Package com.microej.wear.services

## Interface ExternalResourceService

-     public interface ExternalResourceService

  This service allows Features to create and delete external resources.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Interface | Description
    --- | --- | ---
    `static class` | `ExternalResourceService.ImageFormat` | Enumerates supported image formats.
    `static interface` | `ExternalResourceService.Writer` | Represents a writer to an external resource.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `ExternalResourceService.Writer` | `createExternalImage​(String path, int size, ExternalResourceService.ImageFormat imageFormat)` | Creates an external image at the given path, converting it to the given format.
    `ExternalResourceService.Writer` | `createExternalResource​(String path, int size)` | Creates an external resource at the given path.
    `boolean` | `deleteExternalResource​(String path)` | Deletes the external resource at the given path.
    `String` | `getExternalResourcePath​(String path)` | Returns the path to an external resource.

- - ### Method Detail

    - #### createExternalResource

          ExternalResourceService.Writer createExternalResource​(String path,
                                                                int size)
                                                         throws IOException

      Creates an external resource at the given path.
      Parameters:
        `path` - the path of the external resource (relative to the Module directory).
        `size` - the size of the data to be written to the external resource.
      Returns:
        a writer to the external resource.
      Throws:
        `IllegalArgumentException` - if the path does not start with a "/".
        `IllegalArgumentException` - if the size is negative.
        `IOException` - if an external resource with the same path already exists.
        `IOException` - if a writer to the same path is already opened.
        `IOException` - if there is not enough memory in the external resource location to allocate the resource.

    - #### createExternalImage

          ExternalResourceService.Writer createExternalImage​(String path,
                                                             int size,
                                                             ExternalResourceService.ImageFormat imageFormat)
                                                      throws IOException

      Creates an external image at the given path, converting it to the given format.
      Parameters:
        `path` - the path of the external resource (relative to the Module directory).
        `size` - the size of the data to be written to the external resource.
        `imageFormat` - the format to convert the image to.
      Returns:
        a writer to the external resource.
      Throws:
        `IllegalArgumentException` - if the path does not start with a "/".
        `IllegalArgumentException` - if the size is negative.
        `IOException` - if an external resource with the same path already exists.
        `IOException` - if a writer to the same path is already opened.
        `IOException` - if there is not enough memory in the external resource location to allocate the resource.

    - #### deleteExternalResource

          boolean deleteExternalResource​(String path)
                                  throws IOException

      Deletes the external resource at the given path.
      Parameters:
        `path` - the path of the external resource (relative to the Module directory).
      Returns:
        `true` if the resource was successfully deleted, `false` if no resource exists at the given path.
      Throws:
        `IllegalArgumentException` - if the path does not start with a "/".
        `IOException` - if an error occurs while deleting the resource.
        `IOException` - if a writer to the resource is currently open.

    - #### getExternalResourcePath

          String getExternalResourcePath​(String path)

      Returns the path to an external resource.
      Parameters:
        `path` - a path relative to the current context.
      Returns:
        the corresponding resource path.