Dynamic create class

hi,
I want to create a class dynamic and using it in a program. How this can be done ?
Thanks
Wilson

Well, you can do it . . .
1) Create your source code and save it in a file.
2) Use Runtime.exec() to call javac, for compiling it
3) Use ClassLoader.defineClass() or Class.forName() to load the class
Raghu

Similar Messages

How can I create classes dynamically?

Guys
My requirment is I want to create classes and their instancess too dynamically. First is it possible in Java?
If so, then my next question is how can I refer such dynamically created classes in my code to avoid compilation error.
Thanks in advance
Regards
Sunil

For other ways to generate classes on runtime you could also have a look at BCEL:
http://jakarta.apache.org/bcel
And dynamic proxies:
http://java.sun.com/j2se/1.4.2/docs/guide/reflection/proxy.html
If so, then my next question is how can I refer such
dynamically created classes in my code to avoid compilation
error.Generally the classes that you load should either implement some interface or extend some abstract class you know of at compile time so that the compiler knows what methods are available for use. If that's not possible you can only use reflection.

Dynamically Create and Compile Java Classes

Hi,
I have a requirement to dynamically create and compile Java classes and would like some advice on the best method to do so.
Basically the project I am working on involves creating "Factors". Factors are items that have both attributes and weights so for example Factor A could have attribute B with weight 0.76, and attribute C with weight 1.33. There are a number of methods common to all factors such as calculateTotal, identify etc etc.
At the moment the application has 5 factors, but there is a requirement to dynamically add and remove factors on the fly.
I current solution I have been considering is using XML to describe the new class, build up the class and compile it; something along the lines of what is descibed at
http://www.javaworld.com/javaworld/jw-02-2002/jw-0201-xslt_p.html
however i would like to consider all options.
Any help with this is greatly appreciated.

You want to dynamically create and compile Java classes.
I would try the following:
(1) Write the Source code of the new class into a text file with the name MyNewClass.java
(2) compile this new .java-file with Runtime r = getRuntime();
try {
r.exec ("javac MyNewClass.java");
} catch (IOException e) {
System.out.println("ooops " + e.getMessage());
} (3) somehow try to load that new class, maybe using ClassLoader cl = ClassLoader.getSystemClassLoader();
cl.loadClass("MyNewClass");

How to set a value to a dynamically created node/attribute?

Hi,
I dynamically created attributes using the following method,
IWDNodeInfo cbOptions = wdContext.getNodeInfo().addChild("cbOpt"+count, null, true, true, false, false, false, true, null, null, null);
cbOptions.addAttribute("opt"+critEle.getQuest_Critid(), "ddic:com.sap.dictionary.string");
How do i assign a value to it now, since the node/attribute cannot be accessed via wdcontext?
On a side note, it seems really troublesome if i need to use a checkbox grp(s) dynamically. I actually need to dynamically create a seperate node + attribute for each checkbox grp i have. Is there any better way to do this?
Thanx in advance

Hi
Steps:
1) Create the action click is done statically (you cannot create action dyanmically)
2) binding the action click to checkbox dynamically
code
public static void wdDoModifyView(IPrivateDynamicProgrammingView wdThis, IPrivateDynamicProgrammingView.IContextNode wdContext, com.sap.tc.webdynpro.progmodel.api.IWDView view, boolean firstTime)
    //@@begin wdDoModifyView
     if(firstTime){
                  IWDTransparentContainer con=(IWDTransparentContainer)view.getElement("RootUIElementContainer");
          IWDCheckBox checkBox=(IWDCheckBox)view.createElement(IWDCheckBox.class,"ck");
          IWDAction act=wdThis.wdCreateAction(IPrivateDynamicProgrammingView.WDActionEventHandler.CLICK,"");
          checkBox.setOnToggle(act);
          con.addChild(checkBox);
    //@@end
Thanks and Regards,
Arun

How to set the cardinality property as 1..n for a dynamically created node

Hi...everybody
    I am creating Dropdown by index UI element and the
context atrributes dynamically.To bind multiple data to a dropdown
the cardinality property of the node should be 0..n or 1..n,
But i could not set the property of the dynamically created context node to 0..n ...
can any body suggest me..
I implemented the following code in WDDoModify View
IWDTransparentContainer tc=(IWDTransparentContainer)view.getElement("RootUIElementContainer");
IWDNodeInfo node = wdContext.getNodeInfo().addChild("DynamicNode",null,true,true,false,false,false,true,null,
          null,null);
IWDAttributeInfo strinfo=node.addAttribute("Value","ddic:com.sap.dictionary.string");
dbyindex.bindTexts(strinfo);
tc.addChild(dbyindex);
I could successfully display one value in the drop down,by adding the following code before the line tc.addchild(dbyindex);
IWDNode node1=wdContext.getChildNode("DynamicNode",0);
IWDNodeElement nodeElement=node1.createElement();
nodeElement.setAttributeValue("Value","Hello");
node1.addElement(nodeElement);
but when
i am trying to bind multiple values i am getting Exception ,,,,

hi
you are getting the exception because of cardinality property.
i.e   true,false and
you are trying to add morethan one element.
so,if you want to add morethan one than one element you have to set the cardinality property to true,true (or) false,true.
In your code do the following modification for changing the cardinality.
For 0..n -->false,true
      1..n-->true,true
IWDTransparentContainer tc=(IWDTransparentContainer)view.getElement("RootUIElementContainer");
IWDNodeInfo node = wdContext.getNodeInfo().addChild("DynamicNode",null,true,true,false,false,false,true,null,
null,null);
IWDAttributeInfo strinfo=node.addAttribute("Value","ddic:com.sap.dictionary.string");
dbyindex.bindTexts(strinfo);
tc.addChild(dbyindex);
hope this will solve your problem.
In addchild(..) the parameters are
addChild("Name ,
                Element class for model node ,
                Is singleton? ,
                Cardinality ,
                Selection cardinality ,
                Initialise lead selection? ,
                Datatype ,
                Supplier function ,
                 Disposer function);
Regards
sowmya

How get context value form a dynamic created node

Hi all,
I have build my own dynamic view. In this view I use also a dynamic created Node. When I have more rows in my Node I see every row with context of the last row of the dynamic Node.
this is the source I use.
for (int x = 0; x < dynTabNode.size(); x++)
dynTabNode.setLeadSelection(x);
IWDGroup group = (IWDGroup)view.getElement("Group_name");
IWDAttributeInfo aiName = wdContext.getChildNode("DayNode", IWDNode.LEAD_SELECTION).getNodeInfo().getAttribute("Name");
IWDCaption name = (IWDCaption) view.createElement(IWDCaption.class, null);
name.bindText(aiName);
group.addChild(name);
for (int i = 8; i < 18; i++)
    int teller = i * 100;
    IWDGroup group1 = (IWDGroup)view.getElement("hour" + teller);
    for (int z = 0; z < 12; z++)
      IWDImage image = (IWDImage) view.createElement(IWDImage.class, "Image" + teller + "_" + x);
      image.setWidth("10");
      image.setHeight("24px");
      image.setBorder(0);
      IWDAttributeInfo att = dynTabNode.getNodeInfo().getAttribute("hour" + teller);
      image.bindSource(att);
      group1.addChild(image);
      teller = teller + 5;
How can I read my Node row for row?
Richard
Edited by: Armin Reichert on Jul 28, 2008 5:03 PM

The reason is that all these Caption UI elements are bound against the same context attribute. At runtime this will be resolved to the attribute value of the lead-selected node element. In this example you can fix this by not binding the "text" property but setting it to the attribute value of the iterated node element:
for (int x = 0; x < dynTabNode.size(); x++)
dynTabNode.setLeadSelection(x);
IWDGroup group = (IWDGroup)view.getElement("Group_name");
IWDCaption name = (IWDCaption) view.createElement(IWDCaption.class, null);
IWDNode dayNode = wdContext.getChildNode("DayNode", IWDNode.LEAD_SELECTION);
String text = (String) dayNode.getElementAt(x).getAttributeValue("Name");
name.setText(text);
IWDAttributeInfo aiName = dayNode.getNodeInfo().getAttribute("Name");
name.bindText(aiName);
group.addChild(name);
(I assume here that the node "DayNode" has the same size as dynTabNode. No idea if this assumption is correct)
But this would not help for editable elements where you need to bind the edited property.
Armin

How to add a table (dynamic created) into a model attribute

i have dynamically created an internal table. Generally i use model-binding in a stateful MVC-Application.
Is there a possibiltity to transfer the dynamic table to a model. As far as i know generic attributes are not allowed in the modell class.
Every hint welcome
thx in advance

By some miracle I do have this finally working. I will warn you up front that the code is not the cleanest (I have stuff copied in from all over the place. I probably have lots of unused variable references - but I am running out of time to clean it up further). Also I don't have all the logic to support all your different possible dynamic structure types. I always use SFLIGHT as my dyanmic structure. Therefore you will have to adapt the coding to lookup the actual structure type in use.
So I have a model that has an structure ITAB type ref to data. In my Model initialization I go ahead and dynamically redfine this to my specific type:
METHOD init.
SELECT SINGLE * FROM sflight INTO CORRESPONDING FIELDS OF isflight.
DATA: struct_type TYPE REF TO cl_abap_structdescr,
    tabletype TYPE REF TO cl_abap_tabledescr.
struct_type ?= cl_abap_structdescr=>describe_by_name( 'SFLIGHT' ).
CREATE DATA me->itab TYPE HANDLE struct_type.
ENDMETHOD.
Then in my View I have the following:
<%@page language="abap" %>
<%@extension name="htmlb" prefix="htmlb" %>
<%@extension name="phtmlb" prefix="phtmlb" %>
<%@extension name="bsp" prefix="bsp" %>
<htmlb:content design="design2003" >
<htmlb:page title=" " >
    <htmlb:form>
      <phtmlb:matrix width="100%" >
        <%
field-symbols: <wa> type any.
assign model->itab->* to <wa>.
* append initial line to <wa_itab> assigning <Wa>.
data: descriptor type ref to CL_ABAP_STRUCTDESCR.
descriptor ?= CL_ABAP_STRUCTDESCR=>describe_by_data( <wa> ).
data: flddescr type DDFIELDS.
flddescr = descriptor->GET_DDIC_FIELD_LIST( ).
field-symbols: <wa_field> like line of flddescr.
data: label type ref to cl_htmlb_label.
data: input type ref to CL_HTMLB_INPUTFIELD.
data: binding_string type string.
"Loop through each field in the structure Definition
loop at flddescr assigning <Wa_field>.
clear label.
clear input.
concatenate '//model/itab.'
<wa_field>-FIELDNAME
into binding_string.
label ?= cl_htmlb_label=>factory( _for = binding_string ).
input ?= cl_htmlb_inputfield=>factory( _value = binding_string ).
        %>
        <phtmlb:matrixCell row    = "+1"
                           vAlign = "TOP" />
        <bsp:bee bee="<%= label %>" />
        <phtmlb:matrixCell col    = "+1"
                           vAlign = "TOP" />
        <bsp:bee bee="<%= input %>" />
        <%
endloop.
        %>
      </phtmlb:matrix>
     <htmlb:button id="Test" onClick="Test" text="Submit"/>
    </htmlb:form>
</htmlb:page>
The key to making this work are custom getter/setters. In your model class, you can copy from the template methods (Like GETM_S_XYZ for the metadata structure method). Copy them and remove the _ on the front of the name. Then change XYZ to the name of the attribute you are binding for. The following are my custom methods.
method get_m_s_itab .
* uses ****************************************************************
* data ****************************************************************
* code ****************************************************************
* method is supposed to return either info about a specific component
* of a structure (component is not initial -> return ref to
* if_bsp_metadata_simple) or the complete structure
* (component is initial -> return ref to if_bsp_metadata_struct)
data: l_attribute_ref type ref to data,
           l_attr_ref type ref to data,
           l_exception     type ref to cx_root,
           l_ex            type ref to cx_sy_conversion_error,
           l_ex_bsp        type ref to cx_bsp_conversion_exception,
           l_ex2           type ref to cx_bsp_t100_exception,
           l_type          type i,
           l_index         type i,
           l_name          type string,
           l_component     type string,
           l_getter        type string.
data: l_field_ref     type ref to data,
        l_dfies_wa      type dfies,
        rtti            type ref to cl_abap_elemdescr.
data: crap type string,
          rest type string,
          t_index(10) type c.
split attribute_path at '[' into crap rest.
split rest           at ']' into t_index crap.
****Dummy Object to avoid dumps
create object metadata type cl_bsp_metadata_simple
    exporting info = l_dfies_wa.
call method if_bsp_model_util~disassemble_path
    exporting
      path      = attribute_path
    importing
      name      = l_name
      index     = l_index
      component = l_component
      type      = l_type.
data: l_dataref type string.
****Dynamically determine your actual structure - for this demo
****I just hardcode SFLIGHT
concatenate 'SFLIGHT-' l_component into l_dataref.
data: field type ref to data.
****Create a data object of the specified type
try.
      create data field type (l_dataref).
    catch cx_sy_create_data_error.
      exit.
endtry.
rtti ?= cl_abap_typedescr=>describe_by_data_ref( field ).
l_dfies_wa = rtti->get_ddic_field( ).
clear metadata.
create object metadata type cl_bsp_metadata_simple
    exporting info = l_dfies_wa.
endmethod.
method get_s_itab .
* uses ****************************************************************
* data ****************************************************************
* code ****************************************************************
* get the given value of the component of the struct, e.g.
* field-symbols: <l_comp> type any.
* assign component component of structure XYZ to <l_comp>.
* value = <l_comp>.
data: l_attr_ref type ref to data,
          l_field_ref type ref to data.
data: l_attribute_ref type ref to data,
        l_exception     type ref to cx_root,
        l_ex            type ref to cx_sy_conversion_error,
        l_ex2           type ref to cx_bsp_t100_exception,
        l_type          type i,
        l_index         type i,
        l_name          type string,
        l_component     type string,
        l_getter        type string,
        rtti            type ref to cl_abap_elemdescr.
field-symbols: <o_data> type any,
                 <n_data> type any.
*Test
call method if_bsp_model_util~disassemble_path
    exporting
      path      = attribute_path
    importing
      name      = l_name
      index     = l_index
      component = l_component
      type      = l_type.
* get a field reference for the assignment
field-symbols: <wa> type any,
                 <l_comp> type any.
assign me->itab->* to <wa>.
assign component l_component of structure <wa> to <l_comp>.
get reference of <l_comp> into l_field_ref.
****Dynamically determine your actual structure - for this demo
****I just hardcode SFLIGHT
data: l_dataref type string.
concatenate 'SFLIGHT-' l_component into l_dataref.
data: field type ref to data.
****Create a data object of the specified type
try.
      create data field type (l_dataref).
    catch cx_sy_create_data_error.
      exit.
endtry.
assign l_field_ref->* to <o_data>.
assign field->*       to <n_data>.
move <o_data> to <n_data>.
* call conversion routine
try.
      value = if_bsp_model_util~convert_to_string(
        data_ref           = field
        attribute_path     = attribute_path
        no_conversion_exit = 0 ).
    catch cx_sy_conversion_error into l_ex.
      me->errors->add_message_from_exception(
          condition = attribute_path
          exception = l_ex
          dummy     = value ).
    catch cx_bsp_t100_exception into l_ex2.
      me->errors->add_message_from_t100(
        condition = attribute_path
        msgid     = l_ex2->msgid
        msgno     = l_ex2->msgno
        msgty     = l_ex2->msgty
        p1        = l_ex2->msgv1
        p2        = l_ex2->msgv2
        p3        = l_ex2->msgv3
        p4        = l_ex2->msgv4
        dummy     = value ).
endtry.
endmethod.
method set_s_itab .
* uses ****************************************************************
* data ****************************************************************
* code ****************************************************************
* assign the given value to the component of the struct, e.g.
* field-symbols: <l_comp> type any.
* assign component component of structure XYZ to <l_comp>.
* <l_comp> = value.
data: l_attr_ref type ref to data,
           l_field_ref type ref to data.
data: l_attribute_ref type ref to data,
        l_exception     type ref to cx_root,
        l_ex            type ref to cx_sy_conversion_error,
        l_ex_bsp        type ref to cx_bsp_conversion_exception,
        l_ex2           type ref to cx_bsp_t100_exception,
        l_type          type i,
        l_index         type i,
        l_name          type string,
        l_component     type string,
        l_getter        type string,
        rtti            type ref to cl_abap_elemdescr.
field-symbols: <o_data> type any,
                 <n_data> type any.
*Test
call method if_bsp_model_util~disassemble_path
    exporting
      path      = attribute_path
    importing
      name      = l_name
      index     = l_index
      component = l_component
      type      = l_type.
* get a field reference for the assignment
field-symbols: <wa> type any,
                 <l_comp> type any.
assign me->itab->* to <wa>.
assign component l_component of structure <wa> to <l_comp>.
get reference of <l_comp> into l_field_ref.
****Dynamically determine your actual structure - for this demo
****I just hardcode SFLIGHT
data: l_dataref type string.
concatenate 'SFLIGHT-' l_component into l_dataref.
data: field type ref to data.
****Create a data object of the specified type
try.
      create data field type (l_dataref).
    catch cx_sy_create_data_error.
      exit.
endtry.
assign field->*       to <n_data>.
move <l_comp> to <n_data>.
* call conversion routine
try.
      if_bsp_model_util~convert_from_string(
                           data_ref           = field
                           value              = value
                           attribute_path     = attribute_path
                           use_bsp_exceptions = abap_true
                           no_conversion_exit = 0 ).
    catch cx_sy_conversion_error into l_ex.
      me->errors->add_message_from_exception(
          condition = attribute_path
          exception = l_ex
          dummy     = value ).
    catch cx_bsp_conversion_exception into l_ex_bsp.
      me->errors->add_message_from_exception(
          condition = attribute_path
          exception = l_ex_bsp
          dummy     = value ).
    catch cx_bsp_t100_exception into l_ex2.
      me->errors->add_message_from_t100(
        condition = attribute_path
        msgid     = l_ex2->msgid
        msgno     = l_ex2->msgno
        msgty     = l_ex2->msgty
        p1        = l_ex2->msgv1
        p2        = l_ex2->msgv2
        p3        = l_ex2->msgv3
        p4        = l_ex2->msgv4
        dummy     = value ).
endtry.
if <n_data> is initial.
    clear <l_comp>.
else.
    move <n_data> to <l_comp>.
endif.
endmethod.
I know that is a LOT of nasty code without too much explanation. I'm afriad there isn't time right now to expand on how it works too much. Between my day job and trying to finish the BSP book, there just isn't much time left. Like I said before there is a very large section in the book on this topic that hopefully explains it. The book will be out in December or early January - but perhaps I will get some time before then to write up something on SDN about this.

How to access a dynamic created attribute in a context node?

<i>Hello,</i>
<i>who could help? I can't set a value for a dynamically created attribute which is bind to a table.</i>
<i>My context of the view looks as follow (is defined in NetWeaver):</i>
- Context
     - Availability (Node)
         - vctxService (Attribute)
         - vctxServiceDesc (Attribute)
         - ... (further predefined attributes)
         - ... (some have to be set dynamically as follows)
<i>Then I have added attributes dynamically in the wdDoModifyView(...) - method, as follows:</i>
for (int i = 0; i < max; i++) {
   // some code to dynamically create table columns
   // adding attributes dynamically
   IWDAttributeInfo attrInfo =       wdContext.nodeAvailability().getNodeInfo().      addAttribute("vctxAvailability_" + i, "ddic:com.sap.dictionary.string");
   tv.bindText(attrInfo); // bind to TextView in table
<i>In the method onPlugFrom... I tried to set the values for the attributes "vctxAvailability_ + i" as follows:</i>
for (int i = 0; i < max; i++) {
   IAvailabilityElement newAvailNodeElement =     wdContext.createAvailabilityElement();
   // some values will be set for the
   // predefined attributes of AvailabilityNode
   // newAvailNodeElement.set...( value );
   // newAvailNodeElement.setVctxService( xy.getServ() );
   // now the values of dynamically created and added
   // attributes in AvailabilityNode will be added
   // THIS DOESN'T WORK
   newAvailNodeElement.setAttributeValue    ("vctxAvailability_" + i, "value" + i);
<i>It would be great if someone could help me.
Thanks in advance.
Kind regards,
Carsten</i>

Carsten,
Here is a sample code that creates context attributes dynamically and also sets values:
//Creates a node
IWDNodeInfo nodeInfo = wdContext.wdGetAPI().getRootNodeInfo().addChild("TestNode", null, true, true, false, true, false, true, null, null, null);
//If you want to bind the node to a model node then the
//second argument to the above method should be the
//model class.
//Creates an attribute under the node just created.
IWDAttributeInfo testAttrib = wdContext.wdGetAPI().getRootNodeInfo().getChild("TestNode").addAttribute("testAttrib", "ddic:com.sap.dictionary.string");
IWDNodeElement testNode = wdContext.getChildNode("TestNode", IWDNode.LEAD_SELECTION).getCurrentElement();
IWDNode testNode2 = wdContext.getChildNode("TestNode", IWDNode.LEAD_SELECTION);
//Now you can bind testNode with the Model Node
//You can also set a value to the newly created attribute
testNode.setAttributeValue("testAttrib", new String("Value"));
Hope this helps.
Shakeel

Help needed when dynamically creating new stage sprites

Morning folks,
I'm feeling very rusty when asking this question! It feels
like I should
know the answer but simply unable to comprehend where I'm
going wrong at the
moment!!
I'm in the process of creating a Director piece that involves
the user
having to drag "shapes" onto a pre-defined grid [drag and
drop style] --
there are currently three different types of shape that can
be dragged of
which many of the shapes can be of the same type. So I need
to display the
three shape types on one side of the screen and allow the
user to drag and
drop as many as they wish to the girded area.
I've written the drag and drop routine but now having
difficulty in
producing the dynamic creation of a new draggable shape; so
far I've managed
to create a new "shape" sprite from my cast library and
placed it in the
correct location. Then I create and add a new instance of my
"Drag and Drop"
behaviour onto the newly created sprite, but this is where it
goes wrong --
although I can drag the dynamically created sprite, once
dropped Director
complains of not knowing what its local properties are, for
example I'm
unable to reference the locH and locV of the newly created
sprite!
I'm really at a loss on this one and would appreciate any
kind of guidance!
Many thanks in advance, Mark ;-)

Hi Saravanan,
>>>><b>First column - Welcome message , below Date , time and place</b>
It is possible to add date, time and location in the welcome area. Jus add a table to the <td> of the welcome area container. Like this.
<% Date d= new Date(); %>
<TD nowrap class="prtlHdrWelcome" ti="0" tabIndex="0" id="welcome_message"><%=StringUtils.escapeToHTML(GetWelcomeMsg(componentRequest, welcomeClauseStr))%><table width="100"><tr><td nowrap><%=d%></td><td>INDIA</td></tr></table></TD>
Hope it helps.
Regards,
Saravanan
P.S: Hope you remember the thread
<a href="http://">https://www.sdn.sap.com/irj/sdn/thread?threadID=152135&messageID=1703666</a>

5.1 SP10 How do you programmatically make a datasource from a dynamically created Pool?

How do you programmatically make a data source from a dynamically created Pool?
I can make the Pool OK but can not find any classes the return a datasource
given a JDBC Pool.
Thanks in advance

Hi John,
weblogic 5.1 doesn't have API allowing dynamic creation
of datasources. 6.1 does.
Regards,
Slava Imeshev
How do you programmatically make a data source from a dynamically createdPool?
>
I can make the Pool OK but can not find any classes the return adatasource
given a JDBC Pool.
Thanks in advance

Futureproof and dynamically created button

I have been looking solution how to make buttons dynamically so that I can fetch dynamically values for buttons:
- value,onclick,class,type,request
This excellent page has very closely what I am looking: http://www.laureston.ca/2012/04/20/simple-workflow-implementation-in-apex/
but I have challenges getting the escaped special characters to work especially for the apex.submit - part.
Maybe that is just because 'copy-pasting' the plsql-region code from www-page didn't work out of the box
Application Express 4.2.3.00.08
Because dealing with the escape chars make the page easily break and there are now the new dynamic actions, I need to check what would be futureproof way of dynamically creating the buttons.
If this is anyway the most practical way to proceed, then where I should look for further information about htp.p(....) button creation examples with rich escapes?
Made small test page, where you can see one of my trials trying to get the escapes right.
user test
pass test
http://apex.oracle.com/pls/apex/f?p=1403:2
rgrds paavo
--below the code for dynamic plsql region -- very likely the escape chars are not copypasted and shown correctly:
DECLARE
--PL/SQL Dynamic Region
--thisworks too??
v_showme varchar2(3000);
BEGIN
for c in (select sysdate||'asdasd;asdasas' as button_label
            , 'PIMREQUEST' as button_request
            , 'button-gray' as button_class
            , 'button'      as button_type
            , 'P38_XPIMPOM' as button_setme
            , 'JUUSTOA'     as button_setme_value
            from dual) loop
htp.p('<button value='''||c.button_label||''' onclick=\"apex.submit('''||c.button_request||''');'' class='''||c.button_class||''' type='''||c.button_type||'''>
<span>'||c.button_label||'</span>
</button>');
end loop;
END;

Hi Paavo,
Your right about the button_id. It's value comes from an input parameter. The button won't show up in the "When button pressed"-list_of_values. This is not only because you write the id yourself, but more because the entire button is created on the fly. The button isn't stored internal in an apex table, that's why it won't show up in a list of values.
If you want to trigger a dynamic action with the button, you can use a jQuery selector as triggering element. Here you can refer to the button_id using the '#' as jQuery marker for ID, e.g. '#myButton'.
What the button that you render does, depends on what you put in the p_link parameter. A normal save button would submit the page with condition 'SAVE', you can do that by setting p_link to 'apex.submit("SAVE")'. If the button should do a page redirect, you set p_link to 'http://www.page2go.com', or whatever url you wish to redirect to.
The text you put in the button attributes is added as HTML element definition, so if you set p_attrs to 'alt="alternate text"', that will be added to the html of your button.
An example for a conditional button call could be:
      if p_order_id is null
      then
        create_button
          ( p_id        => 'newOrder'
          , p_link    => 'javascript:apex.submit("CREATE"');'
          , p_label     => 'New Order'
          , p_css       => 'customButton'
      else
        create_button
          ( p_id        => 'updateOrder'
          , p_link    => 'javascript:apex.submit("SAVE"');'
          , p_label     => 'Update Order'
          , p_css       => 'customButton'
      end if;
This would create a 'CREATE' button for a new order (p_order_id is null), or a 'SAVE' button for an existing order.
Regarding your ps: if you mean can you conditionaly create a button using dynamic actions? Then the answer would be yes. Yes you can use the create_button procedure in a dynamic action, however by writing it as stored procedure in the database, or in a database package, you can easily reuse your code and still have only one version of your procedure that you need to maintain.
Regards,
Vincent
http://vincentdeelen.blogspot.com

Dynamically created COLLAPSIBLE PANELS

In case this might help others, I thought I would share how I
dynamically create Collapsible Panels using MySQL, PHP, and SPRY.
Please note that I am not a master PHP coder and so there might be
a more efficient method but this does work great for me. Here is my
scenario. I have a MySQL table which holds a list of user
applications. Some applications then have individual modules which
are stored in a seperate table and related to applications by
app_id. I want to display the list of applications and then for
applications that have modules I create a collapsible panel to
display the modules.
My Applications:
mysql_select_db($database_ppg_conn, $ppg_conn);
$query_applications = "SELECT * FROM applications ORDER BY
active desc, name ASC";
$applications = mysql_query($query_applications, $ppg_conn)
or die(mysql_error());
$row_applications = mysql_fetch_assoc($applications);
$totalRows_applications = mysql_num_rows($applications);
code for application lists and collapsible panels:
<div id="maincontainerbox" align="center">
<div class="ppgaccounthdr">
PPG Applications
</div>
<div class="ppgaccountrow_active">
<a href="ppgaccounts_update.php?app=new">Add New
Application</a>
</div>
<?php
$icount = 0;
do { ?>
<?php switch ($row_applications['modules']) {
case "Y":
$modules = 1; //flags the building of collapsible panel to
display available modules for current application.
++$icount; //tracks # of applications that have modules.
This is used to properly create multiple collapsible panels.
break;
default:
$modules = 0; //no modules for current app
break;
} ?>
<?php switch ($row_applications['active']) {
case "Y":
if ($modules == 1) {
echo '<div id="CollapsiblePanel'.$icount.'"
class="ppgaccountrow_active1"><div
class="ppgaccountrow_active">';
} else {
echo '<div class="ppgaccountrow_active">'; }
break;
default:
echo '<div class="ppgaccountrow_notactive">';
break;
?>
<a href="ppgaccounts_update.php?app=<?php echo
$row_applications['id'];?>"><?php echo
$row_applications['name']; ?></a>
<?php if ($modules == 1) {
echo '</div>';
echo '<div class="CollapsiblePanelContent">';
$query_appmodules = "SELECT *
FROM app_modules
WHERE app_id = {$row_applications['id']}
ORDER BY active desc, name ASC";
$appmodules = mysql_query($query_appmodules, $ppg_conn) or
die(mysql_error());
$row_appmodules = mysql_fetch_assoc($appmodules);
$totalRows_appmodules = mysql_num_rows($appmodules);
echo '<div class="appmodulerow_active">';
echo '<a
href="ppg_app_modules_update.php?id=new&app_id='.$row_applications['id'].'">Add
New Module</a>';
echo '</div>';
do {
switch ($row_appmodules['active']) {
case "Y":
echo '<div class="appmodulerow_active">';
break;
default:
echo '<div class="appmodulerow_notactive">';
break;
echo '<a
href="ppg_app_modules_update.php?id='.$row_appmodules['id'].'"
title="Update Application
Module">'.$row_appmodules['name'].'</a></div>';
} while ($row_appmodules = mysql_fetch_assoc($appmodules));
mysql_free_result($appmodules);
echo '</div>';//close content div for collapsible
panal
} ?>
</div>
<?php } while ($row_applications =
mysql_fetch_assoc($applications)); ?>
</div>
So when my application record has a flag saying that it
possesses modules I increment $icount and then use
echo '<div id="CollapsiblePanel'.$icount.'"
class="ppgaccountrow_active1"> to build the collapsible
panel. Notice the $icount in the div id. Now at the bottom of the
HTML I do the following.
<?php
$i = 0;
do {
++$i;
echo 'var CollapsiblePanel'.$i.' = new
Spry.Widget.CollapsiblePanel("CollapsiblePanel'.$i.'",{contentIsOpen:false});';
} while ($i <= $icount);
?>
//-->
</script>
This creates a collapsiblepanel for each application which
has modules.
I hope I have described this ok and that it might help
somebody out. If you have suggestions on how to do it better then
please do let me know.
Thanks,
Lee Goolsby

Nice. Thanks for posting this, Lee.

Dynamically create a SelectOneMenu

Hi All,
I have a JSF page on which I need to dynamically create and bind a SelectOneMenu. In order to do this I have the following code (all in a request-scoped bean used by the JSF page):
List<SelectItem> values;
// Called after a button is clicked on the page
public void createMenu() {
    values = new Vector<SelectItem>();
    // Load the values to be displayed
    HtmlSelectOneMenu menu = new HtmlSelectOneMenu();
    menu.add(items);
    UISelectItems items = new UISelectItems();
    ValueExpression expr = // Get ValueExpression pointing to this request-scoped bean's 'values' attribute
    items.setValue("value", expr);
    // Create the SelectOneMenu inside a binded panel on the screen
    getCustomPanel().getChildren().add(menu);
public List<SelectItem> getValues() {
    return values;
}This works fine and the SelectOneMenu is displayed correctly and contains the correct values. However, as soon as I perform any type of postback (navigation, clicking on buttons/links on the page), I receive the following exception:
[#|2008-03-07T11:57:24.296+0200|SEVERE|sun-appserver9.1|javax.enterprise.system.container.web|_ThreadID=21;_ThreadName=httpSSLWorkerThread-8080-0;_RequestID=bcebfe92-27ee-416d-a3d5-7916f5480fe4;|StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
java.lang.IllegalArgumentException
     at javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:166)
     at javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:49)
     at javax.faces.component.UISelectOne.matchValue(UISelectOne.java:164)
     at javax.faces.component.UISelectOne.validateValue(UISelectOne.java:137)
     at javax.faces.component.UIInput.validate(UIInput.java:867)
     at javax.faces.component.UIInput.executeValidate(UIInput.java:1065)
     at javax.faces.component.UIInput.processValidators(UIInput.java:666)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1033)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1033)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1033)
     at javax.faces.component.UIForm.processValidators(UIForm.java:229)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1033)
     at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:662)
     at org.ajax4jsf.component.AjaxViewRoot.access$201(AjaxViewRoot.java:57)
     at org.ajax4jsf.component.AjaxViewRoot$3.invokeRoot(AjaxViewRoot.java:319)
     at org.ajax4jsf.context.JsfOneOneInvoker.invokeOnRegionOrRoot(JsfOneOneInvoker.java:56)
     at org.ajax4jsf.context.AjaxContextImpl.invokeOnRegionOrRoot(AjaxContextImpl.java:170)
     at org.ajax4jsf.component.AjaxViewRoot.processValidators(AjaxViewRoot.java:333)
     at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:100)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)
     at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
     at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
     at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
     at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
     at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
     at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
     at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
     at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
     at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
     at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
     at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
|#]I tried adding breakpoints to all my getters and setters and the constructor of the request-scoped bean, and as they are never triggered I assume this exception occurs before my code is actually accessed. As far as I can tell, for some reason, on creating a postback the value binding of the UISelectItems component is null and as such it can't find the SelectItems it needs. I don't know why this is or how to fix it, though. This doesn't happen if the component isn't created dynamically, and unfortunately our business requirements are as such that I have to create it dynamically.
Your help would be much appreciated as this really got me stumped and I really need this functionality to be in the project.
Thank you,
Ristretto

Okay ... here's a small proof of concept I created:
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<html>
    <body>
        <f:view>
            <h:form>
                <h:panelGrid>
                 <h:commandButton value="Load SelectOneMenu" action="#{pageBean.loadMenu}" />
              <h:commandButton value="Create Postback" action="#{pageBean.doNothing}" />
          </h:panelGrid>
          <h:panelGrid binding="#{pageBean.panel}" />
         </h:form>
        </f:view>
    </body>
</html>
public class PageBean {
    private HtmlPanelGrid panel;
    private List<SelectItem> selectItems;
    public HtmlPanelGrid getPanel() {
        return panel;
    public void setPanel(HtmlPanelGrid panel) {
        this.panel = panel;
    public List<SelectItem> getSelectItems() {
        return selectItems;
    public void setSelectItems(List<SelectItem> selectItems) {
        this.selectItems = selectItems;
    public void loadMenu() {
        selectItems = new Vector<SelectItem>();
        SelectItem selectItem1 = new SelectItem("first", "First Option");
        SelectItem selectItem2 = new SelectItem("second", "Second Option");
        selectItems.add(selectItem1);
        selectItems.add(selectItem2);
        HtmlSelectOneMenu menu = new HtmlSelectOneMenu();
        UISelectItems items = new UISelectItems();
        ValueExpression expr = getValueExpression("#{pageBean.selectItems}");
        items.setValueExpression("value", expr);
        menu.getChildren().add(items);
        panel.getChildren().add(menu);
    public void doNothing() {
    private ValueExpression getValueExpression(String expression) {
        ExpressionFactory expressionFactory = FacesContext.getCurrentInstance().getApplication().getExpressionFactory();
        ELContext expressionContext = FacesContext.getCurrentInstance().getELContext();
        return expressionFactory.createValueExpression(expressionContext, expression, Object.class);
}Step 1: Click on "Load SelectOneMenu".
Step 2: Click on "Create Postback".
Thanks for having a look at it.
Ristretto

Create class with script

Is there any way to dynamically create a class in a Flex application with a script? Basically what I want to do is loop over data from a database that defines the classes I need, and create them on-the-fly instead of creating them in .as files and recompiling.

Class I doubt, but its attributes indeed u can create dynamically by making
public dynamic class TestClass
public function TestClass()
this.attribute_1 = value...

Upgrade from CS4 to CS5: Dynamically created text isn´t shown anymore.

Hello,
since I have updated my Flash CS4 to CS5, textfields that have been dynamically created inside external classes aren´t filled with text anymore. At least they exist; the cursor appears, when I roll over the place, where it has been placed.
This is how I place it:
1. The font is embeded as Font-Symbol inside the library. Name: "BertholdWalbaumBook", Linkage: "BertholdWalbaumBook";
2. Code:
          moreInfoButtonText = new TextField();
          moreInfoButtonText.text = "More Info";
               //TEXTFORMAT
            var pre_Disco_RecordStandard_TextFormat:TextFormat = new TextFormat();
            pre_Disco_RecordStandard_TextFormat.align = TextFormatAlign.LEFT;
            pre_Disco_RecordStandard_TextFormat.color = "FFFFFF";
            pre_Disco_RecordStandard_TextFormat.font = "BertholdWalbaumBook";
            pre_Disco_RecordStandard_TextFormat.leading = 3;
            pre_Disco_RecordStandard_TextFormat.size = 14.62;
            pre_Disco_RecordStandard_TextFormat.letterSpacing = 0;
            //COORDINATES
            moreInfoButtonText.x = moreInfoButtonBG.x+5;
            moreInfoButtonText.y = moreInfoButtonBG.y-30;
          //TEXTFIELD
            moreInfoButtonText.embedFonts = true;
            moreInfoButtonText.setTextFormat(pre_Disco_RecordStandard_TextFormat);
            moreInfoButtonText.antiAliasType = AntiAliasType.ADVANCED;
            moreInfoButtonText.sharpness = -400;
            moreInfoButtonText.thickness = -200;
            moreInfoButtonText.autoSize = TextFieldAutoSize.RIGHT;
            moreInfoButtonText.wordWrap = true;
            moreInfoButtonText.multiline = false;
          //ADD CHILD
            addChild(moreInfoButtonText);
When I set       moreInfoButtonText.embedFonts = false;    the text is shown with system font, so the problem must cohere with embedding.

In case you haven't seen these
http://www.dotstrosity.net/2010/05/10/flash-cs5-font-embedding-its-totally-different/
http://kb2.adobe.com/cps/831/cpsid_83162.html

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