import org.postgresql.Connection;
import org.postgresql.largeobject.LargeObject;
import org.postgresql.largeobject.LargeObjectManager;
+import org.postgresql.largeobject.BlobInputStream;
import mir.entity.*;
import mir.misc.*;
/**
* Diese Klasse enthält die Daten eines MetaObjekts
*
- * @author RK
- * @version 11.11.2000
+ * @author RK, mh
+ * @version $Id: EntityImages.java,v 1.8 2002/11/04 04:35:21 mh Exp $
*/
public class EntityImages extends EntityUploadedMedia
{
+
+ Random r = new Random();
+
public EntityImages()
{
super();
// methods
-
- public byte[] getImage() throws StorageObjectException
+ public InputStream getImage() throws StorageObjectException
{
theLog.printDebugInfo("--getimage started");
java.sql.Connection con=null;Statement stmt=null;
- byte[] img_data=null;
+ BlobInputStream in; InputStream img_in = null;
try {
con = theStorageObject.getPooledCon();
con.setAutoCommit(false);
LargeObjectManager lom;
- java.sql.Connection jCon;
- stmt = con.createStatement();
+ java.sql.Connection jCon;
+ stmt = con.createStatement();
ResultSet rs = theStorageObject.executeSql(stmt,
"select image_data from images where id="+getId());
- jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
- .getNativeConnection();
- lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
+ jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
+ .getNativeConnection();
+ lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
if(rs!=null) {
- if (rs.next()) {
- LargeObject lob = lom.open(rs.getInt(1));
- img_data = lob.read(lob.size());
- lob.close();
- //img_data = rs.getBytes(1);
- }
- rs.close();
+ if (rs.next()) {
+ LargeObject lob = lom.open(rs.getInt(1));
+ in = (BlobInputStream)lob.getInputStream();
+ img_in = new ImageInputStream(in, con, stmt);
+ }
+ rs.close();
}
} catch (Exception e) {
- e.printStackTrace();
- theLog.printError("EntityImages -- getImage failed"+e.toString());
- throwStorageObjectException(e, "EntityImages -- getImage failed: ");
- }
- finally {
- try {
- con.setAutoCommit(true);
- } catch (Exception e) {
- e.printStackTrace();
- theLog.printError(
- "EntityImages -- getImage reseting transaction mode failed"
- +e.toString());
- }
- theStorageObject.freeConnection(con,stmt);
- }
-
- return img_data;
+ e.printStackTrace();
+ theLog.printError("EntityImages -- getImage failed"+e.toString());
+ throwStorageObjectException(e, "EntityImages -- getImage failed: ");
+ try {
+ con.setAutoCommit(true);
+ } catch (Exception e2) {
+ e.printStackTrace();
+ theLog.printError(
+ "EntityImages -- getImage reseting transaction mode failed"
+ +e2.toString());
+ }
+ theStorageObject.freeConnection(con,stmt);
+ }
+ //}
+ return img_in;
}
- public void setImage(byte[] uploadData, String type)
+ public void setImage(InputStream in, String type)
throws StorageObjectException {
- if (uploadData!=null) {
+ if (in!=null) {
java.sql.Connection con=null;PreparedStatement pstmt=null;
+ File f = null;
try {
theLog.printDebugInfo("settimage :: making internal representation of image");
- WebdbImage webdbImage= new WebdbImage(uploadData, type);
+
+ String fName = MirConfig.getProp("TempDir")+File.separator+r.nextInt();
+ f = new File(fName);
+ FileUtil.write(f, in);
+ WebdbImage webdbImage= new WebdbImage(f, type);
theLog.printDebugInfo("settimage :: made internal representation of image");
- byte[] imageData = webdbImage.getImage();
- theLog.printDebugInfo("settimage :: getImage");
- byte[] iconData = webdbImage.getIcon();
- theLog.printDebugInfo("settimage :: getIcon");
-
-
- if (iconData!=null && imageData!=null) {
- con = theStorageObject.getPooledCon();
- con.setAutoCommit(false);
- theLog.printDebugInfo("settimage :: trying to insert image");
-
- // setting values
- LargeObjectManager lom;
- java.sql.Connection jCon;
- jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
- .getNativeConnection();
- lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
- int oidImage = lom.create();
- int oidIcon = lom.create();
- LargeObject lobImage = lom.open(oidImage);
- LargeObject lobIcon = lom.open(oidIcon);
- lobImage.write(imageData);
- lobIcon.write(iconData);
- lobImage.close();
- lobIcon.close();
- String sql = "update images set img_height='"
- +webdbImage.getImageHeight() +
- "',img_width='" + webdbImage.getImageWidth() +
- "',icon_height='" + webdbImage.getIconHeight() +
- "',icon_width='" + webdbImage.getIconWidth()
- + "', image_data="+oidImage+", icon_data="+oidIcon
- +" where id="+getId();
- theLog.printDebugInfo("settimage :: updating sizes: "+ sql);
- pstmt = con.prepareStatement(sql);
- //pstmt.setBytes(1, imageData);
- //pstmt.setBytes(2, iconData);
- pstmt.executeUpdate();
- sql="update content set is_produced='0' where to_media="+getId();
- pstmt = con.prepareStatement(sql);
- pstmt.executeUpdate();
- }
+
+ con = theStorageObject.getPooledCon();
+ con.setAutoCommit(false);
+ theLog.printDebugInfo("settimage :: trying to insert image");
+
+ // setting values
+ LargeObjectManager lom;
+ java.sql.Connection jCon;
+ jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
+ .getNativeConnection();
+ lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
+ int oidImage = lom.create();
+ int oidIcon = lom.create();
+ LargeObject lobImage = lom.open(oidImage);
+ LargeObject lobIcon = lom.open(oidIcon);
+ webdbImage.setImage(lobImage.getOutputStream());
+ webdbImage.setIcon(lobIcon.getOutputStream());
+ lobImage.close();
+ lobIcon.close();
+ String sql = "update images set img_height='"
+ +webdbImage.getImageHeight() +
+ "',img_width='" + webdbImage.getImageWidth() +
+ "',icon_height='" + webdbImage.getIconHeight() +
+ "',icon_width='" + webdbImage.getIconWidth()
+ + "', image_data="+oidImage+", icon_data="+oidIcon
+ +" where id="+getId();
+ theLog.printDebugInfo("settimage :: updating sizes: "+ sql);
+ pstmt = con.prepareStatement(sql);
+ //pstmt.setBytes(1, imageData);
+ //pstmt.setBytes(2, iconData);
+ pstmt.executeUpdate();
+ sql="update content set is_produced='0' where to_media="+getId();
+ pstmt = con.prepareStatement(sql);
+ pstmt.executeUpdate();
}
catch (Exception e) {throwStorageObjectException(e, "settimage :: setImage gescheitert: ");}
finally {
- try { if (con!=null) con.setAutoCommit(true); } catch (Exception e) {;}
- theStorageObject.freeConnection(con,pstmt); }
+ try {
+ if (con!=null)
+ con.setAutoCommit(true);
+ // get rid of the temp. file
+ f.delete();
+ } catch (Exception e) {;}
+ theStorageObject.freeConnection(con,pstmt);
+ }
}
}
super.setValues(theStringValues);
}
- public byte[] getIcon() throws StorageObjectException
+ /**
+ * Takes an OutputStream as an argument and reads in the data
+ * from the DB and writes it to the OutputStream.
+ *
+ * It will also take care of closing the OutputStream.
+ */
+ public InputStream getIcon() throws StorageObjectException
{
java.sql.Connection con=null;Statement stmt=null;
- byte[] img_data=null;
+ BlobInputStream in=null;ImageInputStream img_in=null;
try {
con = theStorageObject.getPooledCon();
con.setAutoCommit(false);
- LargeObjectManager lom;
- java.sql.Connection jCon;
+ LargeObjectManager lom;
+ java.sql.Connection jCon;
stmt = con.createStatement();
ResultSet rs = theStorageObject.executeSql(stmt,
"select icon_data from images where id="+getId());
- jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
+ jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
.getNativeConnection();
- lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
+ lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
if(rs!=null) {
if (rs.next()) {
- LargeObject lob = lom.open(rs.getInt(1));
- img_data = lob.read(lob.size());
- lob.close();
- //img_data = rs.getBytes(1);
+ LargeObject lob = lom.open(rs.getInt(1));
+ in = (BlobInputStream)lob.getInputStream();
+ img_in = new ImageInputStream( in, con ,stmt);
+ //img_data = rs.getBytes(1);
}
- rs.close();
+ rs.close();
}
} catch (Exception e) {
- e.printStackTrace();
- theLog.printError("EntityImages -- getIcon failed"+e.toString());
- throwStorageObjectException(e, "EntityImages -- getIcon failed:");
- } finally {
- try {
- con.setAutoCommit(true);
- } catch (Exception e) {
- e.printStackTrace();
- theLog.printError(
- "EntityImages -- getIcon reseting transaction mode failed"
- +e.toString());
- }
- theStorageObject.freeConnection(con,stmt);
- }
-
- return img_data;
+ e.printStackTrace();
+ theLog.printError("EntityImages -- getIcon failed"+e.toString());
+ throwStorageObjectException(e, "EntityImages -- getIcon failed:");
+ try {
+ con.setAutoCommit(true);
+ } catch (Exception e2) {
+ e.printStackTrace();
+ theLog.printError(
+ "EntityImages -- getIcon reseting transaction mode failed"
+ +e2.toString());
+ }
+ theStorageObject.freeConnection(con,stmt);
+ }
+
+ return img_in;
}
+ /**
+ * a small wrapper class that allows us to store the DB connection resources
+ * that the BlobInputStream is using and free them upon closing of the stream
+ */
+ private class ImageInputStream extends InputStream {
+
+ InputStream _in;
+ java.sql.Connection _con;
+ Statement _stmt;
+
+ public ImageInputStream(BlobInputStream in, java.sql.Connection con,
+ Statement stmt )
+ {
+ _in = in;
+ _con = con;
+ _stmt = stmt;
+ }
+
+ public void close () throws IOException {
+ _in.close();
+
+ try {
+ _con.setAutoCommit(true);
+ theStorageObject.freeConnection(_con,_stmt);
+ } catch (Exception e) {
+ throw new IOException("close(): "+e.toString());
+ }
+ }
+
+ public int read() throws IOException {
+ return _in.read();
+ }
+
+ }
+
}
projects / mir.git / blobdiff