Java 类org.apache.lucene.search.join.ToChildBlockJoinQuery 实例源码

@Override
public void transform(SolrDocument doc, int docid) {

  FieldType idFt = idField.getType();
  Object parentIdField = doc.getFirstValue(idField.getName());

  String parentIdExt = parentIdField instanceof IndexableField
    ? idFt.toExternal((IndexableField)parentIdField)
    : parentIdField.toString();

  try {
    Query parentQuery = idFt.getFieldQuery(null, idField, parentIdExt);
    Query query = new ToChildBlockJoinQuery(parentQuery, parentsFilter, false);
    DocList children = context.searcher.getDocList(query, childFilterQuery, new Sort(), 0, limit);
    if(children.matches() > 0) {
      DocIterator i = children.iterator();
      while(i.hasNext()) {
        Integer childDocNum = i.next();
        Document childDoc = context.searcher.doc(childDocNum);
        SolrDocument solrChildDoc = ResponseWriterUtil.toSolrDocument(childDoc, schema);

        // TODO: future enhancement...
        // support an fl local param in the transformer, which is used to build
        // a private ReturnFields instance that we use to prune unwanted field 
        // names from solrChildDoc
        doc.addChildDocument(solrChildDoc);
      }
    }

  } catch (IOException e) {
    doc.put(name, "Could not fetch child Documents");
  }
}

@Override
public void transform(SolrDocument doc, int docid) {

  FieldType idFt = idField.getType();
  Object parentIdField = doc.getFirstValue(idField.getName());

  String parentIdExt = parentIdField instanceof IndexableField
    ? idFt.toExternal((IndexableField)parentIdField)
    : parentIdField.toString();

  try {
    Query parentQuery = idFt.getFieldQuery(null, idField, parentIdExt);
    Query query = new ToChildBlockJoinQuery(parentQuery, parentsFilter, false);
    DocList children = context.searcher.getDocList(query, childFilterQuery, new Sort(), 0, limit);
    if(children.matches() > 0) {
      DocIterator i = children.iterator();
      while(i.hasNext()) {
        Integer childDocNum = i.next();
        Document childDoc = context.searcher.doc(childDocNum);
        SolrDocument solrChildDoc = ResponseWriterUtil.toSolrDocument(childDoc, schema);

        // TODO: future enhancement...
        // support an fl local param in the transformer, which is used to build
        // a private ReturnFields instance that we use to prune unwanted field 
        // names from solrChildDoc
        doc.addChildDocument(solrChildDoc);
      }
    }

  } catch (IOException e) {
    doc.put(name, "Could not fetch child Documents");
  }
}

protected Query createQuery(Query parentListQuery, Query query) {
  return new ToChildBlockJoinQuery(query, getFilter(parentListQuery), false);
}

protected Query createQuery(Query parentListQuery, Query query) {
  return new ToChildBlockJoinQuery(query, getFilter(parentListQuery), false);
}

protected Query createQuery(Query parentListQuery, Query query) {
  return new ToChildBlockJoinQuery(query, getFilter(parentListQuery), false);
}