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.controller.internal;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Set;
  import java.util.TreeMap;
  
  import org.apache.ambari.server.controller.spi.Resource;
  import org.apache.ambari.server.controller.utilities.PropertyHelper;
  
  /**
   * Simple resource implementation.
   */
  public class ResourceImpl implements Resource {
  
    /**
     * The resource type.
     */
    private final Type type;
  
    /**
     * The map of property maps keyed by property category.
     */
    private final Map<String, Map<String, Object>> propertiesMap =
        Collections.synchronizedMap(new TreeMap<String, Map<String, Object>>());
  
    // ----- Constructors ------------------------------------------------------
  
    /**
     * Create a resource of the given type.
     *
     * @param type the resource type
     */
    public ResourceImpl(Type type) {
      this.type = type;
    }
  
    /**
     * Copy constructor
     *
     * @param resource the resource to copy
     */
    public ResourceImpl(Resource resource) {
      this(resource, null);
    }
  
    /**
     * Construct a resource from the given resource, setting only the properties
     * that are found in the given set of property and category ids.
     *
     * @param resource    the resource to copy
     * @param propertyIds the set of requested property and category ids
     */
    public ResourceImpl(Resource resource, Set<String> propertyIds) {
      this.type = resource.getType();
  
      for (Map.Entry<String, Map<String, Object>> categoryEntry :
          resource.getPropertiesMap().entrySet()) {
        String category = categoryEntry.getKey();
        Map<String, Object> propertyMap = categoryEntry.getValue();
        if (propertyMap != null) {
          for (Map.Entry<String, Object> propertyEntry : propertyMap.entrySet()) {
            String propertyId = PropertyHelper.getPropertyId(category, propertyEntry.getKey());
            if (propertyIds == null || propertyIds.isEmpty() || PropertyHelper.containsProperty(propertyIds, propertyId)) {
              Object propertyValue = propertyEntry.getValue();
              setProperty(propertyId, propertyValue);
            }
          }
        }
      }
    }
  
  
    // ----- Resource ----------------------------------------------------------
  
    @Override
    public Type getType() {
      return type;
    }
  
    @Override
    public Map<String, Map<String, Object>> getPropertiesMap() {
      return propertiesMap;
    }
  
    @Override
    public void setProperty(String id, Object value) {
      String categoryKey = getCategoryKey(PropertyHelper.getPropertyCategory(id));
  
      Map<String, Object> properties = propertiesMap.get(categoryKey);
      if (properties == null) {
        properties = Collections.synchronizedMap(new TreeMap<String, Object>());
        propertiesMap.put(categoryKey, properties);
      }
      properties.put(PropertyHelper.getPropertyName(id), value);
    }
  
    @Override
    public void addCategory(String id) {
      String categoryKey = getCategoryKey(id);
  
      if (!propertiesMap.containsKey(categoryKey)) {
        propertiesMap.put(categoryKey, new HashMap<>());
      }
    }
  
    @Override
    public Object getPropertyValue(String id) {
      String categoryKey = getCategoryKey(PropertyHelper.getPropertyCategory(id));
  
      Map<String, Object> properties = propertiesMap.get(categoryKey);
  
      return properties == null ?
          null : properties.get(PropertyHelper.getPropertyName(id));
    }
  
  
    // ----- Object overrides --------------------------------------------------
  
    @Override
    public String toString() {
      StringBuilder sb = new StringBuilder();
  
      sb.append("Resource : ").append(type).append("\n");
      sb.append("Properties:\n");
      sb.append(propertiesMap);
  
      return sb.toString();
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;
  
      ResourceImpl resource = (ResourceImpl) o;
  
      return type == resource.type &&
          !(propertiesMap != null ? !propertiesMap.equals(resource.propertiesMap) : resource.propertiesMap != null);
    }
  
    @Override
    public int hashCode() {
      return 31 * type.hashCode() + (propertiesMap != null ? propertiesMap.hashCode() : 0);
    }
  
    // ----- utility methods ---------------------------------------------------
  
    private String getCategoryKey(String category) {
      return category == null ? "" : category;
    }
  }
  