package baf.sci;

import com.sun.java.swing.tree.TreeNode;
import java.io.*;
import java.util.*;

/** This class represents a single SCI resource that has not been loaded
 *  into memory.
 */
public final class ExternalResourceIndex extends ResourceIndex {

  /** Creates a ResourceIndex for an external file with the given
   *  attributes.
   */
  ExternalResourceIndex(int restype, int resnum) {
    this.restype = restype;
    this.resnum = resnum;
  }

  /** Creates a ResourceIndex for an external file with the given
   *  name.
   */
  ExternalResourceIndex(String filename) {
    int id = Resource.getID(filename);
    this.restype = Resource.getType(id);
    this.resnum = Resource.getNum(id);
  }

  public byte[] getArray() throws ResourceNotFoundException {
    try {
      InputStream in;
      int len;

      String filename = Resource.getName(restype, resnum);
      File file = new File(parent.parent.parent.file, filename);
      len = (int)(file.length()-2);
      in =  new FileInputStream(file);
      in.skip(2);

      byte[] b = new byte[len];
      new DataInputStream(in).readFully(b);
      return b;
    } catch (IOException e) {
      e.printStackTrace();
      throw new ResourceNotFoundException(restype, resnum);
    }
  }

}