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. 
public class org.jdbi.v3.core.config.ConfigRegistry
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.jdbi.v3.core.config.ConfigRegistry
  super_class: java.lang.Object
{
  private final java.util.Map<java.lang.Class<? extends org.jdbi.v3.core.config.JdbiConfig<?>>, org.jdbi.v3.core.config.JdbiConfig<?>> cache;
    descriptor: Ljava/util/Map;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Map<Ljava/lang/Class<+Lorg/jdbi/v3/core/config/JdbiConfig<*>;>;Lorg/jdbi/v3/core/config/JdbiConfig<*>;>;

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.jdbi.v3.core.config.ConfigRegistry this
         0: .line 32
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 27
            aload 0 /* this */
            new java.util.WeakHashMap
            dup
            invokespecial java.util.WeakHashMap.<init>:()V
            invokestatic java.util.Collections.synchronizedMap:(Ljava/util/Map;)Ljava/util/Map;
            putfield org.jdbi.v3.core.config.ConfigRegistry.cache:Ljava/util/Map;
         2: .line 32
            return
        end local 0 // org.jdbi.v3.core.config.ConfigRegistry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/jdbi/v3/core/config/ConfigRegistry;

  private void <init>(org.jdbi.v3.core.config.ConfigRegistry);
    descriptor: (Lorg/jdbi/v3/core/config/ConfigRegistry;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.jdbi.v3.core.config.ConfigRegistry this
        start local 1 // org.jdbi.v3.core.config.ConfigRegistry that
         0: .line 34
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 27
            aload 0 /* this */
            new java.util.WeakHashMap
            dup
            invokespecial java.util.WeakHashMap.<init>:()V
            invokestatic java.util.Collections.synchronizedMap:(Ljava/util/Map;)Ljava/util/Map;
            putfield org.jdbi.v3.core.config.ConfigRegistry.cache:Ljava/util/Map;
         2: .line 35
            aload 1 /* that */
            getfield org.jdbi.v3.core.config.ConfigRegistry.cache:Ljava/util/Map;
            aload 0 /* this */
            invokedynamic accept(Lorg/jdbi/v3/core/config/ConfigRegistry;)Ljava/util/function/BiConsumer;
              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;Ljava/lang/Object;)V
                  org/jdbi/v3/core/config/ConfigRegistry.lambda$0(Ljava/lang/Class;Lorg/jdbi/v3/core/config/JdbiConfig;)V (7)
                  (Ljava/lang/Class;Lorg/jdbi/v3/core/config/JdbiConfig;)V
            invokeinterface java.util.Map.forEach:(Ljava/util/function/BiConsumer;)V
         3: .line 40
            return
        end local 1 // org.jdbi.v3.core.config.ConfigRegistry that
        end local 0 // org.jdbi.v3.core.config.ConfigRegistry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/jdbi/v3/core/config/ConfigRegistry;
            0    4     1  that  Lorg/jdbi/v3/core/config/ConfigRegistry;
    MethodParameters:
      Name  Flags
      that  

  public <C extends org.jdbi.v3.core.config.JdbiConfig<C>> C get(java.lang.Class<C>);
    descriptor: (Ljava/lang/Class;)Lorg/jdbi/v3/core/config/JdbiConfig;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // org.jdbi.v3.core.config.ConfigRegistry this
        start local 1 // java.lang.Class configClass
         0: .line 51
            aload 1 /* configClass */
            aload 0 /* this */
            getfield org.jdbi.v3.core.config.ConfigRegistry.cache:Ljava/util/Map;
            aload 1 /* configClass */
            aload 0 /* this */
            aload 1 /* configClass */
            invokedynamic apply(Lorg/jdbi/v3/core/config/ConfigRegistry;Ljava/lang/Class;)Ljava/util/function/Function;
              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;)Ljava/lang/Object;
                  org/jdbi/v3/core/config/ConfigRegistry.lambda$1(Ljava/lang/Class;Ljava/lang/Class;)Lorg/jdbi/v3/core/config/JdbiConfig; (7)
                  (Ljava/lang/Class;)Lorg/jdbi/v3/core/config/JdbiConfig;
            invokeinterface java.util.Map.computeIfAbsent:(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;
            invokevirtual java.lang.Class.cast:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast org.jdbi.v3.core.config.JdbiConfig
            areturn
        end local 1 // java.lang.Class configClass
        end local 0 // org.jdbi.v3.core.config.ConfigRegistry this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lorg/jdbi/v3/core/config/ConfigRegistry;
            0    1     1  configClass  Ljava/lang/Class<TC;>;
    Signature: <C::Lorg/jdbi/v3/core/config/JdbiConfig<TC;>;>(Ljava/lang/Class<TC;>;)TC;
    MethodParameters:
             Name  Flags
      configClass  

  public org.jdbi.v3.core.config.ConfigRegistry createCopy();
    descriptor: ()Lorg/jdbi/v3/core/config/ConfigRegistry;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.jdbi.v3.core.config.ConfigRegistry this
         0: .line 71
            new org.jdbi.v3.core.config.ConfigRegistry
            dup
            aload 0 /* this */
            invokespecial org.jdbi.v3.core.config.ConfigRegistry.<init>:(Lorg/jdbi/v3/core/config/ConfigRegistry;)V
            areturn
        end local 0 // org.jdbi.v3.core.config.ConfigRegistry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/jdbi/v3/core/config/ConfigRegistry;

  private void lambda$0(java.lang.Class, org.jdbi.v3.core.config.JdbiConfig);
    descriptor: (Ljava/lang/Class;Lorg/jdbi/v3/core/config/JdbiConfig;)V
    flags: (0x1002) ACC_PRIVATE, ACC_SYNTHETIC
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // org.jdbi.v3.core.config.ConfigRegistry this
        start local 1 // java.lang.Class type
        start local 2 // org.jdbi.v3.core.config.JdbiConfig config
         0: .line 36
            aload 2 /* config */
            invokeinterface org.jdbi.v3.core.config.JdbiConfig.createCopy:()Lorg/jdbi/v3/core/config/JdbiConfig;
            astore 3 /* copy */
        start local 3 // org.jdbi.v3.core.config.JdbiConfig copy
         1: .line 37
            aload 3 /* copy */
            aload 0 /* this */
            invokeinterface org.jdbi.v3.core.config.JdbiConfig.setRegistry:(Lorg/jdbi/v3/core/config/ConfigRegistry;)V
         2: .line 38
            aload 0 /* this */
            getfield org.jdbi.v3.core.config.ConfigRegistry.cache:Ljava/util/Map;
            aload 1 /* type */
            aload 3 /* copy */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 3 // org.jdbi.v3.core.config.JdbiConfig copy
         3: .line 39
            return
        end local 2 // org.jdbi.v3.core.config.JdbiConfig config
        end local 1 // java.lang.Class type
        end local 0 // org.jdbi.v3.core.config.ConfigRegistry this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/jdbi/v3/core/config/ConfigRegistry;
            0    4     1    type  Ljava/lang/Class<+Lorg/jdbi/v3/core/config/JdbiConfig<*>;>;
            0    4     2  config  Lorg/jdbi/v3/core/config/JdbiConfig<*>;
            1    3     3    copy  Lorg/jdbi/v3/core/config/JdbiConfig<*>;

  private org.jdbi.v3.core.config.JdbiConfig lambda$1(java.lang.Class, java.lang.Class);
    descriptor: (Ljava/lang/Class;Ljava/lang/Class;)Lorg/jdbi/v3/core/config/JdbiConfig;
    flags: (0x1002) ACC_PRIVATE, ACC_SYNTHETIC
    Code:
      stack=5, locals=4, args_size=3
        start local 0 // org.jdbi.v3.core.config.ConfigRegistry this
        start local 2 // java.lang.Class type
         0: .line 53
            aload 1
            iconst_0
            anewarray java.lang.Class
            invokevirtual java.lang.Class.getDeclaredConstructor:([Ljava/lang/Class;)Ljava/lang/reflect/Constructor;
            iconst_0
            anewarray java.lang.Object
            invokevirtual java.lang.reflect.Constructor.newInstance:([Ljava/lang/Object;)Ljava/lang/Object;
            checkcast org.jdbi.v3.core.config.JdbiConfig
            astore 3 /* config */
        start local 3 // org.jdbi.v3.core.config.JdbiConfig config
         1: .line 54
            aload 3 /* config */
            aload 0 /* this */
            invokeinterface org.jdbi.v3.core.config.JdbiConfig.setRegistry:(Lorg/jdbi/v3/core/config/ConfigRegistry;)V
         2: .line 55
            aload 3 /* config */
         3: areturn
        end local 3 // org.jdbi.v3.core.config.JdbiConfig config
         4: .line 56
      StackMap locals:
      StackMap stack: java.lang.ReflectiveOperationException
            astore 3 /* e */
        start local 3 // java.lang.ReflectiveOperationException e
         5: .line 57
            new java.lang.IllegalStateException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unable to instantiate config class "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
         6: .line 58
            ldc ". Is there a public no-arg constructor?"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aload 3 /* e */
         7: .line 57
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 3 // java.lang.ReflectiveOperationException e
        end local 2 // java.lang.Class type
        end local 0 // org.jdbi.v3.core.config.ConfigRegistry this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    8     0    this  Lorg/jdbi/v3/core/config/ConfigRegistry;
            0    8     2    type  Ljava/lang/Class<+Lorg/jdbi/v3/core/config/JdbiConfig<*>;>;
            1    4     3  config  TC;
            5    8     3       e  Ljava/lang/ReflectiveOperationException;
      Exception table:
        from    to  target  type
           0     3       4  Class java.lang.ReflectiveOperationException
}
SourceFile: "ConfigRegistry.java"
InnerClasses:
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles