Package com.caplin.transformer.module.pipeline

Interface PipelineRegistrar

All Known Implementing Classes:
PipelineRegistrarImpl
public interface PipelineRegistrar

Allows a Transformer Module to register methods for availability in pipelines.

Notes:
  • The API currently does not support methods with return types other than void
  • When overloaded methods are registered with pipelines, the following rules are applied when calling from a pipeline back into Java:
    • check whether the number of arguments matches any available signature
    • check whether the arguments passed to the pipeline function can be converted to the types on the signature
    • If more than one valid signature is found, then no calls into Java are made
Examples: 

 public class MyPipelineCallbacks {
     public void myMethod(int a) {
         System.out.println("called from pipeline with < " + a + ">");
     }

     public void myMethod(int a, int b) {
         System.out.println("called from pipeline with < " + a + "> <" + b + ">");
     }
 }

 //initialise method of Transformer module
 public void initialise(java.lang.String moduleName, TransformerAccessor transformerAccessor) {
      MyPipelineCallbacks callbackObject = new MyPipelineCallbacks();

      transformerAccessor.getPipelineRegistrar().registerPipelineMethod(callbackObject, "myMethod");
 }

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    registerPipelineMethod(Object object, String methodName)
    Registers a function with the name pipelineFunctionName with the Pipeline module so that pipelines can call into Java Transformer modules.
    void
    registerPipelineMethod(Object object, String pipelineFunctionName, String methodName)
    Registers a function with the name pipelineFunctionName with the Pipeline module so that pipelines can call into Java Transformer modules.

  • Method Details

    • registerPipelineMethod

      void registerPipelineMethod(Object object, String methodName) throws NoSuchMethodException
      Registers a function with the name pipelineFunctionName with the Pipeline module so that pipelines can call into Java Transformer modules. The registrar looks up all methods with methodName on the class of object and checks their signatures against valid types defined in PipelineType. All methods passing this validity check will get registered with pipelines. In case of methods being overloaded, the correct one to call will be determined at runtime, with a few limitations - see Notes.
      Parameters:
      object - object where the method will get called on
      methodName - method to be called on the provided object
      Throws:
      NoSuchMethodException - if no method with the given name can be found

    • registerPipelineMethod

      void registerPipelineMethod(Object object, String pipelineFunctionName, String methodName) throws NoSuchMethodException
      Registers a function with the name pipelineFunctionName with the Pipeline module so that pipelines can call into Java Transformer modules. The registrar looks up all methods with methodName on the class of object and checks their signatures against valid types defined in PipelineType. All methods passing this validity check will get registered with pipelines. In case of methods being overloaded, the correct one to call will be determined at runtime, with a few limitations - see Notes.
      Parameters:
      object - object where the method will get called on
      pipelineFunctionName - function name registered with pipelines
      methodName - method to be called on the provided object
      Throws:
      NoSuchMethodException - if no method with the given name can be found