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 com.alibaba.wasp.plan.parser;
  
  import java.io.IOException;
  
  /**
   * Parser is for parsing sql.
   * 
   */
  public abstract class Parser {
  
    public enum SQLType {
      DQL, DML, DDL
    }
  
    /**
     * Parse sql to Statement,and set it into ParseContext.
     * 
     * @param context
     *          ParseContext
     * @throws java.io.IOException
     */
    protected abstract void parseSqlToStatement(ParseContext context)
        throws IOException;
  
    /**
     * Generate plan(insert plan,update plan,delete plan,query plan) in the parse
     * context
     *
     * @param context
     * @throws java.io.IOException
     */
    public abstract void generatePlan(ParseContext context) throws IOException;
  
    public abstract SQLType getSQLType(ParseContext context) throws IOException;
  }
  