Dynamically building 'value' attributes with EL

I'm trying to create an <af:inputText> component with a dynamic 'value' attribute. I'd like to generate something like this:
<af:inputText value="#{myBean.myField}"/>
Where 'myField' is a string stored in another var...#{myField}.
Essentially I'd like to concatenate '#{myBean.', #{myField}, and '}' and use it to dynamically specify the value that the inputText is mapped to.
Is there a way to do this with the JSF EL?
Thank you.

I'm almost positively sure that you cannot do what you want to do.
But why do you want do do such a thing like that?
If you want to do a reusable page, you can use the alias bean tag of Tomahawk (www.myfaces.org)

Similar Messages

How to map single context value attribute to multiple value attributes?

Hello,
is there any way to map a single value attribute
from view's context into several value attributes
in controller's context?
The business context of what I want to achieve
is the following: I have a view which can be called
in two modes: read only (RO) and read-write (RW).
The input parameters to the view are the same for
both modes, however when in RO mode, the view calls
a different set of web services than when called
in RW mode. Before calling each of the web services
I need to populate their context value attributes
with appropriate input values.
I know I can do it in Java code, but is it possible
to do it without any programming (doing it in the
source code is prone to errors)?
Any help highly appreciated.
Greetings,
Tomek.

Hi Kishore,
than you very much for your kind help.
I have already created a value attribute of type
boolean and mapped it into the read-only property
of the UI elements. This however does not solve all
of the problems... I will describe it with an
example:
Let's say the form I want to implement will be
used to: create (read-write mode), update (read-
write mode) or show (read-only mode) customer's
data. The customer's data is complex (lots of
data, including tree structures).
The problem is that:
- when the form is called in read-only mode,
it should populate its fields with values
provided by the getCustomerData web service,
- when the form is called to create a new
customer (in read-write) mode, it should
not use the getCustomerData web service.
Instead it should map the input values
entered by the user into input parameters
of the createNewCustomer web service,
- when the form is called to update customer's
data, it should first display values returned
by the getCustomerData web service, and then
it should map the modified values entered by
the user into input parameters of the
updateCustomer web service,
In all the above cases I must map my view's
context data to different controller's context
elements. Doing it directly in the source code
is not a nice solution. Is there any other
way to achieve this?
Calling a form in different modes in not an
unusual thing, so I was hoping that maybe
there are any built-in mechanisms that would
solve the obove problem...
Greetings,
Tomek.

How can I build a table with the time values of a timer from a while loop

Hi:
I have a question concerning building a table:
Every 100ms I read a value from a sensor (while loop with a timer). I would like to build a table with the actual time and the concerning value. For example:
0msec         1V
100msec     2V
200msec     3V
300msec     4V
etc.
If I use the Express VI for building a table, I always get the date and time, but I don't need the date and the time is in the following format: HH:MMS, which is nonsensical for me as I can't differentiate within msec. Can I change the format anywhere?
Can I also save the table to a file or even to an Excelsheet? How can I do that?
Thanks for your help!

Hi Craig:
thank you very much. To solve the mystery : ) :
I want to drive a stepper motor with a specific frequency. To get the current degree value of the motor I would like to measure the current time (from the beginning of the move on). (With a formula I get the degree value out of the time)
Concurrently I would like to get data from a torque sensor and from a pressure sensor. That's why I asked you about the time and the table. The measurement should start with the movement of the motor. How can I do that? Right now I have different block diagrams (different while loops) (see attachment) and I would like to put them in one.
I haven't done the block diagram for the pressure sensor yet, so there is only the one for the torque sensor and the one for the motor.
I also would like to set a mark in the table when the voltage value of an analog input gets under a specific threshold value. Is that possible?
I'm sorry, I'm a novice in LabVIEW. But maybe you can help me.
Thank you very much!
Steffi
Attachments:
motor.vi ‏238 KB
sensor.vi ‏59 KB

Using "Update All Mapped Fields" with multi-value attributes

Is it possible to update a value in a multi-value attribute through the import manager? It appears that if a source value is different then it just gets added as another value to the record.
For example, a product has an attribute of speed which is measured in revolutions/minute. Some products can be rated at two speeds (i.e. 1800/3600).
I created a numeric attribute for speed and enable only nominal rating and selected multi-valued.
In import manager, I set "/" as multi delimiter for source field. This created two entries in destination attribute, 1800 and 3600.
However, if on subsequent imports the speed values changes for this record (i.e. 1200 and 1800) then I will now have 1200, 1800, and 3600 as values for this record.
Would the proper solution be to create two individual numeric attributes that are single valued (i.e. Speed1 and Speed2)?

Hi Aaron,
in your example it would make sense to use two different attributes called "Speed1" and "Speed2". Using the multi value option, MDM allows you to store a list of values into a single field. This list is more or less unlimited, you can add as many values as you like. A change of an existing value is not possible. The reason is that Import Manager does not know, which value you've changed! So it simply adds the "new" record (which is the 1200 in your example) to your value list. This is the intended behaviour of the "update all mapped fields option". If you really want to replace the values, you can check if the "Replace" option is useable for you. But note, that the replace will replace the complete existing record with the incoming new one. This means if the product you want to import with the replace option is smaller than the existing one (maybe it does not contain values for all segments), you'll loose data in MDM.
BR Michael

Problem with editable combo box and creating dynamic table values using js

Hai
I have used jquery.jec.js to make my dropdown list as editable... I need to create dynamic table values on the onChange event of dropdown using javascript.
Now am facing the problem in it...
I am getting duplicate rows in the table... think(assumption) this jquery.jec.js is calling the dropdown again creating duplicate values...
Please help me out.... Any help is appreciable... Thanks in advance

Thanks elOpalo, for your valuable response....
I have found the correct way of doing.
Before i had my code like this,
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>test</title>
<script type="text/javascript" src="js/jquery-latest.js"></script>
<script type="text/javascript" src="js/jquery.jec.js"></script>
<script type="text/javascript">
$(function(){
$('#list').jec();
function giveAlert(){
alert('hello');
</script>
</head>
<body>
<form>
Combo Box:
<select id="list" name="list" onChange="giveAlert();">
<option value="1">one</option>
<option value="2">two</option>
</select>
</form>
</body>
</html>
Now i have changed as the following,
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>test</title>
<script type="text/javascript" src="js/jquery-latest.js"></script>
<script type="text/javascript" src="js/jquery.jec.js"></script>
<script type="text/javascript">
$(function(){
$('select.combo').jec();
$('select.combo')
.change(function() {
alert($(this).val());
}).change();
</script>
</head>
<body>
<form>
<table>
<tr>
<td>Combo Box:</td>
<td><select class="combo"><option value="b">banana</option><option value="a">apple</option></select></td>
</tr>
</table>
</form>
</body>
</html>
The problem is with the function i have called on the onChange Event.. Now i have defined it inside the jquery function of dropdown to make it as editable...

SORTING Partner Result List with value Attributes

Hi Gurus,
I have added two value attribues in partner result list component and trying to sort the same in WEB UI, but is not working alothough I have logic in get_p and on_sort even.
Please help if anyone knows how to sort by value attributes.
Regards.

Hi Ginger,
the problem is because you have no real BOL attribute for your firstname and lastname that the values are not stored.
what you need to do is sort via an internal table.
here is how we did it:
TYPES: BEGIN OF ltyp_cp_sort,
           sort_key1           TYPE string,
           sort_key2           TYPE string,
           sort_key3           TYPE string,
           bp_partner_guid     TYPE bu_partner_guid,
           entity              TYPE REF TO cl_crm_bol_entity,
         END OF ltyp_cp_sort,
         ttyp_cp_sort     TYPE TABLE OF ltyp_cp_sort.
DATA: lt_cp_sort            TYPE ttyp_cp_sort,
        lt_cp_as_sort         TYPE ttyp_cp_sort,
        ls_cp_sort            TYPE ltyp_cp_sort,
        lr_entity             TYPE REF TO cl_crm_bol_entity,
        lv_wrapper            TYPE REF TO cl_bsp_wd_collection_wrapper,
        lv_value              TYPE string,
        lv_firstname          TYPE bu_namep_f,
        lv_lastname           TYPE bu_namep_l.
DATA: lv_bp_partner_guid    TYPE bu_partner_guid,
        lv_partner            TYPE bu_partner.
DATA: lv_archived            TYPE bu_xdele.
FIELD-SYMBOLS:
        <cp_sort>             TYPE ltyp_cp_sort.
FIELD-SYMBOLS:
        <lv_guid>             TYPE crmt_object_guid.
DATA: ls_data_person        TYPE bapibus1006_central_person,
        lo_iterator           TYPE REF TO if_bol_bo_col_iterator.
DATA: lv_number_cp          TYPE i.
Fill up a table with the value of the sort attribute, the entity and its treenode attributes
lv_wrapper = typed_context->result->get_collection_wrapper( ).
lo_iterator = lv_wrapper->get_iterator( ).
lr_entity ?= lv_wrapper->get_first( ).
WHILE lr_entity IS BOUND.
    CLEAR ls_cp_sort.
    CLEAR: lv_value,
           lv_firstname,
           lv_lastname.
    CALL METHOD lr_entity->if_bol_bo_property_access~get_property_as_value
      EXPORTING
        iv_attr_name = 'CONP_GUID'
      IMPORTING
        ev_result    = lv_bp_partner_guid.
here read the firstname and lastname of the BP again in variables
    CALL METHOD lr_entity->if_bol_bo_property_access~get_property_as_value
      EXPORTING
        iv_attr_name = 'ZFIRSTNAME'
      IMPORTING
        ev_result    = ls_cp_sort-sort_key1.
    CALL METHOD lr_entity->if_bol_bo_property_access~get_property_as_value
      EXPORTING
        iv_attr_name = 'ZLASTNAME'
      IMPORTING
        ev_result    = ls_cp_sort-sort_key2.
    TRANSLATE ls_cp_sort-sort_key1 TO UPPER CASE.
    TRANSLATE ls_cp_sort-sort_key2 TO UPPER CASE.
    ls_cp_sort-bp_partner_guid = lv_bp_partner_guid.
    ls_cp_sort-entity          ?= lr_entity.
    INSERT ls_cp_sort INTO TABLE lt_cp_sort.
    lr_entity ?= lv_wrapper->get_next( ).
ENDWHILE.
lv_wrapper->clear( ).
Now you are sorting the way the user wants to sort is, so change this code according to your needs and the users input..
SORT lt_cp_sort BY sort_key1 sort_key2.
UNASSIGN <cp_sort>.
After having sorted the list, add it back to the collection wrapper...
LOOP AT lt_cp_sort ASSIGNING <cp_sort>.
    lv_wrapper->add( <cp_sort>-entity ).
ENDLOOP.
Hope this helps a bit...
KR,
Micha

Need to bind value attributes of Component controller with value attributes

Hi,
I am developing a Java Web Dynpro application which is importing RFC Model.

Hi Kaushik,
It is very simple to enter values in webdynpro and to update the ztable through RFC
All you hav to do is
1. Create the ztable , RFC to import data into that table,
2. Create the model in webdynpro with that RFC
3. First map the ModelInputElements to the component controller(say zid, zname) (you can have your own value attribute in component controller say id , name )
4. Map the attributes to the view where the input field is there
5. Now write the code as follows,
Zxxx in = new Zxxx();
wdContext.nodeZxx_InputElement.bind(in);
in.setZid(wdcontext.currentContextElement().getId()); // getId component controllers attribute and getZid is model' s mapped attributre
in.setZname(wdcontext.currentContextElement().getName()); // getName component controllers attribute and getZname is model's mapped attributre
/* u need not have to map that model attrobute to component attribute for that */
try
in.execute();
Catch(Eception e)
e.printStackTrace();
Regards,
Sam Charles J.

Prompts with dynamic default values

I have a request from my client to modify several reports so that two date prompts will have default values populated with the first and last day of the previous month. All of the reports are currently using custom sql so I have to be able get the dynamic default value in the extended @prompt syntax. However, I am not able to use any of the sql functions since the functions merely appear as plain text as the default value itself.
I have found a few work arounds to achieve the functionality of the dynamic prompts, but I cannot get the actual default value displayed to the user to be dynamic. Is it possible to achieve this by using only the custom sql?

Hi Sandeep ,
Below blog may answer your query .
Dave&#8217;s Adventures in Business Intelligence &raquo; Dynamic Dates Part III: Monthly Date Ranges
Search for And for Last Month?

Object would have more then one attribute with the tag :VALUE

I'm creating a new component in Ultiboard - a 100 pin connector. This connector (Hirose) has 4 rows of 25 pins. Alternate rows are staggered. I'm trying to name each pin with it's appropiate name: A1, A2, A3 ....A50. Then B1, B2, B3 .....B50.
When I change the VALUE or NUMBER attribute, I get the DRC error message:
This action cannot be completed because the resulting Object would have more then one attribute with the tag :VALUE
Please remove one of the attributes and try again.
Okay, so I've tried deleting the tag and now I can't name the pin at all.
What am I missing?

You should be in the footprint editor to edit the pin name. Select tools>>Database>>Database Manager, highlight the component in your database and click on the Edit icon. In the footprint editor, double click on the pad and a SMT or THT pin Properties dialog appears, select the Attributes tab and highlight the Number row, press the change button and you should be able to change the pin name.
Tien P.
National Instruments

Hiow to build digital waveform with transition values bigger U32?

Greetings!
Is that possible to build digital data with transitions values represented bigger than U32 values? (It seems to me that Labview 8.0 cannot accept U64. See attachment.)
What do you recommend? I cannot change dt, so scaling does not work. This is because, the record length could be very long...and the waveform should be connected to a digital waveform graph.
Thanks in advance!
Attachments:
ReplaceTransitionValues.jpg ‏21 KB

Hello Dawid,
Thank you for the answer.
Yes, I'd like to build a big array, which although would not be so big... I have not so many samples (just a few thousands) but the samples could be very far from each other. That's why I need U64.
I'm using compressed digital waveform to transport and display the samples, where the transition value functions as an offset (counted in dt) from the first sample.
For example, to store a 1Hz signal with sampling rate 100MHz the transitions will accumulate by 50M. If the record has 1000 samples then the last transition value will reach 50G which is much bigger than a U32 can store.
You might ask why so high the sampling rate for a 1Hz signal... The signal is stochastic, could be faster, and I would like to keep tha fast pulses also.
I dig into the "Append digital samples.vi" (see attachment) and I found the transition array is build by U32... I hope I did not misunderstand you, but I think it does not help. I suspect even the Digital Waveform Graph itself is not able to accept values over the U32 range, however, I should try that.
Best Regards,
Lamaze
Attachments:
AppendSamples.jpg ‏155 KB

Dynamic Heading not translated in report template "Value Attribute Pairs"

Hello,
I created a report in which I use application item names in the column heading of the items.
When I use the report template "Value Attribute Pairs" the heading displays not the contents of the application item names but the exact contents of the headings.
for instance:
application item name "trm_label_1" has the value : "Naam".
I created a report based on the SQL: select x.name from persons x
The heading of column "name" is: "&TRM_LABEL_1.".
The report shows the text "&TRM_LABEL_1." instead of "Naam".
When I change the report template in "Standard" the substitution is done well.
Can anyone explain what (not) happens and how I can fix this problem?
Gr.
Rob

Hi Rob,
You can do this by choosing as Headings Type: PLSQL in the Column Attributes.
You would have something like Deptno:DName:Loc:&APP_ITEM.
Where the first columns are normal text and the last one is an application item.
Regards,
Dimitri
-- http://dgielis.blogspot.com/
-- http://apex-evangelists.com/
-- http://apexblogs.info/

Facing problem with Value Attributes

Hi,
I have created a value attribute under the context node. This attribute is editable field. User can enter value for this attribute on WEBUI.
Now, my problem is in GET_METHOD.
In get method, normally we get the value using "COLLECTION_WRAPPER" or "ITERATOR". If the attribute is BOL attribute , then we can get the value from these . However my attribute is value attribute, and I am unable to get the value using COLLECTION_WRAPPER or ITERATOR. So, when the user enters any value it is coming into GET_METHOD, and displaying blank value on the screen.
Now my bottom line question is: if the attribute is value attribute, how can we get the value in GET method.
Note: I can't add it as BOL attribute, for my case it is not possible.
Thanks,
Sandeep

Hi,
if it is a pure value note then you could access this using this class instead of bol class:
lr_value_node TYPE REF TO cl_bsp_wd_value_node.
Kind regards
Manfred

XML/XSLT: Setting xsl:include href attribute with a variable

I have a main layout stylesheet and depending on which page the user selects I want to use xsl:include to display the selected information in the 'content' DIV. The process works fine if hardcode it like this:
<xsl:include href="welcome.xsl"/>
<div id="content"
<xsl:call-template name="welcome"/>
</div>
but, what I would like to do is have the name of the included template pulled from the xml file depending on which page was selected by the user. Something similar to this:
<xsl:variable name="ss">
<xsl:text><xsl:value-of select="root/stylesheet"/></xsl:text>
</xsl:variable>
<xsl:include href="{$ss}.xsl"/>
<div id="content">
<xsl:apply-template name="{$ss}"/>
</div>
So far I have tried using many different forms of code and have been unable to get this to work. Any ideas?
EDIT: Okay, I have it partly figured out, at least why it isn't working. As far as I can tell, the 'xsl:include' tag must be a child of the 'xsl:stylesheet' tag, and is thus declared before the <xsl:template match="/"> which means it can't read the xml element to even store it in the variable. I have an idea of how to accomplish what I need, though.
Last edited by munkyeetr (2009-01-28 03:29:58)

I have attempted the same thing before as well. The only way I was able to dynamically build the xsl:include was to declare a new namespace e.g xmlns:out="output.xsl" in my XSL file and do something like the following:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:out="output.xsl">
<xsl:namespace-alias stylesheet-prefix="out" result-prefix="xsl"/>
<xsl:varible name="xxx" select=" 'myFile.xsl' "/>
<xsl:template match="/">
<out:stylesheet version="1.0">
<out:template match="/">
<out:include>
<xsl:attribute name="href">
<xsl:value-of select="$xxx" />
</xsl:attribute>
</out:include>
</out:template>
</out:stylesheet>
</xsl:template>
</xsl:stylesheet>
When applied to any valid XML document this produces the XSL file you are after as the output.
To use this output against your intended XML source consider the following: A Java program can very quickly apply the above stylesheet to any XML source to get the output you want... then apply that XSL result to the actual XML document you are wanting to transform. From here you can do what you want with the transformed result.

Getting rid of "value" attribute in f:selectItems?

Hello,
There is a simple problem I am facing at work that is actually hurting us significantly... we have a JSF 1.1 (yes, it's very old!) situation where we need to present a page that has a very long dropdown list, more than 5000 options in it. The problem is that the options are very long, and the entire page ends up being over 600Kb in the browser, and worse than that the application server gobbles up massive amounts of RAM just to generate the page.
One optimization we want to do is to take advantage of the following fact: all of the options have values that match the labels. In other words, our options look like this:
<option value="longString1">longString1</option>
<option value="longString2">longString2</option>
<option value="longString3">longString3</option>
We'd like to reduce the page by 50% with a simple optimization: suppress the value attributes like the following:
<option>longString1</option>
<option>longString2</option>
<option>longString3</option>
We are generating these options in an ArrayList of SelectItems, and using an f:selectItems to generate the HTML... but we have NOT figured out how to suppress the value attributes. Try as we might, we are unable to remove them... Is there any way to get:
<f:selectItems ...>
to just display the labels???
Or is there another approach we should use??
Thanks in advance.

Hi,
Can't help specifically with JSF 1.1 I'm afraid, but in 2.0 you need to supply a custom renderer to achieve this. The default MenuRenderer will always write out the value attribute, as per the following code:
// com.sun.faces.renderkit.html_basic.MenuRenderer
protected boolean renderOption(...) {
ResponseWriter writer = context.getResponseWriter();
writer.startElement("option", component);
writer.writeAttribute("value", valueString, "value");
writer.write(curItem.getLabel());
writer.endElement("option");
}I achieved an option list with no value attributes by extending this class, overriding the renderOption method, commenting out the writeAttribute line, and setting that as the default renderer for the SelectOneMenu. Like I said, this was JSF 2, but maybe a similar approach would work for JSF 1.1?
On a completely different approach, how often do the values in the list change? If they are infrequent, then maybe you could use something like the following:
- dynamically create a javascript file that holds the data, plus a method to build an option list from this data
- include a reference to this javascript file in the page header
- create a custom tag in the page which uses the javascript to build the option tags
The advantage of this is that you can let the browser cache the big javascript file with all the options in it, and only include a link to it and a call to the javascript function in the page data. If required, you can add a sequence number to the javascript link to force the browser to reload it when the data changes.
Obviously, you still get the hit the first time you load the list (although the data here is much more concise, as you don't need to send the XML tags at this point and also you only need to send each value once), and it's not as useful if your data changes frequently. Also dumps some processing on the client side, but that sounds like it would be a good thing in your case!
I've used this approach in other situations where I had to repeatedly push a lot of static data to the client. Never actually used it from JSF, but the principle is still valid. Let me know if you think it would be useful; sure I've still got the old javascript lying around somewhere
Cheers,
Barney
@EJP / qimbal2: The OP asked a pretty specific question: "how to render a dropdown list without the value attribute", which is a perfectly valid question. Yes, we can all see that 5,000 items in a drop down list is not ideal, and I understand that anyone answering questions like these is generally doing so on their own time, but just stating that the design sucks isn't really helping.

Value nodes with depth in Context - programmatically binding.

I am resonably new to Java Webdynpro and have been unable to solve this issue so far if someone has a link to a implementation (pseudo code) it would be greatly appreciated.
I have a context supplied from an interface that is not flat.
With data in the context it may look something like this with value attributes in each Node
Context -
-Node A1
           --- Node B1
           --- Node B2
- Node A2
           --- Node B3
           --- Node B4
If the A nodes where only nodes I could loop through the number of Nodes I wanted to create, something like;
   INodeAElement tempNode = wdContext.createNodeAElement();
   tempNode.setAttributes ..........
   wdContext.NodeNodeA.bind(tempNode).
or build and arraylist and bind that ...but when it comes to a Node with daughter Nodes I havent the slight idea of how to build the structure. I'm sure its a very simple answer but I have no idea how to do it, and I havent been able to find any reference on how to do it.
Can anyone point me in the right direction ..
thanks in advance.

Context -
-Node A1
--- Node B1
--- Node B2
- Node A2
--- Node B3
--- Node B4
It depends on if the B-nodes are singleton or non-singleton child nodes.
For non-singleton child nodes there exists one B-node for each A-node-element.
In that case the context can be filled like this:
IA1Element a1 = wdContext.nodeA1().createAndAddA1Element();
for (int i = 0; i < some_number; ++i)
IB1Element b1 = a1.nodeB1().createAndAddB1Element();
for (int i = 0; i < some_number; ++i)
IB2Element b2 = a1.nodeB2().createAndAddB2Element();
And so on.
Armin

Dynamically building 'value' attributes with EL

Similar Messages

Maybe you are looking for