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.api.resources;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.ambari.server.api.services.Request;
  import org.apache.ambari.server.api.util.TreeNode;
  import org.apache.ambari.server.controller.spi.Resource;
  import org.apache.ambari.server.controller.spi.Schema;
  import org.apache.ambari.server.controller.utilities.ClusterControllerHelper;
  import org.apache.ambari.server.controller.utilities.PropertyHelper;
  
  /**
   * Host_Component resource definition.
   */
  public class HostComponentResourceDefinition extends BaseResourceDefinition {
  
    /**
     * Constructor.
     */
    public HostComponentResourceDefinition() {
      super(Resource.Type.HostComponent);
    }
  
    @Override
    public String getPluralName() {
      return "host_components";
    }
  
    @Override
    public String getSingularName() {
      return "host_component";
    }
  
  
    @Override
    public Set<SubResourceDefinition> getSubResourceDefinitions() {
      Set<SubResourceDefinition> setSubResources = new HashSet<>();
  
      setSubResources.add(new SubResourceDefinition(Resource.Type.Component,
          Collections.singleton(Resource.Type.Service), false));
     
      setSubResources.add(new SubResourceDefinition(Resource.Type.HostComponentProcess));
      
      return setSubResources;
    }
  
    @Override
    public List<PostProcessor> getPostProcessors() {
      List<PostProcessor> listProcessors = new ArrayList<>();
      listProcessors.add(new HostComponentHrefProcessor());
      listProcessors.add(new HostComponentHostProcessor());
  
      return listProcessors;
    }
    /**
     * Host_Component resource processor which is responsible for generating href's for host components.
     * This is called by the ResultPostProcessor during post processing of a result.
     */
    private class HostComponentHrefProcessor extends BaseHrefPostProcessor {
      @Override
      public void process(Request request, TreeNode<Resource> resultNode, String href) {
        if (! href.contains("/hosts/")) {
          Resource r = resultNode.getObject();
          Schema schema = ClusterControllerHelper.getClusterController().getSchema(r.getType());
          Object host = r.getPropertyValue(schema.getKeyPropertyId(Resource.Type.Host));
          Object hostComponent = r.getPropertyValue(schema.getKeyPropertyId(r.getType()));
  
          int idx = href.indexOf("clusters/") + "clusters/".length();
          idx = href.indexOf("/", idx) + 1;
  
          href = href.substring(0, idx) +
              "hosts/" + host + "/host_components/" + hostComponent;
  
          resultNode.setProperty("href", href);
        } else {
          super.process(request, resultNode, href);
        }
      }
    }
  
    /**
     * Host_Component resource processor which is responsible for generating a host section for host components.
     * This is called by the ResultPostProcessor during post processing of a result.
     */
    private class HostComponentHostProcessor implements PostProcessor {
      @Override
      public void process(Request request, TreeNode<Resource> resultNode, String href) {
        //todo: look at partial request fields to ensure that hosts should be returned
        if (request.getResource().getResourceDefinition().getType() == getType()) {
          // only add host if query host_resource was directly queried
          String nodeHref = resultNode.getStringProperty("href");
          resultNode.getObject().setProperty(PropertyHelper.getPropertyId("host", "href"),
              nodeHref.substring(0, nodeHref.indexOf("/host_components/")));
        }
      }
    }
  }
  