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/*
* Copyright (C) 2015 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.databinding.tool.util;
import android.databinding.annotationprocessor.ProcessExpressions;
import android.databinding.tool.Context;
import android.databinding.tool.DataBindingBuilder;
import android.databinding.tool.DataBindingCompilerArgs;
import com.android.annotations.Nullable;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.filefilter.TrueFileFilter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamClass;
import java.io.OutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* A utility class that helps adding build specific objects to the jar file
* and their extraction later on.
*/
public class GenerationalClassUtil {
private List[] mCache = null;
@Nullable
private List<File> mInputDirs;
@Nullable
private File mIncrementalOutDir;
private ExtensionFilter[] mEnabledExtensions;
public static GenerationalClassUtil create(DataBindingCompilerArgs args) {
return new GenerationalClassUtil(args);
}
public GenerationalClassUtil(File inputFolder, ExtensionFilter... extensions) {
if (inputFolder == null || !inputFolder.exists()) {
L.e("Invalid input folder " + inputFolder);
}
mEnabledExtensions = extensions;
mIncrementalOutDir = null;
mInputDirs = Collections.singletonList(inputFolder);
}
private GenerationalClassUtil(DataBindingCompilerArgs args) {
if (args.isEnableV2()) {
mEnabledExtensions = new ExtensionFilter[]{ExtensionFilter.BR,
ExtensionFilter.SETTER_STORE};
} else {
mEnabledExtensions = new ExtensionFilter[]{ExtensionFilter.BR, ExtensionFilter.LAYOUT,
ExtensionFilter.SETTER_STORE};
}
if (StringUtils.isNotBlank(args.getAarOutFolder())) {
mIncrementalOutDir = new File(args.getAarOutFolder(),
DataBindingBuilder.INCREMENTAL_BIN_AAR_DIR);
} else {
mIncrementalOutDir = null;
}
mInputDirs = new ArrayList<>();
if (StringUtils.isNotBlank(args.getBuildFolder())) {
mInputDirs.add(new File(args.getBuildFolder(),
DataBindingBuilder.ARTIFACT_FILES_DIR_FROM_LIBS));
}
}
public static GenerationalClassUtil get() {
return Context.getGenerationalClassUtil();
}
public <T extends Serializable> List<T> loadObjects(ExtensionFilter filter) {
if (mCache == null) {
buildCache();
}
List result = mCache[filter.ordinal()];
Preconditions.checkNotNull(result, "Invalid filter " + filter);
//noinspection unchecked
return result;
}
private void buildCache() {
L.d("building generational class cache");
mCache = new List[ExtensionFilter.values().length];
for (ExtensionFilter filter : mEnabledExtensions) {
mCache[filter.ordinal()] = new ArrayList();
}
loadFromBuildInfo();
}
/**
* To compile with jack, included jars are converted to an intermediate format which does not
* keep .bin files.
* <p>
* To workaround this issue, we have a gradle transform that extracts bin files from jars into
* a folder before they are sent to jack. The processor later checks the folder and parses
* the .bin files.
* <p>
* This is a backward compatibility measure and should eventually be phased out after we move
* to an aar based information retrieval model.
*/
private void loadFromBuildInfo() {
mInputDirs.forEach(this::loadFromDirectory);
}
private void loadFromDirectory(File directory) {
if (directory == null || !directory.canRead() || !directory.isDirectory()) {
return;
}
for (File file : FileUtils.listFiles(directory, TrueFileFilter.INSTANCE,
TrueFileFilter.INSTANCE)) {
for (ExtensionFilter filter : mEnabledExtensions) {
if (filter.accept(file.getName())) {
InputStream inputStream = null;
try {
inputStream = FileUtils.openInputStream(file);
Serializable item = fromInputStream(inputStream);
if (item != null) {
//noinspection unchecked
mCache[filter.ordinal()].add(item);
L.d("loaded item %s from file", item);
}
} catch (IOException e) {
L.e(e, "Could not merge in Bindables from %s", file.getAbsolutePath());
} catch (ClassNotFoundException e) {
L.e(e, "Could not read Binding properties intermediate file. %s",
file.getAbsolutePath());
} finally {
IOUtils.closeQuietly(inputStream);
}
}
}
}
}
private Serializable fromInputStream(InputStream inputStream)
throws IOException, ClassNotFoundException {
ObjectInputStream in = new IgnoreSerialIdObjectInputStream(inputStream);
return (Serializable) in.readObject();
}
public void writeIntermediateFile(String packageName, String fileName,
Serializable object) {
ObjectOutputStream oos = null;
OutputStream ios = null;
try {
try {
Preconditions.checkNotNull(mIncrementalOutDir, "incremental out directory should be"
+ " set to aar output directory.");
//noinspection ResultOfMethodCallIgnored
mIncrementalOutDir.mkdirs();
File out = new File(mIncrementalOutDir, packageName + "-" + fileName);
ios = new FileOutputStream(out);
oos = new ObjectOutputStream(ios);
oos.writeObject(object);
oos.close();
L.d("wrote intermediate bindable file %s %s", packageName, fileName);
} catch (IOException e) {
L.e(e, "Could not write to intermediate file: %s", fileName);
} finally {
IOUtils.closeQuietly(oos);
IOUtils.closeQuietly(ios);
}
} catch (LoggedErrorException e) {
// This will be logged later, so don't worry about it
}
}
public enum ExtensionFilter {
BR("-br.bin"),
LAYOUT("-layoutinfo.bin"),
SETTER_STORE("-setter_store.bin");
private final String mExtension;
ExtensionFilter(String extension) {
mExtension = extension;
}
public boolean accept(String entryName) {
return entryName.endsWith(mExtension);
}
public String getExtension() {
return mExtension;
}
}
private static class IgnoreSerialIdObjectInputStream extends ObjectInputStream {
public IgnoreSerialIdObjectInputStream(InputStream in) throws IOException {
super(in);
}
@Override
protected ObjectStreamClass readClassDescriptor()
throws IOException, ClassNotFoundException {
ObjectStreamClass original = super.readClassDescriptor();
// hack for https://issuetracker.google.com/issues/71057619
if (ProcessExpressions.IntermediateV1.class.getName().equals(original.getName())) {
return ObjectStreamClass.lookup(ProcessExpressions.IntermediateV1.class);
}
return original;
}
}
}
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