## On this page

  

 

 # Class: PHXDirectoryLibrarian

 Last update: 22.06.2026 

**Package:** `com.phoenix_int.aserver.library`

**Class Hierarchy**

```
↳ java.lang.Object
  ↳ com.phoenix_int.aserver.library.PHXDirectoryLibrarian

```

**Implemented Interfaces**

- [`IPHXLibrarian`](./IPHXLibrarian.md)

---

**Declaration**

```java
public class PHXDirectoryLibrarian
extends java.lang.Object
implements IPHXLibrarian

```

This class implements a librarian that uses a directory on disk to store and retrieve files. It provides methods for adding, removing, and finding files in the directory, as well as for managing categories and associations.

## Field Summary

Modifier and TypeField and Description`private java.io.File``directory`  
The directory used by this librarian.`private java.util.Map``categories`  
Map of categories managed by this librarian.## Constructor Summary

Constructor and Description`PHXDirectoryLibrarian(java.io.File directory)`## Method Summary

Modifier and TypeMethod and Description`void``addFile(java.io.File file)`  
Adds a file to the directory.`void``removeFile(java.io.File file)`  
Removes a file from the directory.`java.io.File``findFile(java.lang.String name)`  
Finds a file by name.`void``addCategory(java.lang.String category)`  
Adds a category.`void``removeCategory(java.lang.String category)`  
Removes a category.`java.util.List``listCategories()`  
Lists all categories.`void``addAssociation(java.lang.String key, java.lang.String value)`  
Adds an association.`void``removeAssociation(java.lang.String key)`  
Removes an association.`java.lang.String``findAssociation(java.lang.String key)`  
Finds an association by key.## Field Detail

### directory

```java
private java.io.File directory

```

The directory used by this librarian.

### categories

```java
private java.util.Map categories

```

Map of categories managed by this librarian.

## Constructor Detail

### PHXDirectoryLibrarian

```java
public PHXDirectoryLibrarian(java.io.File directory)

```

**Parameters:**

- `directory` - The directory to be used by this librarian.

## Method Detail

### addFile

```java
public void addFile(java.io.File file)

```

Adds a file to the directory.

**Parameters:**

- `file` - The file to add.

### removeFile

```java
public void removeFile(java.io.File file)

```

Removes a file from the directory.

**Parameters:**

- `file` - The file to remove.

### findFile

```java
public java.io.File findFile(java.lang.String name)

```

Finds a file by name.

**Parameters:**

- `name` - The name of the file to find.

**Returns:**

- The file if found, or null otherwise.

### addCategory

```java
public void addCategory(java.lang.String category)

```

Adds a category.

**Parameters:**

- `category` - The category to add.

### removeCategory

```java
public void removeCategory(java.lang.String category)

```

Removes a category.

**Parameters:**

- `category` - The category to remove.

### listCategories

```java
public java.util.List listCategories()

```

Lists all categories.

**Returns:**

- A list of all categories.

### addAssociation

```java
public void addAssociation(java.lang.String key, 
                           java.lang.String value)

```

Adds an association.

**Parameters:**

- `key` - The key for the association.
- `value` - The value for the association.

### removeAssociation

```java
public void removeAssociation(java.lang.String key)

```

Removes an association.

**Parameters:**

- `key` - The key for the association to remove.

### findAssociation

```java
public java.lang.String findAssociation(java.lang.String key)

```

Finds an association by key.

**Parameters:**

- `key` - The key for the association to find.

**Returns:**

- The value associated with the key, or null if not found.