1 files changed, 100 insertions, 0 deletions
diff --git a/pki/base/util/src/netscape/security/acl/OwnerImpl.java b/pki/base/util/src/netscape/security/acl/OwnerImpl.java
new file mode 100644
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+++ b/pki/base/util/src/netscape/security/acl/OwnerImpl.java
@@ -0,0 +1,100 @@
+// --- BEGIN COPYRIGHT BLOCK ---
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; version 2 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// (C) 2007 Red Hat, Inc.
+// All rights reserved.
+// --- END COPYRIGHT BLOCK ---
+package netscape.security.acl;
+
+import java.util.*;
+import java.security.*;
+import java.security.acl.*;
+
+/**
+ * Class implementing the Owner interface. The
+ * initial owner principal is configured as 
+ * part of the constructor.
+ * @author 	Satish Dharmaraj
+ */
+public class OwnerImpl implements Owner {
+    private Group ownerGroup;
+
+    public OwnerImpl(Principal owner) {
+	ownerGroup = new GroupImpl("AclOwners");
+	ownerGroup.addMember(owner);
+    }
+
+    /**
+     * Adds an owner. Owners can modify ACL contents and can disassociate 
+     * ACLs from the objects they protect in the AclConfig interface.
+     * The caller principal must be a part of the owners list of the ACL in 
+     * order to invoke this method. The initial owner is configured
+     * at ACL construction time. 
+     * @param caller the principal who is invoking this method. 
+     * @param owner The owner that should be added to the owners list.
+     * @return true if success, false if already an owner.
+     * @exception NotOwnerException if the caller principal is not on 
+     * the owners list of the Acl.
+     */
+    public synchronized boolean addOwner(Principal caller, Principal owner)
+      throws NotOwnerException
+    {
+	if (!isOwner(caller))
+	    throw new NotOwnerException();
+
+	ownerGroup.addMember(owner);
+	return false;
+    }
+
+    /** 
+     * Delete owner. If this is the last owner in the ACL, an exception is 
+     * raised.
+     * The caller principal must be a part of the owners list of the ACL in 
+     * order to invoke this method. 
+     * @param caller the principal who is invoking this method. 
+     * @param owner The owner to be removed from the owners list.
+     * @return true if the owner is removed, false if the owner is not part 
+     * of the owners list.
+     * @exception NotOwnerException if the caller principal is not on 
+     * the owners list of the Acl.
+     * @exception LastOwnerException if there is only one owner left in the group, then
+     * deleteOwner would leave the ACL owner-less. This exception is raised in such a case.
+     */
+    public synchronized boolean deleteOwner(Principal caller, Principal owner) 
+      throws NotOwnerException, LastOwnerException
+    {
+	if (!isOwner(caller))
+	    throw new NotOwnerException();
+	
+	Enumeration e = ownerGroup.members();
+	//
+	// check if there is atleast 2 members left.
+	//
+	Object o = e.nextElement();
+	if (e.hasMoreElements()) 
+	    return ownerGroup.removeMember(owner);
+	else
+	    throw new LastOwnerException();
+	    
+    }   
+
+    /**
+     * returns if the given principal belongs to the owner list.
+     * @param owner The owner to check if part of the owners list
+     * @return true if the passed principal is in the owner list, false if not.
+     */
+    public synchronized boolean isOwner(Principal owner) {
+	return ownerGroup.isMember(owner);
+    }
+}