@Override
public LogQueryCommand parse(LogQueryContext context, String commandString) {
if (commandString.trim().endsWith(","))
throw new LogQueryParseException("missing-field", commandString.length());
QueryTokens tokens = QueryTokenizer.tokenize(commandString);
List<String> fields = new ArrayList<String>();
String csvPath = tokens.firstArg();
List<QueryToken> fieldTokens = tokens.subtokens(2, tokens.size());
for (QueryToken t : fieldTokens) {
StringTokenizer tok = new StringTokenizer(t.token, ",");
while (tok.hasMoreTokens()) fields.add(tok.nextToken().trim());
}
if (fields.size() == 0)
throw new LogQueryParseException("missing-field", commandString.length());
File csvFile = new File(csvPath);
if (csvFile.exists())
throw new IllegalStateException("csv file exists: " + csvFile.getAbsolutePath());
try {
if (csvFile.getParentFile() != null) csvFile.getParentFile().mkdirs();
return new OutputCsv(csvFile, fields);
} catch (IOException e) {
throw new LogQueryParseException("io-error", -1, e.getMessage());
}
}
@Override
public LogQueryCommand parse(LogQueryContext context, String commandString) {
// find assignment symbol
int p = QueryTokenizer.findKeyword(commandString, "=");
if (p < 0) throw new LogQueryParseException("assign-token-not-found", commandString.length());
String field = commandString.substring(COMMAND.length(), p).trim();
String exprToken = commandString.substring(p + 1).trim();
if (field.isEmpty())
throw new LogQueryParseException("field-name-not-found", commandString.length());
if (exprToken.isEmpty())
throw new LogQueryParseException("expression-not-found", commandString.length());
Expression expr = ExpressionParser.parse(exprToken);
return new Eval(field, expr);
}
