PackageManager load additional version without App.config #64

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1. milkshakeuk commented on Apr 12, 2021

   

   milkshakeuk

   on Apr 12, 2021

   Last edited by milkshakeuk

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   This should already be possible since PackageManager has its instance publicly available i.e.

   var additionalVersion = new Hl7Package(...);
   PackageManager.Instance.Packages.Add(additionalVersion);
   // or
   PackageManager.Instance.Packages.Insert(7, additionalVersion);

   Actually, this would only be possible if PackageManager was public which currently it isn't.
   This is probably one for the future when we tackle adding configuration as code.

   👍React with 👍1Reacted by Marco Pagliari
2. milkshakeuk

   closed this as completedon Apr 12, 2021
3. milkshakeuk

   reopened this on Apr 12, 2021
4. milkshakeuk

   added

   enhancement

   on Apr 12, 2021
5. franjom commented on Jan 23, 2025

   

   franjom

   on Jan 23, 2025

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   public static class ReflectionExtensions
   {
       public static void AddHl7Package(this Assembly assembly, string packageName, string version)
       {
           // Get the PackageManager type
           var packageManagerType = assembly.GetType("NHapi.Base.PackageManager");
           if (packageManagerType == null)
               throw new InvalidOperationException("PackageManager type not found in the assembly.");
   
           // Get the singleton instance of PackageManager
           var instanceProperty = packageManagerType.GetProperty("Instance", BindingFlags.Public | BindingFlags.Static);
           var packageManagerInstance = instanceProperty?.GetValue(null);
           if (packageManagerInstance == null)
               throw new InvalidOperationException("Unable to retrieve PackageManager instance.");
   
           // Get the Hl7Package type
           var hl7PackageType = assembly.GetType("NHapi.Base.Hl7Package");
           if (hl7PackageType == null)
               throw new InvalidOperationException("Hl7Package type not found in the assembly.");
   
           // Get the Packages property
           var packagesProperty = packageManagerInstance.GetType().GetProperty("Packages", BindingFlags.Public | BindingFlags.Instance);
           var packages = packagesProperty?.GetValue(packageManagerInstance);
           if (packages == null)
               throw new InvalidOperationException("Unable to retrieve the Packages property.");
   
           // Get the constructor for Hl7Package
           var constructorInfo = hl7PackageType.GetConstructor(
               BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
               null,
               new[] { typeof(string), typeof(string) },
               null);
           if (constructorInfo == null)
               throw new InvalidOperationException("Constructor for Hl7Package not found.");
   
           // Create an instance of Hl7Package
           var hl7PackageInstance = constructorInfo.Invoke(new object[] { packageName, version });
   
           // Add the new Hl7Package instance to the Packages list
           var addMethod = packages.GetType().GetMethod("Add", BindingFlags.Public | BindingFlags.Instance);
           if (addMethod == null)
               throw new InvalidOperationException("Add method not found on the Packages collection.");
   
           addMethod.Invoke(packages, new[] { hl7PackageInstance });
       }
   }
   

   and to use it (I use it like this in .net8):

   var assembly = Assembly.Load("nhapi.base");
   assembly.AddHl7Package("your.assembly.that.conforms.to.convention.name", "2.5");
   

   Hope it helps somebody.