Package com.tangosol.util.filter

Class MapEventTransformerFilter<T>

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.filter.MapEventTransformerFilter<T>
All Implemented Interfaces:
ExternalizableLite, PortableObject, Filter<T>, MapEventTransformer, Serializable
public class MapEventTransformerFilter<T> extends ExternalizableHelper implements Filter<T>, MapEventTransformer, ExternalizableLite, PortableObject
MapEventTransformerFilter is a generic multiplexing wrapper that combines two implementations: a Filter (most commonly a MapEventFilter) and a MapEventTransformer and is used to register event listeners that allow to change the content of a MapEvent.
Since:
Coherence 3.4
Author:
gg/jh 2008.05.01
See Also:

  • Constructor Details

    • MapEventTransformerFilter

      public MapEventTransformerFilter()
      No-argument constructor for lite deserialization.

    • MapEventTransformerFilter

      public MapEventTransformerFilter(Filter<T> filter, MapEventTransformer transformer)
      Construct a MapEventTransformerFilter based on the specified Filter and MapEventTransformer.
      Parameters:
      filter - the underlying Filter (e.g. MapEventFilter) used to evaluate original MapEvent objects (optional)
      transformer - the underlying MapEventTransformer used to transform original MapEvent objects

  • Method Details

    • evaluate

      public boolean evaluate(T o)
      Apply the test to the input argument.
      Specified by:
      evaluate in interface Filter<T>
      Parameters:
      o - the input argument to evaluate
      Returns:
      true if the input argument matches the filter, otherwise false

    • transform

      public MapEvent transform(MapEvent event)
      Remove an old value from the specified MapEvent.
      Specified by:
      transform in interface MapEventTransformer
      Parameters:
      event - the original MapEvent object
      Returns:
      modified MapEvent object that does not contain the old value

    • readExternal

      public void readExternal(DataInput in) throws IOException
      Restore the contents of this object by loading the object's state from the passed DataInput object.
      Specified by:
      readExternal in interface ExternalizableLite
      Parameters:
      in - the DataInput stream to read data from in order to restore the state of this object
      Throws:
      IOException - if an I/O exception occurs

    • writeExternal

      public void writeExternal(DataOutput out) throws IOException
      Save the contents of this object by storing the object's state into the passed DataOutput object.
      Specified by:
      writeExternal in interface ExternalizableLite
      Parameters:
      out - the DataOutput stream to write the state of this object to
      Throws:
      IOException - if an I/O exception occurs

    • readExternal

      public void readExternal(PofReader in) throws IOException
      Restore the contents of a user type instance by reading its state using the specified PofReader object.
      Specified by:
      readExternal in interface PortableObject
      Parameters:
      in - the PofReader from which to read the object's state
      Throws:
      IOException - if an I/O error occurs

    • writeExternal

      public void writeExternal(PofWriter out) throws IOException
      Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
      Specified by:
      writeExternal in interface PortableObject
      Parameters:
      out - the PofWriter to which to write the object's state
      Throws:
      IOException - if an I/O error occurs

    • equals

      public boolean equals(Object o)
      Compare the MapEventTransformerFilter with another object to determine equality.
      Overrides:
      equals in class Object
      Returns:
      true iff this MapEventTransformerFilter and the passed object are equivalent

    • hashCode

      public int hashCode()
      Determine a hash value for the MapEventTransformerFilter object according to the general Object.hashCode() contract.
      Overrides:
      hashCode in class Object
      Returns:
      an integer hash value for this object

    • toString

      public String toString()
      Provide a human-readable representation of this object.
      Overrides:
      toString in class Object
      Returns:
      a String whose contents represent the value of this object