/**
* Constructs a new file based on data in <code>in</code>.
*
* @param in the input stream to be decoded
* @throws IOException if decoding fails
*/
public DG_3_FILE(InputStream in) throws IOException {
BERTLVInputStream tlvIn = new BERTLVInputStream(in);
int tag = tlvIn.readTag();
if (tag != FileStructure.EF_DG3_TAG) {
throw new IllegalArgumentException("Expected EF_DG3_TAG");
}
isSourceConsistent = false;
tlvIn.readLength();
byte[] valueBytes = tlvIn.readValue();
BERTLVObject mainObject = new BERTLVObject(tag, valueBytes);
BERTLVObject tagsObject = mainObject.getSubObject(TAGS_TAG);
byte[] tags = (byte[]) tagsObject.getValue();
String tagString = Hex.bytesToHexString(tags);
for (int i = 0; i < (tags.length / 2); i++) {
String num = tagString.substring(i * 4, (i + 1) * 4);
short tagNum = Hex.hexStringToShort(num);
tagList.add(new Integer(tagNum));
BERTLVObject o = mainObject.getSubObject(tagNum);
byte[] value = (byte[]) o.getValue();
switch (tagNum) {
case EMTRY_TAG:
emtry = new String(value);
break;
default:
throw new IOException("Unexpected tag.");
}
}
}
/** Gets the BERTLV encoded version of this file. */
public byte[] getEncoded() {
if (isSourceConsistent) {
return sourceObject.getEncoded();
}
try {
Iterator<Integer> it = tagList.iterator();
String tagValues = "";
Vector<BERTLVObject> objs = new Vector<BERTLVObject>();
while (it.hasNext()) {
short tag = it.next().shortValue();
tagValues += Hex.shortToHexString(tag);
byte[] value = null;
switch (tag) {
case EMTRY_TAG:
value = emtry.getBytes();
break;
default:
break;
}
BERTLVObject o = new BERTLVObject(tag, value);
objs.add(o);
}
BERTLVObject result =
new BERTLVObject(EF_DG3_TAG, new BERTLVObject(TAGS_TAG, Hex.hexStringToBytes(tagValues)));
Iterator<BERTLVObject> i = objs.iterator();
while (i.hasNext()) {
result.addSubObject(i.next());
}
result.reconstructLength();
sourceObject = result;
isSourceConsistent = true;
return result.getEncoded();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}