Sample code - webdynpro java Handheld.

Dear all,
I am new to webdynpro java handheld.
I need sample code for
1. how to get a value from context element.
2. how set a value in a context element.
3. how to create a context and bind.
and any sample tutorial available with create,update,retrieval, delete operations.
I have modeled a data object in DOE with all operation (c,u,r.d).
present i am trying develop a handheld application for the object.
I have created query,and costume operations in services component.
But i am unable use the service component (becuse lake of coding knowledge)
please help me
lakshman balanagu

Hi,
Please go thorugh the following document for the sample code you had asked for.
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/40fcc34f-af0e-2e10-41b3-f1f60bcb5a7f?quicklink=index&overridelayout=true
There are code snippets mentioned here.
You will get answers for your queries there in the documents.
Hope this helps.
Thanks,
Lakshmi

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Hi:
when I ran the sample code(c:\weblogic\examples\jndi\WebLogicContextExample.java) occuring some errors.
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C:\weblogic>java examples.jndi.WebLogicContextExample
WebGain Java! JustInTime Compiler Version 4.00.002(x) for JDK 1.2
Copyright (C) 2000 WebGain, Inc.
null
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at weblogic.common.internal.WLObjectInputStreamBase.readObjectBody(WLObj
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at javax.naming.InitialContext.<init>(InitialContext.java:146)
at examples.jndi.WebLogicContextExample.main(WebLogicContextExample.java
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Initial context created
Subcontext 'example' created
Bound 'Example String created at 2000/1/3 下午 05:48:18' to 'example.one' for th
e first time.
Example finished successfully.

This is very likely a CLASSPATH issue. Make sure weblogicaux.jar is
at the head of your CLASSPATH.
Mike
"pamal" <[email protected]> wrote in message
news:[email protected]...
I just installed 5.1 with sp2 and have the same problem. Anyone know
about this one?
Anny Chen wrote:
Hi:
when I ran the sample
code(c:\weblogic\examples\jndi\WebLogicContextExample.java) occuring some
errors.
Any Body can help me. Thx a lot!
Anny Chen
Here's error message:
C:\weblogic>java examples.jndi.WebLogicContextExample
WebGain Java! JustInTime Compiler Version 4.00.002(x) for JDK 1.2
Copyright (C) 2000 WebGain, Inc.
null
java.lang.NoSuchMethodError: java.lang.NoSuchMethodException:getNameInNamespace
>>
atweblogic.jndi.toolkit.BasicWLContext_WLStub.ensureInitialized(BasicWL
Context_WLStub.java:127)
atweblogic.jndi.toolkit.BasicWLContext_WLStub.<init>(BasicWLContext_WLS
tub.java:146)
at java.lang.reflect.Constructor.newInstance(Native Method)
atweblogic.common.internal.ClassTableEntry.newInstance(ClassTableEntry.
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atweblogic.common.internal.WLObjectInputStreamBase.readLeftover(WLObjec
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atweblogic.common.internal.WLObjectInputStreamBase.readObjectBody(WLObj
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atweblogic.common.internal.WLObjectInputStreamBase.readObject(WLObjectI
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atweblogic.jndi.toolkit.WLContextStub.readExternal(WLContextStub.java:7
9)
atweblogic.common.internal.WLObjectInputStreamBase.readPublicSerializab
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atweblogic.common.internal.WLObjectInputStreamBase.readLeftover(WLObjec
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atweblogic.common.internal.WLObjectInputStreamBase.readObjectBody(WLObj
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atweblogic.common.internal.WLObjectInputStreamBase.readObjectWL(WLObjec
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atweblogic.jndi.WLInitialContextFactoryDelegate.newRemoteContext(WLInit
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atweblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialCont
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atjavax.naming.spi.NamingManager.getInitialContext(NamingManager.java:7
71)
atjavax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:169
at javax.naming.InitialContext.<init>(InitialContext.java:146)
atexamples.jndi.WebLogicContextExample.main(WebLogicContextExample.java
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Initial context created
Subcontext 'example' created
Bound 'Example String created at 2000/1/3 下午 05:48:18' to'example.one' for th
e first time.
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A very important place where you will use JAVA in XI is while doing your Mapping. There will be cases when JAVA MAPPING is the best solution to go for. There are 2 types of Parsers available for JAVA Mapping. DOM Parser and SAX parser. Just got through the following links to understand more on Java Mapping and the APIs available.http://java.sun.com/j2se/1.4.2/docs/api/javax/xml/parsers/package-summary.html http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/Document.html http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html /people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-i
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sample code for java mapping
Re: Example code DOM PARSER API -
http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html DOM --- /people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs tutorial sax and dom
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Use a Good Subject Line, One Question Per Posting - Award Points

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Thanks
Namrata

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<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/b5380089-0c01-0010-22ae-bd9fa40ddc62">https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/b5380089-0c01-0010-22ae-bd9fa40ddc62</a>
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<a href="http://help.sap.com/saphelp_erp2004/helpdata/en/b5/424f9c88970f48ba918ad68af9a656/frameset.htm">http://help.sap.com/saphelp_erp2004/helpdata/en/b5/424f9c88970f48ba918ad68af9a656/frameset.htm</a>
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Message was edited by:
user461713

Hi, Thank u.
Sorry, I forgot to attach a code. Here it is.
Actually i need to upload a file to a remote server and download it from a server to my machine. I'm trying it using servlets and using tomcat5.0 as a servlet container. Here i'm sening a code used to upload a file. Let me know whether it works. Only few lines are here.
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.lang.Object;
import java.util.*;
import java.lang.String;
import com.oreilly.servlet.MultipartRequest;
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try{
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fw.write(i);
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finally{
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This code is giving error as: cannot resolve symbol: class MultipartRequest
Why is this happening?
Pls let me know whether this code works or no and also i have written form.html.
Can u pls tel me whether there are ways in which i can write a code to upload a file using servlets without using third party packages. Pls help.
Also how should be the servlet mapping for this code.?
Regards
Message was edited by:
user461713

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<source code below this line>
====================START OF CODE ======================
// cm.java
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
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edit.addActionListener (this);
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// Add a quit button to the Panel object and register
// the current cm object as a listener for button events.
p.add (b = new Button ("quit"));
b.addActionListener (this);
// Add the panel object to the frame window container.
add ("South", p);
// Set the background of the frame window container to
// pink (to give a pleasing effect).
setBackground (Color.pink);
// Set the size of the frame window container to 400
// pixels horizontally by 200 pixels vertically.
setSize (400, 200);
// Do not allow the user to resize the frame window.
setResizable (false);
// Load all contacts.
loadContacts ();
// Make sure that the frame window is visible.
setVisible (true);
public void actionPerformed (ActionEvent e)
if (e.getActionCommand ().equals ("delete"))
delete ();
else
if (e.getActionCommand ().equals ("quit"))
saveContacts ();
System.exit (0);
else
if (e.getActionCommand ().equals ("add"))
add ();
else
edit ();
public Insets getInsets ()
// Return an Insets object that describes the number of
// pixels to reserve as a border around the edges of the
// frame window.
return new Insets (10, 10, 10, 10);
public static void main (String [] args)
// Create a new cm object and let it do its thing.
new cm ();
private void delete ()
// Obtain index of selected contact item from the names
// component.
int index = names.getSelectedIndex ();
// If no item was selected, index is -1. We cannot edit
// a contact if no contact item in the names component was
// selected - because we would have nothing to work with.
if (index != -1)
// Remove the contact item from the names component.
names.remove (index);
// Remove the Contact object from the contacts Vector
// object.
contacts.remove (index);
// If there are no more contacts ...
if (contacts.size () == 0)
delete.setEnabled (false);
edit.setEnabled (false);
else
// Make sure that the first contact item in the names
// list is highlighted.
names.select (0);
private void add ()
// Create an add data entry form to enter information
// for a new contact.
DataEntryForm def = new DataEntryForm (this, "add");
// If the bOk Boolean flag is set, this indicates the user
// exited the form by pressing the Ok button.
if (def.bOk)
// Create a Contact object and assign information from
// the form to its fields.
Contact temp = new Contact ();
temp.fname = new String (def.fname.getText ());
temp.lname = new String (def.lname.getText ());
temp.haddress = new String (def.haddress.getText ());
temp.maddress = new String (def.maddress.getText ());
temp.phone = new String (def.phone.getText ());
temp.wphone = new String (def.wphone.getText ());
temp.cphone = new String (def.cphone.getText ());
temp.email = new String (def.email.getText ());
temp.bdate = new String (def.bdate.getText ());
temp.comments = new String (def.comments.getText ());
// Add a new contact item to the names component.
names.add (temp.lname + ", " + temp.fname);
// Add the Contact object to the contacts Vector
// object.
contacts.add (temp);
// Make sure that the delete and edit buttons are
// enabled.
delete.setEnabled (true);
edit.setEnabled (true);
// Destroy the dialog box.
def.dispose ();
// Make sure that the first contact item in the names list
// is highlighted.
names.select (0);
// ===========================================================
// Load all contacts from contacts.dat into the contacts
// Vector object. Also, make sure that the last name/first
// name from each contact is combined into a String object and
// added into the names component - as a contact item.
// ===========================================================
private void loadContacts ()
FileInputStream fis = null;
try
fis = new FileInputStream ("contacts.dat");
DataInputStream dis = new DataInputStream (fis);
int nContacts = dis.readInt ();
for (int i = 0; i < nContacts; i++)
Contact temp = new Contact ();
temp.fname = dis.readUTF ();
temp.lname = dis.readUTF ();
temp.haddress = dis.readUTF ();
temp.maddress = dis.readUTF ();
temp.phone = dis.readUTF ();
temp.wphone = dis.readUTF ();
temp.cphone = dis.readUTF ();
temp.email = dis.readUTF ();
temp.bdate = dis.readUTF ();
temp.comments = dis.readUTF ();
names.add (temp.lname + ", " + temp.fname);
contacts.add (temp);
if (nContacts > 0)
delete.setEnabled (true);
edit.setEnabled (true);
catch (Exception e)
finally
if (fis != null)
try
fis.close ();
catch (Exception e) {}
// Make sure that the first contact item in the names list
// is highlighted.
names.select (0);
// ========================================================
// Save all Contact objects from the contacts Vector object
// to contacts.dat. The number of contacts are saved as an
// int to make it easy for loadContacts () to do its job.
// ========================================================
private void saveContacts ()
FileOutputStream fos = null;
try
fos = new FileOutputStream ("contacts.dat");
DataOutputStream dos = new DataOutputStream (fos);
dos.writeInt (contacts.size ());
for (int i = 0; i < contacts.size (); i++)
Contact temp = (Contact) contacts.elementAt (i);
dos.writeUTF (temp.fname);
dos.writeUTF (temp.lname);
dos.writeUTF (temp.haddress);
dos.writeUTF (temp.maddress);
dos.writeUTF (temp.phone);
dos.writeUTF (temp.wphone);
dos.writeUTF (temp.cphone);
dos.writeUTF (temp.email);
dos.writeUTF (temp.bdate);
dos.writeUTF (temp.comments);
catch (Exception e)
MsgBox mb = new MsgBox (this, "CM Error",
e.toString ());
mb.dispose ();
finally
if (fos != null)
try
fos.close ();
catch (Exception e) {}
private void edit ()
// Obtain index of selected contact item from the names
// component.
int index = names.getSelectedIndex ();
// If no item was selected, index is -1. We cannot edit
// a contact if no contact item in the names component was
// selected - because we would have nothing to work with.
if (index != -1)
// Obtain a reference to the Contact object (from the
// contacts Vector object) that is associated with the
// index.
Contact temp = (Contact) contacts.elementAt (index);
// Create and display an edit entry form.
DataEntryForm def = new DataEntryForm (this, "edit",
temp.fname,
temp.lname,
temp.haddress,
temp.maddress,
temp.phone,
temp.wphone,
temp.cphone,
temp.email,
temp.bdate,
temp.comments);
// If the user pressed Ok...
if (def.bOk)
// edit the contact information in the contacts
// Vector object.
temp.fname = new String (def.fname.getText ());
temp.lname = new String (def.lname.getText ());
temp.haddress = new String (def.haddress.getText ());
temp.maddress = new String (def.maddress.getText ());
temp.phone = new String (def.phone.getText ());
temp.wphone = new String (def.wphone.getText ());
temp.cphone = new String (def.cphone.getText ());
temp.email = new String (def.email.getText ());
temp.bdate = new String (def.bdate.getText ());
temp.comments = new String (def.comments.getText ());
// Make sure the screen reflects the edit.
names.replaceItem (temp.lname + ", " + temp.fname,
index);
// Destroy the dialog box.
def.dispose ();
// Make sure that the first contact item in the names
// list is highlighted.
names.select (0);
// ========================================================
// Class: Contact
// This class describes the contents of a business contact.
// ========================================================
class Contact
public String fname;
public String lname;
public String haddress;
public String maddress;
public String phone;
public String wphone;
public String cphone;
public String email;
public String bdate;
public String comments;
// ==========================================================
// Class: DataEntryForm
// This class provides a data entry form for entering contact
// information.
// ==========================================================
class DataEntryForm extends Dialog implements ActionListener
// bOk is a boolean flag. When true, it indicates that
// the Ok button was pressed to terminate the dialog box
// (as opposed to the Cancel button).
public boolean bOk;
// The following components hold the text that the user
// entered into the visible text fields.
public TextField fname;
public TextField lname;
public TextField haddress;
public TextField maddress;
public TextField phone;
public TextField wphone;
public TextField cphone;
public TextField email;
public TextField bdate;
public TextField comments;
public void actionPerformed (ActionEvent e)
// If the user pressed the Ok button, indicate this
// by assigning true to bOk.
if (e.getActionCommand ().equals ("Ok"))
bOk = true;
// Destroy the dialog box and return to the point
// just after the creation of the DataEntryForm object.
dispose ();
public DataEntryForm (Frame parent, String title)
// Call the other constructor. The current constructor
// is used for add operations. The other constructor
// is used for edit operations.
this (parent, title, "", "", "", "", "", "", "", "", "", "");
public DataEntryForm (Frame parent, String title,
String fname, String lname,
String haddress, String maddress,
String phone,String wphone,
String cphone,String email,
String bdate,String comments)
// Initialize the superclass layer.
super (parent, title, true);
// Choose a grid bag layout so that components can be more
// accurately positioned. (It looks nicer.)
setLayout (new GridBagLayout ());
// Add appropriate first name, last name, phone, wphone, and
// email components to the current DataEntryForm container.
// (Remember, DataEntryForm is a subclass of Dialog.
// Dialog is a container. Therefore, DataEntryForm
// inherits the ability to be a container.)
addComponent (this, new Label ("First Name: "),0, 0, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.fname = new TextField (20);
addComponent (this, this.fname, 1, 0, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
if (title.equals ("edit"))
this.fname.setText (fname);
addComponent (this, new Label ("Last Name: "), 0, 1, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.lname = new TextField (20);
addComponent (this, this.lname, 1, 1, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
if (title.equals ("edit"))
this.lname.setText (lname);
addComponent (this, new Label ("Home Address: "), 0, 2, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.haddress = new TextField (20);
addComponent (this, this.haddress, 1, 2, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
if (title.equals ("edit"))
this.haddress.setText (haddress);
addComponent (this, new Label ("Mailing Address: "), 0, 3, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.maddress = new TextField (20);
addComponent (this, this.maddress, 1, 3, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
if (title.equals ("edit"))
this.maddress.setText (maddress);
addComponent (this, new Label ("Home Number: "), 0, 4, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.phone = new TextField (20);
addComponent (this, this.phone, 1, 4, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
if (title.equals ("edit"))
this.phone.setText (phone);
addComponent (this, new Label ("Work Number: "), 0, 5, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.wphone = new TextField (20);
addComponent (this, this.wphone, 1, 5, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
if (title.equals ("edit"))
this.wphone.setText (wphone);
addComponent (this, new Label ("Cell Number: "), 0, 6, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.cphone = new TextField (20);
addComponent (this, this.cphone, 1, 6, 1, 1,
GridBagConstraints.WEST,
GridBagConstraints.WEST);
addComponent (this, new Label ("Email Address: "), 0, 7, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.email = new TextField (20);
addComponent (this, this.email, 1, 7, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
addComponent (this, new Label ("Birth Date: "), 0, 8, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.bdate = new TextField (20);
addComponent (this, this.bdate, 1, 8, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
addComponent (this, new Label ("Comments: "), 2, 0, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
this.comments = new TextField (20);
addComponent (this, this.comments, 2, 1, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
addComponent (this, new Label (""), 0, 9, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
addComponent (this, new Label (""), 1, 9, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.WEST);
Button b;
// Add an Ok button to this container.
addComponent (this, b = new Button ("Ok"), 0, -9, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
b.addActionListener (this);
// Add a Cancel button to this container.
addComponent (this, b = new Button ("Cancel"), 1, -9, 1, 1,
GridBagConstraints.NONE,
GridBagConstraints.CENTER);
b.addActionListener (this);
// Set the background of the frame window container to
// pink (to give a pleasing effect).
setBackground (Color.pink);
// Set the size of the dialog window to 250 pixels
// horizontally by 200 pixels vertically.
setSize (450, 500);
// Do not allow users to resize the dialog window.
setResizable (false);
// Make sure that the dialog window is visible.
setVisible (true);
private void addComponent (Container con, Component com,
int gridx, int gridy,
int gridw, int gridh, int fill,
int anchor)
// Get the current layout manager. It is assumed to
// be a GridBagLayout object.
LayoutManager lm = con.getLayout ();
// Create a GridBagConstraints object to make it
// possible to customize component positioning.
GridBagConstraints gbc = new GridBagConstraints ();
// Assign the x and y grid positions.
gbc.gridx = gridx;
gbc.gridy = gridy;
// Assign the number of grid blocks horizontally and
// vertically that are occupied by the component.
gbc.gridwidth = gridw;
gbc.gridheight = gridh;
// Specify the component's resize policy (fill) and
// the direction in which the component is positioned
// when its size is smaller than available space (anchor).
gbc.fill = fill;
gbc.anchor = anchor;
// Set the new constraints that the grid bag layout
// manager will use.
((GridBagLayout) lm).setConstraints (com, gbc);
// Add the component to the container.
con.add (com);
// ===========================================================
// Class: MsgBox
// This class displays a message box to the user. The message
// is usually an error message. The user must press the Ok
// button to terminate the message box.
// ===========================================================
class MsgBox extends Dialog implements ActionListener
public void actionPerformed (ActionEvent e)
// Terminate the dialog box in response to the user
// pressing the Ok button.
dispose ();
public MsgBox (Frame parent, String title, String msg)
// Initialize the superclass layer.
super (parent, title, true);
// Store the msg argument in a Label object and add
// this object to the center part of the dialog window.
Label l = new Label (msg);
add ("Center", l);
// Create a Button object and add it to the south part
// of the dialog window.
Button b = new Button ("Ok");
add ("South", b);
// Make the current object a listener to events that
// occur as a result of the user pressing the Ok
// button.
b.addActionListener (this);
// Make sure that the Ok button has the focus.
b.requestFocus ();
// Do not allow users to resize the dialog window.
setResizable (false);
// Allow the layout manager to choose an appropriate
// size for the dialog window.
pack ();
// Make sure that the dialog window is visible.
setVisible (true);
====================END OF CODE =======================

You should first start by formatting the code before
posting. I lost my interest as I browsed thorugh the
code.
Read here -
http://forum.java.sun.com/help.jspa?sec=formatting
...and its way too much code to expect anyone to read. Post a short excerpt of the part you are having trouble with.

Accessing Webdynpro Java iview functionality for print from webdynpro code

I know.. you would love to post me with n different blogs and forums discussion about how to print from webdynpro java application.
But lets read before what i am looking for..
There is standard "Print" function available on webdynpro for java iview.. and layout and all its just fine for us. though we want to trigger this event from a screen button. as going to iview properties is very user friendly.
I was looking for some iview api which can help me.. We are on NW 7.01 SP6 at the moment. And this is for standard ESS applications.
Thanks a lot for your inputs.
Regards,
Sudhir

Hi
You can write Java program for printing. Call the java class from screen (button or Url). Also you can write the content to XMl file.open the xml file in action. so that u will get print preview and print option.

Sample code - webdynpro java Handheld.

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