Merge "Add extra compat change overriding methods."

am: b389ffe2d9

Change-Id: I77f36a1d9be2d486ca126472f26b5a35739a88cb

core/java/com/android/internal/compat/CompatibilityChangeConfig.aidl

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.compat;
+
+parcelable CompatibilityChangeConfig;

core/java/com/android/internal/compat/CompatibilityChangeConfig.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.compat;
+
+
+import android.compat.Compatibility.ChangeConfig;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Parcelable containing compat config overrides for a given application.
+ * @hide
+ */
+public final class CompatibilityChangeConfig implements Parcelable {
+    private final ChangeConfig mChangeConfig;
+
+    public CompatibilityChangeConfig(ChangeConfig changeConfig) {
+        mChangeConfig = changeConfig;
+    }
+
+    /**
+     * Changes forced to be enabled.
+     */
+    public Set<Long> enabledChanges() {
+        return mChangeConfig.forceEnabledSet();
+    }
+
+    /**
+     * Changes forced to be disabled.
+     */
+    public Set<Long> disabledChanges() {
+        return mChangeConfig.forceDisabledSet();
+    }
+
+    private CompatibilityChangeConfig(Parcel in) {
+        long[] enabledArray = in.createLongArray();
+        long[] disabledArray = in.createLongArray();
+        Set<Long> enabled = toLongSet(enabledArray);
+        Set<Long> disabled = toLongSet(disabledArray);
+        mChangeConfig = new ChangeConfig(enabled, disabled);
+    }
+
+    private static Set<Long> toLongSet(long[] values) {
+        Set<Long> ret = new HashSet<>();
+        for (long value: values) {
+            ret.add(value);
+        }
+        return ret;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        long[] enabled = mChangeConfig.forceEnabledChangesArray();
+        long[] disabled = mChangeConfig.forceDisabledChangesArray();
+
+        dest.writeLongArray(enabled);
+        dest.writeLongArray(disabled);
+    }
+
+    public static final Parcelable.Creator<CompatibilityChangeConfig> CREATOR =
+            new Parcelable.Creator<CompatibilityChangeConfig>() {
+
+                @Override
+                public CompatibilityChangeConfig createFromParcel(Parcel in) {
+                    return new CompatibilityChangeConfig(in);
+                }
+
+                @Override
+                public CompatibilityChangeConfig[] newArray(int size) {
+                    return new CompatibilityChangeConfig[size];
+                }
+            };
+}

core/java/com/android/internal/compat/IPlatformCompat.aidl

@@ -18,6 +18,8 @@ package com.android.internal.compat;
 
 import android.content.pm.ApplicationInfo;
 
+parcelable CompatibilityChangeConfig;
+
 /**
  * Platform private API for talking with the PlatformCompat service.
  *
@@ -125,4 +127,21 @@ interface IPlatformCompat
      * @return {@code true} if the change is enabled for the current app.
      */
     boolean isChangeEnabledByUid(long changeId, int uid);
-}
+
+    /**
+     * Add overrides to compatibility changes.
+     *
+     * @param overrides Parcelable containing the compat change overrides to be applied.
+     * @param packageName The package name of the app whose changes will be overridden.
+     *
+     */
+    void setOverrides(in CompatibilityChangeConfig overrides, in String packageName);
+
+    /**
+     * Revert overrides to compatibility changes.
+     *
+     * @param packageName The package name of the app whose overrides will be cleared.
+     *
+     */
+    void clearOverrides(in String packageName);
+}

services/core/java/com/android/server/compat/CompatConfig.java

@@ -25,6 +25,7 @@ import android.util.Slog;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.compat.CompatibilityChangeConfig;
 import com.android.server.compat.config.Change;
 import com.android.server.compat.config.XmlParser;
 
@@ -186,6 +187,43 @@ public final class CompatConfig {
         }
         return overrideExists;
     }
+    /**
+     * Overrides the enabled state for a given change and app. This method is intended to be used
+     * *only* for debugging purposes.
+     *
+     * <p>Note, package overrides are not persistent and will be lost on system or runtime restart.
+     *
+     * @param overrides list of overrides to default changes config.
+     * @param packageName app for which the overrides will be applied.
+     */
+    public void addOverrides(
+            CompatibilityChangeConfig overrides, String packageName) {
+        synchronized (mChanges) {
+            for (Long changeId: overrides.enabledChanges()) {
+                addOverride(changeId, packageName, true);
+            }
+            for (Long changeId: overrides.disabledChanges()) {
+                addOverride(changeId, packageName, false);
+            }
+        }
+    }
+
+    /**
+     * Removes all overrides previously added via {@link #addOverride(long, String, boolean)} or
+     * {@link #addAppOverrides(CompatibilityChangeConfig, String)} for a certain package.
+     *
+     * <p>This restores the default behaviour for the given change and app, once any app
+     * processes have been restarted.
+     *
+     * @param packageName The package for which the overrides should be purged.
+     */
+    public void removePackageOverrides(String packageName) {
+        synchronized (mChanges) {
+            for (int i = 0; i < mChanges.size(); ++i) {
+                mChanges.valueAt(i).removePackageOverride(packageName);
+            }
+        }
+    }
 
     /**
     * Dumps the current list of compatibility config information.

services/core/java/com/android/server/compat/PlatformCompat.java

@@ -23,6 +23,7 @@ import android.util.Slog;
 import android.util.StatsLog;
 
 import com.android.internal.compat.ChangeReporter;
+import com.android.internal.compat.CompatibilityChangeConfig;
 import com.android.internal.compat.IPlatformCompat;
 import com.android.internal.util.DumpUtils;
 
@@ -99,6 +100,17 @@ public class PlatformCompat extends IPlatformCompat.Stub {
         return enabled;
     }
 
+    @Override
+    public void setOverrides(CompatibilityChangeConfig overrides, String packageName) {
+        CompatConfig.get().addOverrides(overrides, packageName);
+    }
+
+    @Override
+    public void clearOverrides(String packageName) {
+        CompatConfig config = CompatConfig.get();
+        config.removePackageOverrides(packageName);
+    }
+
     @Override
     protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         if (!DumpUtils.checkDumpAndUsageStatsPermission(mContext, "platform_compat", pw)) return;