https://logging.apache.org/log4j/2.x/log4j-core/: The Apache Log4j Implementation (The Apache Software Foundation)
  • Ralph Goers (Nextiva)
  • Gary Gregory (Rocket Software)
  • Scott Deboy
  • Remko Popma
  • Nick Williams
  • Matt Sicker (CloudBees)
  • Bruce Brouwer
  • Mikael Ståldal (Spotify)
  • Carter Kozak 
public abstract class org.apache.logging.log4j.core.appender.rolling.FileExtension extends java.lang.Enum<org.apache.logging.log4j.core.appender.rolling.FileExtension>
  minor version: 0
  major version: 59
  flags: flags: (0x4421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT, ACC_ANNOTATION
  this_class: org.apache.logging.log4j.core.appender.rolling.FileExtension
  super_class: java.lang.Enum
{
  public static final org.apache.logging.log4j.core.appender.rolling.FileExtension ZIP;
    descriptor: Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.logging.log4j.core.appender.rolling.FileExtension GZ;
    descriptor: Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.logging.log4j.core.appender.rolling.FileExtension BZIP2;
    descriptor: Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.logging.log4j.core.appender.rolling.FileExtension DEFLATE;
    descriptor: Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.logging.log4j.core.appender.rolling.FileExtension PACK200;
    descriptor: Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.logging.log4j.core.appender.rolling.FileExtension XZ;
    descriptor: Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  private final java.lang.String extension;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private static final org.apache.logging.log4j.core.appender.rolling.FileExtension[] ENUM$VALUES;
    descriptor: [Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x101a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=5, locals=0, args_size=0
         0: .line 31
            new org.apache.logging.log4j.core.appender.rolling.FileExtension$1
            dup
            ldc "ZIP"
            iconst_0
            ldc ".zip"
            invokespecial org.apache.logging.log4j.core.appender.rolling.FileExtension$1.<init>:(Ljava/lang/String;ILjava/lang/String;)V
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.ZIP:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
         1: .line 38
            new org.apache.logging.log4j.core.appender.rolling.FileExtension$2
            dup
            ldc "GZ"
            iconst_1
            ldc ".gz"
            invokespecial org.apache.logging.log4j.core.appender.rolling.FileExtension$2.<init>:(Ljava/lang/String;ILjava/lang/String;)V
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.GZ:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
         2: .line 45
            new org.apache.logging.log4j.core.appender.rolling.FileExtension$3
            dup
            ldc "BZIP2"
            iconst_2
            ldc ".bz2"
            invokespecial org.apache.logging.log4j.core.appender.rolling.FileExtension$3.<init>:(Ljava/lang/String;ILjava/lang/String;)V
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.BZIP2:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
         3: .line 53
            new org.apache.logging.log4j.core.appender.rolling.FileExtension$4
            dup
            ldc "DEFLATE"
            iconst_3
            ldc ".deflate"
            invokespecial org.apache.logging.log4j.core.appender.rolling.FileExtension$4.<init>:(Ljava/lang/String;ILjava/lang/String;)V
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.DEFLATE:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
         4: .line 61
            new org.apache.logging.log4j.core.appender.rolling.FileExtension$5
            dup
            ldc "PACK200"
            iconst_4
            ldc ".pack200"
            invokespecial org.apache.logging.log4j.core.appender.rolling.FileExtension$5.<init>:(Ljava/lang/String;ILjava/lang/String;)V
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.PACK200:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
         5: .line 69
            new org.apache.logging.log4j.core.appender.rolling.FileExtension$6
            dup
            ldc "XZ"
            iconst_5
            ldc ".xz"
            invokespecial org.apache.logging.log4j.core.appender.rolling.FileExtension$6.<init>:(Ljava/lang/String;ILjava/lang/String;)V
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.XZ:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
         6: .line 30
            bipush 6
            anewarray org.apache.logging.log4j.core.appender.rolling.FileExtension
            dup
            iconst_0
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.ZIP:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aastore
            dup
            iconst_1
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.GZ:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aastore
            dup
            iconst_2
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.BZIP2:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aastore
            dup
            iconst_3
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.DEFLATE:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aastore
            dup
            iconst_4
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.PACK200:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aastore
            dup
            iconst_5
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.XZ:Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aastore
            putstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.ENUM$VALUES:[Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static org.apache.logging.log4j.core.appender.rolling.FileExtension lookup(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=5, args_size=1
        start local 0 // java.lang.String fileExtension
         0: .line 79
            invokestatic org.apache.logging.log4j.core.appender.rolling.FileExtension.values:()[Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            dup
            astore 4
            arraylength
            istore 3
            iconst_0
            istore 2
            goto 5
      StackMap locals: java.lang.String top int int org.apache.logging.log4j.core.appender.rolling.FileExtension[]
      StackMap stack:
         1: aload 4
            iload 2
            aaload
            astore 1 /* ext */
        start local 1 // org.apache.logging.log4j.core.appender.rolling.FileExtension ext
         2: .line 80
            aload 1 /* ext */
            aload 0 /* fileExtension */
            invokevirtual org.apache.logging.log4j.core.appender.rolling.FileExtension.isExtensionFor:(Ljava/lang/String;)Z
            ifeq 4
         3: .line 81
            aload 1 /* ext */
            areturn
        end local 1 // org.apache.logging.log4j.core.appender.rolling.FileExtension ext
         4: .line 79
      StackMap locals:
      StackMap stack:
            iinc 2 1
      StackMap locals:
      StackMap stack:
         5: iload 2
            iload 3
            if_icmplt 1
         6: .line 84
            aconst_null
            areturn
        end local 0 // java.lang.String fileExtension
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    7     0  fileExtension  Ljava/lang/String;
            2    4     1            ext  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    MethodParameters:
               Name  Flags
      fileExtension  final

  public static org.apache.logging.log4j.core.appender.rolling.FileExtension lookupForFile(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=5, args_size=1
        start local 0 // java.lang.String fileName
         0: .line 88
            invokestatic org.apache.logging.log4j.core.appender.rolling.FileExtension.values:()[Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            dup
            astore 4
            arraylength
            istore 3
            iconst_0
            istore 2
            goto 5
      StackMap locals: java.lang.String top int int org.apache.logging.log4j.core.appender.rolling.FileExtension[]
      StackMap stack:
         1: aload 4
            iload 2
            aaload
            astore 1 /* ext */
        start local 1 // org.apache.logging.log4j.core.appender.rolling.FileExtension ext
         2: .line 89
            aload 0 /* fileName */
            aload 1 /* ext */
            getfield org.apache.logging.log4j.core.appender.rolling.FileExtension.extension:Ljava/lang/String;
            invokevirtual java.lang.String.endsWith:(Ljava/lang/String;)Z
            ifeq 4
         3: .line 90
            aload 1 /* ext */
            areturn
        end local 1 // org.apache.logging.log4j.core.appender.rolling.FileExtension ext
         4: .line 88
      StackMap locals:
      StackMap stack:
            iinc 2 1
      StackMap locals:
      StackMap stack:
         5: iload 2
            iload 3
            if_icmplt 1
         6: .line 93
            aconst_null
            areturn
        end local 0 // java.lang.String fileName
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    7     0  fileName  Ljava/lang/String;
            2    4     1       ext  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    MethodParameters:
          Name  Flags
      fileName  final

  private void <init>(java.lang.String, int, java.lang.String);
    descriptor: (Ljava/lang/String;ILjava/lang/String;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=4, args_size=4
        start local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
        start local 3 // java.lang.String extension
         0: .line 98
            aload 0 /* this */
            aload 1
            iload 2
            invokespecial java.lang.Enum.<init>:(Ljava/lang/String;I)V
         1: .line 99
            aload 3 /* extension */
            ldc "extension"
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         2: .line 100
            aload 0 /* this */
            aload 3 /* extension */
            putfield org.apache.logging.log4j.core.appender.rolling.FileExtension.extension:Ljava/lang/String;
         3: .line 101
            return
        end local 3 // java.lang.String extension
        end local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0       this  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            0    4     3  extension  Ljava/lang/String;
    MethodParameters:
               Name  Flags
      $enum$name     
      $enum$ordinal  
      extension      final

  abstract org.apache.logging.log4j.core.appender.rolling.action.Action createCompressAction(java.lang.String, java.lang.String, boolean, int);
    descriptor: (Ljava/lang/String;Ljava/lang/String;ZI)Lorg/apache/logging/log4j/core/appender/rolling/action/Action;
    flags: (0x0400) ACC_ABSTRACT
    MethodParameters:
                  Name  Flags
      renameTo          
      compressedName    
      deleteSource      
      compressionLevel  

  java.lang.String getExtension();
    descriptor: ()Ljava/lang/String;
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
         0: .line 107
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.rolling.FileExtension.extension:Ljava/lang/String;
            areturn
        end local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;

  boolean isExtensionFor(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
        start local 1 // java.lang.String s
         0: .line 111
            aload 1 /* s */
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.rolling.FileExtension.extension:Ljava/lang/String;
            invokevirtual java.lang.String.endsWith:(Ljava/lang/String;)Z
            ireturn
        end local 1 // java.lang.String s
        end local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            0    1     1     s  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      s     final

  int length();
    descriptor: ()I
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
         0: .line 115
            aload 0 /* this */
            getfield org.apache.logging.log4j.core.appender.rolling.FileExtension.extension:Ljava/lang/String;
            invokevirtual java.lang.String.length:()I
            ireturn
        end local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;

  java.io.File source(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/io/File;
    flags: (0x0000) 
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
        start local 1 // java.lang.String fileName
         0: .line 119
            new java.io.File
            dup
            aload 1 /* fileName */
            invokespecial java.io.File.<init>:(Ljava/lang/String;)V
            areturn
        end local 1 // java.lang.String fileName
        end local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            0    1     1  fileName  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      fileName  final

  java.io.File target(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/io/File;
    flags: (0x0000) 
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
        start local 1 // java.lang.String fileName
         0: .line 123
            new java.io.File
            dup
            aload 1 /* fileName */
            invokespecial java.io.File.<init>:(Ljava/lang/String;)V
            areturn
        end local 1 // java.lang.String fileName
        end local 0 // org.apache.logging.log4j.core.appender.rolling.FileExtension this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            0    1     1  fileName  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      fileName  final

  public static org.apache.logging.log4j.core.appender.rolling.FileExtension[] values();
    descriptor: ()[Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=0
         0: .line 1
            getstatic org.apache.logging.log4j.core.appender.rolling.FileExtension.ENUM$VALUES:[Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            dup
            astore 0
            iconst_0
            aload 0
            arraylength
            dup
            istore 1
            anewarray org.apache.logging.log4j.core.appender.rolling.FileExtension
            dup
            astore 2
            iconst_0
            iload 1
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
            aload 2
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static org.apache.logging.log4j.core.appender.rolling.FileExtension valueOf(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
         0: .line 1
            ldc Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;
            aload 0
            invokestatic java.lang.Enum.valueOf:(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;
            checkcast org.apache.logging.log4j.core.appender.rolling.FileExtension
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
      Name  Flags
      name  
}
Signature: Ljava/lang/Enum<Lorg/apache/logging/log4j/core/appender/rolling/FileExtension;>;
SourceFile: "FileExtension.java"
NestMembers:
  org.apache.logging.log4j.core.appender.rolling.FileExtension$1  org.apache.logging.log4j.core.appender.rolling.FileExtension$2  org.apache.logging.log4j.core.appender.rolling.FileExtension$3  org.apache.logging.log4j.core.appender.rolling.FileExtension$4  org.apache.logging.log4j.core.appender.rolling.FileExtension$5  org.apache.logging.log4j.core.appender.rolling.FileExtension$6
InnerClasses:
  org.apache.logging.log4j.core.appender.rolling.FileExtension$1
  org.apache.logging.log4j.core.appender.rolling.FileExtension$2
  org.apache.logging.log4j.core.appender.rolling.FileExtension$3
  org.apache.logging.log4j.core.appender.rolling.FileExtension$4
  org.apache.logging.log4j.core.appender.rolling.FileExtension$5
  org.apache.logging.log4j.core.appender.rolling.FileExtension$6