User.java #5

package com.perforce.api;

import java.io.*;
import java.util.*;

/*
 * Copyright (c) 2001, Perforce Software, All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * Representation of a source control user. Each instance can store one p4
 * user's information. The class methods can be used to
 * <a href="#getUser(java.lang.String)">get a particular user</a>.
 * If that user has been gotten before, their user information will not
 * be reloaded from P4. It is instead loaded from an internal HashDecay.
 * <p>
 * If the user information must be up to date, then the
 * <a href="#sync()">sync()</a> method must be called.
 * <p>
 * TBD: The current implementation does NOT handle the "reviews" information
 * for each user. Should User extend Mapping?
 *
 * @see HashDecay
 * @author <a href="mailto:david@markley.cc">David Markley</a>
 * @version $Date: 2002/02/19 $ $Revision: #5 $
 */
public final class User extends SourceControlObject {
  private String id = "";
  private String email = "";
  private String fullname = "";
  private static HashDecay users = null;

  /**
   * Default no-argument constructor.
   */
  public User() {
    super();
    getCache();
  }

  /**
   * Constructor that accepts the id of the user. This simply creates an
   * instance that has the id set. No other information in the class will be
   * present until the <a href="#sync()">sync() method is called.
   *
   * @param id  Id for the user.
   */
  public User(String id) {
    this();
    this.id = id;
  }

  private static HashDecay setCache() {
    if (null == users) {
      users = new HashDecay(600000);
      users.start();
    }
    return users;
  }

  public HashDecay getCache() {
    return setCache();
  }

  /**
   * Sets the id for this user.
   *
   * @param id  Id for the user.
   */
  public void setId(String id) {
    this.id = id;
  }

  /**
   * Returns an <code>Enumeration</code> of all <code>User</code> objects.
   */
  public static synchronized Enumeration getUsers() {
    return getUsers(null);
  }

  /**
   * Returns an <code>Enumeration</code> of all <code>User</code> objects.
   */
  public static synchronized Enumeration getUsers(Env env) {
    String l;
    User u;
    String[] cmd = { "p4", "users" };

    try {
      P4Process p = new P4Process(env);
      p.exec(cmd);
      while (null != (l = p.readLine())) {
	if (l.startsWith("#")) { continue; }
	u = getUser(l);
	u.setEnv(env);
      }	
      p.close();
    }
    catch (IOException ex) {
    }
    
    return setCache().elements();
  }

  /**
   * Gets the user information for the specified user.
   * If that user has been gotten before, their user information will not
   * be reloaded from P4. It is instead loaded from an internal HashDecay.
   * <p>
   * If the user information must be up to date, then the
   * <a href="#sync()">sync() method must be called.
   *
   * @deprecated Use method with Env parameter.
   * @param uid  User id that is requested.
   */
  public static synchronized User getUser(String uid) {
    return getUser(null, uid);
  }

  /**
   * Gets the user information for the specified user.
   * If that user has been gotten before, their user information will not
   * be reloaded from P4. It is instead loaded from an internal HashDecay.
   * <p>
   * If the user information must be up to date, then the
   * <a href="#sync()">sync() method must be called.
   *
   * @param env  Source control environment to use.
   * @param uid  The user id of the user information to get from p4.
   */
  public static synchronized User getUser(Env env, String uid) {
    if (null == uid) {
      return null;
    }
    if (uid.trim().equals("")) {
      return null;
    }

    String tid;
    int i, left = 0;
    uid = uid.trim();
    if (-1 == (left = uid.indexOf("<"))) {
      tid = uid;
    } else {
      tid = uid.substring(0,left-1).trim();
    }
    User u = (User)setCache().get(uid);
    if (null != u) {
      return u;
    } else {
      u = new User(tid);
    }
    u.setEmail(tid);
    u.setFullName(tid);
    if (-1 != left) {
      uid = uid.substring(left+1);
      char[] ch = uid.toCharArray();
      left = 0;
      for (i = 0; i < ch.length; i++) {
	switch (ch[i]) {
	case '>':
	  u.setEmail(new String(ch,left,i-left));
	  break;
	case '(':
	  left = i + 1;
	  break;
	case ')':
	  u.setFullName(new String(ch,left,i-left));
	  break;
	}
      }
    }
    u.setEnv(env);
    users.put(tid,u);
    return u;
  }

  /**
   * Returns the id for this user.
   *
   * @return  Id for the user.
   */
  public String getId() {
    return id;
  }

  /**
   * Sets the e-mail address for this user.
   *
   * @param email  Email address for the user.
   */
  public void setEmail(String email) {
    this.email = email;
  }

  /**
   * Returns the e-mail address for this user.
   *
   * @return  Email address for the user.
   */
  public String getEmail() {
    return email;
  }

  /**
   * Sets the full name of this user.
   *
   * @param fullname  The full name for the user.
   */
  public void setFullName(String fullname) {
    this.fullname = fullname;
  }

  /**
   * Returns the full name of this user.
   *
   * @return  The full name for the user.
   */
  public String getFullName() {
    return fullname;
  }

  /**
   * TBD: The <code>commit</code> method is not working yet.
   */
  public void commit() {
  }

  /**
   * Synchronizes the user information with P4. This method must be called
   * to ensure that this contains the latest information from p4. This form
   * of the method can be used to change the user Id in at the same time.
   *
   * @param id  The user id for this to synchronize from p4.
   */
  public void sync(String id) {
    this.id = id;
    sync();
  }

  /**
   * Synchronizes the user information with P4. This method must be called
   * to ensure that this contains the latest information from p4.
   */
  public void sync() {
    if (! outOfSync(300000)) return;
    String l;
    String[] cmd = { "p4", "user", "-o", "id" };
    cmd[3] = id;
    
    try {
      P4Process p = new P4Process(getEnv());
      p.exec(cmd);
      while (null != (l = p.readLine())) {
	if (l.startsWith("#")) { continue; }
	if (l.startsWith("User:")) {
	  id = l.substring(6).trim();
	} else if (l.startsWith("Email:")) {
	  email = l.substring(7).trim();
	} else if (l.startsWith("FullName:")) {	
	  fullname = l.substring(10).trim();
	}
      }	
      p.close();
      inSync();
    }
    catch (IOException ex) {
    }
  }

  public String toString() {
    return id;
  }

  public String toXML() {
    StringBuffer sb = new StringBuffer("<user id=\"");
    sb.append(getId());
    sb.append("\" fullname=\"");
    sb.append(getFullName());
    sb.append("\" email=\"");
    sb.append(getEmail());
    sb.append("\"/>");
    return sb.toString();
  }

  /**
   * Used for testing.
   *
   * @deprecated  Actually in use, but this keeps it out of the docs.
   */
  public static void main (String[] argv) {
    User u;
    Env env = new Env();
    Debug.setDebugLevel(Debug.NOTICE);
    env.setUser("robot");
    env.setPort("perforce.ma.lycos.com:1666");
    Enumeration en = User.getUsers(env);
    while (en.hasMoreElements()) {
      u = (User)en.nextElement();
      System.out.println("USER: "+u.getId());
    }
  }    
}