/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.felix.sigil.eclipse.ui.internal.views;
import org.apache.felix.sigil.common.model.osgi.IPackageExport;
import org.apache.felix.sigil.common.model.osgi.IPackageImport;
import org.apache.felix.sigil.common.model.osgi.IRequiredBundle;
import org.eclipse.jface.viewers.ContentViewer;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
public class ModelElementComparator extends ViewerComparator
{
private static final int EXPORT_GROUP = 0;
private static final int IMPORT_GROUP = 1;
private static final int REQUIRE_GROUP = 2;
private static final int OTHER_GROUP = 4;
public int category(Object element)
{
if (element instanceof IPackageImport)
{
return IMPORT_GROUP;
}
else if (element instanceof IPackageExport)
{
return EXPORT_GROUP;
}
else if (element instanceof IRequiredBundle)
{
return REQUIRE_GROUP;
}
else
{
return OTHER_GROUP;
}
}
@SuppressWarnings("unchecked")
@Override
public int compare(Viewer viewer, Object e1, Object e2)
{
int cat1 = category(e1);
int cat2 = category(e2);
if (cat1 != cat2)
{
return cat1 - cat2;
}
if (cat1 == OTHER_GROUP)
{
String name1;
String name2;
if (viewer == null || !(viewer instanceof ContentViewer))
{
name1 = e1.toString();
name2 = e2.toString();
}
else
{
IBaseLabelProvider prov = ((ContentViewer) viewer).getLabelProvider();
if (prov instanceof ILabelProvider)
{
ILabelProvider lprov = (ILabelProvider) prov;
name1 = lprov.getText(e1);
name2 = lprov.getText(e2);
}
else
{
name1 = e1.toString();
name2 = e2.toString();
}
}
if (name1 == null)
{
name1 = "";//$NON-NLS-1$
}
if (name2 == null)
{
name2 = "";//$NON-NLS-1$
}
// use the comparator to compare the strings
return getComparator().compare(name1, name2);
}
else
{
Comparable c1 = (Comparable) e1;
Comparable c2 = (Comparable) e2;
return c1.compareTo(c2);
}
}
}