"cqDesign" variable in Expression Language(EL)

Apart from the supported variables/functions in Expression Language, we can have custom variable created with help of ExpressionCustomizer(com.adobe.granite.ui.components.ExpressionCustomizer) and the same can be made use of in Expression Language.
One such variable is cqDesign used to fetch design properties as we do with currentStyle.

Implementation Details:
Design design = getDesign();
ExpressionCustomizer customizer = ExpressionCustomizer.from(request);
customizer.setVariable("cqDesign", design);

Usage in granite:hide:
  • granite:hide property with cqDesign variable in EL has been used widely in Core Components.
  • Illustration of Core List component related to this with screenshots has been mentioned in helpx link
  • It controls the list displaying options of dialog using values/properties configured in Design mode of List component(in case of static template) or via Policy of List component (in case of Editable template)
  • Given that "cqDesign" is associated with Design, we can write our own custom conditions related to design to control our resources from being displayed.
Usage in setting value for dialog field:

Let's say, the value property of certain dialog field can be set based on some conditions related to design properties.
Eg : value -> ${not empty cqDesign.somecustomproperty ?  x : y}

Comments

Post a Comment

Popular posts from this blog

Embedding Third party dependency/OSGi bundle in AEM application hosted in AEMasCS

Image
This post illustrate the ways of embedding third party dependency in AEM maven project. Steps are mentioned considering the project structure to be followed for AEMasCS while the same can be followed for classic versions too.  Before we begin, I would like to explain the scenario of including a dependency in our AEM maven project.  When we would like to make use of an API that is not already available in our project, we look for that in maven-central repository and specify the dependency in main pom.xml and desired module's pom.xml file. (Lets say, AWS S3 Java SDK V2 dependency) Upon updating the project in the IDE, we would see our class files (making use of those APIs) are compiled/build successfully without any errors.  Now, in the context of AEM/OSGi environment, when the same package and hence the bundle is deployed to AEM instance, dependencies that we added new might not be resolved/available in the OSGi as a bundle. Something like the below This indicates that the...
Read more

OSGI Factory Configuration implementation

OSGI Factory configuration is used to have many instances of an OSGI config (represented/identified via an identifier) for the single OSGI service/PID. Most often used OOB Factory configurations for example: Logger Factory/writer configuration (for log statements) Service user Mapper service Amendment (for using service resource resolver in projects) Few sample real time use case for the need of OSGI factory config: For multi tenant projects, if we have generic service used across tenants with properties/attributes specific to tenant. For single tenant, generic service targeting all locales with properties/attributes specific to locale. (where generic service -> holds logic in the lines of calling third party service for retrieving/updating information.) Implementation: ( In terms of OSGI R6 annotations ): Create Object Class Definition(OCD) defining desired properties for the OSGI service. - OSGIFactoryConfigOCD.java OSGI Service/Factory service to retrieve ...
Read more

Embed Third party dependency using bnd-maven-plugin

Image
This post explains the use of bnd-maven-plugin to embed third party dependency  Two main instructions of bnd-maven-plugin that serves the purpose are detailed below.  -conditionalpackage  pick packages from respective library and copy them in the bundle. Any dependencies of those copied packages will also be copied if they match the selectors. This means we need to explicitly list all the Java package names of desired dependency as part of this instruction (including its transitive dependencies) More about conditionalpackage instruction from official docs -  https://bnd.bndtools.org/instructions/conditionalpackage.html -includeresource  For including resource inline -includeresource: @artifactId-version.jar!/* For embedding as a jar with an entry in bundle class path -includeresource: artifactId-version.jar;lib:=true For several other possible combinations for including the resource, please check - https://bnd.bndtools.org/instructions/includeresource.html Wi...
Read more