/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.eclipse.core.ui;
import org.drools.eclipse.core.DroolsElement;
import org.drools.eclipse.core.Rule;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
/**
* Content provider for Drools model elements.
*/
public class DroolsContentProvider implements ITreeContentProvider {
public Object[] getChildren(Object parentElement) {
if (parentElement instanceof Rule) {
Rule rule = (Rule) parentElement;
if (rule.getGroup()==null) {
return new Object[]{};
}
return new Object[]{rule.getGroup()};
}
if (parentElement instanceof DroolsElement) {
return ((DroolsElement) parentElement).getChildren();
}
return new Object[0];
}
public Object getParent(Object element) {
if (element instanceof DroolsElement) {
return ((DroolsElement) element).getParent();
}
return null;
}
public boolean hasChildren(Object element) {
return getChildren(element).length > 0;
}
public Object[] getElements(Object inputElement) {
return getChildren(inputElement);
}
public void dispose() {
// do nothing
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
// do nothing
}
}