Package com.oracle.coherence.concurrent.executor

Class TaskCollectors.CountCollector<T>

java.lang.Object

com.oracle.coherence.concurrent.executor.AbstractCollector<T,Integer>

com.oracle.coherence.concurrent.executor.TaskCollectors.CountCollector<T>

Type Parameters:

T - the results type.

All Implemented Interfaces:

Task.Collector<T,List<T>,Integer>, ExternalizableLite, PortableObject, Serializable

Enclosing class:

TaskCollectors

public static class TaskCollectors.CountCollector<T>
extends com.oracle.coherence.concurrent.executor.AbstractCollector<T,Integer>

A Task.Collector that counts the number of results are present.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
CountCollector()	Constructs a TaskCollectors.CountCollector (required for serialization).

Method Summary

Modifier and Type	Method	Description
Function<List<T>,Integer>	finisher()	Perform the final transformation from the intermediate accumulation type A to the final result type R.
void	readExternal(PofReader in)	Restore the contents of a user type instance by reading its state using the specified PofReader object.
void	readExternal(DataInput in)	Restore the contents of this object by loading the object's state from the passed DataInput object.
void	writeExternal(PofWriter out)	Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
void	writeExternal(DataOutput out)	Save the contents of this object by storing the object's state into the passed DataOutput object.

Methods inherited from class com.oracle.coherence.concurrent.executor.AbstractCollector

accumulator, finishable, supplier

Methods inherited from class java.lang.Object

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

Constructor Detail

CountCollector

public CountCollector()

Constructs a TaskCollectors.CountCollector (required for serialization).

Method Detail

finisher

public Function<List<T>,Integer> finisher()

Description copied from interface: Task.Collector

Perform the final transformation from the intermediate accumulation type A to the final result type R.

Returns:

a function which transforms the intermediate result to the final result

readExternal

public void readExternal(DataInput in)
                  throws IOException

Description copied from interface: ExternalizableLite

Restore the contents of this object by loading the object's state from the passed DataInput object.

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

NotActiveException - if the object is not in its initial state, and therefore cannot be deserialized into

writeExternal

public void writeExternal(DataOutput out)
                   throws IOException

Description copied from interface: ExternalizableLite

Save the contents of this object by storing the object's state into the passed DataOutput object.

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

Description copied from interface: PortableObject

Restore the contents of a user type instance by reading its state using the specified PofReader object.

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

Description copied from interface: PortableObject

Save the contents of a POF user type instance by writing its state using the specified PofWriter object.

Parameters:

out - the PofWriter to which to write the object's state

Throws:

IOException - if an I/O error occurs