TesterStatement.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.zeppelin.tajo;


import java.sql.*;

/**
 * This is borrowed from Apache Commons DBCP2.
 *
 * A dummy {@link java.sql.Statement}, for testing purposes.
 */
public class TesterStatement implements Statement {
  public TesterStatement(Connection conn) {
    _connection = conn;
  }

  public TesterStatement(Connection conn, int resultSetType, int resultSetConcurrency) {
    _connection = conn;
    _resultSetType = resultSetType;
    _resultSetConcurrency = resultSetConcurrency;
  }

  protected Connection _connection = null;
  protected boolean _open = true;
  protected int _rowsUpdated = 1;
  protected boolean _executeResponse = true;
  protected int _maxFieldSize = 1024;
  protected int _maxRows = 1024;
  protected boolean _escapeProcessing = false;
  protected int _queryTimeout = 1000;
  protected String _cursorName = null;
  protected int _fetchDirection = 1;
  protected int _fetchSize = 1;
  protected int _resultSetConcurrency = 1;
  protected int _resultSetType = 1;
  protected ResultSet _resultSet = null;

  @Override
  public ResultSet executeQuery(String sql) throws SQLException {
    checkOpen();
    if("null".equals(sql)) {
      return null;
    }
    if("invalid".equals(sql)) {
      throw new SQLException("invalid query");
    }
    if ("broken".equals(sql)) {
      throw new SQLException("broken connection");
    }
    if("select username".equals(sql)) {
      String username = ((TesterConnection) _connection).getUsername();
      Object[][] data = {{username}};
      return new TesterResultSet(this, data);
    } else {
      // Simulate timeout if queryTimout is set to less than 5 seconds
      if (_queryTimeout > 0 && _queryTimeout < 5) {
        throw new SQLException("query timeout");
      }
      return new TesterResultSet(this);
    }
  }

  @Override
  public int executeUpdate(String sql) throws SQLException {
    checkOpen();
    return _rowsUpdated;
  }

  @Override
  public void close() throws SQLException {
    // calling close twice has no effect
    if (!_open) {
      return;
    }

    _open = false;
    if (_resultSet != null) {
      _resultSet.close();
      _resultSet = null;
    }
  }

  @Override
  public int getMaxFieldSize() throws SQLException {
    checkOpen();
    return _maxFieldSize;
  }

  @Override
  public void setMaxFieldSize(int max) throws SQLException {
    checkOpen();
    _maxFieldSize = max;
  }

  @Override
  public int getMaxRows() throws SQLException {
    checkOpen();
    return _maxRows;
  }

  @Override
  public void setMaxRows(int max) throws SQLException {
    checkOpen();
    _maxRows = max;
  }

  @Override
  public void setEscapeProcessing(boolean enable) throws SQLException {
    checkOpen();
    _escapeProcessing = enable;
  }

  @Override
  public int getQueryTimeout() throws SQLException {
    checkOpen();
    return _queryTimeout;
  }

  @Override
  public void setQueryTimeout(int seconds) throws SQLException {
    checkOpen();
    _queryTimeout = seconds;
  }

  @Override
  public void cancel() throws SQLException {
    checkOpen();
  }

  @Override
  public SQLWarning getWarnings() throws SQLException {
    checkOpen();
    return null;
  }

  @Override
  public void clearWarnings() throws SQLException {
    checkOpen();
  }

  @Override
  public void setCursorName(String name) throws SQLException {
    checkOpen();
    _cursorName = name;
  }

  @Override
  public boolean execute(String sql) throws SQLException {
    checkOpen();
    if("invalid".equals(sql)) {
      throw new SQLException("invalid query");
    }
    return _executeResponse;
  }

  @Override
  public ResultSet getResultSet() throws SQLException {
    checkOpen();
    if (_resultSet == null) {
      _resultSet = new TesterResultSet(this);
    }
    return _resultSet;
  }

  @Override
  public int getUpdateCount() throws SQLException {
    checkOpen();
    return _rowsUpdated;
  }

  @Override
  public boolean getMoreResults() throws SQLException {
    checkOpen();
    return false;
  }

  @Override
  public void setFetchDirection(int direction) throws SQLException {
    checkOpen();
    _fetchDirection = direction;
  }

  @Override
  public int getFetchDirection() throws SQLException {
    checkOpen();
    return _fetchDirection;
  }

  @Override
  public void setFetchSize(int rows) throws SQLException {
    checkOpen();
    _fetchSize = rows;
  }

  @Override
  public int getFetchSize() throws SQLException {
    checkOpen();
    return _fetchSize;
  }

  @Override
  public int getResultSetConcurrency() throws SQLException {
    checkOpen();
    return _resultSetConcurrency;
  }

  @Override
  public int getResultSetType() throws SQLException {
    checkOpen();
    return _resultSetType;
  }

  @Override
  public void addBatch(String sql) throws SQLException {
    checkOpen();
  }

  @Override
  public void clearBatch() throws SQLException {
    checkOpen();
  }

  @Override
  public int[] executeBatch() throws SQLException {
    checkOpen();
    return new int[0];
  }

  @Override
  public Connection getConnection() throws SQLException {
    checkOpen();
    return _connection;
  }

  protected void checkOpen() throws SQLException {
    if(!_open) {
      throw new SQLException("Connection is closed.");
    }
  }

  @Override
  public boolean getMoreResults(int current) throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public ResultSet getGeneratedKeys() throws SQLException {
    return new TesterResultSet(this);
  }

  @Override
  public int executeUpdate(String sql, int autoGeneratedKeys)
    throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public int executeUpdate(String sql, int columnIndexes[])
    throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public int executeUpdate(String sql, String columnNames[])
    throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public boolean execute(String sql, int autoGeneratedKeys)
    throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public boolean execute(String sql, int columnIndexes[])
    throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public boolean execute(String sql, String columnNames[])
    throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public int getResultSetHoldability() throws SQLException {
    checkOpen();
    throw new SQLFeatureNotSupportedException("Not supported.");
  }


  @Override
  public boolean isWrapperFor(Class<?> iface) throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public <T> T unwrap(Class<T> iface) throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public boolean isClosed() throws SQLException {
    return !_open;
  }

  @Override
  public void setPoolable(boolean poolable) throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public boolean isPoolable() throws SQLException {
    throw new SQLFeatureNotSupportedException("Not supported.");
  }

  @Override
  public void closeOnCompletion() throws SQLException {
    throw new SQLFeatureNotSupportedException("Not implemented.");
  }

  @Override
  public boolean isCloseOnCompletion() throws SQLException {
    throw new SQLFeatureNotSupportedException("Not implemented.");
  }
}