text: // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
  package com.yahoo.documentapi;
  
  import com.yahoo.document.Document;
  import com.yahoo.document.DocumentId;
  
  import java.util.LinkedList;
  import java.util.List;
  
  /**
   * A simple document queue that queues up all results and automatically acks
   * them.
   * <p>
   * Retrieving the list is not thread safe, so wait until visitor is done. This
   * is a simple class merely meant for testing.
   *
   * @author <a href="mailto:humbe@yahoo-inc.com">H&aring;kon Humberset</a>
   */
  public class SimpleVisitorDocumentQueue extends DumpVisitorDataHandler {
      private final List<Document> documents = new LinkedList<Document>();
  
      // Inherit doc from VisitorDataHandler
      public void reset() {
          super.reset();
          documents.clear();
      }
  
      @Override
      public void onDocument(Document doc, long timestamp) {
          documents.add(doc);
      }
  
      public void onRemove(DocumentId docId) {}
  
      /** @return a list of all documents retrieved so far */
      public List<Document> getDocuments() {
          return documents;
      }
  
  }
  