Esempio n. 1
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 /**
  * Parses and returns a number.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @return name
  * @throws QueryException query exception
  */
 private String number(final Cmd cmd) throws QueryException {
   consumeWS();
   final StringBuilder sb = new StringBuilder();
   if (parser.curr() == '-') sb.append(parser.consume());
   while (digit(parser.curr())) sb.append(parser.consume());
   return finish(eoc() || ws(parser.curr()) ? sb : null, cmd);
 }
Esempio n. 2
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 /**
  * Parses and returns a command. A command is limited to letters.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @return name
  * @throws QueryException query exception
  */
 private String command(final Cmd cmd) throws QueryException {
   consumeWS();
   final StringBuilder sb = new StringBuilder();
   while (!eoc() && !ws(parser.curr())) {
     sb.append(parser.consume());
   }
   return finish(sb, cmd);
 }
Esempio n. 3
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 /**
  * Parses and returns a glob expression, which extends {@link #name(Cmd)} function with asterisks,
  * question marks and commands.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @return glob expression
  * @throws QueryException query exception
  */
 private String glob(final Cmd cmd) throws QueryException {
   consumeWS();
   final StringBuilder sb = new StringBuilder();
   while (true) {
     final char ch = parser.curr();
     if (!Databases.validChar(ch) && ch != '*' && ch != '?' && ch != ',') {
       return finish(eoc() || ws(ch) ? sb : null, cmd);
     }
     sb.append(parser.consume());
   }
 }
Esempio n. 4
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 /**
  * Parses and returns the specified keyword.
  *
  * @param key token to be parsed
  * @param cmd referring command; if specified, the keyword is mandatory
  * @return result of check
  * @throws QueryException query exception
  */
 private boolean key(final String key, final Cmd cmd) throws QueryException {
   consumeWS();
   final int p = parser.pos;
   final boolean ok =
       (parser.consume(key) || parser.consume(key.toLowerCase(Locale.ENGLISH)))
           && (parser.curr(0) || ws(parser.curr()));
   if (!ok) {
     parser.pos = p;
     if (cmd != null) throw help(null, cmd);
   }
   return ok;
 }
Esempio n. 5
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 /**
  * Parses and returns a string, delimited by a semicolon or, optionally, a space. Quotes can be
  * used to include spaces.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @param space stop when encountering space
  * @return string
  * @throws QueryException query exception
  */
 private String string(final Cmd cmd, final boolean space) throws QueryException {
   final StringBuilder sb = new StringBuilder();
   consumeWS();
   boolean q = false;
   while (parser.more()) {
     final char c = parser.curr();
     if (!q && ((space ? c <= ' ' : c < ' ') || eoc())) break;
     if (c == '"') q ^= true;
     else sb.append(c);
     parser.consume();
   }
   return finish(sb, cmd);
 }
Esempio n. 6
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 @Override
 protected void parse(final ArrayList<Command> cmds) throws QueryException {
   final Scanner sc = new Scanner(string).useDelimiter(single ? "\0" : "\r\n?|\n");
   while (sc.hasNext()) {
     final String line = sc.next().trim();
     if (line.isEmpty() || line.startsWith("#")) continue;
     parser = new InputParser(line);
     parser.file = ctx.options.get(MainOptions.QUERYPATH);
     while (parser.more()) {
       final Cmd cmd = consume(Cmd.class, null);
       if (cmd != null) cmds.add(parse(cmd));
       if (parser.more() && !parser.consume(';')) throw help(null, cmd);
     }
   }
 }
Esempio n. 7
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 /**
  * Parses and returns the remaining string. Quotes at the beginning and end of the argument will
  * be stripped.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @return remaining string
  * @throws QueryException query exception
  */
 private String remaining(final Cmd cmd) throws QueryException {
   if (single) {
     final StringBuilder sb = new StringBuilder();
     consumeWS();
     while (parser.more()) sb.append(parser.consume());
     String arg = finish(sb, cmd);
     if (arg != null) {
       // chop quotes; substrings are faster than replaces...
       if (arg.startsWith("\"")) arg = arg.substring(1);
       if (arg.endsWith("\"")) arg = arg.substring(0, arg.length() - 1);
     }
     return arg;
   }
   return string(cmd, false);
 }
Esempio n. 8
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 /**
  * Parses and returns an xquery expression.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @return path
  * @throws QueryException query exception
  */
 private String xquery(final Cmd cmd) throws QueryException {
   consumeWS();
   final StringBuilder sb = new StringBuilder();
   if (!eoc()) {
     final QueryContext qc = new QueryContext(ctx);
     try {
       final QueryParser p = new QueryParser(parser.input, null, qc, null);
       p.pos = parser.pos;
       p.parseMain();
       sb.append(parser.input.substring(parser.pos, p.pos));
       parser.pos = p.pos;
     } finally {
       qc.close();
     }
   }
   return finish(sb, cmd);
 }
Esempio n. 9
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 /**
  * Returns a query exception instance.
  *
  * @param comp input completions
  * @param msg message
  * @param ext extension
  * @return query exception
  */
 private QueryException error(final Enum<?>[] comp, final String msg, final Object... ext) {
   return new QueryException(parser.info(), new QNm(), msg, ext).suggest(parser, list(comp));
 }
Esempio n. 10
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 /**
  * Checks if the end of a command has been reached.
  *
  * @return true if command has ended
  */
 private boolean eoc() {
   return !parser.more() || parser.curr() == ';';
 }
Esempio n. 11
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 /** Consumes all whitespace characters from the beginning of the remaining query. */
 private void consumeWS() {
   while (parser.pos < parser.length && parser.input.charAt(parser.pos) <= ' ') ++parser.pos;
   parser.mark = parser.pos - 1;
 }
Esempio n. 12
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 /**
  * Parses and returns a name. A name may contain letters, numbers and any of the special
  * characters <code>!#$%&'()+-=@[]^_`{}~</code>.
  *
  * @param cmd referring command; if specified, the result must not be empty
  * @return name
  * @throws QueryException query exception
  */
 private String name(final Cmd cmd) throws QueryException {
   consumeWS();
   final StringBuilder sb = new StringBuilder();
   while (Databases.validChar(parser.curr())) sb.append(parser.consume());
   return finish(eoc() || ws(parser.curr()) ? sb : null, cmd);
 }