| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.qpid; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.StringTokenizer; |
| |
| import org.apache.qpid.security.AMQPCallbackHandler; |
| import org.apache.qpid.security.CallbackHandlerRegistry; |
| |
| public class SecurityHelper |
| { |
| public static String chooseMechanism(List<Object> mechanisms) throws UnsupportedEncodingException |
| { |
| HashSet mechanismSet = new HashSet(); |
| for (Object m : mechanisms) |
| { |
| mechanismSet.add(m); |
| } |
| |
| String preferredMechanisms = CallbackHandlerRegistry.getInstance().getMechanisms(); |
| StringTokenizer prefTokenizer = new StringTokenizer(preferredMechanisms, " "); |
| while (prefTokenizer.hasMoreTokens()) |
| { |
| String mech = prefTokenizer.nextToken(); |
| if (mechanismSet.contains(mech)) |
| { |
| return mech; |
| } |
| } |
| return null; |
| } |
| |
| public static AMQPCallbackHandler createCallbackHandler(String mechanism, String username,String password) |
| throws QpidException |
| { |
| Class mechanismClass = CallbackHandlerRegistry.getInstance().getCallbackHandlerClass(mechanism); |
| try |
| { |
| Object instance = mechanismClass.newInstance(); |
| AMQPCallbackHandler cbh = (AMQPCallbackHandler) instance; |
| cbh.initialise(username,password); |
| return cbh; |
| } |
| catch (Exception e) |
| { |
| throw new QpidException("Unable to create callback handler: " + e,ErrorCode.UNDEFINED, e.getCause()); |
| } |
| } |
| |
| } |