Java tutorial
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We also recommend that a * file or class name and description of purpose be included on the * same "printed page" as the copyright notice for easier * identification within third-party archives. * * Copyright 2016 Alibaba Group * * 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.taobao.android.builder.tasks.app.databinding; import com.android.build.gradle.AndroidConfig; import com.android.build.gradle.internal.api.AppVariantContext; import com.android.build.gradle.internal.api.AppVariantOutputContext; import com.android.build.gradle.internal.core.GradleVariantConfiguration; import com.android.build.gradle.internal.tasks.BaseTask; import com.android.build.gradle.internal.variant.ApkVariantOutputData; import com.android.build.gradle.internal.variant.BaseVariantOutputData; import com.taobao.android.builder.AtlasBuildContext; import com.taobao.android.builder.dependency.AtlasDependencyTree; import com.taobao.android.builder.dependency.model.AwbBundle; import com.taobao.android.builder.tasks.manager.MtlBaseTaskAction; import com.taobao.android.builder.tools.concurrent.ExecutorServicesHelper; import com.taobao.android.builder.tools.manifest.ManifestFileUtils; import com.taobao.android.builder.tools.manifest.ManifestHelper; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOUtils; import org.gradle.api.GradleException; import org.gradle.api.tasks.TaskAction; import org.objectweb.asm.*; import org.objectweb.asm.commons.RemappingClassAdapter; import org.objectweb.asm.commons.SimpleRemapper; import java.io.File; import java.io.FileFilter; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import java.util.concurrent.ExecutionException; public class DataBindingRenameTask extends BaseTask { static final String taskName = "DataBindingRenameTask"; private AndroidConfig androidConfig; private AppVariantContext appVariantContext; private AppVariantOutputContext appVariantOutputContext; private GradleVariantConfiguration config; private ApkVariantOutputData variantOutputData; /** * ?so */ @TaskAction void createAwbPackages() throws ExecutionException, InterruptedException { AtlasDependencyTree atlasDependencyTree = AtlasBuildContext.androidDependencyTrees.get(getVariantName()); if (null == atlasDependencyTree) { return; } ExecutorServicesHelper executorServicesHelper = new ExecutorServicesHelper(taskName, getLogger(), 0); List<Runnable> runnables = new ArrayList<>(); for (final AwbBundle awbBundle : atlasDependencyTree.getAwbBundles()) { runnables.add(new Runnable() { @Override public void run() { try { File dataBindingClazzFolder = appVariantOutputContext.getVariantContext() .getJAwbavaOutputDir(awbBundle); String packageName = ManifestFileUtils .getPackage(ManifestHelper.getOrgManifestFile(awbBundle.getAndroidLibrary())); String appName = appVariantContext.getVariantConfiguration().getOriginalApplicationId(); //? File dataMapperClazz = new File(dataBindingClazzFolder, "android/databinding/DataBinderMapper.class"); if (!dataMapperClazz.exists()) { throw new GradleException("missing datamapper class"); } FileInputStream fileInputStream = new FileInputStream(dataMapperClazz); ClassReader in1 = new ClassReader(fileInputStream); ClassWriter cw = new ClassWriter(0); Map<String, String> reMapping = new HashMap(); reMapping.put(appName.replace(".", "/") + "/BR", packageName.replace(".", "/") + "/BR"); RemappingClassAdapter remappingClassAdapter = new RemappingClassAdapter(cw, new SimpleRemapper(reMapping)); in1.accept(remappingClassAdapter, 8); ClassReader in2 = new ClassReader(cw.toByteArray()); ClassWriter cw2 = new ClassWriter(0); Set<String> renames = new HashSet<String>(); renames.add("android/databinding/DataBinderMapper"); in2.accept( new ClassRenamer(cw2, renames, packageName.replace(".", "/") + "/DataBinderMapper"), 8); File destClass = new File(dataBindingClazzFolder, packageName.replace(".", "/") + "/DataBinderMapper.class"); destClass.getParentFile().mkdirs(); FileOutputStream fileOutputStream = new FileOutputStream(destClass); fileOutputStream.write(cw2.toByteArray()); IOUtils.closeQuietly(fileOutputStream); IOUtils.closeQuietly(fileInputStream); FileUtils.deleteDirectory(new File(dataBindingClazzFolder, "android/databinding")); FileUtils.deleteDirectory(new File(dataBindingClazzFolder, "com/android/databinding")); File appDir = new File(dataBindingClazzFolder, appName.replace(".", "/")); if (appDir.exists()) { File[] files = appDir.listFiles(new FileFilter() { @Override public boolean accept(File pathname) { return pathname.isFile() && !pathname.isDirectory(); } }); for (File tmp : files) { FileUtils.forceDelete(tmp); } } } catch (Throwable e) { e.printStackTrace(); throw new GradleException("package awb failed"); } } }); } executorServicesHelper.execute(runnables); } public static class ConfigAction extends MtlBaseTaskAction<DataBindingRenameTask> { private AppVariantContext appVariantContext; public ConfigAction(AppVariantContext appVariantContext, BaseVariantOutputData baseVariantOutputData) { super(appVariantContext, baseVariantOutputData); this.appVariantContext = appVariantContext; } @Override public String getName() { return scope.getTaskName(taskName); } @Override public Class<DataBindingRenameTask> getType() { return DataBindingRenameTask.class; } @Override public void execute(DataBindingRenameTask packageAwbsTask) { super.execute(packageAwbsTask); packageAwbsTask.androidConfig = appVariantContext.getAppExtension(); packageAwbsTask.appVariantContext = appVariantContext; packageAwbsTask.appVariantOutputContext = getAppVariantOutputContext(); packageAwbsTask.config = scope.getVariantScope().getVariantConfiguration(); packageAwbsTask.variantOutputData = (ApkVariantOutputData) scope.getVariantOutputData(); } } class ClassRenamer extends ClassVisitor implements Opcodes { private Set oldNames; private final String newName; public ClassRenamer(ClassVisitor cv, Set oldNames, String newName) { super(ASM4, cv); this.oldNames = oldNames; this.newName = newName; } @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { oldNames.add(name); cv.visit(version, ACC_PUBLIC, newName, signature, superName, interfaces); } @Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { MethodVisitor mv = cv.visitMethod(access, name, desc, fix(signature), exceptions); if (mv != null && (access & ACC_ABSTRACT) == 0) { mv = new MethodRenamer(mv); } return mv; } class MethodRenamer extends MethodVisitor { public MethodRenamer(final MethodVisitor mv) { super(ASM4, mv); } @Override public void visitTypeInsn(int i, String s) { if (oldNames.contains(s)) { s = newName; } mv.visitTypeInsn(i, s); } @Override public void visitFieldInsn(int opcode, String owner, String name, String desc) { if (oldNames.contains(owner)) { mv.visitFieldInsn(opcode, newName, name, fix(desc)); } else { mv.visitFieldInsn(opcode, owner, name, fix(desc)); } } public void visitMethodInsn(int opcode, String owner, String name, String desc) { if (oldNames.contains(owner)) { mv.visitMethodInsn(opcode, newName, name, fix(desc)); } else { mv.visitMethodInsn(opcode, owner, name, fix(desc)); } } } private String fix(String s) { if (s != null) { Iterator it = oldNames.iterator(); String name; while (it.hasNext()) { name = (String) it.next(); if (s.indexOf(name) != -1) { s = s.replaceAll(name, newName); } } } return s; } } }