SlottedPageStorageManager

SlottedPageStorageManager is a Java project that provides functionalities for managing storage space using the slotted page format with buffering. It includes classes and interfaces for creating and manipulating slotted pages within a file-based storage system.

Overview

The project consists of the following components:

• BufferedFileManager: A class that extends FileManager and implements buffering for efficient storage management using the slotted page format.

• FileManager: An interface defining methods for managing a storage space, such as adding, putting, getting, removing, iterating over objects, and clearing data from a file.

• SlottedPageFile: A class representing a file consisting of slotted pages. It provides methods for accessing and manipulating slotted pages within the file, including saving and retrieving objects.

• SlottedPage: A class representing a slotted page, which can store objects of possibly different sizes in a byte array. It provides methods for adding, getting, putting, removing, and iterating over objects stored in the page.

• StorageManager: An interface defining methods for managing storage space. It includes methods for adding, putting, getting, removing, iterating over objects, clearing data from a file, and handling invalid locations.

Usage

To use the SlottedPageStorageManager in your Java project, follow these steps:

1. Include the necessary Java files (BufferedFileManager.java, FileManager.java, SlottedPageFile.java, SlottedPage.java, StorageManager.java) in your project directory.

2. Import the required classes/interfaces into your Java files as needed.

3. Create an instance of BufferedFileManager or implement your own storage manager using the provided interfaces (FileManager, StorageManager).

4. Use the methods provided by the storage manager to manage storage space, add, retrieve, update, or remove objects from slotted pages.

Example

// Example usage of SlottedPageStorageManager

// Create a BufferedFileManager instance with slotted page size and buffer size
BufferedFileManager manager = new BufferedFileManager(slottedPageSize, bufferSize);

// Add objects to the storage space
int fileID = 1;
Object object = new Object();
manager.add(fileID, object);

// Retrieve an object from the storage space
Object retrievedObject = manager.get(fileID, location);

// Update an object in the storage space
Object updatedObject = new Object();
manager.put(fileID, location, updatedObject);

// Remove an object from the storage space
Object removedObject = manager.remove(fileID, location);

// Iterate over objects stored in the file
Iterator<Object> iterator = manager.iterator(fileID);
while (iterator.hasNext()) {
    Object obj = iterator.next();
    // Process each object
}

// Clear data from a file
manager.clear(fileID);