Example 1 with Tokenizer
use of net.sourceforge.sqlexplorer.parsers.Tokenizer in project tdq-studio-se by Talend.
the class StructuredCommentParser method createCommand.
/**
* Attempts to create a AbstractCommand from a comment token
* @param comment the comment to parse
* @return the new AbstractCommand, or null if it is not a structured comment
* @throws StructuredCommentException
*/
protected Command createCommand(Token comment) throws ParserException {
StringBuffer sb = new StringBuffer(comment);
sb.delete(0, 2);
if (comment.getTokenType() == TokenType.ML_COMMENT)
sb.delete(sb.length() - 2, sb.length());
// Make sure it begins ${, but silently ignore it if not
int pos = sb.indexOf("}", 2);
if (sb.length() < 3 || !sb.substring(0, 2).equals("${") || pos < 0)
return null;
// Extract the command (ie the bit between "${" and "}") and the data (the bit after the "}")
String data = null;
if (pos < sb.length()) {
data = sb.substring(pos + 1).trim();
if (data.length() == 0)
data = null;
}
sb = new StringBuffer(sb.substring(2, pos));
// ...and has a word as the first token
Tokenizer tokenizer = new Tokenizer(sb);
Token token = tokenizer.nextToken();
if (token == null)
return null;
if (token.getTokenType() != TokenType.WORD)
throw new StructuredCommentException("Unexpected command in structured comment: " + token.toString(), comment);
// Create a new AbstractCommand
CommandType type;
try {
// I've kept the determination of CommandType outside of the constructor in case we want
// to instantiate different classes for the different commands.
type = CommandType.valueOf(token.toString().toUpperCase());
} catch (IllegalArgumentException e) {
throw new StructuredCommentException("Unrecognised structured comment command \"" + token.toString() + "\"", comment);
}
return type.createInstance(this, comment, tokenizer, data);
}