Java ReturnFields.getLuceneFieldNames方法代码示例

import org.apache.solr.search.ReturnFields; //导入方法依赖的package包/类
public final void writeDocuments(String name, ResultContext res, ReturnFields fields ) throws IOException {
  DocList ids = res.docs;
  TransformContext context = new TransformContext();
  context.query = res.query;
  context.wantsScores = fields.wantsScore() && ids.hasScores();
  context.req = req;
  writeStartDocumentList(name, ids.offset(), ids.size(), ids.matches(), 
      context.wantsScores ? new Float(ids.maxScore()) : null );
  
  DocTransformer transformer = fields.getTransformer();
  context.searcher = req.getSearcher();
  context.iterator = ids.iterator();
  if( transformer != null ) {
    transformer.setContext( context );
  }
  int sz = ids.size();
  Set<String> fnames = fields.getLuceneFieldNames();
  for (int i=0; i<sz; i++) {
    int id = context.iterator.nextDoc();
    Document doc = context.searcher.doc(id, fnames);
    SolrDocument sdoc = toSolrDocument( doc );
    if( transformer != null ) {
      transformer.transform( sdoc, id);
    }
    writeSolrDocument( null, sdoc, returnFields, i );
  }
  if( transformer != null ) {
    transformer.setContext( null );
  }
  writeEndDocumentList();
}
 

import org.apache.solr.search.ReturnFields; //导入方法依赖的package包/类
/**
 * Pre-fetch documents into the index searcher's document cache.
 *
 * This is an entirely optional step which you might want to perform for
 * the following reasons:
 *
 * <ul>
 *     <li>Locates the document-retrieval costs in one spot, which helps
 *     detailed performance measurement</li>
 *
 *     <li>Determines a priori what fields will be needed to be fetched by
 *     various subtasks, like response writing and highlighting.  This
 *     minimizes the chance that many needed fields will be loaded lazily.
 *     (it is more efficient to load all the field we require normally).</li>
 * </ul>
 *
 * If lazy field loading is disabled, this method does nothing.
 */
public static void optimizePreFetchDocs(ResponseBuilder rb,
                                        DocList docs,
                                        Query query,
                                        SolrQueryRequest req,
                                        SolrQueryResponse res) throws IOException {
  SolrIndexSearcher searcher = req.getSearcher();
  if(!searcher.enableLazyFieldLoading) {
    // nothing to do
    return;
  }

  ReturnFields returnFields = res.getReturnFields();
  if(returnFields.getLuceneFieldNames() != null) {
    Set<String> fieldFilter = returnFields.getLuceneFieldNames();

    if (rb.doHighlights) {
      // copy return fields list
      fieldFilter = new HashSet<>(fieldFilter);
      // add highlight fields

      SolrHighlighter highlighter = HighlightComponent.getHighlighter(req.getCore());
      for (String field: highlighter.getHighlightFields(query, req, null))
        fieldFilter.add(field);

      // fetch unique key if one exists.
      SchemaField keyField = searcher.getSchema().getUniqueKeyField();
      if(null != keyField)
        fieldFilter.add(keyField.getName());
    }

    // get documents
    DocIterator iter = docs.iterator();
    for (int i=0; i<docs.size(); i++) {
      searcher.doc(iter.nextDoc(), fieldFilter);
    }

  }

}
 

import org.apache.solr.search.ReturnFields; //导入方法依赖的package包/类
/**
 * Pre-fetch documents into the index searcher's document cache.
 *
 * This is an entirely optional step which you might want to perform for
 * the following reasons:
 *
 * <ul>
 *     <li>Locates the document-retrieval costs in one spot, which helps
 *     detailed performance measurement</li>
 *
 *     <li>Determines a priori what fields will be needed to be fetched by
 *     various subtasks, like response writing and highlighting.  This
 *     minimizes the chance that many needed fields will be loaded lazily.
 *     (it is more efficient to load all the field we require normally).</li>
 * </ul>
 *
 * If lazy field loading is disabled, this method does nothing.
 */
public static void optimizePreFetchDocs(ResponseBuilder rb,
                                        DocList docs,
                                        Query query,
                                        SolrQueryRequest req,
                                        SolrQueryResponse res) throws IOException {
  SolrIndexSearcher searcher = req.getSearcher();
  if(!searcher.enableLazyFieldLoading) {
    // nothing to do
    return;
  }

  ReturnFields returnFields = res.getReturnFields();
  if(returnFields.getLuceneFieldNames() != null) {
    Set<String> fieldFilter = returnFields.getLuceneFieldNames();

    if (rb.doHighlights) {
      // copy return fields list
      fieldFilter = new HashSet<String>(fieldFilter);
      // add highlight fields

      SolrHighlighter highlighter = HighlightComponent.getHighlighter(req.getCore());
      for (String field: highlighter.getHighlightFields(query, req, null))
        fieldFilter.add(field);

      // fetch unique key if one exists.
      SchemaField keyField = searcher.getSchema().getUniqueKeyField();
      if(null != keyField)
        fieldFilter.add(keyField.getName());
    }

    // get documents
    DocIterator iter = docs.iterator();
    for (int i=0; i<docs.size(); i++) {
      searcher.doc(iter.nextDoc(), fieldFilter);
    }

  }

}