create AconfigPackageImpl (afb25696) · Commits · e / os / android_build

tools/aconfig/aconfig_storage_file/srcs/android/aconfig/storage/ByteBufferReader.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -41,6 +41,10 @@ public class ByteBufferReader {
		return this.mByteBuffer.getInt();
		}

		public long readLong() {
		return this.mByteBuffer.getLong();
		}

		public String readString() {
		int length = readInt();
		byte[] bytes = new byte[length];

tools/aconfig/aconfig_storage_file/srcs/android/aconfig/storage/PackageTable.java

+12 −0

Original line number	Diff line number	Diff line
		@@ -124,8 +124,10 @@ public class PackageTable {

		private String mPackageName;
		private int mPackageId;
		private long mPackageFingerprint;
		private int mBooleanStartIndex;
		private int mNextOffset;
		private boolean mHasPackageFingerprint;

		private static Node fromBytes(ByteBufferReader reader, int version) {
		switch (version) {
		@@ -153,9 +155,11 @@ public class PackageTable {
		Node node = new Node();
		node.mPackageName = reader.readString();
		node.mPackageId = reader.readInt();
		node.mPackageFingerprint = reader.readLong();
		node.mBooleanStartIndex = reader.readInt();
		node.mNextOffset = reader.readInt();
		node.mNextOffset = node.mNextOffset == 0 ? -1 : node.mNextOffset;
		node.mHasPackageFingerprint = true;
		return node;
		}

		@@ -189,6 +193,10 @@ public class PackageTable {
		return mPackageId;
		}

		public long getPackageFingerprint() {
		return mPackageFingerprint;
		}

		public int getBooleanStartIndex() {
		return mBooleanStartIndex;
		}
		@@ -196,5 +204,9 @@ public class PackageTable {
		public int getNextOffset() {
		return mNextOffset;
		}

		public boolean hasPackageFingerprint() {
		return mHasPackageFingerprint;
		}
		}
		}

tools/aconfig/aconfig_storage_file/tests/srcs/PackageTableTest.java

+5 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		package android.aconfig.storage.test;

		import static org.junit.Assert.assertEquals;
		import static org.junit.Assert.assertFalse;

		import android.aconfig.storage.FileType;
		import android.aconfig.storage.PackageTable;
		@@ -66,5 +67,9 @@ public class PackageTableTest {
		assertEquals(159, node1.getNextOffset());
		assertEquals(-1, node2.getNextOffset());
		assertEquals(-1, node4.getNextOffset());

		assertFalse(node1.hasPackageFingerprint());
		assertFalse(node2.hasPackageFingerprint());
		assertFalse(node4.hasPackageFingerprint());
		}
		}

tools/aconfig/aconfig_storage_read_api/Android.bp

+4 −0

Original line number	Diff line number	Diff line
		@@ -154,6 +154,8 @@ java_library {
		java_library {
		name: "aconfig_storage_reader_java",
		srcs: [
		"srcs/android/aconfig/storage/AconfigPackageImpl.java",
		"srcs/android/aconfig/storage/StorageFileProvider.java",
		"srcs/android/aconfig/storage/StorageInternalReader.java",
		],
		libs: [
		@@ -175,6 +177,8 @@ java_library {
		java_library {
		name: "aconfig_storage_reader_java_none",
		srcs: [
		"srcs/android/aconfig/storage/AconfigPackageImpl.java",
		"srcs/android/aconfig/storage/StorageFileProvider.java",
		"srcs/android/aconfig/storage/StorageInternalReader.java",
		],
		libs: [

tools/aconfig/aconfig_storage_read_api/srcs/android/aconfig/storage/AconfigPackageImpl.java

0 → 100644

+134 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2024 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.aconfig.storage;

		import android.os.StrictMode;

		import java.nio.file.Path;
		import java.util.ArrayList;
		import java.util.List;

		/** @hide */
		public class AconfigPackageImpl {
		private FlagTable mFlagTable;
		private FlagValueList mFlagValueList;
		private PackageTable.Node mPNode;

		/** @hide */
		public static AconfigPackageImpl load(String packageName, StorageFileProvider fileProvider) {
		AconfigPackageImpl aPackage = new AconfigPackageImpl();
		if (!aPackage.init(null, packageName, fileProvider)) {
		return null;
		}
		return aPackage;
		}

		/** @hide */
		public static AconfigPackageImpl load(
		String packageGroupName, String packageName, StorageFileProvider fileProvider) {
		if (packageGroupName == null) {
		return null;
		}
		AconfigPackageImpl aPackage = new AconfigPackageImpl();
		if (!aPackage.init(packageGroupName, packageName, fileProvider)) {
		return null;
		}
		return aPackage;
		}

		/** @hide */
		public boolean getBooleanFlagValue(String flagName, boolean defaultValue) {
		FlagTable.Node fNode = mFlagTable.get(mPNode.getPackageId(), flagName);
		// no such flag in this package
		if (fNode == null) return defaultValue;
		int index = fNode.getFlagIndex() + mPNode.getBooleanStartIndex();
		return mFlagValueList.getBoolean(index);
		}

		/** @hide */
		public boolean getBooleanFlagValue(int index) {
		return mFlagValueList.getBoolean(index + mPNode.getBooleanStartIndex());
		}

		/** @hide */
		public long getPackageFingerprint() {
		return mPNode.getPackageFingerprint();
		}

		/** @hide */
		public boolean hasPackageFingerprint() {
		return mPNode.hasPackageFingerprint();
		}

		private boolean init(
		String packageGroupName, String packageName, StorageFileProvider fileProvider) {
		StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
		String container = packageGroupName;
		try {
		// for devices don't have new storage directly return
		if (!fileProvider.containerFileExists(null)) {
		return false;
		}
		PackageTable.Node pNode = null;

		if (container == null) {
		PackageTable pTable = null;
		// check if device has flag files on the system partition
		// if the device has then search system partition first
		container = "system";
		if (fileProvider.containerFileExists(container)) {
		pTable = fileProvider.getPackageTable(container);
		pNode = pTable.get(packageName);
		}
		List<Path> mapFiles = new ArrayList<>();
		if (pNode == null) {
		mapFiles = fileProvider.listPackageMapFiles();
		if (mapFiles.isEmpty()) return false;
		}

		for (Path p : mapFiles) {
		pTable = StorageFileProvider.getPackageTable(p);
		pNode = pTable.get(packageName);
		if (pNode != null) {
		container = pTable.getHeader().getContainer();
		break;
		}
		}
		} else {
		pNode = fileProvider.getPackageTable(container).get(packageName);
		}

		if (pNode == null) {
		// for the case package is not found in all container, return instead of throwing
		// error
		return false;
		}

		mFlagTable = fileProvider.getFlagTable(container);
		mFlagValueList = fileProvider.getFlagValueList(container);
		mPNode = pNode;
		} catch (Exception e) {
		throw new AconfigStorageException(
		String.format(
		"cannot load package %s, from container %s", packageName, container),
		e);
		} finally {
		StrictMode.setThreadPolicy(oldPolicy);
		}
		return true;
		}
		}