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Check existence of parameters

egau

Hello,
I would like to add to all my rptdesign some generic script in the beforeFactory that modify values of parameters if they exist. So in my generic script , I first want to check if parameters exist but I don't know how to do that :

if(parameter["test"]) > doesn't work

if(parameter["test"].value != null) > doesn't work

I always got this error : Report parameter "hostgroupID" does not exist... ofc that's what I want to know ^^

So which object do I have to check ? how ?

Thanks in advance,

Regards,

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Comments

CBR

One solution would be to first get a list of all report parameters in beforeFactory and check if the parameter is part of that list using the name of the parameter: 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
//get a list of all report parameters
var params = reportContext.getDesignHandle().getAllParameters();

//traverse that list
for(var i=0; i<params.size(); i++) {
var sParClass = params.get( i ).getClass().toString();
//we need to check if it is a real parameter and not a parameter group
if( sParClass == "class org.eclipse.birt.report.model.api.ScalarParameterHandle" ) {
//do checks here...just a demo how to get name and value
var parameterName = params.get( i ).getFullName();
var parameterValue = reportContext.getParameterValue(parameterName);

}
}
</pre>

egau

Well thanks! With this script , it actually works, I check if my parameter exist ( and write it into a log file) but I'm not able to modify them how I wanted : 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>//get a list of all report parameters
var params = reportContext.getDesignHandle().getAllParameters();

//traverse that list
for(var i=0; i<params.size(); i++) {
var sParClass = params.get( i ).getClass().toString();
//we need to check if it is a real parameter and not a parameter group
if( sParClass == "class org.eclipse.birt.report.model.api.ScalarParameterHandle" ) {
//do checks here...just a demo how to get name and value
var parameterName = params.get( i ).getFullName();
var parameterValue = reportContext.getParameterValue(parameterName);

// to split a multiselect object into list value
if(parameterName == 'multiselectparameter'){
params["multiselectparameter"].value = params["multiselectparameter"].value.join();
}
}
}</pre>
 
I got this error : 
<pre class='_prettyXprint _lang-auto _linenums:0'>TypeError: Cannot read property "value" from undefined (/report/method[@name="beforeFactory"]#23)</pre>
 
I usually do that in all my rptdesign with multiselect 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>params["multiselect"].value = params["multiselect"].value.join();</pre>
 
and it works, but it seems not to work properly here, do you have any idea ?

CBR

Can you try 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
var params = reportContext.getDesignHandle().getAllParameters();
//traverse that list
for(var i=0; i<params.size(); i++) {
var sParClass = params.get( i ).getClass().toString();
//we need to check if it is a real parameter and not a parameter group
if( sParClass == "class.org.eclipse.birt.report.model.api.ScalarParameterHandle" ) {
//do checks here...just a demo how to get name and value
var parameterName = params.get( i ).getFullName();
var parameterValue = reportContext.getParameterValue(parameterName);
// to split a multiselect object into list value
if(parameterName.equals("multiselectparameter")){
params["multiselectparameter"].value = params["multiselectparameter"].value.join();
}
}
}
</pre>

egau

Same problem. But it doesn't come from the test of existence (if(parameterName == 'multiselectparameter') ) it works fine. I checked that using log file : 
 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>importPackage( Packages.java.io );
out = new PrintWriter( new FileWriter( "c:/testparameters.log", true ) );

[ ... ]

if(parameterName == 'multiselectparameter'){
//params["multiselectparameter"].value = params["multiselectparameter"].value.join();
out.println("Parameter multiselectparameterexists");
out.flush();
out.close();
}</pre>
 
And I can see "Parameter multiselectparameterexists" written when I add it to my report. It's really the ".join()" or ".value" , weird -_-.

egau

Hello, 
 
here is the solution, you were really close to, a colleague found it : 
 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>var parameters = reportContext.getDesignHandle().getAllParameters();
//traverse that list
for(var i=0; i<parameters.size(); i++){
var currentParam = parameters.get( i );
//we need to check if it is a real parameter and not a parameter group
if( currentParam.getClass().toString() == "class org.eclipse.birt.report.model.api.ScalarParameterHandle" ) {
//do checks here...just a demo how to get name and value
var parametersName = currentParam.getName();

if(parametersName.equals('multiselect')){
params['multiselect'].value=params['multiselect'].value.join();
}
}
}</pre>
 
Thanks. 
 
Regards,