From 22e85fc3ff3d85e8a30fc42438ccb942fc5d80df Mon Sep 17 00:00:00 2001
From: Ben Gruver <bgruv@google.com>
Date: Sun, 16 Oct 2016 13:43:34 -0700
Subject: [PATCH] Add a --classes option for disassemble/deodex commands

---
 .../src/main/java/org/jf/baksmali/Baksmali.java  | 16 ++++++++++++++++
 .../java/org/jf/baksmali/DisassembleCommand.java |  7 ++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/baksmali/src/main/java/org/jf/baksmali/Baksmali.java b/baksmali/src/main/java/org/jf/baksmali/Baksmali.java
index a2fc4112..1c0231b5 100644
--- a/baksmali/src/main/java/org/jf/baksmali/Baksmali.java
+++ b/baksmali/src/main/java/org/jf/baksmali/Baksmali.java
@@ -36,12 +36,20 @@ import org.jf.dexlib2.iface.DexFile;
 import org.jf.util.ClassFileNameHandler;
 import org.jf.util.IndentingWriter;
 
+import javax.annotation.Nullable;
 import java.io.*;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.*;
 
 public class Baksmali {
     public static boolean disassembleDexFile(DexFile dexFile, File outputDir, int jobs, final BaksmaliOptions options) {
+        return disassembleDexFile(dexFile, outputDir, jobs, options, null);
+    }
+
+    public static boolean disassembleDexFile(DexFile dexFile, File outputDir, int jobs, final BaksmaliOptions options,
+                                             @Nullable List<String> classes) {
 
         //sort the classes, so that if we're on a case-insensitive file system and need to handle classes with file
         //name collisions, then we'll use the same name for each class, if the dex file goes through multiple
@@ -54,7 +62,15 @@ public class Baksmali {
         ExecutorService executor = Executors.newFixedThreadPool(jobs);
         List<Future<Boolean>> tasks = Lists.newArrayList();
 
+        Set<String> classSet = null;
+        if (classes != null) {
+            classSet = new HashSet<String>(classes);
+        }
+
         for (final ClassDef classDef: classDefs) {
+            if (classSet != null && !classSet.contains(classDef.getType())) {
+                continue;
+            }
             tasks.add(executor.submit(new Callable<Boolean>() {
                 @Override public Boolean call() throws Exception {
                     return disassembleClass(classDef, fileNameHandler, options);
diff --git a/baksmali/src/main/java/org/jf/baksmali/DisassembleCommand.java b/baksmali/src/main/java/org/jf/baksmali/DisassembleCommand.java
index 1ce49523..06d7c967 100644
--- a/baksmali/src/main/java/org/jf/baksmali/DisassembleCommand.java
+++ b/baksmali/src/main/java/org/jf/baksmali/DisassembleCommand.java
@@ -133,6 +133,11 @@ public class DisassembleCommand extends DexInputCommand {
                     "fields from the current class.")
     private boolean implicitReferences = false;
 
+    @Parameter(names = "--classes",
+            description = "A comma separated list of classes. Only disassemble these classes")
+    @ExtendedParameter(argumentNames = "classes")
+    private List<String> classes = null;
+
     public DisassembleCommand(@Nonnull List<JCommander> commandAncestors) {
         super(commandAncestors);
     }
@@ -170,7 +175,7 @@ public class DisassembleCommand extends DexInputCommand {
             analysisArguments.classPathDirectories = Lists.newArrayList(inputFile.getAbsoluteFile().getParent());
         }
 
-        if (!Baksmali.disassembleDexFile(dexFile, outputDirectoryFile, jobs, getOptions())) {
+        if (!Baksmali.disassembleDexFile(dexFile, outputDirectoryFile, jobs, getOptions(), classes)) {
             System.exit(-1);
         }
     }