https://tomcat.apache.org/: Tomcat Servlet Engine Core Classes and Standard implementations 
public class org.apache.naming.HandlerRef extends org.apache.naming.AbstractRef
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.naming.HandlerRef
  super_class: org.apache.naming.AbstractRef
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  public static final java.lang.String DEFAULT_FACTORY;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "org.apache.naming.factory.HandlerFactory"

  public static final java.lang.String HANDLER_NAME;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlername"

  public static final java.lang.String HANDLER_CLASS;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlerclass"

  public static final java.lang.String HANDLER_LOCALPART;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlerlocalpart"

  public static final java.lang.String HANDLER_NAMESPACE;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlernamespace"

  public static final java.lang.String HANDLER_PARAMNAME;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlerparamname"

  public static final java.lang.String HANDLER_PARAMVALUE;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlerparamvalue"

  public static final java.lang.String HANDLER_SOAPROLE;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlersoaprole"

  public static final java.lang.String HANDLER_PORTNAME;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "handlerportname"

  public void <init>(java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // org.apache.naming.HandlerRef this
        start local 1 // java.lang.String refname
        start local 2 // java.lang.String handlerClass
         0: .line 87
            aload 0 /* this */
            aload 1 /* refname */
            aload 2 /* handlerClass */
            aconst_null
            aconst_null
            invokespecial org.apache.naming.HandlerRef.<init>:(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
         1: .line 88
            return
        end local 2 // java.lang.String handlerClass
        end local 1 // java.lang.String refname
        end local 0 // org.apache.naming.HandlerRef this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    2     0          this  Lorg/apache/naming/HandlerRef;
            0    2     1       refname  Ljava/lang/String;
            0    2     2  handlerClass  Ljava/lang/String;
    MethodParameters:
              Name  Flags
      refname       
      handlerClass  

  public void <init>(java.lang.String, java.lang.String, java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=6, args_size=5
        start local 0 // org.apache.naming.HandlerRef this
        start local 1 // java.lang.String refname
        start local 2 // java.lang.String handlerClass
        start local 3 // java.lang.String factory
        start local 4 // java.lang.String factoryLocation
         0: .line 93
            aload 0 /* this */
            aload 1 /* refname */
            aload 3 /* factory */
            aload 4 /* factoryLocation */
            invokespecial org.apache.naming.AbstractRef.<init>:(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
         1: .line 94
            aconst_null
            astore 5 /* refAddr */
        start local 5 // javax.naming.StringRefAddr refAddr
         2: .line 95
            aload 1 /* refname */
            ifnull 5
         3: .line 96
            new javax.naming.StringRefAddr
            dup
            ldc "handlername"
            aload 1 /* refname */
            invokespecial javax.naming.StringRefAddr.<init>:(Ljava/lang/String;Ljava/lang/String;)V
            astore 5 /* refAddr */
         4: .line 97
            aload 0 /* this */
            aload 5 /* refAddr */
            invokevirtual org.apache.naming.HandlerRef.add:(Ljavax/naming/RefAddr;)V
         5: .line 99
      StackMap locals: org.apache.naming.HandlerRef java.lang.String java.lang.String java.lang.String java.lang.String javax.naming.StringRefAddr
      StackMap stack:
            aload 2 /* handlerClass */
            ifnull 8
         6: .line 100
            new javax.naming.StringRefAddr
            dup
            ldc "handlerclass"
            aload 2 /* handlerClass */
            invokespecial javax.naming.StringRefAddr.<init>:(Ljava/lang/String;Ljava/lang/String;)V
            astore 5 /* refAddr */
         7: .line 101
            aload 0 /* this */
            aload 5 /* refAddr */
            invokevirtual org.apache.naming.HandlerRef.add:(Ljavax/naming/RefAddr;)V
         8: .line 103
      StackMap locals:
      StackMap stack:
            return
        end local 5 // javax.naming.StringRefAddr refAddr
        end local 4 // java.lang.String factoryLocation
        end local 3 // java.lang.String factory
        end local 2 // java.lang.String handlerClass
        end local 1 // java.lang.String refname
        end local 0 // org.apache.naming.HandlerRef this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    9     0             this  Lorg/apache/naming/HandlerRef;
            0    9     1          refname  Ljava/lang/String;
            0    9     2     handlerClass  Ljava/lang/String;
            0    9     3          factory  Ljava/lang/String;
            0    9     4  factoryLocation  Ljava/lang/String;
            2    9     5          refAddr  Ljavax/naming/StringRefAddr;
    MethodParameters:
                 Name  Flags
      refname          
      handlerClass     
      factory          
      factoryLocation  

  protected java.lang.String getDefaultFactoryClassName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.naming.HandlerRef this
         0: .line 108
            ldc "org.apache.naming.factory.HandlerFactory"
            areturn
        end local 0 // org.apache.naming.HandlerRef this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/naming/HandlerRef;
}
SourceFile: "HandlerRef.java"