/** * Partitions the <code>Authors</code> on the basis of <code>Topic</code>. The method returns a * <code>Collection</code> of <code>AuthorsTopicBuckets</code> each with a diferent <code>Topic * </code>. * * @return the collection of authors-topic buckets each with a different topic */ public static Collection partitionOnTopic(AuthorGroup authorGroup) { boolean topicFound; Iterator iterator1; Iterator iterator2; ExtendedHashSet extHashSet; Author author; AuthorsTopicBucket authorsTopicBucket; extHashSet = new ExtendedHashSet(); iterator1 = authorGroup.getIterator(); while (iterator1.hasNext()) { author = (DefaultAuthor) iterator1.next(); iterator2 = extHashSet.iterator(); topicFound = false; while ((iterator2.hasNext()) && (!topicFound)) { authorsTopicBucket = (DefaultAuthorsTopicBucket) iterator2.next(); if ((author.getTopic()).equals(authorsTopicBucket.getTopic())) { topicFound = true; authorsTopicBucket.addAuthor(author); } } if (!topicFound) { authorsTopicBucket = new DefaultAuthorsTopicBucket(); authorsTopicBucket.addAuthor(author); extHashSet.add(authorsTopicBucket); } } return extHashSet; }
/** * Filters out <code>Authors</code> that are deactivated. It returns a group of all the <code> * Authors</code> which are active. * * @param authorGroup Specifies the group of authors on which to apply the filter * @return the group of all the authors in the group that are active */ public static AuthorGroup getAllActiveAuthors(AuthorGroup authorGroup) { Iterator iterator; Author author; AuthorGroup result; result = new DefaultAuthorGroup(); iterator = authorGroup.getIterator(); while (iterator.hasNext()) { author = (DefaultAuthor) iterator.next(); if (author.isActive()) result.addAuthor(author); } return result; }
/** * Filters based on the <code>Topic</code> of <code>Author</code> on the conditions of equality * with the specified <code>Topic</code>. It returns a group of all the <code>Authors</code> which * have the specified <code>Topic</code>. * * @param authorGroup Specifies the group of authors on which to apply the filter * @param topic Specifies the topic of author to be equated against * @return the group of authors which belong to the specified topic */ public static AuthorGroup filterOnTopicEquality(AuthorGroup authorGroup, Topic topic) { Iterator iterator; Author author; AuthorGroup result; result = new DefaultAuthorGroup(); iterator = authorGroup.getIterator(); while (iterator.hasNext()) { author = (DefaultAuthor) iterator.next(); if (topic.equals(author.getTopic())) result.addAuthor(author); } return result; }