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This is a special abstract implementation that centralizes the routine invocation inside a single method, which gets called only when all the inputs are available.

The implementing class may additionally override the invocation methods to specifically handle the object lifecycle. Note anyway that the superclass must be invoked in order to properly work.

Created by davide on 9/7/14.

<INPUT> the input data type.
<OUTPUT> the output data type.
public abstract class SingleCallInvocation<INPUT, OUTPUT>
        extends TemplateInvocation<INPUT, OUTPUT> {
    private ArrayList<INPUT> mInputs;

This method is called when all the inputs are available and ready to be processed.

inputs the input list.
result the result channel.
    public abstract void onCall(@Nonnull List<? extends INPUT> inputs,
            @Nonnull ResultChannel<OUTPUT> result);
    public void onInput(final INPUT input, @Nonnull final ResultChannel<OUTPUT> result) {
        if ( == null) {
             = new ArrayList<INPUT>();
    public void onResult(@Nonnull final ResultChannel<OUTPUT> result) {
        final ArrayList<INPUT> inputs = ;
        final ArrayList<INPUT> clone;
        if (inputs == null) {
            clone = new ArrayList<INPUT>(0);
        } else {
            clone = new ArrayList<INPUT>(inputs);
    public void onReturn() {
        final ArrayList<INPUT> inputs = ;
        if (inputs != null) {
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