/*******************************************************************************
* Copyright (c) 2005, 2017 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.tests.viewers;
import org.eclipse.jface.viewers.ILazyTreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.junit.Assert;
public class TestModelLazyTreeContentProvider extends TestModelContentProvider
implements ILazyTreeContentProvider {
private final TreeViewer treeViewer;
public TestModelLazyTreeContentProvider(TreeViewer treeViewer) {
this.treeViewer = treeViewer;
}
@Override
public void updateElement(Object parent, int index) {
TestElement parentElement = (TestElement) parent;
if(parentElement.getChildCount() > index) {
TestElement childElement = parentElement.getChildAt(index);
treeViewer.replace(parent, index, childElement);
treeViewer.setChildCount(childElement, childElement.getChildCount());
}
}
@Override
public Object[] getChildren(Object element) {
Assert.fail("should not be called on a LazyTreeContentProvider");
return null;
}
@Override
public Object[] getElements(Object element) {
Assert.fail("should not be called on a LazyTreeContentProvider");
return null;
}
@Override
public boolean hasChildren(Object element) {
Assert.fail("should not be called on a LazyTreeContentProvider");
return false;
}
@Override
public void inputChanged(Viewer viewer, Object oldInput,
final Object newInput) {
super.inputChanged(viewer, oldInput, newInput);
}
@Override
public void updateChildCount(Object element, int currentChildCount) {
treeViewer.setChildCount(element, ((TestElement) element).getChildCount());
}
}