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/*
* Copyright (C) 2018 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.pm;
import android.annotation.NonNull;
import android.annotation.Nullable;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.ArrayUtils;
import java.util.ArrayList;
/**
* Base for classes that update a {@link PackageParser.Package}'s shared libraries.
*
* @hide
*/
@VisibleForTesting
public abstract class PackageSharedLibraryUpdater {
/**
* Update the package's shared libraries.
*
* @param pkg the package to update.
*/
public abstract void updatePackage(PackageParser.Package pkg);
static void removeLibrary(PackageParser.Package pkg, String libraryName) {
pkg.usesLibraries = ArrayUtils.remove(pkg.usesLibraries, libraryName);
pkg.usesOptionalLibraries =
ArrayUtils.remove(pkg.usesOptionalLibraries, libraryName);
}
static @NonNull
<T> ArrayList<T> prefix(@Nullable ArrayList<T> cur, T val) {
if (cur == null) {
cur = new ArrayList<>();
}
cur.add(0, val);
return cur;
}
private static boolean isLibraryPresent(ArrayList<String> usesLibraries,
ArrayList<String> usesOptionalLibraries, String apacheHttpLegacy) {
return ArrayUtils.contains(usesLibraries, apacheHttpLegacy)
|| ArrayUtils.contains(usesOptionalLibraries, apacheHttpLegacy);
}
/**
* Add an implicit dependency.
*
* <p>If the package has an existing dependency on {@code existingLibrary} then prefix it with
* the {@code implicitDependency} if it is not already in the list of libraries.
*
* @param pkg the {@link PackageParser.Package} to update.
* @param existingLibrary the existing library.
* @param implicitDependency the implicit dependency to add
*/
void prefixImplicitDependency(PackageParser.Package pkg, String existingLibrary,
String implicitDependency) {
ArrayList<String> usesLibraries = pkg.usesLibraries;
ArrayList<String> usesOptionalLibraries = pkg.usesOptionalLibraries;
if (!isLibraryPresent(usesLibraries, usesOptionalLibraries, implicitDependency)) {
if (ArrayUtils.contains(usesLibraries, existingLibrary)) {
prefix(usesLibraries, implicitDependency);
} else if (ArrayUtils.contains(usesOptionalLibraries, existingLibrary)) {
prefix(usesOptionalLibraries, implicitDependency);
}
pkg.usesLibraries = usesLibraries;
pkg.usesOptionalLibraries = usesOptionalLibraries;
}
}
void prefixRequiredLibrary(PackageParser.Package pkg, String libraryName) {
ArrayList<String> usesLibraries = pkg.usesLibraries;
ArrayList<String> usesOptionalLibraries = pkg.usesOptionalLibraries;
boolean alreadyPresent = isLibraryPresent(
usesLibraries, usesOptionalLibraries, libraryName);
if (!alreadyPresent) {
usesLibraries = prefix(usesLibraries, libraryName);
pkg.usesLibraries = usesLibraries;
}
}
}
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