package org.vamsas.client;

import java.io.File;
import java.io.IOException;

/**
 * TODO document type SimpleClientFactory
 * @author jimp
 *
 */
public class SimpleClientFactory implements IClientFactory {
 
  File sessionArena;
  
  /**
   * default constructor - called by CreateClientFactory only.
   *
   */
  public SimpleClientFactory() {
    sessionArena = null;
  }
  /**
   * Create a client factory that works with sessions at the given
   * path.
   * @param path
   */
  public SimpleClientFactory(String path) throws IOException {
    // Check path is valid and read/writeable.
    File newarena = new File(path);
    if (newarena.isDirectory() && newarena.canRead() && newarena.canWrite()) {
      sessionArena = newarena;
    } else {
      sessionArena = null;
      throw(new IOException("Cannot read and write to a directory called "+path));
    }
  }
  /* (non-Javadoc)
   * @see org.vamsas.client.IClientFactory#getIClient(org.vamsas.client.ClientHandle)
   */
  public IClient getIClient(ClientHandle applicationHandle) {
    // create a new session
    // register new ClientHandle in session
    // create Client instance
    return null;
  }

  /* (non-Javadoc)
   * @see org.vamsas.client.IClientFactory#getIClient(org.vamsas.client.ClientHandle, java.lang.String)
   */
  public IClient getIClient(ClientHandle applicationHandle, String sessionUrn) {
    // locate session from Urn
    // check that clientHandle is unique (with default user) - if not update the clientHandle urn to make it unique.
    // wait for lock and attach to session
    // create Client instance
    return null;
  }

  /* (non-Javadoc)
   * @see org.vamsas.client.IClientFactory#getIClient(org.vamsas.client.ClientHandle, org.vamsas.client.UserHandle, java.lang.String)
   */
  public IClient getIClient(ClientHandle applicationHandle, UserHandle userId,
      String sessionUrn) {
    // locate session from Urn
    // check Uniqueness of user + ClientHandle in the session. Update clientHandle urn accordingly.
    // wait for lock, attach to session
    // create client instance
    return null;
  }

  /* (non-Javadoc)
   * @see org.vamsas.client.IClientFactory#getIClient(org.vamsas.client.ClientHandle, org.vamsas.client.UserHandle)
   */
  public IClient getIClient(ClientHandle applicationHandle, UserHandle userId) {
    // create new session
    // register Client and UserHandles in session
    // create client instance
    return null;
  }

  public static void main(String[] args) {
  }
}