cmsdk: Mandate app suggest feature xml's for service implementation.

  The feature xml plays two roles:

      1) To allow sdk interface (constructor) to throw when system
      service is unavailable. This allows for clearer platform
      development debugging.

      2) To allow for simpler disambiguation of what services to
      instrument in a modular environment.

Change-Id: Icda71efc084cf91bd358dba24eee4704179be90e
TICKET: CYNGNOS-2290

2 files changed, 17 insertions, 1 deletions

diff --git a/src/java/cyanogenmod/app/CMContextConstants.java b/src/java/cyanogenmod/app/CMContextConstants.java
index 622732d..8cfa04b 100644
--- a/src/java/cyanogenmod/app/CMContextConstants.java
+++ b/src/java/cyanogenmod/app/CMContextConstants.java
@@ -141,5 +141,13 @@ public final class CMContextConstants {
          */
         @SdkConstant(SdkConstant.SdkConstantType.FEATURE)
         public static final String PROFILES = "org.cyanogenmod.profiles";
+
+        /**
+         * Feature for {@link PackageManager#getSystemAvailableFeatures} and
+         * {@link PackageManager#hasSystemFeature}: The device includes the cm app suggest service
+         * utilized by the cmsdk.
+         */
+        @SdkConstant(SdkConstant.SdkConstantType.FEATURE)
+        public static final String APP_SUGGEST = "org.cyanogenmod.appsuggest";
     }
 }
diff --git a/src/java/cyanogenmod/app/suggest/AppSuggestManager.java b/src/java/cyanogenmod/app/suggest/AppSuggestManager.java
index 7bc034c..0eb55d4 100644
--- a/src/java/cyanogenmod/app/suggest/AppSuggestManager.java
+++ b/src/java/cyanogenmod/app/suggest/AppSuggestManager.java
@@ -63,10 +63,18 @@ public class AppSuggestManager {
             return sInstance;
         }
 
-        context = context.getApplicationContext() != null ? context.getApplicationContext() : context;
+        context = context.getApplicationContext() != null ?
+                context.getApplicationContext() : context;
 
         sInstance = new AppSuggestManager(context);
 
+        if (context.getPackageManager().hasSystemFeature(CMContextConstants.Features.APP_SUGGEST)
+                && sImpl == null) {
+            throw new RuntimeException("Unable to get AppSuggestManagerService. " +
+                    "The service either crashed, was not started, or the interface has been" +
+                    " called to early in SystemServer init");
+        }
+
         return sInstance;
     }