import org.apache.solr.schema.CopyField; //导入依赖的package包/类
/**
 * Add the Field and value to the document with the specified boost, invoking the copyField mechanism
 * @param name The name of the field.
 * @param val The value to add
 * @param boost The boost
 *
 * @see #addField(String, String)
 * @see #addField(org.apache.solr.schema.SchemaField, String, float)
 * @see #addSingleField(org.apache.solr.schema.SchemaField, String, float)
 *
 */
public void addField(String name, String val, float boost) {
  SchemaField sfield = schema.getFieldOrNull(name);
  if (sfield != null) {
    addField(sfield,val,boost);
  }

  // Check if we should copy this field to any other fields.
  // This could happen whether it is explicit or not.
  final List<CopyField> copyFields = schema.getCopyFieldsList(name);
  if (copyFields != null) {
    for(CopyField cf : copyFields) {
      addSingleField(cf.getDestination(), cf.getLimitedValue( val ), boost);
    }
  }

  // error if this field name doesn't match anything
  if (sfield==null && (copyFields==null || copyFields.size()==0)) {
    throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,"ERROR:unknown field '" + name + "'");
  }
}
 

import org.apache.solr.schema.CopyField; //导入依赖的package包/类
private static List<String> toListOfStringDests(List<CopyField> raw) {
  List<String> result = new ArrayList<>(raw.size());
  for (CopyField f : raw) {
    result.add(f.getDestination().getName());
  }
  return result;
}
 

import org.apache.solr.schema.CopyField; //导入依赖的package包/类
private static List<String> toListOfStringDests(List<CopyField> raw)
{
    List<String> result = new ArrayList<>(raw.size());
    for (CopyField f : raw)
    {
        result.add(f.getDestination().getName());
    }
    return result;
}
 

import org.apache.solr.schema.CopyField; //导入依赖的package包/类
private static List<String> toListOfStringDests(List<CopyField> raw) {
  List<String> result = new ArrayList<String>(raw.size());
  for (CopyField f : raw) {
    result.add(f.getDestination().getName());
  }
  return result;
}
 

import org.apache.solr.schema.CopyField; //导入依赖的package包/类
@Override
public Boolean candidateExtraction(SolrCore core, String jatePropertyFile)
        throws IOException, JATEException {
    SolrIndexSearcher indexSearcher = core.getSearcher().get();
    IndexWriter writerIn = null;
    try {
    	writerIn = core.getSolrCoreState().getIndexWriter(core).get();
     Map<String,List<CopyField>> copyFields = core.getLatestSchema().getCopyFieldsMap();
	
     for (int i=0; i<indexSearcher.maxDoc(); i++) {
         Document doc = indexSearcher.doc(i);
	
         SolrUtil.copyFields(copyFields, DEFAULT_BOOST_VALUE, doc);
	
         writerIn.updateDocument(new Term("id",doc.get("id")), doc);
     }
     writerIn.commit();
	
     return true;
    } finally {
    	indexSearcher.close();
    	if (writerIn != null) {
    		writerIn.close();
    	}
    	
    }
}