Developers notes: January 2012

Wednesday, January 11, 2012

Using java formatter on web

HTML will eat spaces.. use &nbsp
To get rightly aligned columns you need to use font that is monospaced!


Formatter formatter = null;

StringBuilder sb = new StringBuilder();

sb.append("%-").append(max).append(".").append(max).append("s");

String format = sb.toString();

for (Article a : listaArtikala)

{

 // html pojede razmake - moras koristiti &nbsp i monospaced font (npr Courier)

 sb = new StringBuilder();

 formatter = new Formatter(sb);



 formatter.format(format, a.getName() + ",");

 formatter.format("%-14.14s", a.getArticlePeriod().getFormatted() + ",");

 formatter.format("%-10.10s", CurrencyUtils.formatCurrency(a.getPrice()) + "kn");

 if (log.isDebugEnabled()) log.debug(formatter.toString());



 articleTypeSIList.add(new SelectItem(a.getOid(), formatter.toString().replace(" ", "&nbsp;")));

}

Sort by 2 properties

There is list of articles that needs to be sorted by zone and then by name


List<Article> listaArtikala = articleManager.findByFilter(filter);

// sortiraj artikle po zoni

Collections.sort(listaArtikala, new Comparator<Article>()

{

 @Override

 public int compare(Article o1, Article o2)

 {

  return o1.getZone().getMark().compareTo(o2.getZone().getMark());

 }

});



// razdvoji po zoni aktikle

Map<String, List<Article>> map = new TreeMap<String, List<Article>>();

for (Article a : listaArtikala)

{

 String mark = a.getZone().getMark();

 List<Article> tempList = map.get(mark);

 if (tempList == null)

 {

  tempList = new ArrayList<Article>();

  map.put(mark, tempList);

 }

 tempList.add(a);

}

listaArtikala.clear();



// sortiraj po imenu artikla

for (String mark : map.keySet())

{

 List<Article> tempList = map.get(mark);

 Collections.sort(tempList, new Comparator<Article>()

 {

  @Override

  public int compare(Article o1, Article o2)

  {

   return o1.getName().compareTo(o2.getName());

  }

 });

 listaArtikala.addAll(tempList);

}

Thursday, January 5, 2012

Reading Active Directory

Example of reading users e-mail address from AD:


public static void main(String[] args)

{

 Hashtable env = new Hashtable(11);

 env.put(Context.SECURITY_PRINCIPAL, "userName (CN)");

 env.put(Context.SECURITY_CREDENTIALS, "pass");

 env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");

 env.put(Context.PROVIDER_URL, "ldap://serverName:389/DC=domain1,DC=hr");



 String users = "ou=Unit,ou=Organizational";

 try

 {

  DirContext ctx = new InitialDirContext(env);



  Attributes answer = null;

  String[] attrIDs = { "mail" };//Specify the ids of the attributes to return

  NamingEnumeration list = ctx.list(users);

  while (list.hasMore())

  {

   NameClassPair nc = (NameClassPair) list.next();

   System.out.println(nc.getName());

   answer = ctx.getAttributes(nc.getName() + " , " + users, attrIDs);

   for (NamingEnumeration ae = answer.getAll(); ae.hasMore();)

   {

    Attribute attr = (Attribute) ae.next();

    System.out.println("attribute: " + attr.getID());

    /* Print each value */

    for (NamingEnumeration e = attr.getAll(); e.hasMore(); System.out.println(e.next()))

     ;

   }

  }

 }

 catch (NamingException e)

 {

  System.err.println(e);

 }

}

Resources:
http://www.windowsnetworking.com/kbase/WindowsTips/Windows2000/AdminTips/ActiveDirectory/ActiveDirectoryNamingStandard.html
http://docs.oracle.com/javase/tutorial/jndi/ops/getattrs.html

Wednesday, January 4, 2012

Primefaces and encoding (UTF-8)

From pom.xml


<dependency>

 <groupId>org.primefaces</groupId>

 <artifactId>primefaces</artifactId>

 <version>3.0</version>

</dependency>

With Sun implementations special chars (šđčćž) are transformed to unreadable chars!!!


<dependency>

 <groupId>com.sun.faces</groupId>

 <artifactId>jsf-api</artifactId>

 <version>2.1.6</version>

</dependency>

<dependency>

 <groupId>com.sun.faces</groupId>

 <artifactId>jsf-impl</artifactId>

 <version>2.1.6</version>

</dependency>

It works well with Apache implementation:


<dependency>

 <groupId>org.apache.myfaces.core</groupId>

 <artifactId>myfaces-api</artifactId>

 <version>2.1.5</version>

</dependency>

<dependency>

 <groupId>org.apache.myfaces.core</groupId>

 <artifactId>myfaces-impl</artifactId>

 <version>2.1.5</version>

</dependency>

The index.xhtml page:


<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"

 xmlns:f="http://java.sun.com/jsf/core"

 xmlns:ui="http://java.sun.com/jsf/facelets"

 xmlns:h="http://java.sun.com/jsf/html"

 xmlns:p="http://primefaces.org/ui">

<f:view contentType="text/html">

 <h:head>

 </h:head>

 <h:body>

  <h:form>

   <h1>TESTING JSF and PRIMEFACES</h1>



   <h:panelGrid columns="3">

    <h:outputLabel for="lastName" value="Name: " />

    <h:inputText id="lastName" value="#{userInputBean.name}"/>

    <h:message for="lastName" styleClass="error" />

   </h:panelGrid>



   <br />

   <h:outputText value="#{userInputBean.name}" />



   <p:editor />

  </h:form>

 </h:body>

</f:view>

</html>