*
 * @see javax.xml.xpath.XPath
 * @see javax.xml.xpath.XPathFactory
 * @see javax.xml.xpath.XPathExpressionException
 */
public class XPathAPI {

    private final XPath xPath;

    /**
     * Creates a new XPathAPI instance.
     */
    public XPathAPI() {
        xPath = createXPath(f -> {});
    }

    /**

    }

    /**
     * Adds a metadata field with its corresponding XPath expression for extraction.
     *
     * @param name the name of the metadata field
     * @param xpath the XPath expression to extract the metadata value
     */
    public void addMetadata(final String name, final String xpath) {
        metadataXpathMap.put(name, xpath);
    }

    /*
     * (non-Javadoc)
     *
     * @see

        }

        // xpath.*
        public static class XPath {
            public static final String DEFAULT_LANG = "default.lang";
            public static final String DEFAULT_CONTENT = "default.content";
            public static final String DEFAULT_DIGEST = "default.digest";
            // xapth.<field>=<value>
        }

        // config.*

/**
 * Utility class for parameter operations.
 */
public class ParameterUtil {
    private static final String CIPHER_PREFIX = "{cipher}";

    /** The XPath field prefix. */
    protected static final String XPATH_PREFIX = "field.xpath.";

    /** The meta field prefix. */
    protected static final String META_PREFIX = "field.meta.";

    /** The value field prefix. */

## Order matters { #order-matters }

When creating *path operations*, you can find situations where you have a fixed path.

Like `/users/me`, let's say that it's to get data about the current user.

And then you can also have a path `/users/{user_id}` to get data about a specific user by some user ID.

## El orden importa

Al crear *path operations*, puedes encontrarte en situaciones donde tienes un path fijo.

Como `/users/me`, imaginemos que es para obtener datos sobre el usuario actual.

Y luego también puedes tener un path `/users/{user_id}` para obtener datos sobre un usuario específico por algún ID de usuario.

}
```

## Parameter path berisi path

Misalkan terdapat *operasi path* dengan path `/files/{file_path}`.

Tetapi anda memerlukan `file_path` itu berisi *path*, seperti like `home/johndoe/myfile.txt`.

Sehingga URL untuk file tersebut akan seperti: `/files/home/johndoe/myfile.txt`.

### Dukungan OpenAPI

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]
}
```

↩️ ➡ 🔢 `item_id` ✔️ 💲 `"foo"`, ❔ 🚫 `int`.

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]
}
```

문서에 매개변수에 경로가 포함되어야 한다는 정보가 명시되지는 않지만 여전히 작동합니다.

### 경로 변환기

Starlette의 옵션을 직접 이용하여 다음과 같은 URL을 사용함으로써 *path*를 포함하는 *경로 매개변수*를 선언할 수 있습니다:

```
/files/{file_path:path}
```

이러한 경우 매개변수의 이름은 `file_path`이며, 마지막 부분 `:path`는 매개변수가 *경로*와 일치해야 함을 명시합니다.

따라서 다음과 같이 사용할 수 있습니다:

{* ../../docs_src/path_params/tutorial004.py hl[6] *}

/// tip | 팁