http://www.jboss.org/shrinkwrap-resolver-parent/shrinkwrap-resolver-impl-maven: Implementation for Resolving Dependencies from a Maven Backend (JBoss by Red Hat) 
class org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper this
         0: .line 175
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 176
            new java.lang.UnsupportedOperationException
            dup
            ldc "No instances should be created; stateless class"
            invokespecial java.lang.UnsupportedOperationException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/jboss/shrinkwrap/resolver/impl/maven/MavenResolvedArtifactImpl$PackageDirHelper;

  private static void safelyClose(java.io.Closeable);
    descriptor: (Ljava/io/Closeable;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // java.io.Closeable closeable
         0: .line 180
            aload 0 /* closeable */
            ifnull 6
         1: .line 182
            aload 0 /* closeable */
            invokeinterface java.io.Closeable.close:()V
         2: .line 183
            goto 6
      StackMap locals:
      StackMap stack: java.io.IOException
         3: astore 1 /* ignore */
        start local 1 // java.io.IOException ignore
         4: .line 184
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl.log:Ljava/util/logging/Logger;
            getstatic java.util.logging.Level.FINER:Ljava/util/logging/Level;
            invokevirtual java.util.logging.Logger.isLoggable:(Ljava/util/logging/Level;)Z
            ifeq 6
         5: .line 185
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl.log:Ljava/util/logging/Logger;
            new java.lang.StringBuilder
            dup
            ldc "Could not close stream due to: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1 /* ignore */
            invokevirtual java.io.IOException.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "; ignoring"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.util.logging.Logger.finer:(Ljava/lang/String;)V
        end local 1 // java.io.IOException ignore
         6: .line 189
      StackMap locals:
      StackMap stack:
            return
        end local 0 // java.io.Closeable closeable
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    7     0  closeable  Ljava/io/Closeable;
            4    6     1     ignore  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           1     2       3  Class java.io.IOException
    MethodParameters:
           Name  Flags
      closeable  final

  static void packageDirectories(java.io.File, java.io.File[]);
    descriptor: (Ljava/io/File;[Ljava/io/File;)V
    flags: (0x0088) ACC_STATIC, ACC_VARARGS
    Code:
      stack=5, locals=12, args_size=2
        start local 0 // java.io.File outputFile
        start local 1 // java.io.File[] directories
         0: .line 193
            aload 1 /* directories */
            ldc "Directories to be packaged must be specified"
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.util.Validate.notNullAndNoNullValues:([Ljava/lang/Object;Ljava/lang/String;)V
         1: .line 195
            new java.util.zip.ZipOutputStream
            dup
            new java.io.FileOutputStream
            dup
            aload 0 /* outputFile */
            invokespecial java.io.FileOutputStream.<init>:(Ljava/io/File;)V
            invokespecial java.util.zip.ZipOutputStream.<init>:(Ljava/io/OutputStream;)V
            astore 2 /* zipFile */
        start local 2 // java.util.zip.ZipOutputStream zipFile
         2: .line 197
            aload 1 /* directories */
            dup
            astore 6
            arraylength
            istore 5
            iconst_0
            istore 4
            goto 19
      StackMap locals: java.io.File java.io.File[] java.util.zip.ZipOutputStream top int int java.io.File[]
      StackMap stack:
         3: aload 6
            iload 4
            aaload
            astore 3 /* directory */
        start local 3 // java.io.File directory
         4: .line 198
            aload 3 /* directory */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.fileListing:(Ljava/io/File;)Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 8
            goto 17
      StackMap locals: java.io.File java.io.File[] java.util.zip.ZipOutputStream java.io.File int int java.io.File[] top java.util.Iterator
      StackMap stack:
         5: aload 8
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.lang.String
            astore 7 /* entry */
        start local 7 // java.lang.String entry
         6: .line 200
            aconst_null
            astore 9 /* fis */
        start local 9 // java.io.FileInputStream fis
         7: .line 202
            new java.io.File
            dup
            aload 3 /* directory */
            aload 7 /* entry */
            invokespecial java.io.File.<init>:(Ljava/io/File;Ljava/lang/String;)V
            astore 10 /* fileEntry */
        start local 10 // java.io.File fileEntry
         8: .line 204
            aload 10 /* fileEntry */
            invokevirtual java.io.File.isFile:()Z
            ifeq 16
         9: .line 205
            new java.io.FileInputStream
            dup
            aload 10 /* fileEntry */
            invokespecial java.io.FileInputStream.<init>:(Ljava/io/File;)V
            astore 9 /* fis */
        10: .line 206
            aload 2 /* zipFile */
            new java.util.zip.ZipEntry
            dup
            aload 7 /* entry */
            invokespecial java.util.zip.ZipEntry.<init>:(Ljava/lang/String;)V
            invokevirtual java.util.zip.ZipOutputStream.putNextEntry:(Ljava/util/zip/ZipEntry;)V
        11: .line 207
            aload 9 /* fis */
            aload 2 /* zipFile */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.util.IOUtil.copy:(Ljava/io/InputStream;Ljava/io/OutputStream;)V
        end local 10 // java.io.File fileEntry
        12: .line 210
            goto 16
      StackMap locals: java.io.File java.io.File[] java.util.zip.ZipOutputStream java.io.File int int java.io.File[] java.lang.String java.util.Iterator java.io.FileInputStream
      StackMap stack: java.lang.Throwable
        13: astore 11
        14: .line 211
            aload 9 /* fis */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.safelyClose:(Ljava/io/Closeable;)V
        15: .line 212
            aload 11
            athrow
        16: .line 211
      StackMap locals:
      StackMap stack:
            aload 9 /* fis */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.safelyClose:(Ljava/io/Closeable;)V
        end local 9 // java.io.FileInputStream fis
        end local 7 // java.lang.String entry
        17: .line 198
      StackMap locals: java.io.File java.io.File[] java.util.zip.ZipOutputStream java.io.File int int java.io.File[] top java.util.Iterator
      StackMap stack:
            aload 8
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 5
        end local 3 // java.io.File directory
        18: .line 197
            iinc 4 1
      StackMap locals: java.io.File java.io.File[] java.util.zip.ZipOutputStream top int int java.io.File[]
      StackMap stack:
        19: iload 4
            iload 5
            if_icmplt 3
        20: .line 215
            aload 2 /* zipFile */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.safelyClose:(Ljava/io/Closeable;)V
        21: .line 216
            return
        end local 2 // java.util.zip.ZipOutputStream zipFile
        end local 1 // java.io.File[] directories
        end local 0 // java.io.File outputFile
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   22     0   outputFile  Ljava/io/File;
            0   22     1  directories  [Ljava/io/File;
            2   22     2      zipFile  Ljava/util/zip/ZipOutputStream;
            4   18     3    directory  Ljava/io/File;
            6   17     7        entry  Ljava/lang/String;
            7   17     9          fis  Ljava/io/FileInputStream;
            8   12    10    fileEntry  Ljava/io/File;
      Exception table:
        from    to  target  type
           7    13      13  any
    Exceptions:
      throws java.io.IOException
    MethodParameters:
             Name  Flags
      outputFile   final
      directories  final

  private static java.util.List<java.lang.String> fileListing(java.io.File);
    descriptor: (Ljava/io/File;)Ljava/util/List;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // java.io.File directory
         0: .line 219
            new java.util.ArrayList
            dup
            invokespecial java.util.ArrayList.<init>:()V
            astore 1 /* list */
        start local 1 // java.util.List list
         1: .line 220
            aload 1 /* list */
            aload 0 /* directory */
            aload 0 /* directory */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.generateFileList:(Ljava/util/List;Ljava/io/File;Ljava/io/File;)V
         2: .line 221
            aload 1 /* list */
            areturn
        end local 1 // java.util.List list
        end local 0 // java.io.File directory
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0  directory  Ljava/io/File;
            1    3     1       list  Ljava/util/List<Ljava/lang/String;>;
    Signature: (Ljava/io/File;)Ljava/util/List<Ljava/lang/String;>;
    MethodParameters:
           Name  Flags
      directory  final

  private static void generateFileList(java.util.List<java.lang.String>, java.io.File, java.io.File);
    descriptor: (Ljava/util/List;Ljava/io/File;Ljava/io/File;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=7, args_size=3
        start local 0 // java.util.List list
        start local 1 // java.io.File root
        start local 2 // java.io.File file
         0: .line 225
            aload 2 /* file */
            invokevirtual java.io.File.isFile:()Z
            ifeq 3
         1: .line 227
            aload 0 /* list */
            aload 1 /* root */
            aload 2 /* file */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.getEntryPath:(Ljava/io/File;Ljava/io/File;)Ljava/lang/String;
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
         2: .line 228
            goto 11
      StackMap locals:
      StackMap stack:
         3: aload 2 /* file */
            invokevirtual java.io.File.isDirectory:()Z
            ifeq 11
         4: .line 229
            aload 2 /* file */
            aload 1 /* root */
            invokevirtual java.io.File.equals:(Ljava/lang/Object;)Z
            ifne 6
         5: .line 230
            aload 0 /* list */
            new java.lang.StringBuilder
            dup
            aload 1 /* root */
            aload 2 /* file */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.getEntryPath:(Ljava/io/File;Ljava/io/File;)Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            getstatic java.io.File.separatorChar:C
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface java.util.List.add:(Ljava/lang/Object;)Z
            pop
         6: .line 232
      StackMap locals:
      StackMap stack:
            aload 2 /* file */
            invokevirtual java.io.File.listFiles:()[Ljava/io/File;
            dup
            astore 6
            arraylength
            istore 5
            iconst_0
            istore 4
            goto 10
      StackMap locals: java.util.List java.io.File java.io.File top int int java.io.File[]
      StackMap stack:
         7: aload 6
            iload 4
            aaload
            astore 3 /* next */
        start local 3 // java.io.File next
         8: .line 233
            aload 0 /* list */
            aload 1 /* root */
            aload 3 /* next */
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper.generateFileList:(Ljava/util/List;Ljava/io/File;Ljava/io/File;)V
        end local 3 // java.io.File next
         9: .line 232
            iinc 4 1
      StackMap locals:
      StackMap stack:
        10: iload 4
            iload 5
            if_icmplt 7
        11: .line 236
      StackMap locals: java.util.List java.io.File java.io.File
      StackMap stack:
            return
        end local 2 // java.io.File file
        end local 1 // java.io.File root
        end local 0 // java.util.List list
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   12     0  list  Ljava/util/List<Ljava/lang/String;>;
            0   12     1  root  Ljava/io/File;
            0   12     2  file  Ljava/io/File;
            8    9     3  next  Ljava/io/File;
    Signature: (Ljava/util/List<Ljava/lang/String;>;Ljava/io/File;Ljava/io/File;)V
    MethodParameters:
      Name  Flags
      list  final
      root  final
      file  final

  private static java.lang.String getEntryPath(java.io.File, java.io.File);
    descriptor: (Ljava/io/File;Ljava/io/File;)Ljava/lang/String;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // java.io.File root
        start local 1 // java.io.File file
         0: .line 239
            aload 1 /* file */
            invokevirtual java.io.File.getAbsolutePath:()Ljava/lang/String;
            aload 0 /* root */
            invokevirtual java.io.File.getAbsolutePath:()Ljava/lang/String;
            invokevirtual java.lang.String.length:()I
            iconst_1
            iadd
            invokevirtual java.lang.String.substring:(I)Ljava/lang/String;
         1: .line 240
            getstatic java.io.File.separatorChar:C
            bipush 47
            invokevirtual java.lang.String.replace:(CC)Ljava/lang/String;
         2: .line 239
            areturn
        end local 1 // java.io.File file
        end local 0 // java.io.File root
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  root  Ljava/io/File;
            0    3     1  file  Ljava/io/File;
    MethodParameters:
      Name  Flags
      root  final
      file  final
}
SourceFile: "MavenResolvedArtifactImpl.java"
NestHost: org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl
InnerClasses:
  PackageDirHelper = org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl$PackageDirHelper of org.jboss.shrinkwrap.resolver.impl.maven.MavenResolvedArtifactImpl