/*******************************************************************************
* Copyright (c) 2010 Neil Bartlett.
* 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 Bartlett - initial API and implementation
******************************************************************************/
package bndtools.utils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.osgi.util.function.Predicate;
public class SelectionUtils {
public static <T> Collection<T> getSelectionMembers(ISelection selection, Class<T> clazz) throws Exception {
return getSelectionMembers(selection, clazz, null);
}
public static <T> T adaptObject(Object obj, Class<T> clazz) {
if (clazz.isInstance(obj)) {
@SuppressWarnings("unchecked")
T result = (T) obj;
return result;
}
if (obj instanceof IAdaptable) {
@SuppressWarnings("unchecked")
T result = (T) ((IAdaptable) obj).getAdapter(clazz);
return result;
}
return null;
}
public static <T> Collection<T> getSelectionMembers(ISelection selection, Class<T> clazz, Predicate< ? super T> filter) throws Exception {
if (selection.isEmpty() || !(selection instanceof IStructuredSelection)) {
return Collections.emptyList();
}
IStructuredSelection structSel = (IStructuredSelection) selection;
List<T> result = new ArrayList<T>(structSel.size());
Iterator< ? > iter = structSel.iterator();
while (iter.hasNext()) {
Object element = iter.next();
if (clazz.isInstance(element)) {
@SuppressWarnings("unchecked")
T casted = (T) element;
if (filter == null || filter.test(casted)) {
result.add(casted);
}
} else if (element instanceof IAdaptable) {
@SuppressWarnings("unchecked")
T adapted = (T) ((IAdaptable) element).getAdapter(clazz);
if (adapted != null) {
if (filter == null || filter.test(adapted)) {
result.add(adapted);
}
}
}
}
return result;
}
}