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 class javax.xml.stream.FactoryConfigurationError extends java.lang.Error
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: javax.xml.stream.FactoryConfigurationError
  super_class: java.lang.Error
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: -2994412584589975744

  private java.lang.Exception nested;
    descriptor: Ljava/lang/Exception;
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // javax.xml.stream.FactoryConfigurationError this
         0: .line 29
            aload 0 /* this */
            invokespecial java.lang.Error.<init>:()V
         1: .line 30
            return
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Ljavax/xml/stream/FactoryConfigurationError;

  public void <init>(java.lang.Exception);
    descriptor: (Ljava/lang/Exception;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // javax.xml.stream.FactoryConfigurationError this
        start local 1 // java.lang.Exception e
         0: .line 32
            aload 0 /* this */
            invokespecial java.lang.Error.<init>:()V
         1: .line 33
            aload 0 /* this */
            aload 1 /* e */
            putfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
         2: .line 34
            return
        end local 1 // java.lang.Exception e
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Ljavax/xml/stream/FactoryConfigurationError;
            0    3     1     e  Ljava/lang/Exception;
    MethodParameters:
      Name  Flags
      e     

  public void <init>(java.lang.Exception, java.lang.String);
    descriptor: (Ljava/lang/Exception;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // javax.xml.stream.FactoryConfigurationError this
        start local 1 // java.lang.Exception e
        start local 2 // java.lang.String msg
         0: .line 37
            aload 0 /* this */
            aload 2 /* msg */
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
         1: .line 38
            aload 0 /* this */
            aload 1 /* e */
            putfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
         2: .line 39
            return
        end local 2 // java.lang.String msg
        end local 1 // java.lang.Exception e
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Ljavax/xml/stream/FactoryConfigurationError;
            0    3     1     e  Ljava/lang/Exception;
            0    3     2   msg  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      e     
      msg   

  public void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // javax.xml.stream.FactoryConfigurationError this
        start local 1 // java.lang.String msg
         0: .line 42
            aload 0 /* this */
            aload 1 /* msg */
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
         1: .line 43
            return
        end local 1 // java.lang.String msg
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Ljavax/xml/stream/FactoryConfigurationError;
            0    2     1   msg  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      msg   

  public void <init>(java.lang.String, java.lang.Exception);
    descriptor: (Ljava/lang/String;Ljava/lang/Exception;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // javax.xml.stream.FactoryConfigurationError this
        start local 1 // java.lang.String msg
        start local 2 // java.lang.Exception e
         0: .line 46
            aload 0 /* this */
            aload 1 /* msg */
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
         1: .line 47
            aload 0 /* this */
            aload 2 /* e */
            putfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
         2: .line 48
            return
        end local 2 // java.lang.Exception e
        end local 1 // java.lang.String msg
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Ljavax/xml/stream/FactoryConfigurationError;
            0    3     1   msg  Ljava/lang/String;
            0    3     2     e  Ljava/lang/Exception;
    MethodParameters:
      Name  Flags
      msg   
      e     

  public java.lang.Exception getException();
    descriptor: ()Ljava/lang/Exception;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // javax.xml.stream.FactoryConfigurationError this
         0: .line 51
            aload 0 /* this */
            getfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
            areturn
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljavax/xml/stream/FactoryConfigurationError;

  public java.lang.String getMessage();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=1
        start local 0 // javax.xml.stream.FactoryConfigurationError this
         0: .line 55
            aload 0 /* this */
            invokespecial java.lang.Error.getMessage:()Ljava/lang/String;
            astore 1 /* msg */
        start local 1 // java.lang.String msg
         1: .line 56
            aload 1 /* msg */
            ifnull 3
         2: .line 57
            aload 1 /* msg */
            areturn
         3: .line 59
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* this */
            getfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
            ifnull 7
         4: .line 60
            aload 0 /* this */
            getfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
            invokevirtual java.lang.Exception.getMessage:()Ljava/lang/String;
            astore 1 /* msg */
         5: .line 61
            aload 1 /* msg */
            ifnonnull 7
         6: .line 62
            aload 0 /* this */
            getfield javax.xml.stream.FactoryConfigurationError.nested:Ljava/lang/Exception;
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.toString:()Ljava/lang/String;
            astore 1 /* msg */
         7: .line 64
      StackMap locals:
      StackMap stack:
            aload 1 /* msg */
            areturn
        end local 1 // java.lang.String msg
        end local 0 // javax.xml.stream.FactoryConfigurationError this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  this  Ljavax/xml/stream/FactoryConfigurationError;
            1    8     1   msg  Ljava/lang/String;
}
SourceFile: "FactoryConfigurationError.java"