001    /**
002     * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
003     * Licensed under the Apache License, Version 2.0 (the "License");
004     * you may not use this file except in compliance with the License.
005     * You may obtain a copy of the License at
006     *
007     *   http://www.apache.org/licenses/LICENSE-2.0
008     *
009     *  Unless required by applicable law or agreed to in writing, software
010     *  distributed under the License is distributed on an "AS IS" BASIS,
011     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012     *  See the License for the specific language governing permissions and
013     *  limitations under the License. See accompanying LICENSE file.
014     */
015    package org.apache.oozie.servlet;
016    
017    import javax.servlet.http.HttpServletResponse;
018    
019    import org.apache.oozie.ErrorCode;
020    
021    public class ServletUtilities {
022    
023        /**
024         * accessory static method to check the app path parameter for the request
025         * used only for job-related request and only one of them should exist
026         * 
027         * @param wfPath workflow app path
028         * @param coordPath coordinator app path
029         * @throws XServletException
030         */
031        protected static void ValidateAppPath(String wfPath, String coordPath) throws XServletException {
032            if (wfPath != null && coordPath != null) {
033                throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ErrorCode.E0301, wfPath, coordPath);
034            }
035            else {
036                if (wfPath == null && coordPath == null) {
037                    throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ErrorCode.E0302);
038                }
039            }
040        }
041    
042        /**
043         * accessory static method to check the app path parameter for the request
044         * used only for job-related request and only one of them should exist
045         * bundle appPath is also checked
046         * 
047         * @param wfPath workflow app path
048         * @param coordPath coordinator app path
049         * @param bundlePath bundle app path
050         * @throws XServletException
051         */
052        protected static void ValidateAppPath(String wfPath, String coordPath, String bundlePath) throws XServletException {
053            int n = 0;
054            
055            if (wfPath != null) {
056                n ++;
057            }
058            
059            if (coordPath != null) {
060                n ++;
061            }
062            
063            if (bundlePath != null) {
064                n ++;
065            }
066            
067            if (n != 1) {
068                throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ErrorCode.E0302);
069            }
070        }
071    
072        /**
073         * accessory static method to check the lib path parameter for the request
074         * 
075         * @param libPath lib path
076         * @throws XServletException
077         */
078        protected static void ValidateLibPath(String libPath) throws XServletException {
079            if (libPath == null) {
080                throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ErrorCode.E0302);
081            }
082        }
083    }