001 /*
002 * Copyright 1999,2004 The Apache Software Foundation.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.apache.commons.feedparser.locate.blogservice;
018
019 import org.apache.commons.feedparser.FeedParserException;
020 import org.apache.commons.feedparser.locate.*;
021
022 import java.util.regex.*;
023
024 /**
025 * Models the PMachine blog service, encapsulating whether a given weblog
026 * is this type of service and where it usually keeps its feeds.
027 *
028 * @author Brad Neuberg, bkn3@columbia.edu
029 */
030 public class PMachine extends BlogService {
031
032 /** A pattern used to discover PMachine blogs. */
033 private static Pattern pmachinePattern =
034 Pattern.compile("pmachine", Pattern.CASE_INSENSITIVE);
035
036 /** Returns whether we can trust the results of this blog service's
037 * autodiscovery links. For example, TextAmerica returns invalid
038 * autodiscovery results.
039 */
040 public boolean hasValidAutoDiscovery() {
041 return true;
042 }
043
044 /** Returns whether we should follow HTTP redirects for this blog service.
045 * Some services don't implement HTTP redirects correctly, while others,
046 * like Xanga, require it.
047 */
048 public boolean followRedirects() {
049 return false;
050 }
051
052 /** Determines if the weblog at the given resource and with the given
053 * content is this blog service.
054 * @param resource A full URI to this resource, such as
055 * "http://www.codinginparadise.org".
056 * @param content The full HTML content at the resource's URL.
057 * @throws FeedParserException Thrown if an error occurs while
058 * determining the type of this weblog.
059 */
060 public boolean isThisService(String resource, String content)
061 throws FeedParserException {
062 boolean results = false;
063
064 Matcher pmachineMatcher = pmachinePattern.matcher(resource);
065
066 results = pmachineMatcher.find();
067
068 return results;
069 }
070
071 /**
072 * Returns an array of FeedReferences that contains information on the
073 * usual locations this blog service contains its feed. The feeds should
074 * be ordered by quality, so that higher quality feeds come before lower
075 * quality ones (i.e. you would want to have an Atom FeedReference
076 * object come before an RSS 0.91 FeedReference object in this list).
077 * @param resource A URL to the given weblog that might be used to build
078 * up where feeds are usually located.
079 * @param content The full content of the resource URL, which might
080 * be useful to determine where feeds are usually located. This can be
081 * null.
082 * @throws FeedParserException Thrown if an error occurs while trying
083 * to determine the usual locations of feeds for this service.
084 */
085 public FeedReference[] getFeedLocations(String resource,
086 String content)
087 throws FeedParserException {
088 FeedReference pmachineLocations[] =
089 { new FeedReference("index.xml", FeedReference.RSS_MEDIA_TYPE) };
090
091 return pmachineLocations;
092 }
093 }