Package org.apache.druid.query.operator.window

Class ComposingProcessor

java.lang.Object
org.apache.druid.query.operator.window.ComposingProcessor
All Implemented Interfaces:
Processor
public class ComposingProcessor extends Object implements Processor

  • Constructor Details

    • ComposingProcessor

      public ComposingProcessor(Processor... processors)

  • Method Details

    • getOutputColumnNames

      public List<String> getOutputColumnNames()
      Specified by:
      getOutputColumnNames in interface Processor
      Returns:
      List of output column names for the Processor.

    • getProcessors

      public Processor[] getProcessors()

    • process

      public RowsAndColumns process(RowsAndColumns incomingPartition)
      Description copied from interface: Processor
      Applies the logic of the processor to a RowsAndColumns object
      Specified by:
      process in interface Processor
      Parameters:
      incomingPartition - the incoming RowsAndColumns object
      Returns:
      the transformed RowsAndColumns object

    • validateEquivalent

      public boolean validateEquivalent(Processor otherProcessor)
      Description copied from interface: Processor
      Validates the equivalence of the Processors. This is similar to @{code .equals} but is its own method so that it can ignore certain fields that would be important for a true equality check. Namely, two Processors defined the same way but with different output names can be considered equivalent even though they are not equal.

      This primarily exists to simplify tests, where this equivalence can be used to validate that the Processors created by the SQL planner are actually equivalent to what we expect without needing to be overly dependent on how the planner names the output columns

      Specified by:
      validateEquivalent in interface Processor
      Parameters:
      otherProcessor - the processor to test equivalence of
      Returns:
      boolean identifying if these processors should be considered equivalent to each other.

    • toString

      public String toString()
      Overrides:
      toString in class Object