Package ca.uqac.lif.cep.tuples

Class MergeTuples

  • All Implemented Interfaces:
    ca.uqac.lif.azrael.Printable, ca.uqac.lif.azrael.Readable, ca.uqac.lif.cep.Duplicable, ca.uqac.lif.cep.functions.DuplicableFunction
    public class MergeTuples
extends ca.uqac.lif.cep.functions.Function
    Merges the key-value pairs of multiple tuples into a single tuple. If two tuples have the same key, the value in the resulting tuple is that of one of these tuples; which one is left undefined. However, if the tuples have the same value for their common keys, the resuting tuple is equivalent to that of a relational JOIN operation.
    Author:
    Sylvain Hallé

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected FixedTupleBuilder m_builder
      A helper class to build instances of the merged tuples
      protected int m_inputArity
      The number of input tuples to merge

      • Fields inherited from class ca.uqac.lif.cep.functions.Function

        s_maxInputArity

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      MergeTuples duplicate​(boolean with_state)  
      void evaluate​(java.lang.Object[] inputs, java.lang.Object[] outputs)  
      void evaluate​(java.lang.Object[] inputs, java.lang.Object[] outputs, ca.uqac.lif.cep.Context context, ca.uqac.lif.cep.EventTracker tracker)  
      int getInputArity()  
      void getInputTypesFor​(java.util.Set<java.lang.Class<?>> classes, int index)  
      int getOutputArity()  
      java.lang.Class<?> getOutputTypeFor​(int index)  
      void reset()  

      • Methods inherited from class ca.uqac.lif.cep.functions.Function

        duplicate, evaluate, evaluateLazy, evaluatePartial, print, printState, read, readState

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • m_inputArity

        protected int m_inputArity
        The number of input tuples to merge

      • m_builder

        protected FixedTupleBuilder m_builder
        A helper class to build instances of the merged tuples

    • Constructor Detail

      • MergeTuples

        public MergeTuples()

      • MergeTuples

        public MergeTuples​(int arity)

    • Method Detail

      • evaluate

        public void evaluate​(java.lang.Object[] inputs,
                     java.lang.Object[] outputs,
                     ca.uqac.lif.cep.Context context,
                     ca.uqac.lif.cep.EventTracker tracker)
        Specified by:
        evaluate in class ca.uqac.lif.cep.functions.Function

      • evaluate

        public void evaluate​(java.lang.Object[] inputs,
                     java.lang.Object[] outputs)
        Overrides:
        evaluate in class ca.uqac.lif.cep.functions.Function

      • getInputArity

        public int getInputArity()
        Specified by:
        getInputArity in class ca.uqac.lif.cep.functions.Function

      • getOutputArity

        public int getOutputArity()
        Specified by:
        getOutputArity in class ca.uqac.lif.cep.functions.Function

      • reset

        public void reset()
        Overrides:
        reset in class ca.uqac.lif.cep.functions.Function

      • duplicate

        public MergeTuples duplicate​(boolean with_state)
        Specified by:
        duplicate in interface ca.uqac.lif.cep.Duplicable
        Specified by:
        duplicate in class ca.uqac.lif.cep.functions.Function

      • getInputTypesFor

        public void getInputTypesFor​(java.util.Set<java.lang.Class<?>> classes,
                             int index)
        Specified by:
        getInputTypesFor in class ca.uqac.lif.cep.functions.Function

      • getOutputTypeFor

        public java.lang.Class<?> getOutputTypeFor​(int index)
        Specified by:
        getOutputTypeFor in class ca.uqac.lif.cep.functions.Function