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Java MoreLikeThisQuery类代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了Java中org.apache.lucene.queries.mlt.MoreLikeThisQuery的典型用法代码示例。如果您正苦于以下问题:Java MoreLikeThisQuery类的具体用法?Java MoreLikeThisQuery怎么用?Java MoreLikeThisQuery使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。



MoreLikeThisQuery类属于org.apache.lucene.queries.mlt包,在下文中一共展示了MoreLikeThisQuery类的3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,您的评价将有助于我们的系统推荐出更棒的Java代码示例。

示例1: getQuery

import org.apache.lucene.queries.mlt.MoreLikeThisQuery; //导入依赖的package包/类
@Override
public Query getQuery(Element e) throws ParserException {
  String fieldsList = e.getAttribute("fieldNames"); //a comma-delimited list of fields
  String fields[] = defaultFieldNames;
  if ((fieldsList != null) && (fieldsList.trim().length() > 0)) {
    fields = fieldsList.trim().split(",");
    //trim the fieldnames
    for (int i = 0; i < fields.length; i++) {
      fields[i] = fields[i].trim();
    }
  }

  //Parse any "stopWords" attribute
  //TODO MoreLikeThis needs to ideally have per-field stopWords lists - until then
  //I use all analyzers/fields to generate multi-field compatible stop list
  String stopWords = e.getAttribute("stopWords");
  Set<String> stopWordsSet = null;
  if ((stopWords != null) && (fields != null)) {
    stopWordsSet = new HashSet<>();
    for (String field : fields) {
      TokenStream ts = null;
      try {
        ts = analyzer.tokenStream(field, stopWords);
        CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
        ts.reset();
        while (ts.incrementToken()) {
          stopWordsSet.add(termAtt.toString());
        }
        ts.end();
      } catch (IOException ioe) {
        throw new ParserException("IoException parsing stop words list in "
            + getClass().getName() + ":" + ioe.getLocalizedMessage());
      } finally {
        IOUtils.closeWhileHandlingException(ts);
      }
    }
  }


  MoreLikeThisQuery mlt = new MoreLikeThisQuery(DOMUtils.getText(e), fields, analyzer, fields[0]);
  mlt.setMaxQueryTerms(DOMUtils.getAttribute(e, "maxQueryTerms", DEFAULT_MAX_QUERY_TERMS));
  mlt.setMinTermFrequency(DOMUtils.getAttribute(e, "minTermFrequency", DEFAULT_MIN_TERM_FREQUENCY));
  mlt.setPercentTermsToMatch(DOMUtils.getAttribute(e, "percentTermsToMatch", DEFAULT_PERCENT_TERMS_TO_MATCH) / 100);
  mlt.setStopWords(stopWordsSet);
  int minDocFreq = DOMUtils.getAttribute(e, "minDocFreq", -1);
  if (minDocFreq >= 0) {
    mlt.setMinDocFreq(minDocFreq);
  }

  mlt.setBoost(DOMUtils.getAttribute(e, "boost", 1.0f));

  return mlt;
}
 
开发者ID:lamsfoundation,项目名称:lams,代码行数:54,代码来源:LikeThisQueryBuilder.java


示例2: getQuery

import org.apache.lucene.queries.mlt.MoreLikeThisQuery; //导入依赖的package包/类
@Override
public Query getQuery(Element e) throws ParserException {
  String fieldsList = e.getAttribute("fieldNames"); //a comma-delimited list of fields
  String fields[] = defaultFieldNames;
  if ((fieldsList != null) && (fieldsList.trim().length() > 0)) {
    fields = fieldsList.trim().split(",");
    //trim the fieldnames
    for (int i = 0; i < fields.length; i++) {
      fields[i] = fields[i].trim();
    }
  }

  //Parse any "stopWords" attribute
  //TODO MoreLikeThis needs to ideally have per-field stopWords lists - until then
  //I use all analyzers/fields to generate multi-field compatible stop list
  String stopWords = e.getAttribute("stopWords");
  Set<String> stopWordsSet = null;
  if ((stopWords != null) && (fields != null)) {
    stopWordsSet = new HashSet<String>();
    for (String field : fields) {
      try {
        TokenStream ts = analyzer.tokenStream(field, new StringReader(stopWords));
        CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
        ts.reset();
        while (ts.incrementToken()) {
          stopWordsSet.add(termAtt.toString());
        }
        ts.end();
        ts.close();
      } catch (IOException ioe) {
        throw new ParserException("IoException parsing stop words list in "
            + getClass().getName() + ":" + ioe.getLocalizedMessage());
      }
    }
  }


  MoreLikeThisQuery mlt = new MoreLikeThisQuery(DOMUtils.getText(e), fields, analyzer, fields[0]);
  mlt.setMaxQueryTerms(DOMUtils.getAttribute(e, "maxQueryTerms", DEFAULT_MAX_QUERY_TERMS));
  mlt.setMinTermFrequency(DOMUtils.getAttribute(e, "minTermFrequency", DEFAULT_MIN_TERM_FREQUENCY));
  mlt.setPercentTermsToMatch(DOMUtils.getAttribute(e, "percentTermsToMatch", DEFAULT_PERCENT_TERMS_TO_MATCH) / 100);
  mlt.setStopWords(stopWordsSet);
  int minDocFreq = DOMUtils.getAttribute(e, "minDocFreq", -1);
  if (minDocFreq >= 0) {
    mlt.setMinDocFreq(minDocFreq);
  }

  mlt.setBoost(DOMUtils.getAttribute(e, "boost", 1.0f));

  return mlt;
}
 
开发者ID:pkarmstr,项目名称:NYBC,代码行数:52,代码来源:LikeThisQueryBuilder.java


示例3: getQuery

import org.apache.lucene.queries.mlt.MoreLikeThisQuery; //导入依赖的package包/类
@Override
public Query getQuery(Element e) throws ParserException {
  String fieldsList = e.getAttribute("fieldNames"); //a comma-delimited list of fields
  String fields[] = defaultFieldNames;
  if ((fieldsList != null) && (fieldsList.trim().length() > 0)) {
    fields = fieldsList.trim().split(",");
    //trim the fieldnames
    for (int i = 0; i < fields.length; i++) {
      fields[i] = fields[i].trim();
    }
  }

  //Parse any "stopWords" attribute
  //TODO MoreLikeThis needs to ideally have per-field stopWords lists - until then
  //I use all analyzers/fields to generate multi-field compatible stop list
  String stopWords = e.getAttribute("stopWords");
  Set<String> stopWordsSet = null;
  if ((stopWords != null) && (fields != null)) {
    stopWordsSet = new HashSet<String>();
    for (String field : fields) {
      TokenStream ts = null;
      try {
        ts = analyzer.tokenStream(field, stopWords);
        CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
        ts.reset();
        while (ts.incrementToken()) {
          stopWordsSet.add(termAtt.toString());
        }
        ts.end();
      } catch (IOException ioe) {
        throw new ParserException("IoException parsing stop words list in "
            + getClass().getName() + ":" + ioe.getLocalizedMessage());
      } finally {
        IOUtils.closeWhileHandlingException(ts);
      }
    }
  }


  MoreLikeThisQuery mlt = new MoreLikeThisQuery(DOMUtils.getText(e), fields, analyzer, fields[0]);
  mlt.setMaxQueryTerms(DOMUtils.getAttribute(e, "maxQueryTerms", DEFAULT_MAX_QUERY_TERMS));
  mlt.setMinTermFrequency(DOMUtils.getAttribute(e, "minTermFrequency", DEFAULT_MIN_TERM_FREQUENCY));
  mlt.setPercentTermsToMatch(DOMUtils.getAttribute(e, "percentTermsToMatch", DEFAULT_PERCENT_TERMS_TO_MATCH) / 100);
  mlt.setStopWords(stopWordsSet);
  int minDocFreq = DOMUtils.getAttribute(e, "minDocFreq", -1);
  if (minDocFreq >= 0) {
    mlt.setMinDocFreq(minDocFreq);
  }

  mlt.setBoost(DOMUtils.getAttribute(e, "boost", 1.0f));

  return mlt;
}
 
开发者ID:yintaoxue,项目名称:read-open-source-code,代码行数:54,代码来源:LikeThisQueryBuilder.java



注:本文中的org.apache.lucene.queries.mlt.MoreLikeThisQuery类示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。


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