package com.oreilly.jent.jndi;

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 * In general, you may use the code in this book in your programs and 
 * documentation. You do not need to contact us for permission unless 
 * you're reproducing a significant portion of the code. For example, 
 * writing a program that uses several chunks of code from this book does 
 * not require permission. Selling or distributing a CD-ROM of examples 
 * from O'Reilly books does require permission. Answering a question by 
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 * your product's documentation does require permission.
 * 
 * We appreciate, but do not require, attribution. An attribution usually 
 * includes the title, author, publisher, and ISBN. For example: 
 * 
 *   "Java Enterprise in a Nutshell, Third Edition, 
 *    by Jim Farley and William Crawford 
 *    with Prakash Malani, John G. Norman, and Justin Gehtland. 
 *    Copyright 2006 O'Reilly Media, Inc., 0-596-10142-2."
 *  
 *  If you feel your use of code examples falls outside fair use or the 
 *  permission given above, feel free to contact us at 
 *  permissions@oreilly.com.
 */

/**
 * listattrs: Command to list the attributes of a given directory context.
 */

import java.util.Vector;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;

class listattrs implements Command {
  public void execute(Context c, Vector v) throws CommandException {
        
    String name = "";
        
    // An empty string is OK for a listattrs operation
    // as it means list attributes of the current context
    if (!(v.isEmpty()))
      name = (String)v.firstElement();
        
    if (NamingShell.getCurrentContext() == null)
      throw new CommandException(new Exception(), "No current context");       

    try {
      // Get the Attributes and then get enumeration of Attribute objects
      Attributes attrs = ((DirContext)c).getAttributes(name);
      NamingEnumeration allAttr = attrs.getAll();
      while (allAttr.hasMore()) {
        Attribute attr = (Attribute)allAttr.next();
        System.out.println("Attribute: " + attr.getID());
                
        // Note that this can return human-unreadable garbage
        NamingEnumeration values = attr.getAll();
        while (values.hasMore())
          System.out.println("Value: " + values.next());
      }
    }
    catch (NamingException e) {
      throw new CommandException(e, "Couldn't list attributes of " + name);
    }
    catch (ClassCastException cce) {
      throw new CommandException(cce, "Not a directory context");
    }
  }

  public void help() { System.out.println("Usage: listattrs [name]"); }
}