00001
00004 package javax.jmdns.impl.constants;
00005
00011 public enum DNSLabel {
00015 Unknown("", 0x80),
00019 Standard("standard label", 0x00),
00023 Compressed("compressed label", 0xC0),
00027 Extended("extended label", 0x40);
00028
00032 static final int LABEL_MASK = 0xC0;
00033 static final int LABEL_NOT_MASK = 0x3F;
00034
00035 private final String _externalName;
00036
00037 private final int _index;
00038
00039 DNSLabel(String name, int index) {
00040 _externalName = name;
00041 _index = index;
00042 }
00043
00049 public String externalName() {
00050 return _externalName;
00051 }
00052
00058 public int indexValue() {
00059 return _index;
00060 }
00061
00066 public static DNSLabel labelForByte(int index) {
00067 int maskedIndex = index & LABEL_MASK;
00068 for (DNSLabel aLabel : DNSLabel.values()) {
00069 if (aLabel._index == maskedIndex) return aLabel;
00070 }
00071 return Unknown;
00072 }
00073
00078 public static int labelValue(int index) {
00079 return index & LABEL_NOT_MASK;
00080 }
00081
00082 @Override
00083 public String toString() {
00084 return this.name() + " index " + this.indexValue();
00085 }
00086
00087 }
