001 /**
002 * The contents of this file are subject to the Mozilla Public License Version 1.1
003 * (the "License"); you may not use this file except in compliance with the License.
004 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
005 * Software distributed under the License is distributed on an "AS IS" basis,
006 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
007 * specific language governing rights and limitations under the License.
008 *
009 * The Original Code is "URLProfileStore.java". Description:
010 * "A read-only profile store that loads profiles from URLs."
011 *
012 * The Initial Developer of the Original Code is University Health Network. Copyright (C)
013 * 2003. All Rights Reserved.
014 *
015 * Contributor(s): ______________________________________.
016 *
017 * Alternatively, the contents of this file may be used under the terms of the
018 * GNU General Public License (the "GPL"), in which case the provisions of the GPL are
019 * applicable instead of those above. If you wish to allow use of your version of this
020 * file only under the terms of the GPL and not to allow others to use your version
021 * of this file under the MPL, indicate your decision by deleting the provisions above
022 * and replace them with the notice and other provisions required by the GPL License.
023 * If you do not delete the provisions above, a recipient may use your version of
024 * this file under either the MPL or the GPL.
025 *
026 */
027 package ca.uhn.hl7v2.conf.store;
028
029 import java.io.*;
030 import java.net.*;
031
032 /**
033 * A read-only profile store that loads profiles from URLs. The URL
034 * for a profile is determined by the method getURL(). An
035 * attempt is also made to write
036 * @author Bryan Tripp
037 */
038 public abstract class URLProfileStore implements ProfileStore {
039
040 /** Creates a new instance of URLProfileStore */
041 public URLProfileStore() {
042 }
043
044 /** Retrieves profile from persistent storage (by ID).
045 */
046 public String getProfile(String ID) throws IOException {
047 String profile = null;
048 try {
049 BufferedReader in = new BufferedReader(new InputStreamReader(getURL(ID).openStream()));
050 StringBuffer buf = new StringBuffer();
051 int c = -1;
052 while ( (c = in.read()) != -1) {
053 buf.append( (char) c );
054 }
055 in.close();
056 profile = buf.toString();
057 } catch (MalformedURLException e) {
058 throw new IOException("MalformedURLException: " + e.getMessage());
059 }
060 return profile;
061 }
062
063 /** Stores profile in persistent storage with given ID.
064 */
065 public void persistProfile(String ID, String profile) throws IOException {
066 throw new IOException("Can't persist profile -- this profile store is read-only");
067 }
068
069 /**
070 * Returns the URL from which to read a profile given the profile ID. For example
071 * given "123" it could return ftp://hospital_x.org/hl7/123.xml, or
072 * http://hl7_conformance_service.com?profile=123.
073 */
074 public abstract URL getURL(String ID) throws MalformedURLException;
075
076
077 /** Stores profile in persistent storage with given ID.
078 */
079 /*public void persistProfile(String ID, String profile) throws IOException {
080 try {
081 URL url = getWriteURL(ID);
082 if (url == null) {
083 throw new IOException("Can't persist profile -- this profile store is read-only");
084 } else {
085 URLConnection uc = url.openConnection();
086 uc.connect();
087 uc.getOutputStream().write(profile.getBytes());
088 uc.getOutputStream().flush();
089 uc.getOutputStream().close();
090 }
091 } catch (MalformedURLException e) {
092 throw new IOException("MalformedURLException: " + e.getMessage());
093 }
094 }*/
095
096 /**
097 * Returns the URL to which a profile should be written, given the
098 * profile ID. This defaults to getReadURL() but can be over-ridden.
099 * For read-only stores, over-ride this method to return null.
100 */
101 /*public URL getWriteURL(String ID) throws MalformedURLException {
102 return getReadURL(ID);
103 }*/
104
105 }