GroupDescriptor.java

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class GroupDescriptor {
    private ByteBuffer byteBuffer;
    private int inodeTablePointers[];
    private int inodeTablePointersLocations[];

    public GroupDescriptor(Ext2File file, int blocksCount) throws IOException {
        byteBuffer = ByteBuffer.wrap(file.read(2048, 1024)).order(ByteOrder.LITTLE_ENDIAN);
        inodeTablePointers = new int[blocksCount];
        inodeTablePointersLocations = new int[blocksCount];

        for (int i = 0; i < blocksCount; i++) {
            inodeTablePointers[i] = byteBuffer.getInt((i * Constants.GROUP_DESCRIPTOR_LENGTH) + Constants.INODE_TABLE_POINTER_OFFSET);
            inodeTablePointersLocations[i] = 2048 + (i * Constants.GROUP_DESCRIPTOR_LENGTH) + Constants.INODE_TABLE_POINTER_OFFSET;
        }

        System.out.println(this);
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("\n====================GROUP DESCRIPTOR CONTENT====================");
        
        for (int i = 0; i < inodeTablePointers.length; i++) 
            sb.append("\nInode Table Pointer " + i + ": " + inodeTablePointers[i]);
        
        sb.append("\n================================================================");
        return sb.toString();
    }

    public int[] getInodeTablePointers() {
        return inodeTablePointers;
    }

    public int[] getInodeTablePointersLocations() {
        return inodeTablePointersLocations;
    }
}