/**
* Method that will construct a parser (possibly a sequence) that contains all given sub-parsers.
* All parsers given are checked to see if they are sequences: and if so, they will be
* "flattened", that is, contained parsers are directly added in a new sequence instead of adding
* sequences within sequences. This is done to minimize delegation depth, ideally only having just
* a single level of delegation.
*/
public static JsonParserSequence createFlattened(
boolean checkForExistingToken, JsonParser first, JsonParser second) {
if (!(first instanceof JsonParserSequence || second instanceof JsonParserSequence)) {
return new JsonParserSequence(checkForExistingToken, new JsonParser[] {first, second});
}
ArrayList<JsonParser> p = new ArrayList<JsonParser>();
if (first instanceof JsonParserSequence) {
((JsonParserSequence) first).addFlattenedActiveParsers(p);
} else {
p.add(first);
}
if (second instanceof JsonParserSequence) {
((JsonParserSequence) second).addFlattenedActiveParsers(p);
} else {
p.add(second);
}
return new JsonParserSequence(checkForExistingToken, p.toArray(new JsonParser[p.size()]));
}
protected void addFlattenedActiveParsers(List<JsonParser> result) {
for (int i = _nextParser - 1, len = _parsers.length; i < len; ++i) {
JsonParser p = _parsers[i];
if (p instanceof JsonParserSequence) {
((JsonParserSequence) p).addFlattenedActiveParsers(result);
} else {
result.add(p);
}
}
}
@SuppressWarnings("resource")
protected void addFlattenedActiveParsers(List<JsonParser> listToAddIn) {
for (int i = _nextParserIndex - 1, len = _parsers.length; i < len; ++i) {
JsonParser p = _parsers[i];
if (p instanceof JsonParserSequence) {
((JsonParserSequence) p).addFlattenedActiveParsers(listToAddIn);
} else {
listToAddIn.add(p);
}
}
}