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This project is a type 4 jdbc driver which implemented the standard jdbc interface. It supports connectivity to tigergraph server and varieties of query types.
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package com.tigergraph.jdbc.common;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLWarning;

public abstract class Statement implements java.sql.Statement {

  protected Connection connection;
  protected ResultSet currentResultSet;
  protected int fetchSize;
  protected int timeout = -1;

  /**
   * Default constructor.
   */
  protected Statement(Connection connection) {
    this.connection = connection;
    this.currentResultSet = null;
  }

  @Override public Connection getConnection() throws SQLException {
    return this.connection;
  }

  @Override public void setFetchSize(int rows) throws SQLException {
    this.fetchSize = rows;
    return;
  }

  @Override public ResultSet getResultSet() throws SQLException {
    ResultSet rs = this.currentResultSet;
    this.currentResultSet = null;
    return rs;
  }

  @Override public void close() throws SQLException {
    return; // Nothing to do
  }

  @Override public void setQueryTimeout(int seconds) throws SQLException {
    if (seconds < 0) {
      throw new SQLException("Timeout should be greater than or equal to 0.");
    }

    // The unit of timeout for TigerGraph is millisecond.
    timeout = seconds * 1000;
  }

  @Override public int getQueryTimeout() throws SQLException {
    return timeout / 1000;
  }

  /*
   * Abstract Methods.
   */
  @Override public abstract boolean execute(String sql) throws SQLException;

  @Override public abstract ResultSet executeQuery(String sql) throws SQLException;

  @Override public abstract int executeUpdate(String sql) throws SQLException;

  @Override public abstract int getResultSetHoldability() throws SQLException;

  @Override public abstract int getResultSetConcurrency() throws SQLException;

  @Override public abstract int getResultSetType() throws SQLException;

  /*
   * Methods not implemented yet.
   */
  @Override public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

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

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

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

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

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

  @Override public int getMaxFieldSize() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void setMaxFieldSize(int max) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void setEscapeProcessing(boolean enable) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void setCursorName(String name) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void setFetchDirection(int direction) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public int getFetchDirection() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public int getFetchSize() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public boolean getMoreResults(int current) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public ResultSet getGeneratedKeys() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void cancel() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void setPoolable(boolean poolable) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public boolean isPoolable() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void addBatch(String sql) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void clearBatch() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public int[] executeBatch() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

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

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

  @Override public  T unwrap(Class iface) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public boolean isWrapperFor(Class iface) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public int getMaxRows() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void setMaxRows(int max) throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public boolean getMoreResults() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public SQLWarning getWarnings() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public void clearWarnings() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public int getUpdateCount() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

  @Override public boolean isClosed() throws SQLException {
    throw new UnsupportedOperationException("Not implemented yet.");
  }

}