content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * 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.
   */
  package com.alibaba.druid.sql.ast.statement;
  
  import com.alibaba.druid.DbType;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLReplaceable;
  import com.alibaba.druid.sql.ast.SQLStatementImpl;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class SQLDropUserStatement extends SQLStatementImpl implements SQLDropStatement, SQLReplaceable {
      private List<SQLExpr> users = new ArrayList<SQLExpr>(2);
  
      protected boolean ifExists;
  
      protected boolean cascade;
  
      public SQLDropUserStatement() {
      }
  
      public SQLDropUserStatement(DbType dbType) {
          super(dbType);
      }
  
      public boolean isIfExists() {
          return ifExists;
      }
  
      public void setIfExists(boolean ifExists) {
          this.ifExists = ifExists;
      }
  
      public boolean isCascade() {
          return cascade;
      }
  
      public void setCascade(boolean cascade) {
          this.cascade = cascade;
      }
  
      public List<SQLExpr> getUsers() {
          return users;
      }
  
      public void addUser(SQLExpr user) {
          if (user != null) {
              user.setParent(this);
          }
          this.users.add(user);
      }
  
      protected void accept0(SQLASTVisitor visitor) {
          if (visitor.visit(this)) {
              acceptChild(visitor, users);
          }
          visitor.endVisit(this);
      }
  
      @Override
      public List getChildren() {
          return users;
      }
  
      public boolean replace(SQLExpr expr, SQLExpr target) {
          for (int i = 0; i < users.size(); i++) {
              if (users.get(i) == expr) {
                  target.setParent(this);
                  users.set(i, target);
                  return true;
              }
          }
  
          return false;
      }
  
      @Override
      public DDLObjectType getDDLObjectType() {
          return DDLObjectType.USER;
      }
  }
  