refactor: Replace to nio & apply CS inspection skips (#3055)

brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java

@@ -41,6 +41,7 @@ import org.xml.sax.SAXException;
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.transform.TransformerException;
 import java.io.*;
+import java.nio.file.Files;
 import java.util.*;
 import java.util.logging.Logger;
 import java.util.regex.Pattern;
@@ -98,6 +99,7 @@ public class Androlib {
                 smaliDir = new File(outDir, SMALI_DIRNAME + "_" + filename.substring(0, filename.indexOf(".")));
             }
             OS.rmdir(smaliDir);
+            //noinspection ResultOfMethodCallIgnored
             smaliDir.mkdirs();
             LOGGER.info("Baksmaling " + filename + "...");
             DexFile dexFile = SmaliDecoder.decode(apkFile, smaliDir, filename, bakDeb, apiLevel);
@@ -236,6 +238,7 @@ public class Androlib {
         LOGGER.info("Copying original files...");
         File originalDir = new File(outDir, "original");
         if (!originalDir.exists()) {
+            //noinspection ResultOfMethodCallIgnored
             originalDir.mkdirs();
         }
 
@@ -313,6 +316,7 @@ public class Androlib {
             outFile = new File(appDir, "dist" + File.separator + (outFileName == null ? "out.apk" : outFileName));
         }
 
+        //noinspection ResultOfMethodCallIgnored
         new File(appDir, APK_DIRNAME).mkdirs();
         File manifest = new File(appDir, "AndroidManifest.xml");
         File manifestOriginal = new File(appDir, "AndroidManifest.xml.orig");
@@ -353,6 +357,7 @@ public class Androlib {
         if (manifest.isFile() && manifest.exists()) {
             try {
                 if (manifestOriginal.exists()) {
+                    //noinspection ResultOfMethodCallIgnored
                     manifestOriginal.delete();
                 }
                 FileUtils.copyFile(manifest, manifestOriginal);
@@ -412,7 +417,7 @@ public class Androlib {
         if (buildOptions.forceBuildAll || isModified(working, stored)) {
             LOGGER.info("Copying " + appDir.toString() + " " + filename + " file...");
             try {
-                BrutIO.copyAndClose(new FileInputStream(working), new FileOutputStream(stored));
+                BrutIO.copyAndClose(Files.newInputStream(working.toPath()), Files.newOutputStream(stored.toPath()));
                 return true;
             } catch (IOException ex) {
                 throw new AndrolibException(ex);
@@ -433,6 +438,7 @@ public class Androlib {
         }
         if (buildOptions.forceBuildAll || isModified(smaliDir, dex)) {
             LOGGER.info("Smaling " + folder + " folder into " + filename + "...");
+            //noinspection ResultOfMethodCallIgnored
             dex.delete();
             SmaliBuilder.build(smaliDir, dex, buildOptions.forceApi > 0 ? buildOptions.forceApi : mMinSdkVersion);
         }
@@ -503,6 +509,7 @@ public class Androlib {
                     File netSecConfOrig = new File(appDir, "res/xml/network_security_config.xml");
                     if (netSecConfOrig.exists()) {
                         LOGGER.info("Replacing existing network_security_config.xml!");
+                        //noinspection ResultOfMethodCallIgnored
                         netSecConfOrig.delete();
                     }
                     ResXmlPatcher.modNetworkSecurityConfig(netSecConfOrig);
@@ -511,7 +518,9 @@ public class Androlib {
                 }
 
                 File apkFile = File.createTempFile("APKTOOL", null);
+                //noinspection ResultOfMethodCallIgnored
                 apkFile.delete();
+                //noinspection ResultOfMethodCallIgnored
                 resourceFile.delete();
 
                 File ninePatch = new File(appDir, "9patch");
@@ -539,6 +548,7 @@ public class Androlib {
                 }
 
                 // delete tmpDir
+                //noinspection ResultOfMethodCallIgnored
                 apkFile.delete();
             }
             return true;
@@ -576,6 +586,7 @@ public class Androlib {
                 LOGGER.info("Building AndroidManifest.xml...");
 
                 File apkFile = File.createTempFile("APKTOOL", null);
+                //noinspection ResultOfMethodCallIgnored
                 apkFile.delete();
 
                 File ninePatch = new File(appDir, "9patch");
@@ -590,6 +601,7 @@ public class Androlib {
                 Directory tmpDir = new ExtFile(apkFile).getDirectory();
                 tmpDir.copyToDir(apkDir, APK_MANIFEST_FILENAMES);
 
+                //noinspection ResultOfMethodCallIgnored
                 apkFile.delete();
             }
             return true;
@@ -668,7 +680,7 @@ public class Androlib {
 
             try (
                     ZipFile inputFile = new ZipFile(tempFile);
-                    ZipOutputStream actualOutput = new ZipOutputStream(new FileOutputStream(outFile))
+                    ZipOutputStream actualOutput = new ZipOutputStream(Files.newOutputStream(outFile.toPath()))
             ) {
                 copyExistingFiles(inputFile, actualOutput);
                 copyUnknownFiles(appDir, actualOutput, files);
@@ -677,6 +689,7 @@ public class Androlib {
             }
 
             // Remove our temporary file.
+            //noinspection ResultOfMethodCallIgnored
             tempFile.delete();
         }
     }
@@ -726,7 +739,7 @@ public class Androlib {
                 newEntry.setMethod(ZipEntry.STORED);
                 newEntry.setSize(inputFile.length());
                 newEntry.setCompressedSize(-1);
-                BufferedInputStream unknownFile = new BufferedInputStream(new FileInputStream(inputFile));
+                BufferedInputStream unknownFile = new BufferedInputStream(Files.newInputStream(inputFile.toPath()));
                 CRC32 crc = BrutIO.calculateCrc(unknownFile);
                 newEntry.setCrc(crc.getValue());
                 unknownFile.close();
@@ -743,10 +756,12 @@ public class Androlib {
     public void buildApk(File appDir, File outApk) throws AndrolibException {
         LOGGER.info("Building apk file...");
         if (outApk.exists()) {
+            //noinspection ResultOfMethodCallIgnored
             outApk.delete();
         } else {
             File outDir = outApk.getParentFile();
             if (outDir != null && !outDir.exists()) {
+                //noinspection ResultOfMethodCallIgnored
                 outDir.mkdirs();
             }
         }

brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java

@@ -28,6 +28,7 @@ import com.android.tools.smali.smali.smaliTreeWalker;
 
 import java.io.*;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 
 public class SmaliMod {
     public static boolean assembleSmaliFile(File smaliFile, DexBuilder dexBuilder, int apiLevel, boolean verboseErrors,
@@ -36,7 +37,7 @@ public class SmaliMod {
         CommonTokenStream tokens;
         smaliFlexLexer lexer;
 
-        InputStream is = new FileInputStream(smaliFile);
+        InputStream is = Files.newInputStream(smaliFile.toPath());
         InputStreamReader reader = new InputStreamReader(is, StandardCharsets.UTF_8);
 
         lexer = new smaliFlexLexer(reader, apiLevel);

brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java

@@ -37,6 +37,7 @@ import org.apache.commons.io.IOUtils;
 import org.xmlpull.v1.XmlSerializer;
 
 import java.io.*;
+import java.nio.file.Files;
 import java.util.*;
 import java.util.logging.Logger;
 import java.util.zip.CRC32;
@@ -185,7 +186,7 @@ final public class AndrolibResources {
 
         attrDecoder.setCurrentPackage(resTable.listMainPackages().iterator().next());
 
-        Directory inApk, in = null, out;
+        Directory inApk, out;
         try {
             inApk = apkFile.getDirectory();
             out = new FileDirectory(outDir);
@@ -433,7 +434,8 @@ final public class AndrolibResources {
         if (buildOptions.doNotCompress != null && !customAapt) {
             // Use custom -e option to avoid limits on commandline length.
             // Can only be used when custom aapt binary is not used.
-            String extensionsFilePath = createDoNotCompressExtensionsFile(buildOptions).getAbsolutePath();
+            String extensionsFilePath =
+                Objects.requireNonNull(createDoNotCompressExtensionsFile(buildOptions)).getAbsolutePath();
             cmd.add("-e");
             cmd.add(extensionsFilePath);
         } else if (buildOptions.doNotCompress != null) {
@@ -555,7 +557,8 @@ final public class AndrolibResources {
         if (buildOptions.doNotCompress != null && !customAapt) {
             // Use custom -e option to avoid limits on commandline length.
             // Can only be used when custom aapt binary is not used.
-            String extensionsFilePath = createDoNotCompressExtensionsFile(buildOptions).getAbsolutePath();
+            String extensionsFilePath =
+                Objects.requireNonNull(createDoNotCompressExtensionsFile(buildOptions)).getAbsolutePath();
             cmd.add("-e");
             cmd.add(extensionsFilePath);
         } else if (buildOptions.doNotCompress != null) {
@@ -801,7 +804,7 @@ final public class AndrolibResources {
 
         if (id == 1) {
             try (InputStream in = getAndroidFrameworkResourcesAsStream();
-                 OutputStream out = new FileOutputStream(apk)) {
+                 OutputStream out = Files.newOutputStream(apk.toPath())) {
                 IOUtils.copy(in, out);
                 return apk;
             } catch (IOException ex) {
@@ -822,12 +825,13 @@ final public class AndrolibResources {
             LOGGER.warning("Can't empty framework directory, no file found at: " + apk.getAbsolutePath());
         } else {
             try {
-                if (apk.exists() && dir.listFiles().length > 1 && ! buildOptions.forceDeleteFramework) {
+                if (apk.exists() && Objects.requireNonNull(dir.listFiles()).length > 1 && ! buildOptions.forceDeleteFramework) {
                     LOGGER.warning("More than default framework detected. Please run command with `--force` parameter to wipe framework directory.");
                 } else {
-                    for (File file : dir.listFiles()) {
+                    for (File file : Objects.requireNonNull(dir.listFiles())) {
                         if (file.isFile() && file.getName().endsWith(".apk")) {
                             LOGGER.info("Removing " + file.getName() + " framework file...");
+                            //noinspection ResultOfMethodCallIgnored
                             file.delete();
                         }
                     }
@@ -879,7 +883,7 @@ final public class AndrolibResources {
                     + (tag == null ? "" : '-' + tag)
                     + ".apk");
 
-            out = new ZipOutputStream(new FileOutputStream(outFile));
+            out = new ZipOutputStream(Files.newOutputStream(outFile.toPath()));
             out.setMethod(ZipOutputStream.STORED);
             CRC32 crc = new CRC32();
             crc.update(data);
@@ -919,8 +923,9 @@ final public class AndrolibResources {
     public void publicizeResources(File arscFile) throws AndrolibException {
         byte[] data = new byte[(int) arscFile.length()];
 
-        try(InputStream in = new FileInputStream(arscFile);
+        try(InputStream in = Files.newInputStream(arscFile.toPath());
-            OutputStream out = new FileOutputStream(arscFile)) {
+            OutputStream out = Files.newOutputStream(arscFile.toPath())) {
+            //noinspection ResultOfMethodCallIgnored
             in.read(data);
             publicizeResources(data);
             out.write(data);
@@ -1034,7 +1039,7 @@ final public class AndrolibResources {
 
     public BuildOptions buildOptions;
 
-    public Map<String, String> mResFileMapping = new HashMap();
+    public Map<String, String> mResFileMapping = new HashMap<>();
 
     // TODO: dirty static hack. I have to refactor decoding mechanisms.
     public static boolean sKeepBroken = false;

brut.apktool/apktool-lib/src/main/java/brut/androlib/res/xml/ResXmlPatcher.java

@@ -168,7 +168,7 @@ public final class ResXmlPatcher {
      * build, thus preventing the application from installing. This is from a bug/error
      * in AOSP where public resources cannot be part of an authorities attribute within
      * a provider tag.
-     *
+     * <p>
      * This finds any reference and replaces it with the literal value found in the
      * res/values/strings.xml file.
      *

brut.apktool/apktool-lib/src/main/java/brut/androlib/src/SmaliBuilder.java

@@ -25,9 +25,9 @@ import com.android.tools.smali.dexlib2.Opcodes;
 import com.android.tools.smali.dexlib2.writer.builder.DexBuilder;
 import com.android.tools.smali.dexlib2.writer.io.FileDataStore;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.file.Files;
 import java.util.logging.Logger;
 
 public class SmaliBuilder {
@@ -63,7 +63,7 @@ public class SmaliBuilder {
     private void buildFile(String fileName, DexBuilder dexBuilder)
             throws AndrolibException, IOException {
         File inFile = new File(mSmaliDir, fileName);
-        InputStream inStream = new FileInputStream(inFile);
+        InputStream inStream = Files.newInputStream(inFile.toPath());
 
         if (fileName.endsWith(".smali")) {
             try {

brut.apktool/apktool-lib/src/main/java/brut/androlib/src/SmaliDecoder.java

@@ -80,7 +80,7 @@ public class SmaliDecoder {
                 dexEntry = container.getEntry(mDexFile);
             }
 
-            // Double check the passed param exists
+            // Double-check the passed param exists
             if (dexEntry == null) {
                 dexEntry = container.getEntry(container.getDexEntryNames().get(0));
             }

brut.apktool/apktool-lib/src/main/java/org/xmlpull/renamed/MXSerializer.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
+import java.util.Objects;
 
 /**
  * Implementation of XmlSerializer interface from XmlPull V1 API. This
@@ -106,7 +107,7 @@ public class MXSerializer implements XmlSerializer {
 	private final boolean checkNamesInterned = false;
 
 	private void checkInterning(String name) {
-		if (namesInterned && name != name.intern()) {
+		if (namesInterned && !Objects.equals(name, name.intern())) {
 			throw new IllegalArgumentException("all names passed as arguments must be interned"
 					+ "when NAMES INTERNED feature is enabled");
 		}

brut.apktool/apktool-lib/src/test/java/brut/androlib/TestUtils.java

@@ -127,7 +127,7 @@ public abstract class TestUtils {
 
     public static byte[] readHeaderOfFile(File file, int size) throws IOException {
         byte[] buffer = new byte[size];
-        InputStream inputStream = new FileInputStream(file);
+        InputStream inputStream = Files.newInputStream(file.toPath());
         if (inputStream.read(buffer) != buffer.length) {
             throw new IOException("File size too small for buffer length: " + size);
         }

brut.j.dir/src/main/java/brut/directory/DirUtil.java

@@ -90,6 +90,7 @@ public class DirUtil {
             } else {
                 String cleanedFilename = BrutIO.sanitizeUnknownFile(out, fileName);
                 File outFile = new File(out, cleanedFilename);
+                //noinspection ResultOfMethodCallIgnored
                 outFile.getParentFile().mkdirs();
                 BrutIO.copyAndClose(in.getFileInput(fileName), Files.newOutputStream(outFile.toPath()));
             }

brut.j.dir/src/main/java/brut/directory/FileDirectory.java

@@ -59,6 +59,7 @@ public class FileDirectory extends AbstractDirectory {
     @Override
     protected AbstractDirectory createDirLocal(String name) throws DirectoryException {
         File dir = new File(generatePath(name));
+        //noinspection ResultOfMethodCallIgnored
         dir.mkdir();
         return new FileDirectory(dir);
     }
@@ -93,6 +94,7 @@ public class FileDirectory extends AbstractDirectory {
 
     @Override
     protected void removeFileLocal(String name) {
+        //noinspection ResultOfMethodCallIgnored
         new File(generatePath(name)).delete();
     }
 

brut.j.dir/src/main/java/brut/directory/ZipUtils.java

@@ -22,6 +22,7 @@ import org.apache.commons.io.FilenameUtils;
 import org.apache.commons.io.IOUtils;
 
 import java.io.*;
+import java.nio.file.Files;
 import java.util.Collection;
 import java.util.zip.CRC32;
 import java.util.zip.ZipEntry;
@@ -39,7 +40,7 @@ public class ZipUtils {
             throws BrutException, IOException {
 
         mDoNotCompress = doNotCompress;
-        ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(zip));
+        ZipOutputStream zipOutputStream = new ZipOutputStream(Files.newOutputStream(zip.toPath()));
         zipFolders(folder, zipOutputStream);
 
         // We manually set the assets because we need to retain the folder structure
@@ -67,7 +68,7 @@ public class ZipUtils {
                 if (mDoNotCompress != null && (mDoNotCompress.contains(extension) || mDoNotCompress.contains(zipEntry.getName()))) {
                     zipEntry.setMethod(ZipEntry.STORED);
                     zipEntry.setSize(file.length());
-                    BufferedInputStream unknownFile = new BufferedInputStream(new FileInputStream(file));
+                    BufferedInputStream unknownFile = new BufferedInputStream(Files.newInputStream(file.toPath()));
                     CRC32 crc = BrutIO.calculateCrc(unknownFile);
                     zipEntry.setCrc(crc.getValue());
                     unknownFile.close();

brut.j.util/src/main/java/brut/util/AaptManager.java

@@ -67,6 +67,7 @@ public class AaptManager {
         if (! aaptPath.isEmpty()) {
             File aaptFile = new File(aaptPath);
             if (aaptFile.canRead() && aaptFile.exists()) {
+                //noinspection ResultOfMethodCallIgnored
                 aaptFile.setExecutable(true);
                 return aaptFile.getPath();
             } else {
@@ -101,6 +102,7 @@ public class AaptManager {
         if (!aapt.isFile()) {
             throw new BrutException("Could not identify aapt binary as executable.");
         }
+        //noinspection ResultOfMethodCallIgnored
         aapt.setExecutable(true);
 
         List<String> cmd = new ArrayList<>();

brut.j.util/src/main/java/brut/util/Jar.java

@@ -20,6 +20,7 @@ import brut.common.BrutException;
 import org.apache.commons.io.IOUtils;
 
 import java.io.*;
+import java.nio.file.Files;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ThreadLocalRandom;
@@ -51,7 +52,7 @@ public abstract class Jar {
             File fileOut = File.createTempFile(tmpPrefix, suffix + ".tmp");
             fileOut.deleteOnExit();
 
-            OutputStream out = new FileOutputStream(fileOut);
+            OutputStream out = Files.newOutputStream(fileOut.toPath());
             IOUtils.copy(in, out);
             in.close();
             out.close();

brut.j.util/src/main/java/brut/util/OS.java

@@ -20,6 +20,7 @@ import brut.common.BrutException;
 import org.apache.commons.io.IOUtils;
 
 import java.io.*;
+import java.nio.file.Files;
 import java.util.Arrays;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -43,15 +44,18 @@ public class OS {
             if (file.isDirectory()) {
                 rmdir(file);
             } else {
+                //noinspection ResultOfMethodCallIgnored
                 file.delete();
             }
         }
+        //noinspection ResultOfMethodCallIgnored
         dir.delete();
     }
 
     public static void rmfile(String file) {
     	File del = new File(file);
-    	del.delete();
+        //noinspection ResultOfMethodCallIgnored
+        del.delete();
     }
 
     public static void rmdir(String dir) throws BrutException {
@@ -59,6 +63,7 @@ public class OS {
     }
 
     public static void cpdir(File src, File dest) throws BrutException {
+        //noinspection ResultOfMethodCallIgnored
         dest.mkdirs();
         File[] files = src.listFiles();
         if (files == null) {
@@ -72,8 +77,8 @@ public class OS {
                 continue;
             }
             try {
-                try (InputStream in = new FileInputStream(file)) {
+                try (InputStream in = Files.newInputStream(file.toPath())) {
-                    try (OutputStream out = new FileOutputStream(destFile)) {
+                    try (OutputStream out = Files.newOutputStream(destFile.toPath())) {
                         IOUtils.copy(in, out);
                     }
                 }