public class org.springframework.util.AlternativeJdkIdGenerator implements org.springframework.util.IdGenerator
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.springframework.util.AlternativeJdkIdGenerator
  super_class: java.lang.Object
{
  private final java.util.Random random;
    descriptor: Ljava/util/Random;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=1
        start local 0 // org.springframework.util.AlternativeJdkIdGenerator this
         0: .line 39
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 40
            new java.security.SecureRandom
            dup
            invokespecial java.security.SecureRandom.<init>:()V
            astore 1 /* secureRandom */
        start local 1 // java.security.SecureRandom secureRandom
         2: .line 41
            bipush 8
            newarray 8
            astore 2 /* seed */
        start local 2 // byte[] seed
         3: .line 42
            aload 1 /* secureRandom */
            aload 2 /* seed */
            invokevirtual java.security.SecureRandom.nextBytes:([B)V
         4: .line 43
            aload 0 /* this */
            new java.util.Random
            dup
            new java.math.BigInteger
            dup
            aload 2 /* seed */
            invokespecial java.math.BigInteger.<init>:([B)V
            invokevirtual java.math.BigInteger.longValue:()J
            invokespecial java.util.Random.<init>:(J)V
            putfield org.springframework.util.AlternativeJdkIdGenerator.random:Ljava/util/Random;
         5: .line 44
            return
        end local 2 // byte[] seed
        end local 1 // java.security.SecureRandom secureRandom
        end local 0 // org.springframework.util.AlternativeJdkIdGenerator this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    6     0          this  Lorg/springframework/util/AlternativeJdkIdGenerator;
            2    6     1  secureRandom  Ljava/security/SecureRandom;
            3    6     2          seed  [B

  public java.util.UUID generateId();
    descriptor: ()Ljava/util/UUID;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=7, args_size=1
        start local 0 // org.springframework.util.AlternativeJdkIdGenerator this
         0: .line 49
            bipush 16
            newarray 8
            astore 1 /* randomBytes */
        start local 1 // byte[] randomBytes
         1: .line 50
            aload 0 /* this */
            getfield org.springframework.util.AlternativeJdkIdGenerator.random:Ljava/util/Random;
            aload 1 /* randomBytes */
            invokevirtual java.util.Random.nextBytes:([B)V
         2: .line 52
            lconst_0
            lstore 2 /* mostSigBits */
        start local 2 // long mostSigBits
         3: .line 53
            iconst_0
            istore 4 /* i */
        start local 4 // int i
         4: goto 7
         5: .line 54
      StackMap locals: byte[] long int
      StackMap stack:
            lload 2 /* mostSigBits */
            bipush 8
            lshl
            aload 1 /* randomBytes */
            iload 4 /* i */
            baload
            sipush 255
            iand
            i2l
            lor
            lstore 2 /* mostSigBits */
         6: .line 53
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
         7: iload 4 /* i */
            bipush 8
            if_icmplt 5
        end local 4 // int i
         8: .line 57
            lconst_0
            lstore 4 /* leastSigBits */
        start local 4 // long leastSigBits
         9: .line 58
            bipush 8
            istore 6 /* i */
        start local 6 // int i
        10: goto 13
        11: .line 59
      StackMap locals: org.springframework.util.AlternativeJdkIdGenerator byte[] long long int
      StackMap stack:
            lload 4 /* leastSigBits */
            bipush 8
            lshl
            aload 1 /* randomBytes */
            iload 6 /* i */
            baload
            sipush 255
            iand
            i2l
            lor
            lstore 4 /* leastSigBits */
        12: .line 58
            iinc 6 /* i */ 1
      StackMap locals:
      StackMap stack:
        13: iload 6 /* i */
            bipush 16
            if_icmplt 11
        end local 6 // int i
        14: .line 62
            new java.util.UUID
            dup
            lload 2 /* mostSigBits */
            lload 4 /* leastSigBits */
            invokespecial java.util.UUID.<init>:(JJ)V
            areturn
        end local 4 // long leastSigBits
        end local 2 // long mostSigBits
        end local 1 // byte[] randomBytes
        end local 0 // org.springframework.util.AlternativeJdkIdGenerator this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0   15     0          this  Lorg/springframework/util/AlternativeJdkIdGenerator;
            1   15     1   randomBytes  [B
            3   15     2   mostSigBits  J
            4    8     4             i  I
            9   15     4  leastSigBits  J
           10   14     6             i  I
}
SourceFile: "AlternativeJdkIdGenerator.java"