org.apache.lucene.analysis.util

## Class FilesystemResourceLoader

- java.lang.Object
- - org.apache.lucene.analysis.util.FilesystemResourceLoader

- All Implemented Interfaces:
    ResourceLoader

      public final class FilesystemResourceLoader
      extends Object
      implements ResourceLoader

  Simple `ResourceLoader` that opens resource files from the local file system, optionally resolving against a base directory.

  This loader wraps a delegate `ResourceLoader` that is used to resolve all files, the current base directory does not contain. `newInstance(java.lang.String, java.lang.Class<T>)` is always resolved against the delegate, as a `ClassLoader` is needed.

  You can chain several `FilesystemResourceLoader`s to allow lookup of files in more than one base directory.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `FilesystemResourceLoader(Path baseDirectory)` Creates a resource loader that resolves resources against the given base directory (may be `null` to refer to CWD).
    `FilesystemResourceLoader(Path baseDirectory, ResourceLoader delegate)` Creates a resource loader that resolves resources against the given base directory (may be `null` to refer to CWD).

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `<T> Class<? extends T>` | `findClass(String cname, Class<T> expectedType)` Finds class of the name and expected type
    `<T> T` | `newInstance(String cname, Class<T> expectedType)` Creates an instance of the name and expected type
    `InputStream` | `openResource(String resource)` Opens a named resource

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### FilesystemResourceLoader

          public FilesystemResourceLoader(Path baseDirectory)

      Creates a resource loader that resolves resources against the given base directory (may be `null` to refer to CWD). Files not found in file system and class lookups are delegated to context classloader.

    - #### FilesystemResourceLoader

          public FilesystemResourceLoader(Path baseDirectory,
                                          ResourceLoader delegate)

      Creates a resource loader that resolves resources against the given base directory (may be `null` to refer to CWD). Files not found in file system and class lookups are delegated to the given delegate `ResourceLoader`.

  - ### Method Detail

    - #### openResource

          public InputStream openResource(String resource)
                                   throws IOException

      Description copied from interface: `ResourceLoader`
      Opens a named resource
      Specified by:
        `openResource` in interface `ResourceLoader`
      Throws:
        `IOException`

    - #### newInstance

          public <T> T newInstance(String cname,
                                   Class<T> expectedType)

      Description copied from interface: `ResourceLoader`
      Creates an instance of the name and expected type
      Specified by:
        `newInstance` in interface `ResourceLoader`

    - #### findClass

          public <T> Class<? extends T> findClass(String cname,
                                                  Class<T> expectedType)

      Description copied from interface: `ResourceLoader`
      Finds class of the name and expected type
      Specified by:
        `findClass` in interface `ResourceLoader`

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