http://jdbi.org/: jdbi is designed to provide convenient tabular data access in Java(tm). It uses the Java collections framework for query results, provides a convenient means of externalizing sql statements, and provides named parameter support for any database being used. 
class org.jdbi.v3.core.LazyHandleSupplier implements org.jdbi.v3.core.extension.HandleSupplier, java.lang.AutoCloseable
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.jdbi.v3.core.LazyHandleSupplier
  super_class: java.lang.Object
{
  private final java.lang.Object[] lock;
    descriptor: [Ljava/lang/Object;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final org.jdbi.v3.core.Jdbi db;
    descriptor: Lorg/jdbi/v3/core/Jdbi;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.lang.ThreadLocal<org.jdbi.v3.core.config.ConfigRegistry> config;
    descriptor: Ljava/lang/ThreadLocal;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/lang/ThreadLocal<Lorg/jdbi/v3/core/config/ConfigRegistry;>;

  private final java.lang.ThreadLocal<org.jdbi.v3.core.extension.ExtensionMethod> extensionMethod;
    descriptor: Ljava/lang/ThreadLocal;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/lang/ThreadLocal<Lorg/jdbi/v3/core/extension/ExtensionMethod;>;

  private volatile org.jdbi.v3.core.Handle handle;
    descriptor: Lorg/jdbi/v3/core/Handle;
    flags: (0x0042) ACC_PRIVATE, ACC_VOLATILE

  private volatile boolean closed;
    descriptor: Z
    flags: (0x0042) ACC_PRIVATE, ACC_VOLATILE

  void <init>(org.jdbi.v3.core.Jdbi, org.jdbi.v3.core.config.ConfigRegistry);
    descriptor: (Lorg/jdbi/v3/core/Jdbi;Lorg/jdbi/v3/core/config/ConfigRegistry;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
        start local 1 // org.jdbi.v3.core.Jdbi db
        start local 2 // org.jdbi.v3.core.config.ConfigRegistry config
         0: .line 33
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 24
            aload 0 /* this */
            iconst_0
            anewarray java.lang.Object
            putfield org.jdbi.v3.core.LazyHandleSupplier.lock:[Ljava/lang/Object;
         2: .line 28
            aload 0 /* this */
            new java.lang.ThreadLocal
            dup
            invokespecial java.lang.ThreadLocal.<init>:()V
            putfield org.jdbi.v3.core.LazyHandleSupplier.extensionMethod:Ljava/lang/ThreadLocal;
         3: .line 31
            aload 0 /* this */
            iconst_0
            putfield org.jdbi.v3.core.LazyHandleSupplier.closed:Z
         4: .line 34
            aload 0 /* this */
            aload 1 /* db */
            putfield org.jdbi.v3.core.LazyHandleSupplier.db:Lorg/jdbi/v3/core/Jdbi;
         5: .line 35
            aload 0 /* this */
            aload 2 /* config */
            invokedynamic get(Lorg/jdbi/v3/core/config/ConfigRegistry;)Ljava/util/function/Supplier;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  ()Ljava/lang/Object;
                  org/jdbi/v3/core/LazyHandleSupplier.lambda$0(Lorg/jdbi/v3/core/config/ConfigRegistry;)Lorg/jdbi/v3/core/config/ConfigRegistry; (6)
                  ()Lorg/jdbi/v3/core/config/ConfigRegistry;
            invokestatic java.lang.ThreadLocal.withInitial:(Ljava/util/function/Supplier;)Ljava/lang/ThreadLocal;
            putfield org.jdbi.v3.core.LazyHandleSupplier.config:Ljava/lang/ThreadLocal;
         6: .line 36
            return
        end local 2 // org.jdbi.v3.core.config.ConfigRegistry config
        end local 1 // org.jdbi.v3.core.Jdbi db
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    7     0    this  Lorg/jdbi/v3/core/LazyHandleSupplier;
            0    7     1      db  Lorg/jdbi/v3/core/Jdbi;
            0    7     2  config  Lorg/jdbi/v3/core/config/ConfigRegistry;
    MethodParameters:
        Name  Flags
      db      
      config  

  public org.jdbi.v3.core.config.ConfigRegistry getConfig();
    descriptor: ()Lorg/jdbi/v3/core/config/ConfigRegistry;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
         0: .line 40
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.config:Ljava/lang/ThreadLocal;
            invokevirtual java.lang.ThreadLocal.get:()Ljava/lang/Object;
            checkcast org.jdbi.v3.core.config.ConfigRegistry
            areturn
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/jdbi/v3/core/LazyHandleSupplier;

  public org.jdbi.v3.core.Handle getHandle();
    descriptor: ()Lorg/jdbi/v3/core/Handle;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
         0: .line 45
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.handle:Lorg/jdbi/v3/core/Handle;
            ifnonnull 2
         1: .line 46
            aload 0 /* this */
            invokevirtual org.jdbi.v3.core.LazyHandleSupplier.initHandle:()V
         2: .line 48
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.handle:Lorg/jdbi/v3/core/Handle;
            areturn
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/jdbi/v3/core/LazyHandleSupplier;

  private void initHandle();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
         0: .line 52
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.lock:[Ljava/lang/Object;
            dup
            astore 1
            monitorenter
         1: .line 53
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.handle:Lorg/jdbi/v3/core/Handle;
            ifnonnull 8
         2: .line 54
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.closed:Z
            ifeq 4
         3: .line 55
            new java.lang.IllegalStateException
            dup
            ldc "Handle is closed"
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 58
      StackMap locals: java.lang.Object[]
      StackMap stack:
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.db:Lorg/jdbi/v3/core/Jdbi;
            invokevirtual org.jdbi.v3.core.Jdbi.open:()Lorg/jdbi/v3/core/Handle;
            astore 2 /* handle */
        start local 2 // org.jdbi.v3.core.Handle handle
         5: .line 61
            aload 2 /* handle */
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.extensionMethod:Ljava/lang/ThreadLocal;
            invokevirtual org.jdbi.v3.core.Handle.setExtensionMethodThreadLocal:(Ljava/lang/ThreadLocal;)V
         6: .line 62
            aload 2 /* handle */
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.config:Ljava/lang/ThreadLocal;
            invokevirtual org.jdbi.v3.core.Handle.setConfigThreadLocal:(Ljava/lang/ThreadLocal;)V
         7: .line 64
            aload 0 /* this */
            aload 2 /* handle */
            putfield org.jdbi.v3.core.LazyHandleSupplier.handle:Lorg/jdbi/v3/core/Handle;
        end local 2 // org.jdbi.v3.core.Handle handle
         8: .line 52
      StackMap locals:
      StackMap stack:
            aload 1
            monitorexit
         9: goto 12
      StackMap locals:
      StackMap stack: java.lang.Throwable
        10: aload 1
            monitorexit
        11: athrow
        12: .line 67
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   13     0    this  Lorg/jdbi/v3/core/LazyHandleSupplier;
            5    8     2  handle  Lorg/jdbi/v3/core/Handle;
      Exception table:
        from    to  target  type
           1     9      10  any
          10    11      10  any

  public <V> V invokeInContext(org.jdbi.v3.core.extension.ExtensionMethod, org.jdbi.v3.core.config.ConfigRegistry, java.util.concurrent.Callable<V>);
    descriptor: (Lorg/jdbi/v3/core/extension/ExtensionMethod;Lorg/jdbi/v3/core/config/ConfigRegistry;Ljava/util/concurrent/Callable;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=4
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
        start local 1 // org.jdbi.v3.core.extension.ExtensionMethod extensionMethod
        start local 2 // org.jdbi.v3.core.config.ConfigRegistry config
        start local 3 // java.util.concurrent.Callable task
         0: .line 71
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.extensionMethod:Ljava/lang/ThreadLocal;
            aload 1 /* extensionMethod */
         1: .line 72
            aload 0 /* this */
            aload 2 /* config */
            aload 3 /* task */
            invokedynamic call(Lorg/jdbi/v3/core/LazyHandleSupplier;Lorg/jdbi/v3/core/config/ConfigRegistry;Ljava/util/concurrent/Callable;)Ljava/util/concurrent/Callable;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  ()Ljava/lang/Object;
                  org/jdbi/v3/core/LazyHandleSupplier.lambda$1(Lorg/jdbi/v3/core/config/ConfigRegistry;Ljava/util/concurrent/Callable;)Ljava/lang/Object; (7)
                  ()Ljava/lang/Object;
         2: .line 71
            invokestatic org.jdbi.v3.core.internal.JdbiThreadLocals.invokeInContext:(Ljava/lang/ThreadLocal;Ljava/lang/Object;Ljava/util/concurrent/Callable;)Ljava/lang/Object;
            areturn
        end local 3 // java.util.concurrent.Callable task
        end local 2 // org.jdbi.v3.core.config.ConfigRegistry config
        end local 1 // org.jdbi.v3.core.extension.ExtensionMethod extensionMethod
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    3     0             this  Lorg/jdbi/v3/core/LazyHandleSupplier;
            0    3     1  extensionMethod  Lorg/jdbi/v3/core/extension/ExtensionMethod;
            0    3     2           config  Lorg/jdbi/v3/core/config/ConfigRegistry;
            0    3     3             task  Ljava/util/concurrent/Callable<TV;>;
    Exceptions:
      throws java.lang.Exception
    Signature: <V:Ljava/lang/Object;>(Lorg/jdbi/v3/core/extension/ExtensionMethod;Lorg/jdbi/v3/core/config/ConfigRegistry;Ljava/util/concurrent/Callable<TV;>;)TV;
    MethodParameters:
                 Name  Flags
      extensionMethod  
      config           
      task             

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
         0: .line 77
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.lock:[Ljava/lang/Object;
            dup
            astore 1
            monitorenter
         1: .line 78
            aload 0 /* this */
            iconst_1
            putfield org.jdbi.v3.core.LazyHandleSupplier.closed:Z
         2: .line 80
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.handle:Lorg/jdbi/v3/core/Handle;
            ifnonnull 6
         3: .line 81
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.config:Ljava/lang/ThreadLocal;
            invokevirtual java.lang.ThreadLocal.remove:()V
         4: .line 82
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.extensionMethod:Ljava/lang/ThreadLocal;
            invokevirtual java.lang.ThreadLocal.remove:()V
         5: .line 83
            goto 7
         6: .line 84
      StackMap locals: java.lang.Object[]
      StackMap stack:
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.handle:Lorg/jdbi/v3/core/Handle;
            invokevirtual org.jdbi.v3.core.Handle.close:()V
         7: .line 77
      StackMap locals:
      StackMap stack:
            aload 1
            monitorexit
         8: goto 11
      StackMap locals:
      StackMap stack: java.lang.Throwable
         9: aload 1
            monitorexit
        10: athrow
        11: .line 87
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   12     0  this  Lorg/jdbi/v3/core/LazyHandleSupplier;
      Exception table:
        from    to  target  type
           1     8       9  any
           9    10       9  any

  private static org.jdbi.v3.core.config.ConfigRegistry lambda$0(org.jdbi.v3.core.config.ConfigRegistry);
    descriptor: (Lorg/jdbi/v3/core/config/ConfigRegistry;)Lorg/jdbi/v3/core/config/ConfigRegistry;
    flags: (0x100a) ACC_PRIVATE, ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 35
            aload 0
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private java.lang.Object lambda$1(org.jdbi.v3.core.config.ConfigRegistry, java.util.concurrent.Callable);
    descriptor: (Lorg/jdbi/v3/core/config/ConfigRegistry;Ljava/util/concurrent/Callable;)Ljava/lang/Object;
    flags: (0x1002) ACC_PRIVATE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.jdbi.v3.core.LazyHandleSupplier this
         0: .line 72
            aload 0 /* this */
            getfield org.jdbi.v3.core.LazyHandleSupplier.config:Ljava/lang/ThreadLocal;
            aload 1
            aload 2
            invokestatic org.jdbi.v3.core.internal.JdbiThreadLocals.invokeInContext:(Ljava/lang/ThreadLocal;Ljava/lang/Object;Ljava/util/concurrent/Callable;)Ljava/lang/Object;
            areturn
        end local 0 // org.jdbi.v3.core.LazyHandleSupplier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/jdbi/v3/core/LazyHandleSupplier;
    Exceptions:
      throws java.lang.Exception
}
SourceFile: "LazyHandleSupplier.java"
InnerClasses:
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles