content: /*
   * Licensed 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.ldap.service.ads.detectors;
  
  import java.util.Map;
  import java.util.Set;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Singleton;
  
  import org.apache.ambari.server.ldap.service.AttributeDetector;
  import org.apache.directory.api.ldap.model.entry.Entry;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.common.collect.Maps;
  
  /**
   * Attribute detector implementation that performs the attribute detection on a configured set of attribute detectors.
   * (it implements the composite design pattern)
   */
  @Singleton
  public class ChainedAttributeDetector implements AttributeDetector<Entry> {
  
    private static final Logger LOG = LoggerFactory.getLogger(ChainedAttributeDetector.class);
  
    /**
     * The set of detectors this instance delegates to
     */
    private final Set<AttributeDetector> detectors;
  
    @Inject
    public ChainedAttributeDetector(Set<AttributeDetector> detectors) {
      this.detectors = detectors;
    }
  
    @Override
    public void collect(Entry entry) {
      for (AttributeDetector detector : detectors) {
        LOG.info("Collecting information for the detector: [{}]", detector);
        detector.collect(entry);
      }
    }
  
    @Override
    public Map<String, String> detect() {
      Map<String, String> detectedAttributes = Maps.newHashMap();
      for (AttributeDetector detector : detectors) {
        LOG.info("Detecting ldap configuration value using the detector: [{}]", detector);
        detectedAttributes.putAll(detector.detect());
      }
      return detectedAttributes;
    }
  
    @Override
    public String toString() {
      return "ChainedAttributeDetector{" +
        "detectors=" + detectors +
        '}';
    }
  }
  