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DbConnectionAccess.java
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Created
Sun, Feb 2, 05:04

DbConnectionAccess.java
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package database.access;
import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.math.ec.ECPoint;
import database.Connector;
public class DbConnectionAccess implements Connector {
private final static Logger LOGGER = Logger.getLogger(DbConnectionAccess.class.getName());
private String dbFilename;
protected Connection connect;
protected PreparedStatement preparedStmt = null;
protected ResultSet resultSet = null;
public DbConnectionAccess(String dbFilename) {
this.dbFilename = dbFilename;
}
@Override
public void openConnection() {
try {
Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
} catch (ClassNotFoundException e) {
LOGGER.log(Level.SEVERE, null, e);
System.exit(-1);
}
File filename = new File(dbFilename);
try {
connect = DriverManager.getConnection("jdbc:ucanaccess://" + filename.getAbsolutePath());
} catch (SQLException e) {
LOGGER.log(Level.SEVERE, null, e);
}
}
@Override
public void closeConnection() {
try {
if (connect == null) {
LOGGER.log(Level.WARNING, "Connection to " + dbFilename + " already closed.");
}
if (resultSet != null) {
resultSet.close();
}
if (connect != null) {
connect.close();
}
} catch (Exception e) {
LOGGER.log(Level.SEVERE, null, e);
} finally {
connect = null;
// LOGGER.log(Level.INFO, "Disconnected from " + ipAddr + "/" + database);
}
}
@Override
public ECPoint getPublicKey(int ID_p, X9ECParameters ecParams)
throws SQLException {
preparedStmt = connect.prepareStatement("SELECT value FROM cryptokeys WHERE ID_p=? AND isPublic=1");
preparedStmt.setInt(1, ID_p);
resultSet = preparedStmt.executeQuery();
if(resultSet.next()) {
return ecParams.getCurve().decodePoint(resultSet.getBytes("value"));
}
else {
LOGGER.log(Level.SEVERE, "Could not find public key for patient " + ID_p);
return null;
}
}
}

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