import org.eclipse.aether.metadata.AbstractMetadata;
import org.eclipse.aether.metadata.MergeableMetadata;

/**
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Deprecated(since = "4.0.0")
abstract class MavenMetadata extends AbstractMetadata implements MergeableMetadata {

    static final String MAVEN_METADATA_XML = "maven-metadata.xml";

    protected Metadata metadata;

    private final Path path;

 * Remote snapshot metadata converts artifact on-the-fly to use timestamped snapshot version, and enlist it accordingly.
 *
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Deprecated(since = "4.0.0")
class RemoteSnapshotMetadataGenerator implements MetadataGenerator {

    private final Map<Object, RemoteSnapshotMetadata> snapshots;

    private final Date timestamp;

    private final Integer buildNumber;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 */
class MavenPluginValidatorTest extends AbstractCoreMavenComponentTestCase {
    @Inject
    private MavenPluginValidator mavenPluginValidator;

    protected String getProjectsDirectory() {

/**
 * A facade that provides lifecycle services to components outside Maven core.
 *
 */
public interface LifecycleExecutor {

    // USED BY MAVEN HELP PLUGIN
    @Deprecated
    String ROLE = LifecycleExecutor.class.getName();

    // For a given project packaging find all the plugins that are bound to any registered
    // lifecycles. The project builder needs to now what default plugin information needs to be

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import java.net.*;
import java.io.*;
import java.nio.channels.*;
import java.util.Properties;

public class MavenWrapperDownloader {

    private static final String WRAPPER_VERSION = "0.5.6";
    /**
     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
     */

{* ../../docs_src/response_model/tutorial002_py310.py hl[7,9] *}

/// info

To use `EmailStr`, first install <a href="https://github.com/JoshData/python-email-validator" class="external-link" target="_blank">`email-validator`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console

///

`status_code` 参数接收表示 HTTP 状态码的数字。

/// info | 说明

`status_code` 还能接收 `IntEnum` 类型，比如 Python 的 <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>。

///

它可以：

* 在响应中返回状态码
* 在 OpenAPI 概图（及用户界面）中存档：

<img src="/img/tutorial/response-status-code/image01.png">

/// note | 笔记

from typing import Union

from fastapi import FastAPI
from fastapi.encoders import jsonable_encoder
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: Union[str, None] = None
    description: Union[str, None] = None
    price: Union[float, None] = None
    tax: float = 10.5
    tags: list[str] = []


items = {
    "foo": {"name": "Foo", "price": 50.2},

from fastapi.responses import StreamingResponse
from sqlmodel import Field, Session, SQLModel, create_engine

engine = create_engine("postgresql+psycopg://postgres:postgres@localhost/db")


class User(SQLModel, table=True):
    id: int | None = Field(default=None, primary_key=True)
    name: str


app = FastAPI()


def get_session():
    with Session(engine) as session:
        yield session

import org.eclipse.aether.transfer.TransferListener;

import static java.util.Comparator.comparing;

/**
 * The Maven invoker, that expects whole Maven on classpath and invokes it.
 */
public class MavenInvoker extends LookupInvoker<MavenContext> {
    public MavenInvoker(Lookup protoLookup, @Nullable Consumer<LookupContext> contextConsumer) {
        super(protoLookup, contextConsumer);
    }

    @Override