Bring in Peter's changes...finally :(

Author: scrappy

src/interfaces/jdbc/postgresql/Connection.java

@@ -28,7 +28,7 @@
  */
 public class Connection implements java.sql.Connection 
 {
-  private PG_Stream pg_stream;
+  protected PG_Stream pg_stream;
 
   private String PG_HOST;
   private int PG_PORT;
@@ -591,256 +591,18 @@ public String getUserName() throws SQLException
   {
     return PG_USER;
   }
-}
-
-// ***********************************************************************
-
-//  This class handles all the Streamed I/O for a postgresql connection
-class PG_Stream
-{
-  private Socket connection;
-  private InputStream pg_input;
-  private OutputStream pg_output;
-  
-  /**
-   * Constructor:  Connect to the PostgreSQL back end and return
-   * a stream connection.
-   *
-   * @param host the hostname to connect to
-   * @param port the port number that the postmaster is sitting on
-   * @exception IOException if an IOException occurs below it.
-   */
-  public PG_Stream(String host, int port) throws IOException
-  {
-    connection = new Socket(host, port);
-    pg_input = connection.getInputStream();
-    pg_output = connection.getOutputStream();	
-  }
-  
-  /**
-   * Sends a single character to the back end
-   *
-   * @param val the character to be sent
-   * @exception IOException if an I/O error occurs
-   */
-  public void SendChar(int val) throws IOException
-  {
-    pg_output.write(val);
-  }
-  
-  /**
-   * Sends an integer to the back end
-   *
-   * @param val the integer to be sent
-   * @param siz the length of the integer in bytes (size of structure)
-   * @exception IOException if an I/O error occurs
-   */
-  public void SendInteger(int val, int siz) throws IOException
-  {
-    byte[] buf = new byte[siz];
-    
-    while (siz-- > 0)
-      {
-	buf[siz] = (byte)(val & 0xff);
-	val >>= 8;
-      }
-    Send(buf);
-  }
-  
-  /**
-   * Send an array of bytes to the backend
-   *
-   * @param buf The array of bytes to be sent
-   * @exception IOException if an I/O error occurs
-   */
-  public void Send(byte buf[]) throws IOException
-  {
-    pg_output.write(buf);
-  }
-  
-  /**
-   * Send an exact array of bytes to the backend - if the length
-   * has not been reached, send nulls until it has.
-   *
-   * @param buf the array of bytes to be sent
-   * @param siz the number of bytes to be sent
-   * @exception IOException if an I/O error occurs
-   */
-  public void Send(byte buf[], int siz) throws IOException
-  {
-    int i;
-    
-    pg_output.write(buf, 0, (buf.length < siz ? buf.length : siz));
-    if (buf.length < siz)
-      {
-	for (i = buf.length ; i < siz ; ++i)
-	  {
-	    pg_output.write(0);
-	  }
-      }
-  }
-  
-  /**
-   * Receives a single character from the backend
-   *
-   * @return the character received
-   * @exception SQLException if an I/O Error returns
-   */
-  public int ReceiveChar() throws SQLException
-  {
-    int c = 0;
-    
-    try
-      {
-	c = pg_input.read();
-	if (c < 0) throw new IOException("EOF");
-      } catch (IOException e) {
-	throw new SQLException("Error reading from backend: " + e.toString());
-      }
-      return c;
-  }
-  
-  /**
-   * Receives an integer from the backend
-   *
-   * @param siz length of the integer in bytes
-   * @return the integer received from the backend
-   * @exception SQLException if an I/O error occurs
-   */
-  public int ReceiveInteger(int siz) throws SQLException
-  {
-    int n = 0;
-    
-    try
-      {
-	for (int i = 0 ; i < siz ; i++)
-	  {
-	    int b = pg_input.read();
-	    
-	    if (b < 0)
-	      throw new IOException("EOF");
-	    n = n | (b >> (8 * i)) ;
-	  }
-      } catch (IOException e) {
-	throw new SQLException("Error reading from backend: " + e.toString());
-      }
-      return n;
-  }
-  
-  /**
-   * Receives a null-terminated string from the backend.  Maximum of
-   * maxsiz bytes - if we don't see a null, then we assume something
-   * has gone wrong.
-   *
-   * @param maxsiz maximum length of string
-   * @return string from back end
-   * @exception SQLException if an I/O error occurs
-   */
-  public String ReceiveString(int maxsiz) throws SQLException
-  {
-    byte[] rst = new byte[maxsiz];
-    int s = 0;
-    
-    try
-      {
-	while (s < maxsiz)
-	  {
-	    int c = pg_input.read();
-	    if (c < 0)
-	      throw new IOException("EOF");
-	    else if (c == 0)
-	      break;
-	    else
-	      rst[s++] = (byte)c;
-	  }
-	if (s >= maxsiz)
-	  throw new IOException("Too Much Data");
-      } catch (IOException e) {
-	throw new SQLException("Error reading from backend: " + e.toString());
-      }
-      String v = new String(rst, 0, s);
-      return v;
-  }
 
   /**
-   * Read a tuple from the back end.  A tuple is a two dimensional
-   * array of bytes
-   *
-   * @param nf the number of fields expected
-   * @param bin true if the tuple is a binary tuple
-   * @return null if the current response has no more tuples, otherwise
-   *	an array of strings
-   * @exception SQLException if a data I/O error occurs
-   */
-  public byte[][] ReceiveTuple(int nf, boolean bin) throws SQLException
-  {
-    int i, bim = (nf + 7)/8;
-    byte[] bitmask = Receive(bim);
-    byte[][] answer = new byte[nf][0];
-    
-    int whichbit = 0x80;
-    int whichbyte = 0;
-    
-    for (i = 0 ; i < nf ; ++i)
-      {
-	boolean isNull = ((bitmask[whichbyte] & whichbit) == 0);
-	whichbit >>= 1;
-	if (whichbit == 0)
-	  {
-	    ++whichbyte;
-	    whichbit = 0x80;
-	  }
-	if (isNull) 
-	  answer[i] = null;
-	else
-	  {
-	    int len = ReceiveInteger(4);
-	    if (!bin) 
-	      len -= 4;
-	    if (len < 0) 
-	      len = 0;
-	    answer[i] = Receive(len);
-	  }
-      }
-    return answer;
-  }
-  
-  /**
-   * Reads in a given number of bytes from the backend
-   *
-   * @param siz number of bytes to read
-   * @return array of bytes received
-   * @exception SQLException if a data I/O error occurs
-   */
-  private byte[] Receive(int siz) throws SQLException
-  {
-    byte[] answer = new byte[siz];
-    int s = 0;
-    
-    try 
-      {
-	while (s < siz)
-	  {
-	    int w = pg_input.read(answer, s, siz - s);
-	    if (w < 0)
-	      throw new IOException("EOF");
-	    s += w;
-	  }
-      } catch (IOException e) {
-	throw new SQLException("Error reading from backend: " + e.toString());
-      }
-      return answer;
-  }
-  
-  /**
-   * Closes the connection
+   * This method is not part of the Connection interface. Its is an extension
+   * that allows access to the PostgreSQL Large Object API
    *
-   * @exception IOException if a IO Error occurs
+   * @return PGlobj class that implements the API
    */
-  public void close() throws IOException
+  public PGlobj getLargeObjectAPI() throws SQLException
   {
-    pg_output.close();
-    pg_input.close();
-    connection.close();
+    return new PGlobj(this);
   }
 }
+
+// ***********************************************************************
+