325N/A * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 325N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 325N/A * This code is free software; you can redistribute it and/or modify it 325N/A * under the terms of the GNU General Public License version 2 only, as 325N/A * published by the Free Software Foundation. Oracle designates this 325N/A * particular file as subject to the "Classpath" exception as provided 325N/A * by Oracle in the LICENSE file that accompanied this code. 325N/A * This code is distributed in the hope that it will be useful, but WITHOUT 325N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 325N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 325N/A * version 2 for more details (a copy is included in the LICENSE file that 325N/A * accompanied this code). 325N/A * You should have received a copy of the GNU General Public License version 325N/A * 2 along with this work; if not, write to the Free Software Foundation, 325N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 325N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 325N/A * or visit www.oracle.com if you need additional information or have any 325N/A * A special policy implementation that assures that only no or single policy alternative is possible within this type of policy. 325N/A * @author Marek Potociar 325N/A * Returns the AssertionSet instance representing a single policy alterantive held wihtin this nested policy object. 325N/A * If the nested policy represents a policy with no alternatives (i.e. nothing is allowed) the method returns {@code null}. 325N/A * @return nested policy alternative represented by AssertionSet object. May return {@code null} in case the nested policy 325N/A * represents 'nothing allowed' policy. 325N/A * An {@code Object.equals(Object obj)} method override. 325N/A * An {@code Object.toString()} method override. 325N/A * A helper method that appends indented string representation of this instance to the input string buffer. 325N/A * @param indentLevel indentation level to be used. 325N/A * @param buffer buffer to be used for appending string representation of this instance 325N/A * @return modified buffer containing new string representation of the instance