/**
* Propose suggestions for misspelled run-on words. This algorithm is inspired by spell.cc in
* s_fsa package by Jan Daciuk.
*
* @param original The original misspelled word.
* @return The list of suggested pairs, as space-concatenated strings.
*/
public List<String> replaceRunOnWords(final String original) {
final List<String> candidates = new ArrayList<String>();
if (!isInDictionary(
DictionaryLookup.applyReplacements(
original, dictionaryMetadata.getInputConversionPairs()))
&& dictionaryMetadata.isSupportingRunOnWords()) {
for (int i = 1; i < original.length(); i++) {
// chop from left to right
final CharSequence firstCh = original.subSequence(0, i);
if (isInDictionary(firstCh) && isInDictionary(original.subSequence(i, original.length()))) {
if (!dictionaryMetadata.getOutputConversionPairs().isEmpty()) {
candidates.add(firstCh + " " + original.subSequence(i, original.length()));
} else {
candidates.add(
DictionaryLookup.applyReplacements(
firstCh + " " + original.subSequence(i, original.length()),
dictionaryMetadata.getOutputConversionPairs())
.toString());
}
}
}
}
return candidates;
}
/**
* Find suggestions by using K. Oflazer's algorithm. See Jan Daciuk's s_fsa package, spell.cc for
* further explanation.
*
* @param w The original misspelled word.
* @return A list of suggested replacements.
*/
public List<String> findReplacements(final String w) {
String word = w;
if (!dictionaryMetadata.getInputConversionPairs().isEmpty()) {
word = DictionaryLookup.applyReplacements(w, dictionaryMetadata.getInputConversionPairs());
}
candidates.clear();
if (word.length() > 0 && word.length() < MAX_WORD_LENGTH && !isInDictionary(word)) {
List<String> wordsToCheck = new ArrayList<String>();
if (replacementsTheRest != null && word.length() > MIN_WORD_LENGTH) {
for (final String wordChecked : getAllReplacements(word, 0, 0)) {
boolean found = false;
if (isInDictionary(wordChecked)) {
candidates.add(new CandidateData(wordChecked, 0));
found = true;
} else if (dictionaryMetadata.isConvertingCase()) {
String lowerWord = wordChecked.toLowerCase(dictionaryMetadata.getLocale());
String upperWord = wordChecked.toUpperCase(dictionaryMetadata.getLocale());
if (isInDictionary(lowerWord)) {
// add the word as it is in the dictionary, not mixed-case versions of it
candidates.add(new CandidateData(lowerWord, 0));
found = true;
}
if (isInDictionary(upperWord)) {
candidates.add(new CandidateData(upperWord, 0));
found = true;
}
if (lowerWord.length() > 1) {
String firstupperWord =
Character.toUpperCase(lowerWord.charAt(0)) + lowerWord.substring(1);
if (isInDictionary(firstupperWord)) {
candidates.add(new CandidateData(firstupperWord, 0));
found = true;
}
}
}
if (!found) {
wordsToCheck.add(wordChecked);
}
}
} else {
wordsToCheck.add(word);
}
// If at least one candidate was found with the replacement pairs (which are usual errors),
// probably there is no need for more candidates
if (candidates.isEmpty()) {
int i = 1;
for (final String wordChecked : wordsToCheck) {
i++;
if (i > UPPER_SEARCH_LIMIT) { // for performance reasons, do not search too deeply
break;
}
wordProcessed = wordChecked.toCharArray();
wordLen = wordProcessed.length;
if (wordLen < MIN_WORD_LENGTH
&& i > 2) { // three-letter replacements make little sense anyway
break;
}
candidate = new char[MAX_WORD_LENGTH];
candLen = candidate.length;
effectEditDistance = wordLen <= editDistance ? wordLen - 1 : editDistance;
charBuffer = BufferUtils.clearAndEnsureCapacity(charBuffer, MAX_WORD_LENGTH);
byteBuffer = BufferUtils.clearAndEnsureCapacity(byteBuffer, MAX_WORD_LENGTH);
final byte[] prevBytes = new byte[0];
findRepl(0, fsa.getRootNode(), prevBytes, 0, 0);
}
}
}
Collections.sort(candidates);
// Use a linked set to avoid duplicates and preserve the ordering of candidates.
final Set<String> candStringSet = new LinkedHashSet<String>();
for (final CandidateData cd : candidates) {
candStringSet.add(
DictionaryLookup.applyReplacements(
cd.getWord(), dictionaryMetadata.getOutputConversionPairs())
.toString());
}
final List<String> candStringList = new ArrayList<String>(candStringSet.size());
candStringList.addAll(candStringSet);
return candStringList;
}