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/*
* Copyright (C) 2021 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 android.content.om;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.os.FabricatedOverlayInternal;
import android.os.FabricatedOverlayInternalEntry;
import android.text.TextUtils;
import com.android.internal.util.Preconditions;
import java.util.ArrayList;
/**
* Fabricated Runtime Resource Overlays (FRROs) are overlays generated ar runtime.
*
* Fabricated overlays are enabled, disabled, and reordered just like normal overlays. The
* overlayable policies a fabricated overlay fulfills are the same policies the creator of the
* overlay fulfill. For example, a fabricated overlay created by a platform signed package on the
* system partition would fulfil the {@code system} and {@code signature} policies.
*
* The owner of a fabricated overlay is the UID that created it. Overlays commit to the overlay
* manager persist across reboots. When the UID is uninstalled, its fabricated overlays are wiped.
*
* Processes with {@link Android.Manifest.permission.CHANGE_OVERLAY_PACKAGES} can manage normal
* overlays and fabricated overlays.
* @hide
*/
public class FabricatedOverlay {
/** Retrieves the identifier for this fabricated overlay. */
public OverlayIdentifier getIdentifier() {
return new OverlayIdentifier(
mOverlay.packageName, TextUtils.nullIfEmpty(mOverlay.overlayName));
}
public static class Builder {
private final String mOwningPackage;
private final String mName;
private final String mTargetPackage;
private String mTargetOverlayable = "";
private final ArrayList<FabricatedOverlayInternalEntry> mEntries = new ArrayList<>();
/**
* Constructs a build for a fabricated overlay.
*
* @param owningPackage the name of the package that owns the fabricated overlay (must
* be a package name of this UID).
* @param name a name used to uniquely identify the fabricated overlay owned by
* {@param owningPackageName}
* @param targetPackage the name of the package to overlay
*/
public Builder(@NonNull String owningPackage, @NonNull String name,
@NonNull String targetPackage) {
Preconditions.checkStringNotEmpty(owningPackage,
"'owningPackage' must not be empty nor null");
Preconditions.checkStringNotEmpty(name,
"'name'' must not be empty nor null");
Preconditions.checkStringNotEmpty(targetPackage,
"'targetPackage' must not be empty nor null");
mOwningPackage = owningPackage;
mName = name;
mTargetPackage = targetPackage;
}
/**
* Sets the name of the overlayable resources to overlay (can be null).
*/
public Builder setTargetOverlayable(@Nullable String targetOverlayable) {
mTargetOverlayable = TextUtils.emptyIfNull(targetOverlayable);
return this;
}
/**
* Sets the value of
*
* @param resourceName name of the target resource to overlay (in the form
* [package]:type/entry)
* @param dataType the data type of the new value
* @param value the unsigned 32 bit integer representing the new value
*
* @see android.util.TypedValue#type
*/
public Builder setResourceValue(@NonNull String resourceName, int dataType, int value) {
final FabricatedOverlayInternalEntry entry = new FabricatedOverlayInternalEntry();
entry.resourceName = resourceName;
entry.dataType = dataType;
entry.data = value;
mEntries.add(entry);
return this;
}
/** Builds an immutable fabricated overlay. */
public FabricatedOverlay build() {
final FabricatedOverlayInternal overlay = new FabricatedOverlayInternal();
overlay.packageName = mOwningPackage;
overlay.overlayName = mName;
overlay.targetPackageName = mTargetPackage;
overlay.targetOverlayable = mTargetOverlayable;
overlay.entries = new ArrayList<>();
overlay.entries.addAll(mEntries);
return new FabricatedOverlay(overlay);
}
}
final FabricatedOverlayInternal mOverlay;
private FabricatedOverlay(FabricatedOverlayInternal overlay) {
mOverlay = overlay;
}
}
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