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 2011-7-5)
   */
  package com.alibaba.cobar.parser.ast.stmt.ddl;
  
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  
  import com.alibaba.cobar.parser.ast.expression.primary.Identifier;
  import com.alibaba.cobar.parser.util.Pair;
  import com.alibaba.cobar.parser.visitor.SQLASTVisitor;
  
  /**
   * @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
   */
  public class DDLRenameTableStatement implements DDLStatement {
      private final List<Pair<Identifier, Identifier>> list;
  
      public DDLRenameTableStatement() {
          this.list = new LinkedList<Pair<Identifier, Identifier>>();
      }
  
      public DDLRenameTableStatement(List<Pair<Identifier, Identifier>> list) {
          if (list == null) {
              this.list = Collections.emptyList();
          } else {
              this.list = list;
          }
      }
  
      public DDLRenameTableStatement addRenamePair(Identifier from, Identifier to) {
          list.add(new Pair<Identifier, Identifier>(from, to));
          return this;
      }
  
      public List<Pair<Identifier, Identifier>> getList() {
          return list;
      }
  
      @Override
      public void accept(SQLASTVisitor visitor) {
          visitor.visit(this);
      }
  
  }
  