aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.ws.policy;
aoqi@0: 
aoqi@0: import java.util.Arrays;
aoqi@0: import java.util.Iterator;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * A special policy implementation that assures that only no or single policy alternative is possible within this type of policy.
aoqi@0:  *
aoqi@0:  * @author Marek Potociar
aoqi@0:  */
aoqi@0: public final class NestedPolicy extends Policy {
aoqi@0:     private static final String NESTED_POLICY_TOSTRING_NAME = "nested policy";
aoqi@0: 
aoqi@0:     private NestedPolicy(final AssertionSet set) {
aoqi@0:         super(NESTED_POLICY_TOSTRING_NAME, Arrays.asList(new AssertionSet[] { set }));
aoqi@0:     }
aoqi@0: 
aoqi@0:     private NestedPolicy(final String name, final String policyId, final AssertionSet set) {
aoqi@0:         super(NESTED_POLICY_TOSTRING_NAME, name, policyId, Arrays.asList(new AssertionSet[] { set }));
aoqi@0:     }
aoqi@0: 
aoqi@0:     static NestedPolicy createNestedPolicy(final AssertionSet set) {
aoqi@0:         return new NestedPolicy(set);
aoqi@0:     }
aoqi@0: 
aoqi@0:     static NestedPolicy createNestedPolicy(final String name, final String policyId, final AssertionSet set) {
aoqi@0:         return new NestedPolicy(name, policyId, set);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns the AssertionSet instance representing a single policy alterantive held wihtin this nested policy object.
aoqi@0:      * If the nested policy represents a policy with no alternatives (i.e. nothing is allowed) the method returns {@code null}.
aoqi@0:      *
aoqi@0:      * @return nested policy alternative represented by AssertionSet object. May return {@code null} in case the nested policy
aoqi@0:      * represents 'nothing allowed' policy.
aoqi@0:      */
aoqi@0:     public AssertionSet getAssertionSet() {
aoqi@0:         final Iterator<AssertionSet> iterator = iterator();
aoqi@0:         if (iterator.hasNext()) {
aoqi@0:             return iterator.next();
aoqi@0:         } else {
aoqi@0:             return null;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * An {@code Object.equals(Object obj)} method override.
aoqi@0:      */
aoqi@0:     @Override
aoqi@0:     public boolean equals(final Object obj) {
aoqi@0:         if (this == obj) {
aoqi@0:             return true;
aoqi@0:         }
aoqi@0: 
aoqi@0:         if (!(obj instanceof NestedPolicy)) {
aoqi@0:             return false;
aoqi@0:         }
aoqi@0: 
aoqi@0:         final NestedPolicy that = (NestedPolicy) obj;
aoqi@0: 
aoqi@0:         return super.equals(that);
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public int hashCode() {
aoqi@0:         return super.hashCode();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * An {@code Object.toString()} method override.
aoqi@0:      */
aoqi@0:     @Override
aoqi@0:     public String toString() {
aoqi@0:         return toString(0, new StringBuffer()).toString();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * A helper method that appends indented string representation of this instance to the input string buffer.
aoqi@0:      *
aoqi@0:      * @param indentLevel indentation level to be used.
aoqi@0:      * @param buffer buffer to be used for appending string representation of this instance
aoqi@0:      * @return modified buffer containing new string representation of the instance
aoqi@0:      */
aoqi@0:     @Override
aoqi@0:     StringBuffer toString(final int indentLevel, final StringBuffer buffer) {
aoqi@0:         return super.toString(indentLevel, buffer);
aoqi@0:     }
aoqi@0: }