本文整理汇总了Java中org.apache.lucene.queries.mlt.MoreLikeThis.setBoost方法的典型用法代码示例。如果您正苦于以下问题：Java MoreLikeThis.setBoost方法的具体用法？Java MoreLikeThis.setBoost怎么用？Java MoreLikeThis.setBoost使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.lucene.queries.mlt.MoreLikeThis的用法示例。
在下文中一共展示了MoreLikeThis.setBoost方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getSimilar
import org.apache.lucene.queries.mlt.MoreLikeThis; //导入方法依赖的package包/类
/**
* Searches for similar {@link News}.
* @return a {@link List} with the similar {@link News}. Can be empty.
* The more similar the more top is the {@link News} in the {@link List}.
*/
public List<News> getSimilar() {
final int docId = IndexSearch.getInstance().getDocIdForId(
NewsIndexType.getInstance(), String.valueOf(news.getId()));
// configure "more like this"
final MoreLikeThis moreLikeThis = IndexSearch.getInstance().newMoreLikeThis(news.getLocale());
moreLikeThis.setMinWordLen(3);
moreLikeThis.setBoost(true);
moreLikeThis.setBoostFactor(10);
moreLikeThis.setFieldNames(new String[] {
NewsIndexType.FIELD_TITLE,
NewsIndexType.FIELD_DESCRIPTION
});
try {
final BooleanQuery query = new BooleanQuery();
// it must have the same locale
QueryUtil.addLocale(query, news.getLocale());
// filter with publish date
final NumericRangeQuery<Long> dateQuery = NumericRangeQuery.newLongRange(
NewsIndexType.FIELD_PUBLISH_DATE, getDate(-PUBLISH_DATE_DELTA),
getDate(PUBLISH_DATE_DELTA), true, true);
query.add(dateQuery, Occur.MUST);
// it must be in the same category.
final NumericRangeQuery<Integer> categoryQuery = NumericRangeQuery.newIntRange(
NewsIndexType.FIELD_CATEGORYID, news.getCategoryId(), news.getCategoryId(), true, true);
query.add(categoryQuery, Occur.MUST);
final Query moreQuery = moreLikeThis.like(docId);
query.add(moreQuery, Occur.MUST);
// not the same news
query.add(new TermQuery(new Term(IIndexElement.FIELD_ID, String.valueOf(news.getId()))), Occur.MUST_NOT);
// execute query
final DocumentsSearchResult result = IndexSearch.getInstance().search(query, new SearchOptions());
final List<Document> resultDocs = new ArrayList<>();
for (final Document doc : result.getResults()) {
final float score = result.getScore(doc);
// use only news with a sufficient score.
if(score >= MIN_SCORE) {
resultDocs.add(doc);
LOGGER.debug("News {} is similar to news {}.", doc.get(IIndexElement.FIELD_ID), news.getId());
}
else {
LOGGER.debug("News {} has not a sufficient score to be similar to news {}.",
doc.get(IIndexElement.FIELD_ID), news.getId());
}
}
// convert the Documents to News.
return NewsIndexType.docsToNews(resultDocs);
}
catch (final IOException e) {
LOGGER.error("Can't build query for news with id '{}'.", news.getId());
}
return null;
}