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 org.w3c.css.sac.CSSException extends java.lang.RuntimeException
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.w3c.css.sac.CSSException
  super_class: java.lang.RuntimeException
{
  protected java.lang.String s;
    descriptor: Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED

  public static final short SAC_UNSPECIFIED_ERR;
    descriptor: S
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  public static final short SAC_NOT_SUPPORTED_ERR;
    descriptor: S
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  public static final short SAC_SYNTAX_ERR;
    descriptor: S
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 2

  protected static final java.lang.String S_SAC_UNSPECIFIED_ERR;
    descriptor: Ljava/lang/String;
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: "unknown error"

  protected static final java.lang.String S_SAC_NOT_SUPPORTED_ERR;
    descriptor: Ljava/lang/String;
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: "not supported"

  protected static final java.lang.String S_SAC_SYNTAX_ERR;
    descriptor: Ljava/lang/String;
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: "syntax error"

  protected java.lang.Exception e;
    descriptor: Ljava/lang/Exception;
    flags: (0x0004) ACC_PROTECTED

  protected short code;
    descriptor: S
    flags: (0x0004) ACC_PROTECTED

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.w3c.css.sac.CSSException this
         0: .line 63
            aload 0 /* this */
            invokespecial java.lang.RuntimeException.<init>:()V
         1: .line 64
            return
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/w3c/css/sac/CSSException;

  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 // org.w3c.css.sac.CSSException this
        start local 1 // java.lang.String s
         0: .line 69
            aload 0 /* this */
            invokespecial java.lang.RuntimeException.<init>:()V
         1: .line 70
            aload 0 /* this */
            iconst_0
            putfield org.w3c.css.sac.CSSException.code:S
         2: .line 71
            aload 0 /* this */
            aload 1 /* s */
            putfield org.w3c.css.sac.CSSException.s:Ljava/lang/String;
         3: .line 72
            return
        end local 1 // java.lang.String s
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/w3c/css/sac/CSSException;
            0    4     1     s  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      s     

  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 // org.w3c.css.sac.CSSException this
        start local 1 // java.lang.Exception e
         0: .line 78
            aload 0 /* this */
            invokespecial java.lang.RuntimeException.<init>:()V
         1: .line 79
            aload 0 /* this */
            iconst_0
            putfield org.w3c.css.sac.CSSException.code:S
         2: .line 80
            aload 0 /* this */
            aload 1 /* e */
            putfield org.w3c.css.sac.CSSException.e:Ljava/lang/Exception;
         3: .line 81
            return
        end local 1 // java.lang.Exception e
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/w3c/css/sac/CSSException;
            0    4     1     e  Ljava/lang/Exception;
    MethodParameters:
      Name  Flags
      e     

  public void <init>(short);
    descriptor: (S)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.w3c.css.sac.CSSException this
        start local 1 // short code
         0: .line 87
            aload 0 /* this */
            invokespecial java.lang.RuntimeException.<init>:()V
         1: .line 88
            aload 0 /* this */
            iload 1 /* code */
            putfield org.w3c.css.sac.CSSException.code:S
         2: .line 89
            return
        end local 1 // short code
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/w3c/css/sac/CSSException;
            0    3     1  code  S
    MethodParameters:
      Name  Flags
      code  

  public void <init>(short, java.lang.String, java.lang.Exception);
    descriptor: (SLjava/lang/String;Ljava/lang/Exception;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // org.w3c.css.sac.CSSException this
        start local 1 // short code
        start local 2 // java.lang.String s
        start local 3 // java.lang.Exception e
         0: .line 97
            aload 0 /* this */
            invokespecial java.lang.RuntimeException.<init>:()V
         1: .line 98
            aload 0 /* this */
            iload 1 /* code */
            putfield org.w3c.css.sac.CSSException.code:S
         2: .line 99
            aload 0 /* this */
            aload 2 /* s */
            putfield org.w3c.css.sac.CSSException.s:Ljava/lang/String;
         3: .line 100
            aload 0 /* this */
            aload 3 /* e */
            putfield org.w3c.css.sac.CSSException.e:Ljava/lang/Exception;
         4: .line 101
            return
        end local 3 // java.lang.Exception e
        end local 2 // java.lang.String s
        end local 1 // short code
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/w3c/css/sac/CSSException;
            0    5     1  code  S
            0    5     2     s  Ljava/lang/String;
            0    5     3     e  Ljava/lang/Exception;
    MethodParameters:
      Name  Flags
      code  
      s     
      e     

  public java.lang.String getMessage();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.w3c.css.sac.CSSException this
         0: .line 110
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.s:Ljava/lang/String;
            ifnull 2
         1: .line 111
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.s:Ljava/lang/String;
            areturn
         2: .line 112
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.e:Ljava/lang/Exception;
            ifnull 4
         3: .line 113
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.e:Ljava/lang/Exception;
            invokevirtual java.lang.Exception.getMessage:()Ljava/lang/String;
            areturn
         4: .line 115
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.code:S
            tableswitch { // 0 - 2
                    0: 5
                    1: 6
                    2: 7
              default: 8
          }
         5: .line 117
      StackMap locals:
      StackMap stack:
            ldc "unknown error"
            areturn
         6: .line 119
      StackMap locals:
      StackMap stack:
            ldc "not supported"
            areturn
         7: .line 121
      StackMap locals:
      StackMap stack:
            ldc "syntax error"
            areturn
         8: .line 123
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Lorg/w3c/css/sac/CSSException;

  public short getCode();
    descriptor: ()S
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.w3c.css.sac.CSSException this
         0: .line 132
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.code:S
            ireturn
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/w3c/css/sac/CSSException;

  public java.lang.Exception getException();
    descriptor: ()Ljava/lang/Exception;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.w3c.css.sac.CSSException this
         0: .line 139
            aload 0 /* this */
            getfield org.w3c.css.sac.CSSException.e:Ljava/lang/Exception;
            areturn
        end local 0 // org.w3c.css.sac.CSSException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/w3c/css/sac/CSSException;
}
SourceFile: "CSSException.java"