Transform

All Known Implementing Classes:: AbstractMapTransform, AbstractSynchronousTransform, BrokenTransform, ScriptTransform

public interface Transform

Created by carlg on 1/26/2017.

Method Summary

Modifier and Type

Method

Description

default Collection<PropertyReference>

resolveReferences()

default void

shutdown()

Shutdown hook called by the AbstractBindingHarness.

default void

startup()

Startup hook called by the AbstractBindingHarness.

CompletableFuture<QualifiedValue>

transform(QualifiedValue value)

When the binding or previous transform emits a value, it will be given to this method.

Method Details
- startup
  
  default void startup()
  
  Startup hook called by the AbstractBindingHarness. This method will run on the SessionContext's ExecutionQueue thread. The default implementation is a no-op.
- shutdown
  
  default void shutdown()
  
  Shutdown hook called by the AbstractBindingHarness. This method will run on the SessionContext's ExecutionQueue thread. The default implementation is a no-op.
- resolveReferences
  
  default Collection<PropertyReference> resolveReferences()
- transform
  
  CompletableFuture<QualifiedValue> transform(@Nonnull QualifiedValue value) throws Throwable
  
  When the binding or previous transform emits a value, it will be given to this method. The expectation is that the transform will then push the transformed value onto the callback given to it in the factory
  
  Parameters:
  
  value - The input value to the Transform. It could be the output value of the binding itself if the transform is first in the chain, or it could be a transformed value if it is after the first in the chain. The input QualifiedValue can never be null (though the value it wraps can be null)
  
  Throws:
  
  Throwable - If there is a problem with the transformation