example.java

 public static String[] getExpressions(String query,StringBuilder resultQuery) throws QueryHelperException {
        int blockStart = 0;
        int blockEnd = 0;
        boolean atArg = false;
        char[] array = query.toCharArray();
        ArrayList<String> arguments = new ArrayList<>();
        for (int i = 0; i < array.length; i++) {
            if (!atArg) {
                if (array[i] == ':' && ((i - 1 >= 0 && array[i - 1] != '\\') || i == 0)) {
                    if (blockStart != blockEnd)
                        resultQuery.append(array, blockStart, blockEnd - blockStart);
                    atArg = true;
                    blockStart = i + 1;
                }
            } else {
                if (!Character.isDigit(array[i]) && !Character.isLetter(array[i]) && array[i] != '.') {
                    if (blockStart >= blockEnd) {
                        throw new QueryHelperException(
                                "expression:'" + query + "' not valid check  at position:" + i + " near:[" + new String(
                                        array, i - 5 > 0 ? i - 5 : 0, i + 5 < array.length ? 5 : array.length - i) + "]");
                    }
                    atArg = false;
                    resultQuery.append('?').append(array[i]);
                    arguments.add(new String(array, blockStart, blockEnd - blockStart));
                    blockStart = i + 1;
                }
            }
            blockEnd = i + 1;

        }
        if (blockStart != blockEnd) {
            if (atArg) {
                resultQuery.append('?');
                arguments.add(new String(array, blockStart, blockEnd - blockStart));
            } else if (blockEnd - blockStart + 1 > 0) {
                resultQuery.append(array, blockStart, blockEnd - blockStart);
            }
            return arguments.toArray(new String[] {});
        }else{
            throw new QueryHelperException("expression: [ "+query+" ], not valid");
        }

    }