/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.security;
import org.acegisecurity.Authentication;
import org.acegisecurity.acls.sid.Sid;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
import static java.util.logging.Level.FINE;
/**
* Access control list.
*
* @author Kohsuke Kawaguchi
*/
public class SparseACL extends SidACL {
public static final class Entry {
// Sid has value-equality semantics
public final Sid sid;
public final Permission permission;
public final boolean allowed;
public Entry(Sid sid, Permission permission, boolean allowed) {
this.sid = sid;
this.permission = permission;
this.allowed = allowed;
}
}
private final List<Entry> entries = new ArrayList<Entry>();
/**
* Parent to delegate to. Can be null.
*/
private ACL parent;
public SparseACL(ACL parent) {
this.parent = parent;
}
public void add(Entry e) {
entries.add(e);
}
public void add(Sid sid, Permission permission, boolean allowed) {
add(new Entry(sid,permission,allowed));
}
@Override
public boolean hasPermission(Authentication a, Permission permission) {
if(a==SYSTEM) return true;
Boolean b = _hasPermission(a,permission);
if(b!=null) return b;
if(parent!=null) {
if(LOGGER.isLoggable(FINE))
LOGGER.fine("hasPermission("+a+","+permission+") is delegating to parent ACL: "+parent);
return parent.hasPermission(a,permission);
}
// the ultimate default is to reject everything
return false;
}
@Override
protected Boolean hasPermission(Sid p, Permission permission) {
for( ; permission!=null; permission=permission.impliedBy ) {
for (Entry e : entries) {
if(e.permission==permission && e.sid.equals(p))
return e.allowed;
}
}
return null;
}
private static final Logger LOGGER = Logger.getLogger(SparseACL.class.getName());
}