/*******************************************************************************
* Copyright (c) 2013 Red Hat Inc. 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:
* Neil Guzman - initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.internal.rpm.createrepo.tree;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
/**
* The content provider for the category tree in the metadata form page.
*/
public class CreaterepoTreeContentProvider implements ITreeContentProvider {
private CreaterepoCategoryModel model;
@Override
public void dispose() {/* not implemented */}
@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
if (newInput instanceof CreaterepoCategoryModel) {
model = (CreaterepoCategoryModel) newInput;
}
}
@Override
public Object[] getElements(Object inputElement) {
return model.getCategories().toArray();
}
@Override
public Object[] getChildren(Object parentElement) {
if (parentElement instanceof CreaterepoTreeCategory) {
CreaterepoTreeCategory category = (CreaterepoTreeCategory) parentElement;
return category.getTags().toArray();
}
return null;
}
@Override
public Object getParent(Object element) {
return null;
}
@Override
public boolean hasChildren(Object element) {
if (element instanceof CreaterepoTreeCategory) {
CreaterepoTreeCategory category = (CreaterepoTreeCategory) element;
// category has children if ! empty
return !category.getTags().isEmpty();
}
return false;
}
}