content: /*
   * Copyright 1999-2012 Alibaba Group.
   *  
   * Licensed 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.
   */
  /**
   * (created at 2011-5-19)
   */
  package com.alibaba.cobar.parser.recognizer.mysql.syntax;
  
  import static com.alibaba.cobar.parser.recognizer.mysql.MySQLToken.PUNC_COMMA;
  import static com.alibaba.cobar.parser.recognizer.mysql.MySQLToken.PUNC_LEFT_PAREN;
  import static com.alibaba.cobar.parser.recognizer.mysql.MySQLToken.PUNC_RIGHT_PAREN;
  
  import java.sql.SQLSyntaxErrorException;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  
  import com.alibaba.cobar.parser.ast.expression.Expression;
  import com.alibaba.cobar.parser.ast.expression.primary.RowExpression;
  import com.alibaba.cobar.parser.recognizer.mysql.lexer.MySQLLexer;
  
  /**
   * @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
   */
  public abstract class MySQLDMLInsertReplaceParser extends MySQLDMLParser {
      public MySQLDMLInsertReplaceParser(MySQLLexer lexer, MySQLExprParser exprParser) {
          super(lexer, exprParser);
      }
  
      protected List<RowExpression> rowList() throws SQLSyntaxErrorException {
          List<RowExpression> valuesList;
          List<Expression> tempRowValue = rowValue();
          if (lexer.token() == PUNC_COMMA) {
              valuesList = new LinkedList<RowExpression>();
              valuesList.add(new RowExpression(tempRowValue));
              for (; lexer.token() == PUNC_COMMA;) {
                  lexer.nextToken();
                  tempRowValue = rowValue();
                  valuesList.add(new RowExpression(tempRowValue));
              }
          } else {
              valuesList = new ArrayList<RowExpression>(1);
              valuesList.add(new RowExpression(tempRowValue));
          }
          return valuesList;
      }
  
      /**
       * first token is <code>(</code>
       */
      private List<Expression> rowValue() throws SQLSyntaxErrorException {
          match(PUNC_LEFT_PAREN);
          if (lexer.token() == PUNC_RIGHT_PAREN) {
              return Collections.emptyList();
          }
          List<Expression> row;
          Expression expr = exprParser.expression();
          if (lexer.token() == PUNC_COMMA) {
              row = new LinkedList<Expression>();
              row.add(expr);
              for (; lexer.token() == PUNC_COMMA;) {
                  lexer.nextToken();
                  expr = exprParser.expression();
                  row.add(expr);
              }
          } else {
              row = new ArrayList<Expression>(1);
              row.add(expr);
          }
          match(PUNC_RIGHT_PAREN);
          return row;
      }
  }
  