content: /*
   * Copyright (c) 2018, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj;
  
  import java.util.List;
  import java.util.function.Function;
  import java.util.stream.Collectors;
  
  import com.mysql.cj.result.LongValueFactory;
  import com.mysql.cj.xdevapi.ExprUnparser;
  
  public class DataStoreMetadataImpl implements DataStoreMetadata {
  
      private Session session;
  
      public DataStoreMetadataImpl(Session sess) {
          this.session = sess;
      }
  
      public boolean schemaExists(String schemaName) {
          StringBuilder stmt = new StringBuilder("select count(*) from information_schema.schemata where schema_name = '");
          // TODO: verify quoting rules
          stmt.append(schemaName.replaceAll("'", "\\'"));
          stmt.append("'");
  
          Function<com.mysql.cj.result.Row, Long> rowToLong = r -> r.getValue(0, new LongValueFactory(this.session.getPropertySet()));
          List<Long> counters = this.session.query(this.session.getMessageBuilder().buildSqlStatement(stmt.toString()), null, rowToLong, Collectors.toList());
          return 1 == counters.get(0);
      }
  
      public boolean tableExists(String schemaName, String tableName) {
          StringBuilder stmt = new StringBuilder("select count(*) from information_schema.tables where table_schema = '");
          // TODO: verify quoting rules
          stmt.append(schemaName.replaceAll("'", "\\'"));
          stmt.append("' and table_name = '");
          stmt.append(tableName.replaceAll("'", "\\'"));
          stmt.append("'");
  
          Function<com.mysql.cj.result.Row, Long> rowToLong = r -> r.getValue(0, new LongValueFactory(this.session.getPropertySet()));
          List<Long> counters = this.session.query(this.session.getMessageBuilder().buildSqlStatement(stmt.toString()), null, rowToLong, Collectors.toList());
          return 1 == counters.get(0);
      }
  
      @Override
      public long getTableRowCount(String schemaName, String tableName) {
          StringBuilder stmt = new StringBuilder("select count(*) from ");
          stmt.append(ExprUnparser.quoteIdentifier(schemaName));
          stmt.append(".");
          stmt.append(ExprUnparser.quoteIdentifier(tableName));
  
          Function<com.mysql.cj.result.Row, Long> rowToLong = r -> r.getValue(0, new LongValueFactory(this.session.getPropertySet()));
          List<Long> counters = this.session.query(this.session.getMessageBuilder().buildSqlStatement(stmt.toString()), null, rowToLong, Collectors.toList());
          return counters.get(0);
      }
  
  }
  