Apple Wallet Pass using ColdFusion and Java - coldfusion

Question

I'm creating an Apple Wallet Pass using a combination of ColdFusion and Java. I have a cfc that creates the pass. It utilizes Java to sign and compressed the pass. I'm using these projects on GitHub https://github.com/dawesi/cfwheels-passkit and https://github.com/drallgood/jpasskit
Here I'm trying to create a pass:
<cfset mypass = new passkit()>
<cfset result = mypass.createPassbook()>
The passkit.cfc
<cfcomponent displayname="Apple Passbook Plugin" output="false">
<cffunction name="init" output="false">
<cfscript>
this.version = "1.1.8";
return this;
</cfscript>
</cffunction>
<cffunction name="createPassbook" returntype="any" output="false">
<cfargument name="type" type="string" default="generic"/>
<cfscript>
var loc = {};
loc.returnValue = createObject('component','PassBook').init(arguments.type);
return loc.returnValue;
</cfscript>
</cffunction>
The PassBook.cfc
<cfcomponent displayname="Apple Passbook" output="false">
<cffunction name="init" output="false">
<cfargument name="type" type="string" default="generic"/>
<cfscript>
setType(arguments.type);
return this;
</cfscript>
</cffunction>
<cffunction name="build" returntype="any" output="false">
<cfargument name="file" type="string" required="false"/>
<cfargument name="password" type="string" default=""/>
<cfscript>
var loc = {};
//Set things on the passbook at the end
if(structKeyExists(variables,'barcode'))
$getPassBook().setBarcode(variables.barcode);
//Get the correct type that they set it too
switch(variables.type){
case 'boardingpass':
loc.passClass = 'PKBoardingPass';
loc.passMethod = 'setBoardingPass';
break;
case 'coupon':
loc.passClass = 'PKCoupon';
loc.passMethod = 'setCoupon';
break;
case 'eventticket':
loc.passClass = 'PKEventTicket';
loc.passMethod = 'setEventTicket';
break;
case 'storecard':
loc.passClass = 'PKStoreCard';
loc.passMethod = 'setStoreCard';
break;
default:
loc.passClass = 'PKGenericPass';
loc.passMethod = 'setGeneric';
break;
}
//Create it, and add the fields
loc.pass = $createJavaObject('de.brendamour.jpasskit.passes.#loc.passClass#');
if(structKeyExists(variables,'fields')){
for(loc.type in variables.fields){
loc.method = variables.fields[loc.type].method;
loc.fields = variables.fields[loc.type].fields;
//loc.pass[loc.method](loc.fields);
loc.dynamicMethod = loc.pass[loc.method]; // Get method
loc.dynamicMethod(loc.fields); // Invoke it
}
//$getPassBook()[loc.passMethod](loc.pass);
loc.dynamicMethod2 = $getPassBook()[loc.passMethod];
loc.dynamicMethod2(loc.pass);
//Sign and make the archive
loc.signingUtil = $createJavaObject('de.brendamour.jpasskit.signing.PKSigningUtil');
loc.signingInfo = loc.signingUtil.loadSigningInformationFromPKCS12FileAndIntermediateCertificateFile(
$passBookCertificateLocation(),
arguments.password,
$intermediateCertificateLocation()
);
loc.bytes = loc.signingUtil.createSignedAndZippedPkPassArchive(
$getPassBook(),
variables.templatePath,
loc.signingInfo
);
//See if we are writing this to a file
if(structKeyExists(arguments,'file') && len(arguments.file)){
loc.file = $createJavaObject('java.io.FileOutputStream').init(arguments.file);
loc.file.write(loc.bytes);
loc.file.close();
}
return loc.bytes;
</cfscript>
</cffunction>
</cfcomponent>
But I'm running into this bug. I think it's missing something. Can anyone help?
Invalid CFML construct found on line 354 at column 42.
ColdFusion was looking at the following text:
loc.method
The CFML compiler was processing:
A script statement beginning with loc.pass on line 354, column 33.
A script statement beginning with { on line 351, column 58.
A script statement beginning with for on line 351, column 25.
A script statement beginning with { on line 350, column 56.
A script statement beginning with if on line 350, column 17.
A cfscript tag beginning on line 317, column 10.
A cfscript tag beginning on line 317, column 10.
The error occurred in /Applications/ColdFusion2016/cfusion/wwwroot/passkit/PassBook.cfc: line 354
Called from /Applications/ColdFusion2016/cfusion/wwwroot/passkit/passkit.cfc: line 14
Called from /Applications/ColdFusion2016/cfusion/wwwroot/passkit/test_walletpass.cfm: line 7
352 : loc.method = variables.fields[loc.type].method;
353 : loc.fields = variables.fields[loc.type].fields;
354 : loc.pass[loc.method](loc.fields);
355 : }

Answer 1

If it's not working with the latest CF, it might contain syntax specific to another engine, like Lucee. I didn't review the whole thing, but I think this is the line it's complaining about:
loc.pass[loc.method](loc.fields);
AFAIK, Adobe's ColdFusion doesn't support that kind of dynamic method call. This thread describes a hack that might work around the limitation. Basically, split it into two actions. Store the method reference in a variable. Then invoke the method on that variable. Example:
loc.dynamicMethod = loc.pass[loc.method]; // Get method
loc.dynamicMethod(loc.fields); // Invoke it
// ... same issue a few lines down
//$getPassBook()[loc.passMethod](loc.pass);
loc.dynamicMethod = $getPassBook()[loc.passMethod];
loc.dynamicMethod(loc.pass);
Do note the important caveat
The caveat with the method I suggested is that it pulls the method out
of the CFC, so it will be running in the context of the calling code,
not the CFC instance. Depending on the code in the method, this might
or might not matter.
Not having used the component, can't say whether or not it's relevant in this scenario.