}
            }
        };
        Optional<Activation> root = Optional.of(activation);
        stk.push(new ActivationFrame("activation", root));
        root.map(Activation::getFile).ifPresent(fa -> {
            stk.push(new ActivationFrame("file", Optional.of(fa)));
            stk.push(new ActivationFrame("exists", Optional.empty()));
            validator.accept(fa.getExists());

 */
package org.apache.maven.api.services;

import java.io.Closeable;
import java.net.URI;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.util.Optional;

import org.apache.maven.api.RemoteRepository;
import org.apache.maven.api.annotations.Consumer;
import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**

                default:
                    // could not parse expression
                    return null;
            }
        }

        if (value instanceof Optional<?> optional) {
            value = optional.orElse(null);
        }
        return value;
    }

    private static Object getMappedValue(

- **路径**中声明了相同参数的参数，是路径参数
- 类型是（`int`、`float`、`str`、`bool` 等）**单类型**的参数，是**查询**参数
- 类型是 **Pydantic 模型**的参数，是**请求体**

/// note | 笔记

因为默认值是 `None`， FastAPI 会把 `q` 当作可选参数。

FastAPI 不使用 `Optional[str]` 中的 `Optional`， 但 `Optional` 可以让编辑器提供更好的支持，并检测错误。

///

## 不使用 Pydantic

    }

    /**
     * Implementation method for reading an XML node from an input stream.
     *
     * @param input the input stream to read from
     * @param locationBuilder optional builder for creating input location objects
     * @return the parsed XML node
     * @throws XMLStreamException if there is an error parsing the XML
     */

- [ ] Run `mvn dbflute:freegen` to regenerate Java classes
- [ ] Run `mvn clean package` to rebuild project
- [ ] Test language selection in admin UI
- [ ] (Optional) Configure OpenSearch analyzers in `fess.json`
- [ ] (Optional) Add custom dictionaries for search analysis
- [ ] Verify all UI pages display correctly in new language
- [ ] Test error messages and form validation

      </dependency>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t07-d</artifactId>
        <version>1.0</version>
        <scope>test</scope>
        <optional>false</optional>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t07-a</artifactId>
      <version>1.0</version>

            }

            @Override
            public <T> Optional<T> lookupOptional(Class<T> type) {
                return Optional.empty();
            }

            @Override
            public <T> Optional<T> lookupOptional(Class<T> type, String name) {
                return Optional.empty();
            }

            @Override

            "timestamp": "2023-01-01T12:00:00",
            "description": "An optional description",
        },
    )
    assert response.status_code == 200
    assert "123" in fake_db
    assert fake_db["123"] == {
        "title": "Foo",
        "timestamp": "2023-01-01T12:00:00",
        "description": "An optional description",
    }


def test_put_invalid_data(client: TestClient, mod: ModuleType):

import org.codelibs.fess.opensearch.config.exentity.WebConfig;
import org.codelibs.fess.util.ParameterUtil;
import org.dbflute.cbean.result.ListResultBean;
import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing web crawling configurations.
 * Provides CRUD operations for web configuration settings including