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.asterix.translator;
  
  import java.io.PrintWriter;
  
  public class ExecutionPlansHtmlPrintUtil {
  
      private static final String LOGICAL_PLAN_LBL = "Logical plan";
      private static final String EXPRESSION_TREE_LBL = "Expression tree";
      private static final String REWRITTEN_EXPRESSION_TREE_LBL = "Rewritten expression tree";
      private static final String OPTIMIZED_LOGICAL_PLAN_LBL = "Optimized logical plan";
      private static final String JOB_LBL = "Job";
  
      private ExecutionPlansHtmlPrintUtil() {
      }
  
      public static void print(PrintWriter output, ExecutionPlans plans) {
          printNonNull(output, EXPRESSION_TREE_LBL, plans.getExpressionTree());
          printNonNull(output, REWRITTEN_EXPRESSION_TREE_LBL, plans.getRewrittenExpressionTree());
          printNonNull(output, LOGICAL_PLAN_LBL, plans.getLogicalPlan());
          printNonNull(output, OPTIMIZED_LOGICAL_PLAN_LBL, plans.getOptimizedLogicalPlan());
          printNonNull(output, JOB_LBL, plans.getJob());
      }
  
      private static void printNonNull(PrintWriter output, String lbl, String value) {
          if (value != null) {
              printFieldPrefix(output, lbl);
              output.print(value);
              printFieldPostfix(output);
          }
      }
  
      private static void printFieldPrefix(PrintWriter output, String lbl) {
          output.println();
          output.println("<h4>" + lbl + ":</h4>");
          switch (lbl) {
              case LOGICAL_PLAN_LBL:
                  output.println("<pre class=query-plan>");
                  break;
              case OPTIMIZED_LOGICAL_PLAN_LBL:
                  output.println("<pre class=query-optimized-plan>");
                  break;
              default:
                  output.println("<pre>");
                  break;
          }
      }
  
      private static void printFieldPostfix(PrintWriter output) {
          output.println("</pre>");
      }
  }
  