ClasscastException while displaying image from content selector

Hi,
My requirement is show an image gif file in jsp, through portal.
This problem is specific to 8.1 version.
Created an image type content in BEA repository which i could retrieve from workshop
content preview correctly, with a rule (named filerule).
However, when tried to display the same from a simple jsp logic, got classcast
exception.
Below is the steps i have done.
1. import <%@ page import="com.bea.p13n.content.ContentHelper"%>
2.
<pz:contentSelector rule="filerule" contentHome="<%=ContentHelper.DEF_DOCUMENT_MANAGER_HOME%>"
id="ImageDocs"/>
<es:forEachInArray array="<%=ImageDocs%>" id="anImageDoc" type="com.bea.p13n.content.Content">
<img src="ShowDoc/<cm:printProperty
id="anImageDoc" name="identifier" encode="url"/>"
</es:forEachInArray>
The server console shows below exception:
java.lang.ClassCastException
at jsp_servlet.__index6._jspService(index6.jsp:19)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:402)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at com.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilte
r.java:313)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at com.bea.wlw.netui.pageflow.PageFlowJspFilter.doFilter(PageFlowJspFilt
er.java:208)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispat
cherImpl.java:305)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.superForward(Page
FlowRequestProcessor.java:1304)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor$DefaultHttpRedire
ctor.forward(PageFlowRequestProcessor.java:1320)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.doForward(PageFlo
wRequestProcessor.java:1200)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.processForwardCon
fig(PageFlowRequestProcessor.java:1094)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
va:279)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.process(PageFlowR
equestProcessor.java:651)
at com.bea.wlw.netui.pageflow.AutoRegisterActionServlet.process(AutoRegi
sterActionServlet.java:527)
at com.bea.wlw.netui.pageflow.PageFlowActionServlet.process(PageFlowActi
onServlet.java:152)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:402)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at com.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilte
r.java:313)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispat
cherImpl.java:305)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.superForward(Page
FlowRequestProcessor.java:1304)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor$DefaultHttpRedire
ctor.forward(PageFlowRequestProcessor.java:1320)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.doForward(PageFlo
wRequestProcessor.java:1200)
at com.bea.wlw.netui.pageflow.PageFlowRequestProcessor.process(PageFlowR
equestProcessor.java:638)
at com.bea.wlw.netui.pageflow.AutoRegisterActionServlet.process(AutoRegi
sterActionServlet.java:527)
at com.bea.wlw.netui.pageflow.PageFlowActionServlet.process(PageFlowActi
onServlet.java:152)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:402)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at com.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilte
r.java:313)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationActio
n.run(WebAppServletContext.java:6356)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Authenticate
dSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:
118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:3635)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
>
Also, there is no luck with displaying text content from a file, using printDoc
tag. Can some one point me to right resource.

Hi panji,
I used 7.0 tag lib, just to make use of "printDoc" tag which is available in 7.0version
only and not in 810. However, i figured out a way to display image using 8.1 (
of course, by using request.getContextPath() + "/ShowBinary" + imagedoc.getPath())
But still, i do not find a way to display a doc type file in jsp, which is my
original problem.
As per the edocs at http://edocs.bea.com/workshop/docs81/doc/en/core/index.html,
<cm:getProperty node="<%=doc_node%>" name="file"/>
should be able to display a txt file but nothing is getting rendred onto jsp.
( i have created a book type content in the repo. and file attached is of type
txt ).
Can you pls give some clue what i am missing here?
thanks
Ramana
"Panji Aryaputra" <[email protected]> wrote:
Hi Ramana, could you just use the ShowPropertyServlet to display the
image
in jsp? That's what I am using now. Perhaps you have other reasons not
to
use it?
panji.a
"ramana" <[email protected]> wrote in message
news:[email protected]...
Hi,
My requirement is show an image gif file in jsp, through portal.
This problem is specific to 8.1 version.
Created an image type content in BEA repository which i could retrievefrom workshop
content preview correctly, with a rule (named filerule).
However, when tried to display the same from a simple jsp logic, gotclasscast
exception.
Below is the steps i have done.
1. import <%@ page import="com.bea.p13n.content.ContentHelper"%>
2.
<pz:contentSelector rule="filerule"contentHome="<%=ContentHelper.DEF_DOCUMENT_MANAGER_HOME%>"
id="ImageDocs"/>
<es:forEachInArray array="<%=ImageDocs%>" id="anImageDoc"type="com.bea.p13n.content.Content">
<img src="ShowDoc/<cm:printProperty
id="anImageDoc" name="identifier" encode="url"/>"
</es:forEachInArray>
The server console shows below exception:
java.lang.ClassCastException
at jsp_servlet.__index6._jspService(index6.jsp:19)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
atweblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:971)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:402)
atweblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atcom.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilte
r.java:313)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atcom.bea.wlw.netui.pageflow.PageFlowJspFilter.doFilter(PageFlowJspFilt
er.java:208)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atweblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispat
cherImpl.java:305)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.superForward(Page
FlowRequestProcessor.java:1304)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor$DefaultHttpRedire
ctor.forward(PageFlowRequestProcessor.java:1320)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.doForward(PageFlo
wRequestProcessor.java:1200)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.processForwardCon
fig(PageFlowRequestProcessor.java:1094)
atorg.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
va:279)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.process(PageFlowR
equestProcessor.java:651)
atcom.bea.wlw.netui.pageflow.AutoRegisterActionServlet.process(AutoRegi
sterActionServlet.java:527)
atcom.bea.wlw.netui.pageflow.PageFlowActionServlet.process(PageFlowActi
onServlet.java:152)
atorg.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
atweblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:971)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:402)
atweblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atcom.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilte
r.java:313)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atweblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispat
cherImpl.java:305)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.superForward(Page
FlowRequestProcessor.java:1304)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor$DefaultHttpRedire
ctor.forward(PageFlowRequestProcessor.java:1320)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.doForward(PageFlo
wRequestProcessor.java:1200)
atcom.bea.wlw.netui.pageflow.PageFlowRequestProcessor.process(PageFlowR
equestProcessor.java:638)
atcom.bea.wlw.netui.pageflow.AutoRegisterActionServlet.process(AutoRegi
sterActionServlet.java:527)
atcom.bea.wlw.netui.pageflow.PageFlowActionServlet.process(PageFlowActi
onServlet.java:152)
atorg.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
atweblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:971)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:402)
atweblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atcom.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilte
r.java:313)
atweblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
atweblogic.servlet.internal.WebAppServletContext$ServletInvocationActio
n.run(WebAppServletContext.java:6356)
atweblogic.security.acl.internal.AuthenticatedSubject.doAs(Authenticate
dSubject.java:317)
atweblogic.security.service.SecurityManager.runAs(SecurityManager.java:
118)
atweblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:3635)
atweblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
>
Also, there is no luck with displaying text content from a file, usingprintDoc
tag. Can some one point me to right resource.

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<%@ page contentType="image/jpeg; chaoResult=iso-8859-1" language="java" import="java.sql.*,java.io.*,java.util.*" errorPage="" %>
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Statement oStmt;
ResultSet oResult;
String strConnection = null;
String strUserId = "c_erober";
String strUserPwd = "sybdev99";
String strDatabase = "oraITAS";
String strPhotoId;
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DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());
oDbConn = DriverManager.getConnection(strConnString,strUserId,strUserPwd);
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oResult.next();
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response.getOutputStream().write(bytearray,0,size);
response.flushBuffer();
sImage.close();
oDbConn.close();
} catch (SQLException ex) { ex.getMessage();
%>

Displaying image from database

Hello. I have this problem if anyone can help. I have an image inserted into a MySQL database. But when I try to display it using JSP I get a screen full of funny characters and do not display. The code I use is below.
String sql2 = "Select image1 from images";
ResultSet rs2 = stmt.executeQuery(sql2);
if(rs2.next())
InputStream in = rs2.getBinaryStream("image1");
response.setContentType("image/jpg");
ServletOutputStream sout = response.getOutputStream();
int c;
while((c = in.read()) != -1)
sout.write(c);
in.close();
sout.close();
I tried using the code below, but that don't work either.
%>
<tr>
<td><img src="<%= rs2.getString("image2") %>"></td>
</tr>
<%
What am I doing wrong here? Is it better to grab the image straight out of a directory? If so, how? The image would be on the Tomcat4 server in the root directory.

When a html page is downloaded to the client, each image, css include, *.js include etc.. are fetch one at a time. So you would want to write a servlet that is mapped to something like /database/image/name.jpg and this servlet would be responible for pulling the image from the database, setting the proper MIME type and writing it to the client.
In your case, you are writing the image content to the client within the jsp page. This explains the char's you see within the page.
Things you should do:
Create custom servlet which will pull the images from the database.
map the servlet to what ever patteren you like. (web.xml file you would edit)
Set the mime type and write the image.
I hope this is of help.

Display Images from Database

Hi all,
I require to display images stored in database along with textual description of it on a JSP.
The image file should not be stored intermediately on file system (i.e w/o using img HTML tag)
It is a typical shopping cart appln. where images are fetched from database and the associated description is displayed along side.
Please note that it is the case of Mixed content types(text and binary data).
Thanks and Regards

Like "Breakfast" said, you can do this with a servlet that retrieves your images from a database....
if you create a servlet to do this, you would have a generic servlet which retrieves a picture from a database based upon a key which could be a picture name or number.
Lets say the file is out there in the database as a BLOB or Binary Image... you could have this kind of code in the doPost(HttpRequest req, HttpResponse res) or doService(HttpRequest req, HttpResponse res) method.
The table holding the image has at least two columns one called IMAGE which holds the binary image and the other called FILENAME. If the connection to the DB is already open, you do something like this.
String fileToGet = (String)req.getParameter("FILENAME");
rs = conn.createStatement().executeQuery("select from IMAGE_TABLE where FILENAME='" + fileToGet + "'");
if(rs.next())
InputStream in = rs.getBinaryStream("IMAGE");
res.setContentType("image/jpg"); // or whatever type of file it is.
ServletOutputStream sout = res.getOutputStream();
int c;
while((c = in.read()) != -1)
sout.write(c);
in.close();
sout.close();
This should write your image to the response output of the servlet.
Now, where you want your image, you put.
<img src="/servlet/ImageServlet?FILENAME="thefileIwant">
This should do what you want... Use your favorite pipe copy method to get the input stream to the output stream. If you are worried about overhead and scaling like "breakfast" said (it CAN be a problem in high access sites), then you can add an image caching scheme and get really complex.... But this is a rough idea on what to do.
Hope this helps.
Stephen McConnell

How to display images from BLOB column via APEX 4.0

Hello,
I did the following in order to display images of two Oracle records on the APEX page. I am using APEX Version : 4.0.1.00.03 , Oracle DB Version : 10.2.0.4.0.
1. Created An oracle table TEST_FORM
with 3 columns
( ID number, MIME_TYPE varchar2(255) , Image BLOB )
2. Inserted two records
10001, image/gif, ( actual image1)
10002, image/gif, ( actual image2)
3. created an Oracle procedure
CREATE OR REPLACE PROCEDURE show_my_form ( p_image_id IN test_form.id%type) AS
l_mime test_form.mime_type%type;
l_length NUMBER;
l_file_name VARCHAR2 (2000);
lob_loc test_form.IMAGE%type;
BEGIN
SELECT mime_type, IMAGE
, DBMS_LOB.getlength (IMAGE)
INTO l_mime, lob_loc, l_length
FROM test_form
WHERE id = p_image_id;
owa_util.mime_header(l_mime, false);
htp.p ('Content-length: ' || l_length);
owa_util.http_header_close;
wpg_docload.download_file (lob_loc);
END show_my_form ;
4. In Apex 4.0
step1. Created an interactive report on a new APEX page
step2. Specified the following in the Region Source
select id, mime_type, '<img src="#OWNER#.show_my_form ?p_image_id=#ID#" />' photo
from TEST_FORM
The column result shows as <img src="CCS.show_my_form?p_image_id=#ID#" />
I am unable to display the column image as a link to a proper image photo.
Could you please advise me if I missed anything ?
Thanks a lot.
Regards
Susanna
Edited by: user10318332 on 13/12/2010 15:51
Edited by: user10318332 on 13/12/2010 20:10

Maybe the space you have before the ? is causing issues. there shouldn't be any space.
Your procedure looks to be much the same of one that I have.
Have you granted execute on your procedure?
Also, what version DB are you running? This could be another issue: http://daust.blogspot.com/2006/04/xe-calling-stored-procedures.html
But anyway, you don't need to create your own procedure these days. You could do the following:
in your query, have a column: dbms_lob.getlength(blob) photo ; save, then in column attributes for that column, apply a format mask. There is usually a link below the text box for the format mask - BLOB Download Format Mask, which will help you build the format mask. But it is documented here: http://download.oracle.com/docs/cd/E17556_01/doc/user.40/e15517/advnc.htm#BCGGJHEF
Ta,
Trent

ClasscastException while displaying image from content selector

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