/**
* 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.query.render;
import java.util.Set;
import org.apache.ambari.server.api.query.QueryInfo;
import org.apache.ambari.server.api.services.Request;
import org.apache.ambari.server.api.services.Result;
import org.apache.ambari.server.api.services.ResultPostProcessor;
import org.apache.ambari.server.api.services.ResultPostProcessorImpl;
import org.apache.ambari.server.api.util.TreeNode;
import org.apache.ambari.server.api.util.TreeNodeImpl;
/**
* Default resource renderer.
* Provides the default "native" rendering for all resources.
*/
public class DefaultRenderer extends BaseRenderer implements Renderer {
// ----- Renderer ----------------------------------------------------------
@Override
public TreeNode<Set<String>> finalizeProperties(
TreeNode<QueryInfo> queryTree, boolean isCollection) {
QueryInfo queryInfo = queryTree.getObject();
TreeNode<Set<String>> resultTree = new TreeNodeImpl<>(
null, queryInfo.getProperties(), queryTree.getName());
copyPropertiesToResult(queryTree, resultTree);
boolean addKeysToEmptyResource = true;
if (! isCollection && isRequestWithNoProperties(queryTree)) {
addSubResources(queryTree, resultTree);
addKeysToEmptyResource = false;
}
ensureRequiredProperties(resultTree, addKeysToEmptyResource);
return resultTree;
}
@Override
public ResultPostProcessor getResultPostProcessor(Request request) {
// simply return the native rendering
return new ResultPostProcessorImpl(request);
}
@Override
public Result finalizeResult(Result queryResult) {
return queryResult;
}
}