/**

  * The contents of this file are subject to the Mozilla Public License Version 1.1

  * (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.mozilla.org/MPL/

  * Software distributed under the License is distributed on an "AS IS" basis,

  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the

  * specific language governing rights and limitations under the License.

  * <p>

  * The Original Code is "URLProfileStore.java".  Description:

  * "A read-only profile store that loads profiles from URLs."

  * <p>

  * The Initial Developer of the Original Code is University Health Network. Copyright (C)

  * 2003.  All Rights Reserved.

  * <p>

  * Contributor(s): ______________________________________.

  * <p>

  * Alternatively, the contents of this file may be used under the terms of the

  * GNU General Public License (the "GPL"), in which case the provisions of the GPL are

  * applicable instead of those above.  If you wish to allow use of your version of this

  * file only under the terms of the GPL and not to allow others to use your version

  * of this file under the MPL, indicate your decision by deleting  the provisions above

  * and replace  them with the notice and other provisions required by the GPL License.

  * If you do not delete the provisions above, a recipient may use your version of

  * this file under either the MPL or the GPL.

  */

 package ca.uhn.hl7v2.conf.store;

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.InputStreamReader;

 import java.net.MalformedURLException;

 import java.net.URL;

 /**

  * A read-only profile store that loads profiles from URLs.  The URL 

  * for a profile is determined by the method getURL().  An 

  * attempt is also made to write 

  * @author Bryan Tripp

  */

 public abstract class URLProfileStore extends ReadOnlyProfileStore {

     /** Creates a new instance of URLProfileStore */

     public URLProfileStore() {

     }

     /**

      * Retrieves profile from persistent storage (by ID).

      *

      * @param id profile id

      * @return profile content or null if profile could not be found

      */

     public String getProfile(String id) throws IOException {

         String profile = null;

         BufferedReader in = null;

         try {

             URL url = getURL(id);

             if (url != null) {

                 in = new BufferedReader(new InputStreamReader(url.openStream()));

                 StringBuilder buf = new StringBuilder();

                 int c;

                 while ((c = in.read()) != -1) {

                     buf.append((char) c);

                 }

                 profile = buf.toString();

             }

         } catch (MalformedURLException e) {

             throw new IOException("MalformedURLException: " + e.getMessage());

         } finally {

             if (in != null) in.close();

         }

         return profile;

     }

     /**

      * Returns the URL from which to read a profile given the profile ID.  For example

      * given "123" it could return ftp://hospital_x.org/hl7/123.xml, or 

      * http://hl7_conformance_service.com?profile=123.  

      */

     public abstract URL getURL(String ID) throws MalformedURLException;

     /** Stores profile in persistent storage with given ID.

      */

     /*public void persistProfile(String ID, String profile) throws IOException {

         try {

             URL url = getWriteURL(ID);

             if (url == null) {

                 throw new IOException("Can't persist profile -- this profile store is read-only");

             } else {

                 URLConnection uc = url.openConnection();

                 uc.connect();

                 uc.getOutputStream().write(profile.getBytes());

                 uc.getOutputStream().flush();

                 uc.getOutputStream().close();

             }

         } catch (MalformedURLException e) {

             throw new IOException("MalformedURLException: " + e.getMessage());

         }

     }*/

     /**

      * Returns the URL to which a profile should be written, given the 

      * profile ID.  This defaults to getReadURL() but can be over-ridden.  

      * For read-only stores, over-ride this method to return null.

      */

     /*public URL getWriteURL(String ID) throws MalformedURLException {

         return getReadURL(ID);

     }*/

 }