Merge pull request #718 from zsxwing/merge-overloads

Implemented the Merge overloads

Author: benjchristensen

rxjava-core/src/main/java/rx/Observable.java

@@ -1243,10 +1243,8 @@ public static <T> Observable<T> merge(Observable<? extends Observable<? extends
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2) {
-        return create(OperationMerge.merge(t1, t2));
+        return merge(from(t1, t2));
     }
 
     /**
@@ -1266,10 +1264,8 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3) {
-        return create(OperationMerge.merge(t1, t2, t3));
+        return merge(from(t1, t2, t3));
     }
 
     /**
@@ -1290,10 +1286,8 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4) {
-        return create(OperationMerge.merge(t1, t2, t3, t4));
+        return merge(from(t1, t2, t3, t4));
     }
 
     /**
@@ -1315,10 +1309,8 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5) {
-        return create(OperationMerge.merge(t1, t2, t3, t4, t5));
+        return merge(from(t1, t2, t3, t4, t5));
     }
 
     /**
@@ -1341,10 +1333,8 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6) {
-        return create(OperationMerge.merge(t1, t2, t3, t4, t5, t6));
+        return merge(from(t1, t2, t3, t4, t5, t6));
     }
 
     /**
@@ -1368,10 +1358,8 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6, Observable<? extends T> t7) {
-        return create(OperationMerge.merge(t1, t2, t3, t4, t5, t6, t7));
+        return merge(from(t1, t2, t3, t4, t5, t6, t7));
     }
 
     /**
@@ -1396,10 +1384,8 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
-    // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6, Observable<? extends T> t7, Observable<? extends T> t8) {
-        return create(OperationMerge.merge(t1, t2, t3, t4, t5, t6, t7, t8));
+        return merge(from(t1, t2, t3, t4, t5, t6, t7, t8));
     }
 
     /**
@@ -1425,10 +1411,148 @@ public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? e
      * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099.aspx">MSDN: Observable.Merge</a>
      */
-    @SuppressWarnings("unchecked")
     // suppress because the types are checked by the method signature before using a vararg
     public static <T> Observable<T> merge(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6, Observable<? extends T> t7, Observable<? extends T> t8, Observable<? extends T> t9) {
-        return create(OperationMerge.merge(t1, t2, t3, t4, t5, t6, t7, t8, t9));
+        return merge(from(t1, t2, t3, t4, t5, t6, t7, t8, t9));
+    }
+
+    /**
+     * Flattens a sequence of Observables emitted by an Observable into one Observable, without any transformation.
+     * The number of concurrent subscriptions to the Observables is limited by maxConcurrent.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param source an Observable that emits Observables
+     * @param maxConcurrent the maximum number of Observables being subscribed to concurrently
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables emitted by the
+     *         {@code source} Observable
+     * @throw IllegalArgumentException if maxConcurrent <= 0
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh211914(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Observable<? extends Observable<? extends T>> source, int maxConcurrent) {
+        return create(OperationMerge.merge(source, maxConcurrent));
+    }
+
+    /**
+     * Flattens an Observable Iterable into one Observable, without any transformation.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param sequences the Observable Iterable
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables in the Iterable
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh229590(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Iterable<? extends Observable<? extends T>> sequences) {
+        return merge(from(sequences));
+    }
+
+    /**
+     * Flattens an Observable Iterable into one Observable, without any transformation.
+     * The number of concurrent subscriptions to the Observables is limited by maxConcurrent.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param sequences the Observable Iterable
+     * @param maxConcurrent the maximum number of Observables being subscribed to concurrently
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables in the Iterable
+     * @throw IllegalArgumentException if maxConcurrent <= 0
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh229923(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Iterable<? extends Observable<? extends T>> sequences, int maxConcurrent) {
+        return merge(from(sequences), maxConcurrent);
+    }
+
+    /**
+     * Flattens an Observable Iterable into one Observable, without any transformation.
+     * The number of concurrent subscriptions to the Observables is limited by maxConcurrent.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param sequences the Observable Iterable
+     * @param maxConcurrent the maximum number of Observables being subscribed to concurrently
+     * @param scheduler the scheduler to traversal the Observable array on
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables in the Iterable
+     * @throw IllegalArgumentException if maxConcurrent <= 0
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh244329(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Iterable<? extends Observable<? extends T>> sequences, int maxConcurrent, Scheduler scheduler) {
+        return merge(from(sequences, scheduler), maxConcurrent);
+    }
+
+    /**
+     * Flattens an Observable Iterable into one Observable, without any transformation.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param sequences the Observable Iterable
+     * @param scheduler the scheduler to traversal the Observable array on
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables in the Iterable
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh244336(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Iterable<? extends Observable<? extends T>> sequences, Scheduler scheduler) {
+        return merge(from(sequences, scheduler));
+    }
+
+    /**
+     * Flattens an Observable array into one Observable, without any transformation.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param sequences the Observable array
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables in the array
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh229099(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Observable<? extends T>[] sequences) {
+        return merge(from(sequences));
+    }
+
+    /**
+     * Flattens an Observable array into one Observable, without any transformation.
+     * <p>
+     * <img width="640" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/merge.png">
+     * <p>
+     * You can combine the items emitted by multiple Observables so that they
+     * act like a single Observable, by using the {@code merge} method.
+     * 
+     * @param sequences the Observable array
+     * @param scheduler the scheduler to traversal the Observable array on
+     * @return an Observable that emits items that are the result of flattening
+     *         the items emitted by the Observables in the array
+     * @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#merge">RxJava Wiki: merge()</a>
+     * @see <a href="http://msdn.microsoft.com/en-us/library/hh229061(v=vs.103).aspx">MSDN: Observable.Merge</a>
+     */
+    public static <T> Observable<T> merge(Observable<? extends T>[] sequences, Scheduler scheduler) {
+        return merge(from(sequences, scheduler));
     }
 
     /**