Fix for java to allow password, european dates,from Peter T Mount

src/interfaces/jdbc/postgresql/Connection.java

@@ -36,11 +36,15 @@ public class Connection implements java.sql.Connection
   private String PG_PASSWORD;
   private String PG_DATABASE;
   private boolean PG_STATUS;
+  private boolean PG_AUTH;	// true, then password auth used
   
   public boolean CONNECTION_OK = true;
   public boolean CONNECTION_BAD = false;
   
-  private int STARTUP_CODE = 7;
+  private int STARTUP_CODE = STARTUP_USER;
+  private static final int STARTUP_USER = 7;	// User auth
+  private static final int STARTUP_PASS = 14;	// Password auth
+  private static final int STARTUP_LEN  = 288;	// Length of a startup packet
   
   private boolean autoCommit = true;
   private boolean readOnly = false;
@@ -49,6 +53,12 @@ public class Connection implements java.sql.Connection
   private String this_url;
   private String cursor = null;	// The positioned update cursor name
   
+  // This is false for US, true for European date formats
+  protected boolean europeanDates = false;
+  
+  // Now handle notices as warnings, so things like "show" now work
+  protected SQLWarning firstWarning = null;
+  
   /**
    * Connect to a PostgreSQL database back end.
    *
@@ -63,7 +73,7 @@ public class Connection implements java.sql.Connection
    */
   public Connection(String host, int port, Properties info, String database, String url, Driver d) throws SQLException
   {
-    int len = 288;			// Length of a startup packet
+    int len = STARTUP_LEN;	// Length of a startup packet
     
     this_driver = d;
     this_url = new String(url);
@@ -74,6 +84,13 @@ public class Connection implements java.sql.Connection
     PG_HOST = new String(host);
     PG_STATUS = CONNECTION_BAD;
     
+    if(info.getProperty("auth") != null) {
+      PG_AUTH=true;
+      STARTUP_CODE=STARTUP_PASS;
+    } else {
+      STARTUP_CODE=STARTUP_USER;
+    }
+    
     try
       {
 	pg_stream = new PG_Stream(host, port);
@@ -88,10 +105,34 @@ public class Connection implements java.sql.Connection
 	  pg_stream.SendInteger(STARTUP_CODE, 4);		len -= 4;
 	  pg_stream.Send(database.getBytes(), 64);	len -= 64;
 	  pg_stream.Send(PG_USER.getBytes(), len);
+	  
+	  // Send the password packet if required
+	  if(PG_AUTH) {
+	    len=STARTUP_LEN;
+	    pg_stream.SendInteger(len, 4);			len -= 4;
+	    pg_stream.SendInteger(STARTUP_PASS, 4);		len -= 4;
+	    pg_stream.Send(PG_USER.getBytes(), PG_USER.length());
+	    len-=PG_USER.length();
+	    pg_stream.SendInteger(0,1);			len -= 1;
+	    pg_stream.Send(PG_PASSWORD.getBytes(), len);
+	  }
+	  
 	} catch (IOException e) {
 	  throw new SQLException("Connection failed: " + e.toString());
 	}
-	ExecSQL(" ");				// Test connection
+	
+	// Find out the date style by issuing the SQL: show datestyle
+	// This actually issues a warning, and our own warning handling
+	// code handles this itself.
+	//
+	// Also, this query replaced the NULL query issued to test the
+	// connection.
+	//
+	clearWarnings();
+	ExecSQL("show datestyle");
+	
+	// Mark the connection as ok, and cleanup
+	clearWarnings();
 	PG_STATUS = CONNECTION_OK;
   }
   
@@ -391,7 +432,7 @@ public class Connection implements java.sql.Connection
    */
   public SQLWarning getWarnings() throws SQLException
   {
-    return null;	// We handle warnings as errors
+    return firstWarning;
   }
   
   /**
@@ -402,13 +443,36 @@ public class Connection implements java.sql.Connection
    */
   public void clearWarnings() throws SQLException
   {
-    // Not handles since we handle wanrings as errors
+    firstWarning = null;
   }
   
   // **********************************************************
   //		END OF PUBLIC INTERFACE
   // **********************************************************
   
+  /**
+   * This adds a warning to the warning chain
+   */
+  public void addWarning(String msg)
+  {
+    // Add the warning to the chain
+    if(firstWarning!=null)
+      firstWarning.setNextWarning(new SQLWarning(msg));
+    else
+      firstWarning = new SQLWarning(msg);
+    
+    // Now check for some specific messages
+    
+    // This is generated by the SQL "show datestyle"
+    if(msg.startsWith("NOTICE:DateStyle")) {
+      if(msg.indexOf("with US")==-1)
+	europeanDates=true;
+      else
+	europeanDates=false;
+      System.err.println("europeanDates="+europeanDates);
+    }
+  }
+  
   /**
    * Send a query to the backend.  Returns one of the ResultSet
    * objects.
@@ -497,7 +561,8 @@ public class Connection implements java.sql.Connection
 	    case 'N':	// Error Notification
 	      msg = pg_stream.ReceiveString(4096);
 	      PrintStream log = DriverManager.getLogStream();
-	      log.println(msg);
+	      if(log!=null) log.println(msg);
+	      addWarning(msg);
 	      break;
 	    case 'P':	// Portal Name
 	      String pname = pg_stream.ReceiveString(8192);