lucene::analysis::Token* next(lucene::analysis::Token* token)
{
TCHAR ch = 0;
while (true)
{
offset++;
//
if (bufferIndex >= dataLen)
{
dataLen = input->read(ioBuffer, 1, LUCENE_IO_BUFFER_SIZE);
bufferIndex = 0;
}
//
if (dataLen == -1)
{
return NULL;
}
else
{
ch = ioBuffer[bufferIndex++];
}
if (_CJK)
{
break;
}
}
TCHAR currentWord[2] = {ch, 0};
token->set(currentWord, offset - 1, offset);
return token;
}
//这里是lucene分词器实现的最关键的地方
lucene::analysis::Token* next(lucene::analysis::Token* token)
{
TCHAR ch = 0;
while (true)
{
offset++;
//
if (bufferIndex >= dataLen)
{
dataLen = input->read(ioBuffer, 1, LUCENE_IO_BUFFER_SIZE);
bufferIndex = 0;
}
//
if (dataLen == -1)
{
return NULL;
}
else
{
ch = ioBuffer[bufferIndex++];
}
//通过这个条件不难看出这里只处理了CJK_UNIFIED_IDEOGRAPHS，
//因此会丢掉其它的字符，如它会丢掉LATIN字符和数字
if (_CJK)
{
break;
}
}
//
TCHAR currentWord[2] = {ch, 0};
token->set(currentWord, offset - 1, offset);
return token;
}
//这里是lucene分词器实现的最关键的地方
lucene::analysis::Token* next(lucene::analysis::Token* token)
{
loadWords();
std::wstring currentWord;
while (true) {
WCHAR ch;
//
if (bufferIndex >= dataLen) {
dataLen = input->read(ioBuffer, 1, LUCENE_IO_BUFFER_SIZE);
bufferIndex = 0;
}
if (dataLen == -1) {
if (currentWord.length() == 0) {
return NULL;
} else {
break;
}
}
else
{
ch = ioBuffer[bufferIndex++];
}
//通过这个条件不难看出这里只处理了CJK_UNIFIED_IDEOGRAPHS，
//因此会丢掉其它的字符，如它会丢掉LATIN字符和数字
//这也是该lucene分词器的一个限制，您可以在此基础之上完善它，
//也很欢迎把您完善的结果反馈给我
if (_CJK)
{
if (currentWord.length() == 0) {
currentWord += ch;
}
else
{
//这里实现了正向最大匹配法
std::wstring temp = currentWord;
temp += ch;
//
if (simWords->find(temp) != simWords->end())
{
currentWord = temp;
}
else
{
bufferIndex--;
break;
}
}
}
}
//
token->set(currentWord.c_str(), 0, currentWord.length());
return token;
}
