[dbforms] [PATCH] DbBlobContentTag to display db blob fields

[Dziugas Baltrunas]

Hi list,
here is a small patch which adds functionality to display a blob field 
from the database. It currently works only for a "new" blob handling mode.

As I wrote earier, it would be good to receive some hints about blob 
handling strategy in order to make DbTextAreaForBlobs work.

regards,
Dziugas Baltrunas
Index: DbBlobContentTag.java
===================================================================
RCS file: /cvsroot/jdbforms/dbforms/src/org/dbforms/taglib/DbBlobContentTag.java,v
retrieving revision 1.13
diff -u -r1.13 DbBlobContentTag.java
--- DbBlobContentTag.java       12 May 2004 16:14:48 -0000      1.13
+++ DbBlobContentTag.java       16 Jul 2004 12:03:57 -0000
@@ -28,6 +28,7 @@
 import java.sql.ResultSet;
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
+import java.sql.Blob;
 
 import org.dbforms.config.FieldTypes;
 import org.dbforms.util.SqlUtil;
@@ -123,7 +124,18 @@
                      logCat.info("fs- file not found");
                   }
                } else {
-                  throw new IllegalArgumentException("DbBlobContentTag is currently 
only for DISKBLOBS - feel free to copy code from FileServlet.java to this place to 
bring this limitation to an end :=)");
+                  try {
+                     /* TODO: we obviously need a classic mode blob handling here as 
well */
+                     Blob blob = rs.getBlob(1);
+                     BufferedReader br =
+                     new BufferedReader(new 
InputStreamReader(blob.getBinaryStream()));
+                     char[] c = new char[1024];
+                     int read;
+                     while ((read = br.read(c)) != -1)
+                        contentBuf.append(c, 0, read);
+                  } catch (NullPointerException e) {
+                     // the blob field was empty
+                  }
                }
             } else {
                logCat.info("fs- we have got no result" + queryBuf);