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Micro Distribution of the Payara Project for IBM JDK
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.security.integration;

import java.security.Permission;
import java.security.UnresolvedPermission;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Constructor;

//this implementation is based on sun.security.provider.PolicyFile.java
public class PermissionCreator {

    private static final Class[] PARAMS0 = { };
    private static final Class[] PARAMS1 = { String.class };
    private static final Class[] PARAMS2 = { String.class, String.class };

    @SuppressWarnings("unused")
    public static final Permission getInstance(String type, String name,
            String actions) throws ClassNotFoundException,
            InstantiationException, IllegalAccessException,
            NoSuchMethodException, InvocationTargetException {

        Class pc = null;
        
        try {
            pc = Class.forName(type, true, 
                Thread.currentThread().getContextClassLoader());
        } catch (ClassNotFoundException e) {
            //this class is not recognized 
            Permission pm = new UnresolvedPermission(type, name, actions, null);
            return pm;  // policy provider suppose to translate this permission later
        }
        
        if (name == null && actions == null) {
            try {
                Constructor c = pc.getConstructor(PARAMS0);
                return (Permission) c.newInstance(new Object[] {});
            } catch (NoSuchMethodException ne) {
                try {
                    Constructor c = pc.getConstructor(PARAMS1);
                    return (Permission) c.newInstance(new Object[] { name });
                } catch (NoSuchMethodException ne1) {
                    Constructor c = pc.getConstructor(PARAMS2);
                    return (Permission) c.newInstance(new Object[] { name,
                            actions });
                }
            }
        } else {
            if (name != null && actions == null) {
                try {
                    Constructor c = pc.getConstructor(PARAMS1);
                    return (Permission) c.newInstance(new Object[] { name });
                } catch (NoSuchMethodException ne) {
                    Constructor c = pc.getConstructor(PARAMS2);
                    return (Permission) c.newInstance(new Object[] { name,
                            actions });
                }
            } else {
                Constructor c = pc.getConstructor(PARAMS2);
                return (Permission) c
                        .newInstance(new Object[] { name, actions });
            }
        }
    }
    
}