content: /*
   * Copyright 2021 4Paradigm
   *
   * 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._4paradigm.openmldb.jdbc;
  
  import com._4paradigm.openmldb.sdk.SqlExecutor;
  
  import java.sql.Array;
  import java.sql.Blob;
  import java.sql.CallableStatement;
  import java.sql.Clob;
  import java.sql.Connection;
  import java.sql.NClob;
  import java.sql.SQLClientInfoException;
  import java.sql.SQLException;
  import java.sql.SQLWarning;
  import java.sql.SQLXML;
  import java.sql.Savepoint;
  import java.sql.Struct;
  import java.util.Map;
  import java.util.Properties;
  import java.util.concurrent.Executor;
  
  public class SQLConnection implements Connection {
      // TODO(hw): DatabaseMetaData use this directly until we can get INFORMATION_SCHEMA from sql
      private SqlExecutor client;
      private final Properties props;
      private final String defaultDatabase;
  
      private boolean isClosed = false;
  
      public SQLConnection(SqlExecutor client, Properties props) throws SQLException {
          this.client = client;
          this.props = props;
          this.defaultDatabase = props.getProperty("dbName", "");
          java.sql.Statement stmt = client.getStatement();
          // TODO(hw): offline job result is not good now, use online by default
          //  it only effects Statement
          stmt.execute("set @@execute_mode='online'");
          if (!this.defaultDatabase.isEmpty()) {
              stmt.execute("USE " + this.defaultDatabase);
          }
      }
  
      public SqlExecutor getClient() {
          return client;
      }
  
      public String getDefaultDatabase() {
          return defaultDatabase;
      }
  
      @Override
      public java.sql.Statement createStatement() throws SQLException {
          return client.getStatement();
      }
  
  
      /**
       * WARNING: insert prepared statement only can insert into <B>online storage</B><P>
       * database will use the db config set by jdbcUrl
       * <p>
       * select can visit both offline and online
       *
       * @param sql only supports insert and select
       * @return PreparedStatement
       * @throws SQLException if sql is unsupported
       */
      @Override
      public java.sql.PreparedStatement prepareStatement(String sql) throws SQLException {
          String lower = sql.toLowerCase();
          // insert, insert or xxx
          if (lower.startsWith("insert ")) {
              return client.getInsertPreparedStmt(this.defaultDatabase, sql);
          } else if (lower.startsWith("select")) {
              return client.getPreparedStatement(this.defaultDatabase, sql);
          } else if (lower.startsWith("delete")) {
              return client.getDeletePreparedStmt(this.defaultDatabase, sql);
          }
          throw new SQLException("unsupported sql");
      }
  
      @Override
      public CallableStatement prepareCall(String sql) throws SQLException {
          return null;
      }
  
      @Override
      public String nativeSQL(String sql) throws SQLException {
          return null;
      }
  
      @Override
      public void setAutoCommit(boolean autoCommit) throws SQLException {
  
      }
  
      @Override
      public boolean getAutoCommit() throws SQLException {
          return false;
      }
  
      @Override
      public void commit() throws SQLException {
          // do not throw an exception
      }
  
      @Override
      public void rollback() throws SQLException {
          throw new SQLException("unsupported");
      }
  
      @Override
      public void close() throws SQLException {
          if (isClosed) {
              return;
          }
          client.close();
          client = null;
          isClosed = true;
      }
  
      @Override
      public boolean isClosed() throws SQLException {
          return isClosed;
      }
  
      @Override
      public DatabaseMetaData getMetaData() throws SQLException {
          return new DatabaseMetaData(this);
      }
  
      @Override
      public void setReadOnly(boolean readOnly) throws SQLException {
  
      }
  
      @Override
      public boolean isReadOnly() throws SQLException {
          return false;
      }
  
      @Override
      public void setCatalog(String catalog) throws SQLException {
  
      }
  
      @Override
      public String getCatalog() throws SQLException {
          return null;
      }
  
      @Override
      public void setTransactionIsolation(int level) throws SQLException {
          throw new SQLException("isolation is unsupported");
      }
  
      @Override
      public int getTransactionIsolation() throws SQLException {
          return 0;
      }
  
      @Override
      public SQLWarning getWarnings() throws SQLException {
          return null;
      }
  
      @Override
      public void clearWarnings() throws SQLException {
  
      }
  
      @Override
      public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
          return null;
      }
  
      @Override
      public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
          return null;
      }
  
      @Override
      public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
          return null;
      }
  
      @Override
      public Map<String, Class<?>> getTypeMap() throws SQLException {
          return null;
      }
  
      @Override
      public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
  
      }
  
      @Override
      public void setHoldability(int holdability) throws SQLException {
  
      }
  
      @Override
      public int getHoldability() throws SQLException {
          return 0;
      }
  
      @Override
      public Savepoint setSavepoint() throws SQLException {
          return null;
      }
  
      @Override
      public Savepoint setSavepoint(String name) throws SQLException {
          return null;
      }
  
      @Override
      public void rollback(Savepoint savepoint) throws SQLException {
  
      }
  
      @Override
      public void releaseSavepoint(Savepoint savepoint) throws SQLException {
  
      }
  
      @Override
      public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
          return null;
      }
  
      @Override
      public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
          return null;
      }
  
      @Override
      public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
          return null;
      }
  
      @Override
      public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
          return null;
      }
  
      @Override
      public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
          return null;
      }
  
      @Override
      public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
          return null;
      }
  
      @Override
      public Clob createClob() throws SQLException {
          return null;
      }
  
      @Override
      public Blob createBlob() throws SQLException {
          return null;
      }
  
      @Override
      public NClob createNClob() throws SQLException {
          return null;
      }
  
      @Override
      public SQLXML createSQLXML() throws SQLException {
          return null;
      }
  
      @Override
      public boolean isValid(int timeout) throws SQLException {
          return false;
      }
  
      @Override
      public void setClientInfo(String name, String value) throws SQLClientInfoException {
  
      }
  
      @Override
      public void setClientInfo(Properties properties) throws SQLClientInfoException {
  
      }
  
      @Override
      public String getClientInfo(String name) throws SQLException {
          return null;
      }
  
      @Override
      public Properties getClientInfo() throws SQLException {
          return null;
      }
  
      @Override
      public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
          return null;
      }
  
      @Override
      public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
          return null;
      }
  
      @Override
      public void setSchema(String schema) throws SQLException {
  
      }
  
      @Override
      public String getSchema() throws SQLException {
          return null;
      }
  
      @Override
      public void abort(Executor executor) throws SQLException {
  
      }
  
      @Override
      public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
  
      }
  
      @Override
      public int getNetworkTimeout() throws SQLException {
          return 0;
      }
  
      @Override
      public <T> T unwrap(Class<T> iface) throws SQLException {
          return null;
      }
  
      @Override
      public boolean isWrapperFor(Class<?> iface) throws SQLException {
          return false;
      }
  }
  