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Promises module for Vert.x - java
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package com.darylteo.vertx.promises.java;

import java.util.LinkedHashMap;

import org.vertx.java.core.Handler;

import rx.Observer;
import rx.Subscription;
import rx.util.functions.Function;

import com.darylteo.rx.promises.AbstractPromise;
import com.darylteo.vertx.promises.java.functions.FinallyAction;
import com.darylteo.vertx.promises.java.functions.FinallyFunction;
import com.darylteo.vertx.promises.java.functions.PromiseAction;
import com.darylteo.vertx.promises.java.functions.PromiseFunction;
import com.darylteo.vertx.promises.java.functions.RepromiseFunction;

public class Promise extends AbstractPromise implements Handler {
  public static  Promise defer() {
    return new Promise();
  }

  public Promise() {
    super(new LinkedHashMap>());
  }

  /* ================== */
  /* Strictly Typed Defer Methods */
  // then(onFulfilled)
  public  Promise then(PromiseFunction onFulfilled) {
    return this.promise(onFulfilled, null, null);
  }

  public  Promise then(RepromiseFunction onFulfilled) {
    return this.promise(onFulfilled, null, null);
  }

  public Promise then(PromiseAction onFulfilled) {
    return this.promise(onFulfilled, null, null);
  }

  // then(onFulfilled, onRejected)
  public  Promise then(PromiseFunction onFulfilled,
    PromiseFunction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  public  Promise then(PromiseFunction onFulfilled,
    RepromiseFunction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  public  Promise then(PromiseFunction onFulfilled,
    PromiseAction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  public  Promise then(RepromiseFunction onFulfilled,
    PromiseFunction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  public  Promise then(RepromiseFunction onFulfilled,
    RepromiseFunction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  public  Promise then(RepromiseFunction onFulfilled,
    PromiseAction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  public Promise then(PromiseAction onFulfilled,
    PromiseAction onRejected) {
    return this.promise(onFulfilled, onRejected, null);
  }

  // fail(onRejected)
  public Promise fail(PromiseFunction onRejected) {
    return this.promise(null, onRejected, null);
  }

  public Promise fail(RepromiseFunction onRejected) {
    return this.promise(null, onRejected, null);
  }

  public Promise fail(PromiseAction onRejected) {
    return this.promise(null, onRejected, null);
  }

  // fin(onFinally)
  public Promise fin(FinallyFunction onFinally) {
    return this.promise(null, null, onFinally);
  }

  public Promise fin(FinallyAction onFinally) {
    return this.promise(null, null, onFinally);
  }

  @SuppressWarnings("unchecked")
  protected  Promise promise(Function onFulfilled, Function onRejected, Function onFinally) {
    return (Promise) super._then(onFulfilled, onRejected, onFinally);
  }

  @Override
  public void handle(T event) {
    this.fulfill(event);
  }
}