Java tutorial
/* * * * Apache License * Version 2.0, January 2004 * http://www.apache.org/licenses/ * * TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION * * 1. Definitions. * * "License" shall mean the terms and conditions for use, reproduction, * and distribution as defined by Sections 1 through 9 of this document. * * "Licensor" shall mean the copyright owner or entity authorized by * the copyright owner that is granting the License. * * "Legal Entity" shall mean the union of the acting entity and all * other entities that control, are controlled by, or are under common * control with that entity. For the purposes of this definition, * "control" means (i) the power, direct or indirect, to cause the * direction or management of such entity, whether by contract or * otherwise, or (ii) ownership of fifty percent (50%) or more of the * outstanding shares, or (iii) beneficial ownership of such entity. * * "You" (or "Your") shall mean an individual or Legal Entity * exercising permissions granted by this License. * * "Source" form shall mean the preferred form for making modifications, * including but not limited to software source code, documentation * source, and configuration files. * * "Object" form shall mean any form resulting from mechanical * transformation or translation of a Source form, including but * not limited to compiled object code, generated documentation, * and conversions to other media types. * * "Work" shall mean the work of authorship, whether in Source or * Object form, made available under the License, as indicated by a * copyright notice that is included in or attached to the work * (an example is provided in the Appendix below). * * "Derivative Works" shall mean any work, whether in Source or Object * form, that is based on (or derived from) the Work and for which the * editorial revisions, annotations, elaborations, or other modifications * represent, as a whole, an original work of authorship. For the purposes * of this License, Derivative Works shall not include works that remain * separable from, or merely link (or bind by name) to the interfaces of, * the Work and Derivative Works thereof. * * "Contribution" shall mean any work of authorship, including * the original version of the Work and any modifications or additions * to that Work or Derivative Works thereof, that is intentionally * submitted to Licensor for inclusion in the Work by the copyright owner * or by an individual or Legal Entity authorized to submit on behalf of * the copyright owner. For the purposes of this definition, "submitted" * means any form of electronic, verbal, or written communication sent * to the Licensor or its representatives, including but not limited to * communication on electronic mailing lists, source code control systems, * and issue tracking systems that are managed by, or on behalf of, the * Licensor for the purpose of discussing and improving the Work, but * excluding communication that is conspicuously marked or otherwise * designated in writing by the copyright owner as "Not a Contribution." * * "Contributor" shall mean Licensor and any individual or Legal Entity * on behalf of whom a Contribution has been received by Licensor and * subsequently incorporated within the Work. * * 2. Grant of Copyright License. Subject to the terms and conditions of * this License, each Contributor hereby grants to You a perpetual, * worldwide, non-exclusive, no-charge, royalty-free, irrevocable * copyright license to reproduce, prepare Derivative Works of, * publicly display, publicly perform, sublicense, and distribute the * Work and such Derivative Works in Source or Object form. * * 3. Grant of Patent License. Subject to the terms and conditions of * this License, each Contributor hereby grants to You a perpetual, * worldwide, non-exclusive, no-charge, royalty-free, irrevocable * (except as stated in this section) patent license to make, have made, * use, offer to sell, sell, import, and otherwise transfer the Work, * where such license applies only to those patent claims licensable * by such Contributor that are necessarily infringed by their * Contribution(s) alone or by combination of their Contribution(s) * with the Work to which such Contribution(s) was submitted. If You * institute patent litigation against any entity (including a * cross-claim or counterclaim in a lawsuit) alleging that the Work * or a Contribution incorporated within the Work constitutes direct * or contributory patent infringement, then any patent licenses * granted to You under this License for that Work shall terminate * as of the date such litigation is filed. * * 4. Redistribution. You may reproduce and distribute copies of the * Work or Derivative Works thereof in any medium, with or without * modifications, and in Source or Object form, provided that You * meet the following conditions: * * (a) You must give any other recipients of the Work or * Derivative Works a copy of this License; and * * (b) You must cause any modified files to carry prominent notices * stating that You changed the files; and * * (c) You must retain, in the Source form of any Derivative Works * that You distribute, all copyright, patent, trademark, and * attribution notices from the Source form of the Work, * excluding those notices that do not pertain to any part of * the Derivative Works; and * * (d) If the Work includes a "NOTICE" text file as part of its * distribution, then any Derivative Works that You distribute must * include a readable copy of the attribution notices contained * within such NOTICE file, excluding those notices that do not * pertain to any part of the Derivative Works, in at least one * of the following places: within a NOTICE text file distributed * as part of the Derivative Works; within the Source form or * documentation, if provided along with the Derivative Works; or, * within a display generated by the Derivative Works, if and * wherever such third-party notices normally appear. The contents * of the NOTICE file are for informational purposes only and * do not modify the License. You may add Your own attribution * notices within Derivative Works that You distribute, alongside * or as an addendum to the NOTICE text from the Work, provided * that such additional attribution notices cannot be construed * as modifying the License. * * You may add Your own copyright statement to Your modifications and * may provide additional or different license terms and conditions * for use, reproduction, or distribution of Your modifications, or * for any such Derivative Works as a whole, provided Your use, * reproduction, and distribution of the Work otherwise complies with * the conditions stated in this License. * * 5. Submission of Contributions. Unless You explicitly state otherwise, * any Contribution intentionally submitted for inclusion in the Work * by You to the Licensor shall be under the terms and conditions of * this License, without any additional terms or conditions. * Notwithstanding the above, nothing herein shall supersede or modify * the terms of any separate license agreement you may have executed * with Licensor regarding such Contributions. * * 6. Trademarks. This License does not grant permission to use the trade * names, trademarks, service marks, or product names of the Licensor, * except as required for reasonable and customary use in describing the * origin of the Work and reproducing the content of the NOTICE file. * * 7. Disclaimer of Warranty. Unless required by applicable law or * agreed to in writing, Licensor provides the Work (and each * Contributor provides its Contributions) on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied, including, without limitation, any warranties or conditions * of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A * PARTICULAR PURPOSE. You are solely responsible for determining the * appropriateness of using or redistributing the Work and assume any * risks associated with Your exercise of permissions under this License. * * 8. Limitation of Liability. In no event and under no legal theory, * whether in tort (including negligence), contract, or otherwise, * unless required by applicable law (such as deliberate and grossly * negligent acts) or agreed to in writing, shall any Contributor be * liable to You for damages, including any direct, indirect, special, * incidental, or consequential damages of any character arising as a * result of this License or out of the use or inability to use the * Work (including but not limited to damages for loss of goodwill, * work stoppage, computer failure or malfunction, or any and all * other commercial damages or losses), even if such Contributor * has been advised of the possibility of such damages. * * 9. Accepting Warranty or Additional Liability. While redistributing * the Work or Derivative Works thereof, You may choose to offer, * and charge a fee for, acceptance of support, warranty, indemnity, * or other liability obligations and/or rights consistent with this * License. However, in accepting such obligations, You may act only * on Your own behalf and on Your sole responsibility, not on behalf * of any other Contributor, and only if You agree to indemnify, * defend, and hold each Contributor harmless for any liability * incurred by, or claims asserted against, such Contributor by reason * of your accepting any such warranty or additional liability. * * END OF TERMS AND CONDITIONS * * APPENDIX: How to apply the Apache License to your work. * * To apply the Apache License to your work, attach the following * boilerplate notice, with the fields enclosed by brackets "[]" * replaced with your own identifying information. (Don't include * the brackets!) The text should be enclosed in the appropriate * comment syntax for the file format. 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.differ.dex; /* * * * Apache License * Version 2.0, January 2004 * http://www.apache.org/licenses/ * * TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION * * 1. Definitions. * * "License" shall mean the terms and conditions for use, reproduction, * and distribution as defined by Sections 1 through 9 of this document. * * "Licensor" shall mean the copyright owner or entity authorized by * the copyright owner that is granting the License. * * "Legal Entity" shall mean the union of the acting entity and all * other entities that control, are controlled by, or are under common * control with that entity. For the purposes of this definition, * "control" means (i) the power, direct or indirect, to cause the * direction or management of such entity, whether by contract or * otherwise, or (ii) ownership of fifty percent (50%) or more of the * outstanding shares, or (iii) beneficial ownership of such entity. * * "You" (or "Your") shall mean an individual or Legal Entity * exercising permissions granted by this License. * * "Source" form shall mean the preferred form for making modifications, * including but not limited to software source code, documentation * source, and configuration files. * * "Object" form shall mean any form resulting from mechanical * transformation or translation of a Source form, including but * not limited to compiled object code, generated documentation, * and conversions to other media types. * * "Work" shall mean the work of authorship, whether in Source or * Object form, made available under the License, as indicated by a * copyright notice that is included in or attached to the work * (an example is provided in the Appendix below). * * "Derivative Works" shall mean any work, whether in Source or Object * form, that is based on (or derived from) the Work and for which the * editorial revisions, annotations, elaborations, or other modifications * represent, as a whole, an original work of authorship. For the purposes * of this License, Derivative Works shall not include works that remain * separable from, or merely link (or bind by name) to the interfaces of, * the Work and Derivative Works thereof. * * "Contribution" shall mean any work of authorship, including * the original version of the Work and any modifications or additions * to that Work or Derivative Works thereof, that is intentionally * submitted to Licensor for inclusion in the Work by the copyright owner * or by an individual or Legal Entity authorized to submit on behalf of * the copyright owner. For the purposes of this definition, "submitted" * means any form of electronic, verbal, or written communication sent * to the Licensor or its representatives, including but not limited to * communication on electronic mailing lists, source code control systems, * and issue tracking systems that are managed by, or on behalf of, the * Licensor for the purpose of discussing and improving the Work, but * excluding communication that is conspicuously marked or otherwise * designated in writing by the copyright owner as "Not a Contribution." * * "Contributor" shall mean Licensor and any individual or Legal Entity * on behalf of whom a Contribution has been received by Licensor and * subsequently incorporated within the Work. * * 2. Grant of Copyright License. Subject to the terms and conditions of * this License, each Contributor hereby grants to You a perpetual, * worldwide, non-exclusive, no-charge, royalty-free, irrevocable * copyright license to reproduce, prepare Derivative Works of, * publicly display, publicly perform, sublicense, and distribute the * Work and such Derivative Works in Source or Object form. * * 3. Grant of Patent License. Subject to the terms and conditions of * this License, each Contributor hereby grants to You a perpetual, * worldwide, non-exclusive, no-charge, royalty-free, irrevocable * (except as stated in this section) patent license to make, have made, * use, offer to sell, sell, import, and otherwise transfer the Work, * where such license applies only to those patent claims licensable * by such Contributor that are necessarily infringed by their * Contribution(s) alone or by combination of their Contribution(s) * with the Work to which such Contribution(s) was submitted. If You * institute patent litigation against any entity (including a * cross-claim or counterclaim in a lawsuit) alleging that the Work * or a Contribution incorporated within the Work constitutes direct * or contributory patent infringement, then any patent licenses * granted to You under this License for that Work shall terminate * as of the date such litigation is filed. * * 4. Redistribution. You may reproduce and distribute copies of the * Work or Derivative Works thereof in any medium, with or without * modifications, and in Source or Object form, provided that You * meet the following conditions: * * (a) You must give any other recipients of the Work or * Derivative Works a copy of this License; and * * (b) You must cause any modified files to carry prominent notices * stating that You changed the files; and * * (c) You must retain, in the Source form of any Derivative Works * that You distribute, all copyright, patent, trademark, and * attribution notices from the Source form of the Work, * excluding those notices that do not pertain to any part of * the Derivative Works; and * * (d) If the Work includes a "NOTICE" text file as part of its * distribution, then any Derivative Works that You distribute must * include a readable copy of the attribution notices contained * within such NOTICE file, excluding those notices that do not * pertain to any part of the Derivative Works, in at least one * of the following places: within a NOTICE text file distributed * as part of the Derivative Works; within the Source form or * documentation, if provided along with the Derivative Works; or, * within a display generated by the Derivative Works, if and * wherever such third-party notices normally appear. The contents * of the NOTICE file are for informational purposes only and * do not modify the License. You may add Your own attribution * notices within Derivative Works that You distribute, alongside * or as an addendum to the NOTICE text from the Work, provided * that such additional attribution notices cannot be construed * as modifying the License. * * You may add Your own copyright statement to Your modifications and * may provide additional or different license terms and conditions * for use, reproduction, or distribution of Your modifications, or * for any such Derivative Works as a whole, provided Your use, * reproduction, and distribution of the Work otherwise complies with * the conditions stated in this License. * * 5. Submission of Contributions. Unless You explicitly state otherwise, * any Contribution intentionally submitted for inclusion in the Work * by You to the Licensor shall be under the terms and conditions of * this License, without any additional terms or conditions. * Notwithstanding the above, nothing herein shall supersede or modify * the terms of any separate license agreement you may have executed * with Licensor regarding such Contributions. * * 6. Trademarks. This License does not grant permission to use the trade * names, trademarks, service marks, or product names of the Licensor, * except as required for reasonable and customary use in describing the * origin of the Work and reproducing the content of the NOTICE file. * * 7. Disclaimer of Warranty. Unless required by applicable law or * agreed to in writing, Licensor provides the Work (and each * Contributor provides its Contributions) on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied, including, without limitation, any warranties or conditions * of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A * PARTICULAR PURPOSE. You are solely responsible for determining the * appropriateness of using or redistributing the Work and assume any * risks associated with Your exercise of permissions under this License. * * 8. Limitation of Liability. In no event and under no legal theory, * whether in tort (including negligence), contract, or otherwise, * unless required by applicable law (such as deliberate and grossly * negligent acts) or agreed to in writing, shall any Contributor be * liable to You for damages, including any direct, indirect, special, * incidental, or consequential damages of any character arising as a * result of this License or out of the use or inability to use the * Work (including but not limited to damages for loss of goodwill, * work stoppage, computer failure or malfunction, or any and all * other commercial damages or losses), even if such Contributor * has been advised of the possibility of such damages. * * 9. Accepting Warranty or Additional Liability. While redistributing * the Work or Derivative Works thereof, You may choose to offer, * and charge a fee for, acceptance of support, warranty, indemnity, * or other liability obligations and/or rights consistent with this * License. However, in accepting such obligations, You may act only * on Your own behalf and on Your sole responsibility, not on behalf * of any other Contributor, and only if You agree to indemnify, * defend, and hold each Contributor harmless for any liability * incurred by, or claims asserted against, such Contributor by reason * of your accepting any such warranty or additional liability. * * END OF TERMS AND CONDITIONS * * APPENDIX: How to apply the Apache License to your work. * * To apply the Apache License to your work, attach the following * boilerplate notice, with the fields enclosed by brackets "[]" * replaced with your own identifying information. (Don't include * the brackets!) The text should be enclosed in the appropriate * comment syntax for the file format. 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. * * */ import com.google.common.base.Objects; import com.google.common.collect.Lists; import com.google.common.collect.Maps; import com.google.common.collect.Sets; import com.taobao.android.filter.DexDiffFilter; import com.taobao.android.filter.Filter; import com.taobao.android.object.*; import com.taobao.android.utils.DexCompareUtils; import org.apache.commons.lang3.StringUtils; import org.jf.dexlib2.DexFileFactory; import org.jf.dexlib2.dexbacked.*; import org.jf.dexlib2.iface.value.EncodedValue; import org.jf.dexlib2.util.ReferenceUtil; import javax.annotation.Nullable; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; /** * Dex? * Created by shenghua.nish on 2016-03-09 ?2:10. */ public class DexDiffer { private List<File> baseDexFiles = Lists.newArrayList(); private List<File> newDexFiles = Lists.newArrayList(); private int apiLevel; private Map<String, org.jf.dexlib2.iface.ClassDef> lastBundleClassMap = new HashMap<String, org.jf.dexlib2.iface.ClassDef>(); private DexDiffInfo dexDiffInfo = new DexDiffInfo(); //dex private DexDiffFilter dexDiffFilter; //??? private Filter filter; private Map<String, DexBackedClassDef> baseClassDefMap = new HashMap<String, DexBackedClassDef>(); public DexDiffer(List<File> baseDexFiles, List<File> newDexFiles, int apiLevel) { this.baseDexFiles = baseDexFiles; this.newDexFiles = newDexFiles; this.apiLevel = apiLevel; } public DexDiffer(File baseDex, File newDex, int apiLevel) { baseDexFiles.add(baseDex); newDexFiles.add(newDex); this.apiLevel = apiLevel; } public void setDexDiffFilter(DexDiffFilter dexDiffFilter) { this.dexDiffFilter = dexDiffFilter; } public void setLastBundleClassMap(Map<String, org.jf.dexlib2.iface.ClassDef> map) { this.lastBundleClassMap = map; } public void createFilter(String filterPath) { this.filter = new Filter(filterPath); } /** * ?dexdiff * * @return */ public DexDiffInfo doDiff() throws IOException, PatchException { scanBaseDexFile(); Set<DexBackedClassDef> newDexClassDefs = Sets.newHashSet(); for (File newDexFile : newDexFiles) { DexBackedDexFile newBackedDexFile = DexFileFactory.loadDexFile(newDexFile, apiLevel, true); newDexClassDefs.addAll(newBackedDexFile.getClasses()); dexDiffInfo.setNewClasses(newDexClassDefs); } for (DexBackedClassDef newClassDef : newDexClassDefs) { if (filter != null) { if (filter.isFiltered(newClassDef.getType())) { System.out.println("filter class:" + newClassDef.getType()); continue; } } String className = getDalvikClassName(newClassDef.getType()); DexBackedClassDef baseClassDef = baseClassDefMap.get(className); if (lastBundleClassMap.containsKey(newClassDef.getType())) { System.out.println("overide class:" + className); ClassDiffInfo classDiffInfo = new ClassDiffInfo(); classDiffInfo.setType(DiffType.OVERRIDE); classDiffInfo.setClassDef(baseClassDef); dexDiffInfo.getClassDiffInfoMap().put(className, classDiffInfo); } ClassDiffInfo classDiffInfo = compareClassDef(baseClassDef, newClassDef); if (DiffType.MODIFY.equals(classDiffInfo.getType()) || DiffType.ADD.equals(classDiffInfo.getType())) { dexDiffInfo.getClassDiffInfoMap().put(className, classDiffInfo); } } return dexDiffInfo; } public void dexFilter() throws PatchException { if (dexDiffFilter != null) { dexDiffFilter.filterDex(); } } /** * ??dexdex? */ private void scanBaseDexFile() throws IOException { for (File baseDexFile : baseDexFiles) { DexBackedDexFile baseBackedDexFile = DexFileFactory.loadDexFile(baseDexFile, apiLevel, true); final Set<? extends DexBackedClassDef> baseClassDefs = baseBackedDexFile.getClasses(); dexDiffInfo.setOldClasses(baseClassDefs); for (DexBackedClassDef baseClassDef : baseClassDefs) { String className = getDalvikClassName(baseClassDef.getType()); baseClassDefMap.put(className, baseClassDef); } } } /** * 2? * * @param baseClassDef * @param newClassDef * @return */ private ClassDiffInfo compareClassDef(DexBackedClassDef baseClassDef, DexBackedClassDef newClassDef) throws PatchException { ClassDiffInfo classDiffInfo = new ClassDiffInfo(); String className = null; if (null == baseClassDef && null != newClassDef) { className = getDalvikClassName(newClassDef.getType()); classDiffInfo.setName(className); classDiffInfo.setClassDef(newClassDef); classDiffInfo.setType(DiffType.ADD); } else if (null != baseClassDef && null == newClassDef) { className = getDalvikClassName(baseClassDef.getType()); classDiffInfo.setName(className); classDiffInfo.setClassDef(baseClassDef); classDiffInfo.setType(DiffType.REMOVE); } else {// ?? className = getDalvikClassName(baseClassDef.getType()); classDiffInfo.setName(className); classDiffInfo.setClassDef(newClassDef); boolean classDefModify = compareClassDef_(baseClassDef, newClassDef); boolean methodDefModify = false; boolean fieldDefModify = false; if (classDefModify) { classDiffInfo.setType(DiffType.MODIFY); // 1. ? compareMethods(baseClassDef, newClassDef, classDiffInfo); // 2. ? compareFields(baseClassDef, newClassDef, classDiffInfo); } else { // 1. ? methodDefModify = compareMethods(baseClassDef, newClassDef, classDiffInfo); // 2. ? fieldDefModify = compareFields(baseClassDef, newClassDef, classDiffInfo); if (methodDefModify || fieldDefModify) { classDiffInfo.setType(DiffType.MODIFY); } else { classDiffInfo.setType(DiffType.NONE); } } } return classDiffInfo; } /** * * * @param baseClassDef * @param newClassDef * @return 2?? */ private boolean compareClassDef_(DexBackedClassDef baseClassDef, DexBackedClassDef newClassDef) { if (null == baseClassDef || null == newClassDef) { return false; } if (baseClassDef.equals(newClassDef)) { // access flag? if (baseClassDef.getAccessFlags() != newClassDef.getAccessFlags()) { return true; } // supper class? if (!StringUtils.equals(baseClassDef.getSuperclass(), newClassDef.getSuperclass())) { return true; } // ?? if (!equalsImpl(baseClassDef.getInterfaces(), newClassDef.getInterfaces())) { return true; } // ? if (!equalsImpl(baseClassDef.getAnnotations(), newClassDef.getAnnotations())) { return true; } // ?sourceFile return false; } return true; } private boolean equalsImpl(Set<?> s, @Nullable Object object) { if (s == object) { return true; } else if (object instanceof Set) { Set o = (Set) object; try { return s.size() == o.size() && s.containsAll(o); } catch (NullPointerException var4) { return false; } catch (ClassCastException var5) { return false; } } else { return false; } } /** * dex * FIXME: diff?accssFlag? * * @param baseClassDef * @param newClassDef * @param classDiffInfo */ private boolean compareMethods(DexBackedClassDef baseClassDef, DexBackedClassDef newClassDef, ClassDiffInfo classDiffInfo) throws PatchException { Map<String, DexBackedMethod> baseMethodDefMaps = Maps.newHashMap(); for (DexBackedMethod dexBackedMethod : baseClassDef.getMethods()) { String baseMethodDesc = ReferenceUtil.getMethodDescriptor(dexBackedMethod); baseMethodDefMaps.put(baseMethodDesc, dexBackedMethod); } for (DexBackedMethod newMethod : newClassDef.getMethods()) { MethodDiffInfo methodDiffInfo = new MethodDiffInfo(); String newethodDesc = ReferenceUtil.getMethodDescriptor(newMethod); methodDiffInfo.setBackedMethod(newMethod); DexBackedMethod baseMethod = baseMethodDefMaps.get(newethodDesc); if (null == baseMethod) { methodDiffInfo.setType(DiffType.ADD); classDiffInfo.getModifyMethods().add(methodDiffInfo); continue; } // TODO: access flag? // ,1. DexBackedMethodImplementation newMethodImplementation = newMethod.getImplementation(); DexBackedMethodImplementation baseMethodImplementation = baseMethod.getImplementation(); // 2? if (!DexCompareUtils.compareMethod(newMethodImplementation, baseMethodImplementation)) { methodDiffInfo.setType(DiffType.MODIFY); classDiffInfo.getModifyMethods().add(methodDiffInfo); } baseMethodDefMaps.remove(newethodDesc); } // ? if (baseMethodDefMaps.size() > 0) { for (Map.Entry<String, DexBackedMethod> entry : baseMethodDefMaps.entrySet()) { MethodDiffInfo methodDiffInfo = new MethodDiffInfo(); methodDiffInfo.setType(DiffType.REMOVE); methodDiffInfo.setBackedMethod(entry.getValue()); classDiffInfo.getModifyMethods().add(methodDiffInfo); } } if (classDiffInfo.getModifyMethods().size() > 0) { return true; } return false; } /** * dex * * @param baseClassDef * @param newClassDef * @param classDiffInfo */ private boolean compareFields(DexBackedClassDef baseClassDef, DexBackedClassDef newClassDef, ClassDiffInfo classDiffInfo) throws PatchException { Map<String, DexBackedField> baseFieldMaps = Maps.newHashMap(); for (DexBackedField backedField : baseClassDef.getFields()) { baseFieldMaps.put(ReferenceUtil.getFieldDescriptor(backedField), backedField); } for (DexBackedField newField : newClassDef.getFields()) { FieldDiffInfo fieldDiffInfo = new FieldDiffInfo(); fieldDiffInfo.setBackedField(newField); String fieldDesc = ReferenceUtil.getFieldDescriptor(newField); DexBackedField baseField = baseFieldMaps.get(fieldDesc); if (null == baseField) { fieldDiffInfo.setType(DiffType.ADD); classDiffInfo.getModifyFields().add(fieldDiffInfo); continue; } // access flag? // ? EncodedValue baseInitaValue = baseField.getInitialValue(); EncodedValue newInitaValue = newField.getInitialValue(); if (!Objects.equal(baseInitaValue, newInitaValue)) { fieldDiffInfo.setType(DiffType.MODIFY); classDiffInfo.getModifyFields().add(fieldDiffInfo); baseFieldMaps.remove(fieldDesc); continue; } // Set<? extends DexBackedAnnotation> backedAnnotations = baseField.getAnnotations(); if (!equalsImpl(backedAnnotations, newField.getAnnotations())) { fieldDiffInfo.setType(DiffType.MODIFY); classDiffInfo.getModifyFields().add(fieldDiffInfo); baseFieldMaps.remove(fieldDesc); continue; } //type if (!baseField.getType().equals(newField.getType())) { fieldDiffInfo.setType(DiffType.MODIFY); classDiffInfo.getModifyFields().add(fieldDiffInfo); baseFieldMaps.remove(fieldDesc); continue; } //accessflag if (baseField.getAccessFlags() != newField.getAccessFlags()) { fieldDiffInfo.setType(DiffType.MODIFY); classDiffInfo.getModifyFields().add(fieldDiffInfo); baseFieldMaps.remove(fieldDesc); continue; } baseFieldMaps.remove(fieldDesc); } // ? if (baseFieldMaps.size() > 0) { for (Map.Entry<String, DexBackedField> entry : baseFieldMaps.entrySet()) { FieldDiffInfo fieldDiffInfo = new FieldDiffInfo(); fieldDiffInfo.setBackedField(entry.getValue()); fieldDiffInfo.setType(DiffType.REMOVE); classDiffInfo.getModifyFields().add(fieldDiffInfo); } } if (classDiffInfo.getModifyFields().size() > 0) { return true; } return false; } /** * ?davikclass?? * * @param className * @return */ public static String getDalvikClassName(String className) { if (className.charAt(0) != 'L' || className.charAt(className.length() - 1) != ';') { throw new RuntimeException("Not a valid dalvik class name"); } return StringUtils.replace(className.substring(1, className.length() - 1), "/", "."); } public static void main(String[] args) throws IOException { File dexFile = new File("/Users/shenghua/Downloads/taobao-android.apk/classes.dex"); DexBackedDexFile baseBackedDexFile = DexFileFactory.loadDexFile(dexFile, 19, true); for (DexBackedClassDef classDef : baseBackedDexFile.getClasses()) { System.out.println(classDef.getType()); } } }