Clean up hasSystemFeature binder cache

Bug: 140788621

This is a non-functional clean-up.
1. Rename the classes and methods used by the binder cache so that
   everything public is based off of the binder name "hasSystemFeature".
2. Modified the hashCode() method to conform to the comments in cl/9965760

Test: Built a debug image and ran one iteration of MPTS.  Verified that no
errors were seen.

Change-Id: I3ffdda43a7dbe30a12449ff346e1e22b379ee308

1 files changed, 13 insertions, 13 deletions

diff --git a/core/java/android/app/ApplicationPackageManager.java b/core/java/android/app/ApplicationPackageManager.java
index 4e6319db97f4..9ca8ee0675c0 100644
--- a/core/java/android/app/ApplicationPackageManager.java
+++ b/core/java/android/app/ApplicationPackageManager.java
@@ -632,22 +632,22 @@ public class ApplicationPackageManager extends PackageManager {
     private static final int SYS_FEATURE_CACHE_SIZE = 256;
     private static final String CACHE_KEY_SYS_FEATURE_PROPERTY = "cache_key.has_system_feature";
 
-    private class SystemFeatureQuery {
+    private class HasSystemFeatureQuery {
         public final String name;
         public final int version;
-        public SystemFeatureQuery(String n, int v) {
+        public HasSystemFeatureQuery(String n, int v) {
             name = n;
             version = v;
         }
         @Override
         public String toString() {
-            return String.format("SystemFeatureQuery(name=\"%s\", version=%d)",
+            return String.format("HasSystemFeatureQuery(name=\"%s\", version=%d)",
                     name, version);
         }
         @Override
         public boolean equals(Object o) {
-            if (o instanceof SystemFeatureQuery) {
-                SystemFeatureQuery r = (SystemFeatureQuery) o;
+            if (o instanceof HasSystemFeatureQuery) {
+                HasSystemFeatureQuery r = (HasSystemFeatureQuery) o;
                 return Objects.equals(name, r.name) &&  version == r.version;
             } else {
                 return false;
@@ -655,32 +655,32 @@ public class ApplicationPackageManager extends PackageManager {
         }
         @Override
         public int hashCode() {
-            return Objects.hashCode(name) + version;
+            return Objects.hashCode(name) * 13 + version;
         }
     }
 
-    private final PropertyInvalidatedCache<SystemFeatureQuery, Boolean> mSysFeatureCache =
-            new PropertyInvalidatedCache<SystemFeatureQuery, Boolean>(
+    private final PropertyInvalidatedCache<HasSystemFeatureQuery, Boolean> mHasSystemFeatureCache =
+            new PropertyInvalidatedCache<>(
                 SYS_FEATURE_CACHE_SIZE,
                 CACHE_KEY_SYS_FEATURE_PROPERTY) {
                 @Override
-                protected Boolean recompute(SystemFeatureQuery query) {
+                protected Boolean recompute(HasSystemFeatureQuery query) {
                     return hasSystemFeatureUncached(query.name, query.version);
                 }
             };
 
     @Override
     public boolean hasSystemFeature(String name, int version) {
-        return mSysFeatureCache.query(new SystemFeatureQuery(name, version)).booleanValue();
+        return mHasSystemFeatureCache.query(new HasSystemFeatureQuery(name, version));
     }
 
     /** @hide */
-    public void disableSysFeatureCache() {
-        mSysFeatureCache.disableLocal();
+    public void disableHasSystemFeatureCache() {
+        mHasSystemFeatureCache.disableLocal();
     }
 
     /** @hide */
-    public static void invalidateSysFeatureCache() {
+    public static void invalidateHasSystemFeatureCache() {
         PropertyInvalidatedCache.invalidateCache(CACHE_KEY_SYS_FEATURE_PROPERTY);
     }