- **Type Safe** - Comprehensive use of generics and modern Java type system features

### Additional Components
- **Text Processing** (`org.codelibs.core.text`) - JSON utilities, tokenization, decimal formatting, and text manipulation
- **Logging Abstraction** (`org.codelibs.core.log`) - Flexible logging system supporting JCL (Jakarta Commons Logging) and JUL (Java Util Logging)

{"message": "Hello World"}
```

...this response will return:

```json
{
  "message": "Hello World"
}
```

Of course, you will probably find much better ways to take advantage of this than formatting JSON. 😉

## Default response class { #default-response-class }

When creating a **FastAPI** class instance or an `APIRouter` you can specify which response class to use by default.

* 🔧 Add Python formatting hooks to pre-commit. PR [#4890](https://github.com/tiangolo/fastapi/pull/4890) by [@tiangolo](https://github.com/tiangolo).
* 🔧 Add pre-commit with first config and first formatting pass. PR [#4888](https://github.com/tiangolo/fastapi/pull/4888) by [@tiangolo](https://github.com/tiangolo).

		// Preserving the compression metadata.
		compressMetadata[ReservedMetadataPrefix+"compression"] = compressionAlgorithmV2
		compressMetadata[ReservedMetadataPrefix+"actual-size"] = strconv.FormatInt(actualSize, 10)

		reader = etag.NewReader(ctx, reader, nil, nil)
		wantEncryption := crypto.Requested(r.Header)
		s2c, cb := newS2CompressReader(reader, actualSize, wantEncryption)
		dstOpts.IndexCB = cb

		if v := opts.UserDefined[ReservedMetadataPrefix+"Actual-Object-Size"]; v != "" {
			fi.Metadata[ReservedMetadataPrefix+"actual-size"] = v
		}
	} else {
		fi.Metadata[ReservedMetadataPrefix+"actual-size"] = strconv.FormatInt(objectActualSize, 10)
	}

	if opts.DataMovement {
		fi.SetDataMov()
	}

	// Update all erasure metadata, make sure to not modify fields like
	// checksum which are different on each disks.

	tags["set"] = strconv.Itoa(er.setIndex)
	tags["pool"] = strconv.Itoa(er.poolIndex)
	tags["merrs"] = joinErrs(errs)
	tags["derrs"] = fmt.Sprintf("%v", dataErrsByPart)
	if m.IsValid() {
		tags["sz"] = strconv.FormatInt(m.Size, 10)
		tags["mt"] = m.ModTime.Format(iso8601Format)
		tags["d:p"] = fmt.Sprintf("%d:%d", m.Erasure.DataBlocks, m.Erasure.ParityBlocks)
	} else {
		tags["invalid"] = "1"