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/*
* Copyright (c) 2013 Eike Stepper (Berlin, Germany) 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:
* Christian W. Damus (CEA LIST) - initial API and implementation
*/
package org.eclipse.emf.cdo.security.internal.ui.util;
import org.eclipse.emf.cdo.security.CombinedFilter;
import org.eclipse.emf.cdo.security.FilterPermission;
import org.eclipse.emf.cdo.security.Permission;
import org.eclipse.emf.cdo.security.PermissionFilter;
import org.eclipse.emf.cdo.security.ResourceFilter;
import org.eclipse.jface.viewers.IFilter;
/**
* A UI filter that selects {@link Permission}s that are
* resource-based permissions.
*
* @author Christian W. Damus (CEA LIST)
*/
public class ResourceBasedPermissionFilter implements IFilter
{
public ResourceBasedPermissionFilter()
{
}
public boolean select(Object element)
{
boolean result = element instanceof FilterPermission;
if (result)
{
FilterPermission perm = (FilterPermission)element;
for (PermissionFilter filter : perm.getFilters())
{
if (!isResourceFilter(filter))
{
result = false;
// TODO Should we break here?
}
}
}
return result;
}
protected boolean isResourceFilter(PermissionFilter filter)
{
boolean result = filter instanceof ResourceFilter;
if (!result && filter instanceof CombinedFilter)
{
result = true; // Assume all permission filters are OK
CombinedFilter combined = (CombinedFilter)filter;
for (PermissionFilter next : combined.getOperands())
{
result = isResourceFilter(next);
if (!result)
{
break;
}
}
}
return result;
}
}
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