Passing objects to a applet.

hi there,
i have a jsp and a applet. i need to pass an object from my jsp to the applet and the applet will present the results.
how can i do it?? how do i pass objects to the applet??
thanks

you typically pass strings as applet parameters in the page.
otherwise, you have your applet connect back to the server with a socket or URLConnection to a servlet, which can send serialized objects if that's what you need, or other data.

Similar Messages

How to passing object to the applet?

Dear All,
My project is needed to read the xml file (include the form content) and then parse the xml file to create the related object, so using the applet to display this dynamic form.
Due to cannot directly open the file object and the applet, the following is my idea:
1. ) In the servlet, first to new the fileinputstream object , then pass the object into the applet. But this idea is not allowed.
Only String value can use the param to to pass the parameter value to the applet using <param name = \"cis_auditID\" value = \""+inputsource+"\">.
2. ) Firstly , read the file and then create specific object before call applet class. I know some people said that using the URLConnection, but i don't know for this. Can only one give more detail description about that.
So how can i pass the fileinputstream or the own created object into the applet?
Urgent! Please help!

Where is the xml file located??
If it's on the same server that serves the applet or if it's dynamically generated
by making a http request to a servlet you should use URL and URLConnection.
URL u = new URL(this.getCodeBase(),"../relativeDir/xmlFile.xml");
URLConnection uc = u.openConnection();
InputStream = uc.getInputStream();
// read the rest of the struff.
You might want to take a look at this example if you want to send (POST data) to
the server when you make a http request to a servlet:
http://forums.java.sun.com/thread.jspa?threadID=645830&tstart=0
3rd post

Issue with passing parameters to an applet?

Hi,
I have an apex page which is a popup page. I am passing parameters to the applet and then reading them in from my java code.
Here is my applet code
<SCRIPT>
function getStatus(retStatus) {
    $s("P3_MESSAGE", ''||retStatus||'')
</SCRIPT>
<APPLET ARCHIVE="/i/bin/offline_load.zip" CODE="offline_load.class" STATUSMSG WIDTH=0 HEIGHT=0>
<PARAM name="username" value="&APP_USER.">
<PARAM name="dbuser" value="&P3_DBUSER.">
<PARAM name="dbpassword" value="&P3_DBPASSWORD.">
<PARAM name="dbserver" value="&P0_DBSERVER.">
<PARAM name="dbport" value="&P3_DBPORT.">
<PARAM name="dbsid" value="&P3_DBSID.">
</APPLET>P3_DBUSER, P3_DBPASSWORD, etc are all defined on page zero as hidden and protected items
My applet code
public void init() {
    CallableStatement load_stmt = null;
    String userName = this.getParameter("username");
    String dbUser = this.getParameter("dbuser");
    String dbPass = this.getParameter("dbpassword");
    String dbServer = this.getParameter("dbserver");
    String dbPort = this.getParameter("dbport");
    String dbSid = this.getParameter("dbsid");
    try {
      System.out.println("init(): loading OracleDriver for applet created at " + created.toString());
      Class.forName("oracle.jdbc.driver.OracleDriver");
      System.out.println("init(): getting connection");
      conn = DriverManager.getConnection("jdbc:oracle:thin:@" + dbServer + ":" + dbPort + ":" + dbSid, dbUser, dbPass);
    } // end tryThe odd thing is I have gotten this working twice then unexpectedly it just stops working when I make a change to the java applet code.
And the changes have absolutely nothing to do with the above code it can be anything the first time was error handling I added
to another section and the second I modified a stored procedure call.
Anyone have any idea why this might be occurring as this is driving me completely insane :(
Thanks in advance

Hi,
In your init() code, you have a "try" block - do you have a "finally" block to close the connection? Something like:
finally {
try {
    conn.close();
catch (Exception ignore) {
}Could it be that you have reached the limit of the number of available open connections?
Your code looks ok as far as I can see (based on examples at: http://www.orafaq.com/wiki/JDBC )
Also, in your new bits of code, have you added try/catch/finally blocks? Does the code compile fully (ie, no warnings)? Have you added new imports that may conflict with existing code such that you have to fully qualify existing objects/classes (eg, you may now have two DriverManager classes or CallableStatement objects)?
Andy

Passing objects by reference in PL/SQL

Hi,
I have come across an unexpected problem using object types in PL/SQL that is causing me some grief. I'm from a Java background and am relatively new to Oracle Objects but what I'm trying to do is fairly trivial, I think. The code below illustrates the problem.
--- cut here ---
CREATE OR REPLACE TYPE test_obj_t AS OBJECT
num INTEGER,
CONSTRUCTOR FUNCTION test_obj_t RETURN SELF AS RESULT
CREATE OR REPLACE TYPE BODY test_obj_t IS
CONSTRUCTOR FUNCTION test_obj_t RETURN SELF AS RESULT IS
BEGIN
num := 0;
RETURN;
END;
END;
CREATE OR REPLACE PACKAGE test_obj_ref AS
PROCEDURE init(o IN test_obj_t);
PROCEDURE inc;
FUNCTION get_num RETURN INTEGER;
END;
CREATE OR REPLACE PACKAGE BODY test_obj_ref IS
obj test_obj_t;
PROCEDURE init(o IN test_obj_t) IS
BEGIN
obj := o;
END;
PROCEDURE inc IS
BEGIN
obj.num := obj.num + 1;
END;
FUNCTION get_num RETURN INTEGER IS
BEGIN
RETURN obj.num;
END;
END;
--- cut here ---
The object type test_obj_t holds a integer and the test_obj_ref package holds a 'reference' to an instance of the object.
To test the above code I run this PL/SQL block:
declare
obj test_obj_t;
begin
obj := test_obj_t;
test_obj_ref.init(obj);
dbms_output.put_line('obj.num='||obj.num);
dbms_output.put_line('test_obj_ref.get_num='||test_obj_ref.get_num);
test_obj_ref.inc;
dbms_output.put_line('obj.num='||obj.num);
dbms_output.put_line('test_obj_ref.get_num='||test_obj_ref.get_num);
test_obj_ref.inc;
dbms_output.put_line('obj.num='||obj.num);
dbms_output.put_line('test_obj_ref.get_num='||test_obj_ref.get_num);
end;
giving the output:
obj.num=0
test_obj_ref.get_num=0
obj.num=0
test_obj_ref.get_num=1
obj.num=0
test_obj_ref.get_num=2
It appears that the object held by the test_obj_ref package is being incremented as expected, but I would have expected the object declared in the PL/SQL block to be pointing to the same object and so should report the same incremented values.
I suspect that the object is copied in the call to test_obj_ref.init() so I end up with two object instances, one that is held by the test_obj_ref package and one in the anonymous block. Although, I thought that all IN parameters in PL/SQL are passed by reference and not copied!
Am I right?
Is passing objects by reference possible in PL/SQL, if so how?
I'm using Oracle 10.2.0.3.
Cheers,
Andy.

the object being passed to the test_obj_ref.init+ procedure is passed by reference; however, when you assign it to your package variable obj it is being copied to a new instance. you can pass object instances as parameters to procedures using the +IN OUT [NOCOPY]+ *calling mode, in which case modifications to the attributes of the passed object will be reflected in the calling scope's instance variable.
oracle's only other notion of an object reference is the +"REF <object-type>"+ datatype, which holds a reference to an object instance stored in an object table or constructed by an object view.
hope this helps...
gerard

Passing object as parameter in JSF using h:commandLink tag

Hi ,
I have a scenario in which i need to pass objects from one jsp to another using h:commandLink. i read balusC article "Communication in JSF" and found a basic idea of achieving it. Thanks to BalusC for the wonderful article. But i am not fully clear on the concepts and the code is giving some error. The code i have is
My JSP:
This commandlink is inside a <h:column> tag of <h:dataTable>
<h:commandLink id="ol3"action="ManageAccount" actionListener="#{admincontroller.action}" >
               <f:param id="ag" name="account" value="#{admincontroller.account}" />
               <h:outputText id="ot3" value="Manage Account" rendered="#{adminbean.productList!=null}" />
               </h:commandLink>
Also a binding in h:dataTable tag with the binding="#{admincontroller.dataTable}"
                  My Backing Bean:
public class CompanyAdminController {
          private HtmlDataTable dataTable;
          private Account account=new Account();
public HtmlDataTable getDataTable() {
        return dataTable;
public Account getAccount() {
         return this.account;
public void setAccount(Account account) {
          this.account = account;
      public void action(){
            account= (Account)this.getDataTable().getRowData();
       } faces-config.xml
<navigation-rule>
    <from-view-id>/compadmin.jsp</from-view-id>
    <navigation-case>
      <from-outcome>ManageAccount</from-outcome>
      <to-view-id>/manageAccount.jsp</to-view-id>
    </navigation-case>
</navigation-rule>
<managed-bean>
          <managed-bean-name>admincontroller</managed-bean-name>
          <managed-bean-class>com.forrester.AdminController</managed-bean-class>
          <managed-bean-scope>request</managed-bean-scope>
          <managed-property>
               <property-name>account</property-name>
               <property-class>com.model.Account</property-class>
               <value>#{param.account}</value>
         </managed-property>
     </managed-bean>My account object:
public class Account {
string name;
public String getName()
    return this.name;
public void setName(String name)
       this.name=name;
}I need to display #{admincontroller.account.name} in my forwarded jsp. But I am not sure whether the code i wrote in commandlink is correct. I get an error if i use <f:setActionListener> . No tag "setPropertyActionListener" defined in tag library imported with prefix "f"
Please advise.
Edited by: twisai on Oct 18, 2009 11:46 AM
Edited by: twisai on Oct 18, 2009 11:47 AM
Edited by: twisai on Oct 18, 2009 11:48 AM

Yes.. iam removed the managedproperty from faces-config. But still i get the null pointer exception on main jsp itself and i am taken to second jsp manageaccount.jsp. Did you find anything wrong in my navigation case in the action method??
                                 public String loadAccount(){
           Account account = (Account)this.getDataTable().getRowData();
            return "ManageAcct";And also can you please answer this question i have
The AdminController is the backing bean of 1st JSP and manageAccontController is the backing bean of forwarded JSP .
Can i put this action method and dataTable binding in a 2nd manageAccontController backing bean instead of AdminController. But if i do that way dataList binding in h:dataTable tag will be in first JSP backing bean and dataTable binding to 2nd JSP. Not sure how to deal with this.
{

Passing parameter between two applets

hi all,
i want to pass parameter between two applets. in other words, when user clicks the button; close the running applet, pass parameter to another applet and run another applet.
now i think that could be, ( creating a parameter table in database, when user click on button write parameters to table and stop active applet and run other applet. when other applet runs in init methot it takes parameter from table). but it will be very indirect way.
if you have an idea or information, plesae tell me.
thanks for your interest

Hi ,
Plz pay a visit to this wonderful website,
http://www.rgagnon.com/javadetails/java-0022.html / http://www.rgagnon.com/howto.html
Best Wishes,
Gaurav
PS : Thanks to Real Gagnon. This is all I can do at this stage, but wanted to say you are doing a wonderful job.

Memory leak problem while passing Object to stored procedure from C++ code

Hi,
I am facing memory leak problem while passing object to oracle stored procedure from C++ code.Here I am writing brief description of the code :
1) created objects in oracle with the help of "create or replace type as objects"
2) generated C++ classes corresponding to oracle objects with the help of OTT utility.
3) Instantiating classes in C++ code and assigning values.
4) calling oracle stored procedure and setting object in statement with the help of setObject function.
5) deleted objects.
this is all I am doing ,and getting memory leak , if you need the sample code then please write your e-mail id , so that I can attach files in reply.
TIA
Jagendra

just to correct my previous reply , adding delete statement
Hi,
I am using oracle 10.2.0.1 and compiling the code with Sun Studio 11, following is the brief dicription of my code :
1) create oracle object :
create or replace type TEST_OBJECT as object
( field1 number(10),
field2 number(10),
field3 number(10) )
2) create table :
create table TEST_TABLE (
f1 number(10),f2 number (10),f3 number (10))
3) create procedure :
CREATE OR REPLACE PROCEDURE testProc
data IN test_object)
IS
BEGIN
insert into TEST_TABLE( f1,f2,f3) values ( data.field1,data.field2,data.field3);
commit;
end;
4) generate C++ classes along with map file for database object TEST_OBJECT by using Oracle OTT Utility
5) C++ code :
// include OTT generate files here and other required header files
int main()
int x = 0;
int y = 0;
int z =0;
Environment *env = Environment::createEnvironment(Environment::DEFAULT);
Connection* const pConn =
env->createConnection"stmprf","stmprf","spwtrgt3nms");
const string sqlStmt("BEGIN testProc(:1) END;");
Statement * pStmt = pConn->createStatement(sqlStmt);
while(1)
TEST_OBJECT* pObj = new TEST_OBJECT();
pObj->field1 = x++;
pObj->field2 = y++;
pObj->field3 = z++;
pStmt->setObject(1,pObj);
pStmt->executeUpdate();
pConn->commit();
delete pObj;
}

Hoe to pass object as a parameter thru webSerive

I need to pass Object as a parameter to web service:
example:
public calss returnCodes{
int ret_code;
String ret_string;
public retrunCodes(int ret_code, String ret_string){
this.ret_code = ret_code;
this.ret_string = ret_string;
public int getret_code()
return this.ret_code;
public String getret_string {
return this,ret_string
and other repc holder class to hold returnCodes
public class retrunCodesHolder implents javax.xml.rpc.Holder
returnCode value;
pubic returnCodesHolder(){
public returnCodesHolder(returnCodes value) {
this.value = value;
In Webservice I use returnCodesHolder as parameter.
WebService getReturnCodesWs I have
returnCodes retCodes = new returnCodes(04,"Good return code)
returnCodesHolder retholder = new returnCodesHolder(retCodes)
return myString;
When I am calling above webService in servlet I have code:
org.test.mytest.returnCodesHolder retHolder = new org.test.mytest.returnCodesHolder();
String result = port.getReturnCodesWs(retHolder);
How to I access /get values of returnCodes class in my calling servlet?
I am using Tomcat v 6.0

I believe (although have never used, so if I'm wrong,
correct me please!) you can do it with implicit
dynamic cursors, such as:
For rec in 'select col1, col2 from table 1 '||lstr
loop
Not really:
michaels> declare
   lstr   varchar2 (30) := ' where empno = 7788';
begin
   for rec in 'select * from emp e ' || lstr
   loop
      null;
   end loop;
end;
Error at line 1
ORA-06550: line 5, column 4:
PLS-00103: Encountered the symbol "LOOP" when expecting one of the following:
   . ( * @ % & - + / at mod remainder rem .. <an exponent (**)>
   ||

How to POST an object in an Applet to a JSP server?

I'm trying to realize such a functionality: when the 'Submit' button of a form is clicked, the form fields as well as a 'byte[]' object in an Applet in the page are POSTed to the JSP server. How to implement this?
PS I hope I'm posting in the right forum.

You could do something like this. Probably you want to make it more generic to be able to add an arbitrary number of fields, but I hope you get an idea.
private void postData() {
       URL url = new URL(/* your url here */);
       URLConnection connection = url.openConnection();
       String boundary = "----------" + Long.toHexString(System.currentTimeMillis());
       connection.setRequestProperty("method", "POST");
       connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
       String name1;        // the name of the first field
       String value1;       // the value of the first field
       String name2;        // the name of the second field
       byte[] value2array; // the value of the second field or some object converted to a byte array
       String output =
               "--" + boundary + "\r\n"
               + "Content-Disposition: form-data; name=\"" + name1 + "\"\r\n"
               + "Content-Type: text/plain\r\n"
               + "Content-Transfer-Encoding: quoted-printable\r\n\r\n"
               + value1 + "\r\n"
               + "--" + boundary + "\r\n"
               + "Content-Disposition: form-data; name=\""+ name2 +"\"\r\n"
               + "Content-Type: image/png\r\n"
               + "Content-Transfer-Encoding: base64\r\n\r\n"
               + new String(value2array) + "\r\n"
               + "--" + boundary + "--\r\n";
       connection.setDoOutput(true);
       connection.getOutputStream().write(output.getBytes());
       connection.connect();
}

Passing Objects to Stored Procedures in SQL Queries: UNREF(REF(o))

To me it seems that passing an object (type) to stored procedure in a SQL query is quite laborious. See:
I created the following simple type:
TYPE LAST AS OBJECT (
id NUMBER
defined a function:
FUNCTION "CHECKLAST" (l LAST)
RETURN NUMBER
AS LANGUAGE JAVA
NAME 'Checker.checkLast(Last) return int';
created a typed table:
CREATE TABLE lastTable OF Last;
inserted some objects:
INSERT INTO lastTable VALUES (1003);
NOW! If want to use the StoredFunction I have to use the following syntax:
SELECT checkLast(DEREF(REF(o)))
FROM lasttable o;
That's not very elegant.
I would expect the follwing to be working:
SELECT checkLast(o)
FROM lasttable o;
Did I do something wrong? Or did Oracle forget to implement the simple syntax?
Even worse, the DEREF(REF(o)) trick does not work for member functions...
Regards,
André

I did some experiments and can now (partly) answer my own question:
Indeed, it is possible to declare a function with a parameter passed as reference:
CREATE OR REPLACE TYPE Point AS OBJECT
ID INT,
MEMBER FUNCTION distance(q IN REF Point) RETURN NUMBER
Unfortunately, it is not possible to use the REF in PL/SQL directly:
CREATE OR REPLACE TYPE BODY Point is
MEMBER FUNCTION distance(q IN REF Point) RETURN NUMBER
AS
BEGIN
RETURN q.ID - SELF.ID; --Error(5,14): PLS-00536: No navigation through REF
END;
end;
So, for testing purposes I decided to implement a very simple PL/SQL member function:
CREATE OR REPLACE TYPE BODY Point is
MEMBER FUNCTION distance(q IN REF Point) RETURN NUMBER
AS
BEGIN
RETURN -1;
END;
end;
BUT: The SQL query without VALUE is still not possible. The query
SELECT *
FROM PointTable d, PointTable e
WHERE d.distance(e) > 0
renders ORA-00904: "E": invalid identifier
Somehow the 'e' seems to be misinterpreted completely.
Illogically, the following query works fine:
SELECT *
FROM PointTable d, PointTable e
WHERE d.distance(REF(e)) > 0
The illogical thing is that, now 'E' seems to refer to a VALUE and not to REF (because we can use the REF function), whereas in Gaverill's post 'O' seems to refer to a REF (because we can use the VALUE function).
My intent is to avoid both the VALUE(o) from Gaverill's example and the REF(e) from my example, because both is not intuitive for end users...
Maybe I have to define a VIEW holding the object values... But then the end user has to use it in the FROM part.
All in all, there seems to be no elegant solution for passing objects as parameters to functions...
Regards,
André

Can we pass objects to pl/sql block

hi,
can we pass objects to pl/sql block.i think we can.how to pass it.help me in getting the examples of "passing objects to pl/sql block"

What exactly do you mean ? You can pass objects like any other parameters
into and out from procedures/functions:
SQL> create or replace procedure get_object(myobj in out nocopy my_obj)
2 is
3 begin
4   dbms_output.put_line('ID : ' || myobj.empno);
5   dbms_output.put_line('Salary : ' || myobj.sal);
6   dbms_output.put_line('Department : ' || myobj.deptno);
7   myobj.sal := myobj.sal*2;
8 end;
9 /
Procedure created.
SQL> declare
2   mo my_obj := my_obj(1,1000,10);
3 begin
4   get_object(mo);
5   dbms_output.put_line('New salary : ' || mo.sal);
6 end;
7 /
ID : 1
Salary : 1000
Department : 10
New salary : 2000
PL/SQL procedure successfully completed.Rgds.

Passing Object parameters to Procedures in Oracle

Hi,
Can any one please provide me with a sample example how to pass object types as parameters (IN) to a procedure/package.
Thanks in Advance.

Here is a simple example
SQL> create or replace type tbl as table of number
2 /
Type created.
SQL> create or replace procedure proc(pTbl tbl)
2 as
3 begin
4     for i in 1..pTbl.count
5     loop
6             dbms_output.put_line(pTbl(i));
7     end loop;
8 end;
9 /
Procedure created.
SQL> exec proc(tbl(1,2,3,4,5))
1
2
3
4
5
PL/SQL procedure successfully completed.

Passing parameters from an applet to a URL

I need to pass information from an applet to an html page or JSP page, is this possible? Thanks.

Yes you can!
The following code might works (with some modifications ;)):
AppletContext context = this.getAppletContext();
URL url = new URL("http://host:port/path?parameter=value");
context.showDocument(url, "windowName");In addiction, consider java.net.URLEncoder.encode() method to encode properly your parameters.
Regards
Paolo

Passing parameters to an applet

Hello,
I'm developing a set of services supported by CORBA; the services are all done and tested OK with a command-line client. However, the final client will be an applet and I'm having trouble starting it. The command-line client was started with a command-line argument like "java -Xbootclasspath/p:/usr/share/java/JOB/OB.jar myApp" and it's lacking is causing problems whilst starting the applet. How do I pass this argument to the applet? Is it possible to set it via System.getProperties().put(...) ?
Thanks in advance! :)

Hi,
search the web by google for passing parameter to java applet. These words gave me a lot of links related to this topic.
L.P.

Passing parameters to an applet dynamically

I am looking for suggestions on how I can pass parameters to my applet which generates a simple bar graph. If I pass parameter names and values using HTML tags the number of bars are fixed. I want my applet to accept variable number of values for the x and y axes.

Then use a JSP for the HTML page. This can then pass dynamically generated numbers as params. Alternatively, your applet could communicate to the server through a Socket (package java.net) - although this can cause problems if there are firewalls inbetween client and server.

Passing objects to a applet.

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