private int getAbbreviateIndex(String uri) {
int maxLength = 0;
int abbreviateIndex = 0;
for (int x = 1; x < UriSchemeEnum.values().length; x++) {
String abbreviablePrefix = UriSchemeEnum.values()[x].getScheme();
if (uri.startsWith(abbreviablePrefix) && abbreviablePrefix.length() > maxLength) {
abbreviateIndex = x;
maxLength = abbreviablePrefix.length();
}
}
return abbreviateIndex;
}
/*
* (non-Javadoc)
*
* @see com.github.nfcforandroid.api.INfaWriter#getNdefRecord()
*/
public NdefRecord getNdefRecord() {
if (!(record instanceof UriRecord)) {
throw new IllegalArgumentException("Expected UriRecord but got : " + record.getClass());
}
String uri = record.getUri().toString();
byte[] uriAsBytes = getUriAsBytes(uri);
int abbreviateIndex = getAbbreviateIndex(uri.toLowerCase());
int uriCopyOffset = UriSchemeEnum.values()[abbreviateIndex].getScheme().length();
byte[] payload = new byte[uriAsBytes.length + 1 - uriCopyOffset];
payload[0] = (byte) abbreviateIndex;
System.arraycopy(uriAsBytes, uriCopyOffset, payload, 1, uriAsBytes.length - uriCopyOffset);
NdefRecord ndefRecord =
new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_URI, record.getId(), payload);
return ndefRecord;
}