content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.ambari.server.state.quicklinksprofile;
  
  import java.io.IOException;
  
  import javax.annotation.Nullable;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * This factory returns the quicklinks visibility controller. If the received string is a parseable and valid quicklinks
   * profile, a {@link DefaultQuickLinkVisibilityController} will be returned based on the profile. If the string is
   * {@code null} or invalid {@link ShowAllLinksVisibilityController} will be returned that displays all links which
   * corresponds to the legacy behavior.
   */
  public class QuickLinkVisibilityControllerFactory {
    private static final Logger LOG = LoggerFactory.getLogger(QuickLinkVisibilityControllerFactory.class);
  
    /**
     * @param quickLinkProfileJson the quick links profile or {@code null} if no profile is set
     * @return a {@link DefaultQuickLinkVisibilityController} if the profile exists and is valid, {@link ShowAllLinksVisibilityController}
     *   otherwise.
     */
    public static QuickLinkVisibilityController get(@Nullable String quickLinkProfileJson) {
      if (null == quickLinkProfileJson) {
        LOG.info("No quick link profile is set, will display all quicklinks.");
        return new ShowAllLinksVisibilityController();
      }
      try {
        QuickLinksProfile profile = new QuickLinksProfileParser().parse(quickLinkProfileJson.getBytes());
        return new DefaultQuickLinkVisibilityController(profile);
      }
      catch (IOException | QuickLinksProfileEvaluationException ex) {
        LOG.error("Unable to parse quick link profile json: " + quickLinkProfileJson, ex);
        return new ShowAllLinksVisibilityController();
      }
    }
  
  }
  