Change the license to GPL v3 to be compatible with Apache License 2.0.

HMCLAPI/src/main/java/rx/subscriptions/BooleanSubscription.java

@@ -0,0 +1,26 @@
+package rx.subscriptions;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import rx.Observable;
+import rx.Subscription;
+
+/**
+ * Subscription that can be checked for status such as in a loop inside an {@link Observable} to exit the loop if unsubscribed.
+ * 
+ * @see Rx.Net equivalent BooleanDisposable at http://msdn.microsoft.com/en-us/library/system.reactive.disposables.booleandisposable(v=vs.103).aspx
+ */
+public class BooleanSubscription implements Subscription {
+
+    private final AtomicBoolean unsubscribed = new AtomicBoolean(false);
+
+    public boolean isUnsubscribed() {
+        return unsubscribed.get();
+    }
+
+    @Override
+    public void unsubscribe() {
+        unsubscribed.set(true);
+    }
+
+}

HMCLAPI/src/main/java/rx/subscriptions/Subscriptions.java

@@ -0,0 +1,58 @@
+package rx.subscriptions;
+
+import rx.Subscription;
+import rx.util.functions.Action0;
+import rx.util.functions.FuncN;
+import rx.util.functions.Functions;
+
+public class Subscriptions {
+    /**
+     * A {@link Subscription} that does nothing.
+     * 
+     * @return {@link Subscription}
+     */
+    public static Subscription empty() {
+        return EMPTY;
+    }
+
+    /**
+     * A {@link Subscription} implemented via a Func
+     * 
+     * @return {@link Subscription}
+     */
+    public static Subscription create(final Action0 unsubscribe) {
+        return new Subscription() {
+
+            @Override
+            public void unsubscribe() {
+                unsubscribe.call();
+            }
+
+        };
+    }
+
+    /**
+     * A {@link Subscription} implemented via an anonymous function (such as closures from other languages).
+     * 
+     * @return {@link Subscription}
+     */
+    public static Subscription create(final Object unsubscribe) {
+        final FuncN<?> f = Functions.from(unsubscribe);
+        return new Subscription() {
+
+            @Override
+            public void unsubscribe() {
+                f.call();
+            }
+
+        };
+    }
+
+    /**
+     * A {@link Subscription} that does nothing when its unsubscribe method is called.
+     */
+    private static Subscription EMPTY = new Subscription() {
+        public void unsubscribe() {
+        }
+    };
+}