing.databinding.internal.swing;
import org.eclipse.core.databinding.BindingException;
import org.eclipse.core.databinding.observable.Diffs;
import org.eclipse.core.databinding.observable.ObservableTracker;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.list.AbstractObservableList;
/**
* Abstract base class of ComboObservableList and ListObservableList.
*
*/
public abstract class SwingObservableList extends AbstractObservableList {
/**
*
*/
public SwingObservableList() {
super();
}
/**
* @param realm
*/
public SwingObservableList(Realm realm) {
super(realm);
}
public void add(int index, Object element) {
int size = doGetSize();
if (index < 0 || index > size)
index = size;
String[] newItems = new String[size + 1];
System.arraycopy(getItems(), 0, newItems, 0, index);
newItems[index] = (String) element;
System.arraycopy(getItems(), index, newItems, index + 1, size - index);
setItems(newItems);
fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
true, element)));
}
public int doGetSize() {
return getItemCount();
}
public Object get(int index) {
getterCalled();
return getItem(index);
}
public Object getElementType() {
return Object.class;
}
/**
* @param index
* @return the item at the given index
*/
protected abstract Object getItem(int index);
/**
* @return the item count
*/
protected abstract int getItemCount();
/**
* @return the items
*/
protected abstract Object[] getItems();
private void getterCalled() {
ObservableTracker.getterCalled(this);
}
public Object remove(int index) {
getterCalled();
int size = doGetSize();
if (index < 0 || index > size - 1)
throw new BindingException(
"Request to remove an element out of the collection bounds"); //$NON-NLS-1$
Object[] newItems = new Object[size - 1];
Object oldElement = getItem(index);
if (newItems.length > 0) {
System.arraycopy(getItems(), 0, newItems, 0, index);
if (size - 1 > index) {
System.arraycopy(getItems(), index + 1, newItems, index, size
- index - 1);
}
}
setItems(newItems);
fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
false, oldElement)));
return oldElement;
}
public Object set(int index, Object element) {
Object oldElement = getItem(index);
setItem(index, (String) element);
fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
false, oldElement), Diffs.createListDiffEntry(index, true,
element)));
return oldElement;
}
/**
* @param index
* @param string
*/
protected abstract void setItem(int index, Object string);
/**
* @param newItems
*/
protected abstract void setItems(Object[] newItems);
}