http://xml.apache.org/commons/components/external/: xml-commons provides an Apache-hosted set of DOM, SAX, and JAXP interfaces for use in other xml-based projects. Our hope is that we can standardize on both a common version and packaging scheme for these critical XML standards interfaces to make the lives of both our developers and users easier. The External Components portion of xml-commons contains interfaces that are defined by external standards organizations. For DOM, that's the W3C; for SAX it's David Megginson and sax.sourceforge.net; for JAXP it's Sun. 
public abstract class javax.xml.transform.TransformerFactory
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: javax.xml.transform.TransformerFactory
  super_class: java.lang.Object
{
  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // javax.xml.transform.TransformerFactory this
         0: .line 40
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // javax.xml.transform.TransformerFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljavax/xml/transform/TransformerFactory;

  public static javax.xml.transform.TransformerFactory newInstance();
    descriptor: ()Ljavax/xml/transform/TransformerFactory;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=1, args_size=0
         0: .line 116
            ldc "javax.xml.transform.TransformerFactory"
         1: .line 118
            ldc "org.apache.xalan.processor.TransformerFactoryImpl"
         2: .line 114
            invokestatic javax.xml.transform.FactoryFinder.find:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;
            checkcast javax.xml.transform.TransformerFactory
         3: areturn
         4: .line 120
      StackMap locals:
      StackMap stack: javax.xml.transform.FactoryFinder$ConfigurationError
            astore 0 /* e */
        start local 0 // javax.xml.transform.FactoryFinder$ConfigurationError e
         5: .line 121
            new javax.xml.transform.TransformerFactoryConfigurationError
            dup
            aload 0 /* e */
            invokevirtual javax.xml.transform.FactoryFinder$ConfigurationError.getException:()Ljava/lang/Exception;
            aload 0 /* e */
            invokevirtual javax.xml.transform.FactoryFinder$ConfigurationError.getMessage:()Ljava/lang/String;
            invokespecial javax.xml.transform.TransformerFactoryConfigurationError.<init>:(Ljava/lang/Exception;Ljava/lang/String;)V
            athrow
        end local 0 // javax.xml.transform.FactoryFinder$ConfigurationError e
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            5    6     0     e  Ljavax/xml/transform/FactoryFinder$ConfigurationError;
      Exception table:
        from    to  target  type
           0     3       4  Class javax.xml.transform.FactoryFinder$ConfigurationError
    Exceptions:
      throws javax.xml.transform.TransformerFactoryConfigurationError

  public static javax.xml.transform.TransformerFactory newInstance(java.lang.String, java.lang.ClassLoader);
    descriptor: (Ljava/lang/String;Ljava/lang/ClassLoader;)Ljavax/xml/transform/TransformerFactory;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // java.lang.String factoryClassName
        start local 1 // java.lang.ClassLoader classLoader
         0: .line 133
            aload 0 /* factoryClassName */
            ifnonnull 2
         1: .line 134
            new javax.xml.transform.TransformerFactoryConfigurationError
            dup
            ldc "factoryClassName cannot be null."
            invokespecial javax.xml.transform.TransformerFactoryConfigurationError.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 136
      StackMap locals:
      StackMap stack:
            aload 1 /* classLoader */
            ifnonnull 4
         3: .line 137
            invokestatic javax.xml.transform.SecuritySupport.getContextClassLoader:()Ljava/lang/ClassLoader;
            astore 1 /* classLoader */
         4: .line 140
      StackMap locals:
      StackMap stack:
            aload 0 /* factoryClassName */
            aload 1 /* classLoader */
            iconst_0
            invokestatic javax.xml.transform.FactoryFinder.newInstance:(Ljava/lang/String;Ljava/lang/ClassLoader;Z)Ljava/lang/Object;
            checkcast javax.xml.transform.TransformerFactory
         5: areturn
         6: .line 142
      StackMap locals:
      StackMap stack: javax.xml.transform.FactoryFinder$ConfigurationError
            astore 2 /* e */
        start local 2 // javax.xml.transform.FactoryFinder$ConfigurationError e
         7: .line 143
            new javax.xml.transform.TransformerFactoryConfigurationError
            dup
            aload 2 /* e */
            invokevirtual javax.xml.transform.FactoryFinder$ConfigurationError.getException:()Ljava/lang/Exception;
            aload 2 /* e */
            invokevirtual javax.xml.transform.FactoryFinder$ConfigurationError.getMessage:()Ljava/lang/String;
            invokespecial javax.xml.transform.TransformerFactoryConfigurationError.<init>:(Ljava/lang/Exception;Ljava/lang/String;)V
            athrow
        end local 2 // javax.xml.transform.FactoryFinder$ConfigurationError e
        end local 1 // java.lang.ClassLoader classLoader
        end local 0 // java.lang.String factoryClassName
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    8     0  factoryClassName  Ljava/lang/String;
            0    8     1       classLoader  Ljava/lang/ClassLoader;
            7    8     2                 e  Ljavax/xml/transform/FactoryFinder$ConfigurationError;
      Exception table:
        from    to  target  type
           4     5       6  Class javax.xml.transform.FactoryFinder$ConfigurationError
    Exceptions:
      throws javax.xml.transform.TransformerFactoryConfigurationError
    MethodParameters:
                  Name  Flags
      factoryClassName  
      classLoader       

  public abstract javax.xml.transform.Transformer newTransformer(javax.xml.transform.Source);
    descriptor: (Ljavax/xml/transform/Source;)Ljavax/xml/transform/Transformer;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws javax.xml.transform.TransformerConfigurationException
    MethodParameters:
        Name  Flags
      source  

  public abstract javax.xml.transform.Transformer newTransformer();
    descriptor: ()Ljavax/xml/transform/Transformer;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws javax.xml.transform.TransformerConfigurationException

  public abstract javax.xml.transform.Templates newTemplates(javax.xml.transform.Source);
    descriptor: (Ljavax/xml/transform/Source;)Ljavax/xml/transform/Templates;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws javax.xml.transform.TransformerConfigurationException
    MethodParameters:
        Name  Flags
      source  

  public abstract javax.xml.transform.Source getAssociatedStylesheet(javax.xml.transform.Source, java.lang.String, java.lang.String, java.lang.String);
    descriptor: (Ljavax/xml/transform/Source;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Ljavax/xml/transform/Source;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws javax.xml.transform.TransformerConfigurationException
    MethodParameters:
         Name  Flags
      source   
      media    
      title    
      charset  

  public abstract void setURIResolver(javax.xml.transform.URIResolver);
    descriptor: (Ljavax/xml/transform/URIResolver;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      resolver  

  public abstract javax.xml.transform.URIResolver getURIResolver();
    descriptor: ()Ljavax/xml/transform/URIResolver;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void setFeature(java.lang.String, boolean);
    descriptor: (Ljava/lang/String;Z)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws javax.xml.transform.TransformerConfigurationException
    MethodParameters:
       Name  Flags
      name   
      value  

  public abstract boolean getFeature(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      name  

  public abstract void setAttribute(java.lang.String, java.lang.Object);
    descriptor: (Ljava/lang/String;Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      name   
      value  

  public abstract java.lang.Object getAttribute(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      name  

  public abstract void setErrorListener(javax.xml.transform.ErrorListener);
    descriptor: (Ljavax/xml/transform/ErrorListener;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      listener  

  public abstract javax.xml.transform.ErrorListener getErrorListener();
    descriptor: ()Ljavax/xml/transform/ErrorListener;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "TransformerFactory.java"
InnerClasses:
  ConfigurationError = javax.xml.transform.FactoryFinder$ConfigurationError of javax.xml.transform.FactoryFinder