final char[] data = line.toCharArray();
                int ip, i, j;
                Name name;
                NbtAddress addr;
                char c = '.';

                ip = i = 0;
                for (; i < data.length && c == '.'; i++) {
                    int b = 0x00;

                    for (; i < data.length && (c = data[i]) >= 48 && c <= 57; i++) {

And of course, it supports the same:

* data validation
* data serialization
* data documentation, etc.

This works the same way as with Pydantic models. And it is actually achieved in the same way underneath, using Pydantic.

/// info

    var id = lastId
    var type: String? = null
    val data = Buffer()

    while (true) {
      when (source.select(options)) {
        in 0..2 -> {
          completeEvent(id, type, data)
          return true
        }

        in 3..4 -> {
          source.readData(data)
        }

        in 5..7 -> {
          data.writeByte('\n'.code) // 'data' on a line of its own.
        }

        in 8..9 -> {

        pathMapPager.clear();
        return asHtml(path_AdminPathmap_AdminPathmapJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }

    /**
     * Handles search pagination and data preparation for rendering.
     *
     * @param data the render data to populate with path mapping items
     * @param form the search form containing current search criteria
     */

///

## About "Form Fields" { #about-form-fields }

The way HTML forms (`<form></form>`) sends the data to the server normally uses a "special" encoding for that data, it's different from JSON.

**FastAPI** will make sure to read that data from the right place instead of JSON.

/// note | Technical Details

Data from forms is normally encoded using the "media type" `application/x-www-form-urlencoded`.

        // Verify the decoded data matches
        assertEquals(translatedName.sid_type, decodedName.sid_type);
        // The decode process doesn't preserve the original length, it reads from the buffer
        assertNotNull(decodedName.name);
        assertNotNull(decodedName.name.buffer);
        // Buffer length is based on maximum_length/2 from the encoded data

                                                                    data-docid="${f:u(doc.doc_id)}"
                                                                    data-title="${fe:replace(doc.content_title, '<[^>]+>', '')}"
                                                                    data-url="${f:h(doc.url_link)}">

		{"DATA", "", "expect two operands for DATA"},
		{"DATA", "0", "expect two operands for DATA"},
		{"DATA", "(0), 1", "expect /size for DATA argument"},
		{"DATA", "@B(SB)/4,0", "expected '(', found B"}, // Issue 23580.
		{"DATA", "·A(SB)/4,0", "DATA value must be an immediate constant or address"},
		{"DATA", "·B(SB)/4,$0", ""},
		{"DATA", "·C(SB)/5,$0", "bad int size for DATA argument: 5"},

def test_post_body(client: TestClient):
    data = [
        {"url": "http://example.com/", "name": "Example"},
        {"url": "http://fastapi.tiangolo.com/", "name": "FastAPI"},
    ]
    response = client.post("/images/multiple", json=data)
    assert response.status_code == 200, response.text
    assert response.json() == data


def test_post_invalid_list_item(client: TestClient):
    data = [{"url": "not a valid url", "name": "Example"}]

                System.arraycopy(name, 0, dst, offset, name.length);
                offset += name.length;
            }

            // Write data if present
            if (data != null && data.length > 0) {
                System.arraycopy(data, 0, dst, offset, data.length);
                offset += data.length;
            }

            // Pad to 8-byte boundary
            while ((offset - dstIndex) % 8 != 0) {