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.List;
  
  /**
   * Represents an expression in the Groovy programming language, which
   * is the language that Gremlin scripts are written and interpreted in.
   */
  public interface GroovyExpression {
      /**
       * Generates a Groovy script from the expression.
       *
       * @param context
       */
      void generateGroovy(GroovyGenerationContext context);
  
      /**
       * Gets all of the child expressions of this expression.
       * s
       * @return
       */
      List<GroovyExpression> getChildren();
  
      /**
       * Makes a copy of the expression, keeping everything the
       * same except its child expressions.  These are replaced
       * with the provided children.  The order of the children
       * is important.  It is expected that the children provided
       * here are updated versions of the children returned by
       * getChildren().  The order of the children must be the
       * same as the order in which the children were returned
       * by getChildren()
       *
       * @param newChildren
       * @return
       */
      GroovyExpression copy(List<GroovyExpression> newChildren);
  
      /**
       * Makes a shallow copy of the GroovyExpression.  This
       * is equivalent to copy(getChildren());
       *
       * @return
       */
      GroovyExpression copy();
  
      /**
       * Gets the type of traversal step represented by this
       * expression (or TraversalStepType.NONE if it is not part of a graph traversal).
       *
       * @return
       */
      TraversalStepType getType();
  }
  