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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.groovy;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Context used when generating Groovy queries.  Keeps track of query parameters
   * that are created during the process as well as the portion of the query that
   * has been generated so far.
   *
   */
  public class GroovyGenerationContext {
      private       boolean             parametersAllowed = true;
      private final Map<String, Object> parameterValues = new HashMap<>();
      private       int                 parameterCount;
  
      //used to build up the groovy script
      private final StringBuilder generatedQuery = new StringBuilder();
  
      public void setParametersAllowed(boolean value) {
          this.parametersAllowed = value;
      }
  
      public GroovyExpression addParameter(Object value) {
          if (this.parametersAllowed) {
              String parameterName = "p" + (++parameterCount);
  
              this.parameterValues.put(parameterName, value);
  
              return new IdentifierExpression(parameterName);
          } else {
              LiteralExpression expr = new LiteralExpression(value);
  
              expr.setTranslateToParameter(false);
  
              return expr;
          }
      }
  
      public StringBuilder append(String gremlin) {
          this.generatedQuery.append(gremlin);
  
          return generatedQuery;
      }
  
      public String getQuery() {
          return generatedQuery.toString();
      }
  
      public Map<String, Object> getParameters() {
          return Collections.unmodifiableMap(parameterValues);
      }
  }
  