com.sun.syndication.propono.blogclient.BlogConnectionFactory Maven / Gradle / Ivy

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The ROME Propono subproject is a Java class library that supports publishing protocols, specifically the Atom Publishing Protocol and the legacy MetaWeblog API. Propono includes an Atom client library, Atom server framework and a Blog client that supports both Atom protocol and the MetaWeblog API.

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/*   
 *  Copyright 2007 Dave Johnson (Blogapps project)
 * 
 * Licensed 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 com.sun.syndication.propono.blogclient;

import java.lang.reflect.Constructor;

/**
 * Entry point to the Blogapps blog client library.
 */
public class BlogConnectionFactory { 
    
    // BlogConnection implementations must:
    // 1) implement BlogConnection
    // 2) privide contructor that accepts three strings args: url, username and password.
    
    // TODO: make implementations configurable
    private static String ATOMPROTOCOL_IMPL_CLASS = 
        "com.sun.syndication.propono.blogclient.atomprotocol.AtomConnection";
    
    private static String METAWEBLOG_IMPL_CLASS = 
        "com.sun.syndication.propono.blogclient.metaweblog.MetaWeblogConnection";
            
   /**
    * Create a connection to a blog server.
    * @param type     Connection type, must be "atom" or "metaweblog"
    * @param url      End-point URL to connect to
    * @param username Username for login to blog server
    * @param password Password for login to blog server
    */
   public static BlogConnection getBlogConnection(
      String type, String url, String username, String password) 
      throws BlogClientException {
      BlogConnection blogConnection = null;
      if (type == null || type.equals("metaweblog")) {
         blogConnection = createBlogConnection(
                 METAWEBLOG_IMPL_CLASS, url, username, password);
      } else if (type.equals("atom")) {
         blogConnection = createBlogConnection(
                 ATOMPROTOCOL_IMPL_CLASS, url, username, password);
      } else {
          throw new BlogClientException("Type must be 'atom' or 'metaweblog'");
      }
      return blogConnection;
   }
   
   private static BlogConnection createBlogConnection(
           String className, String url, String username, String password)
           throws BlogClientException {
       Class conClass;
       try {
           conClass = Class.forName(className);
       } catch (ClassNotFoundException ex) {
           throw new BlogClientException(
                   "BlogConnection impl. class not found: "+className, ex);
       }
       Class[] args = new Class[] {String.class, String.class, String.class};
       Constructor ctor;
       try {
           ctor = conClass.getConstructor(args);
           return (BlogConnection)
           ctor.newInstance(new Object[] {url, username, password});
       } catch (Throwable t) {
           throw new BlogClientException(
                   "ERROR instantiating BlogConnection impl.", t);
       }
   }
}