RE: Message bundle problem

[Matt.Rossner-prest]

This looks interesting. I've been to implement a similar approach using a dummy 
Map that builds the key. Although I think your solution looks even nicer than 
what I came up with. I'll have to give it try.

 

Thanks

 

________________________________

From: Michael Heinen [mailto:michael.hei...@recommind.com] 
Sent: vendredi 6 mars 2009 11:54
To: MyFaces Discussion
Subject: RE: Message bundle problem

 

You can use a Lazy map as Wrapper to build the keys dynamically.

 

A Transformer will be called during map access and you can add your prefix to 
your key.

This does also work inside tables, lists etc

 

Sample:

import java.io.Serializable;

import java.util.HashMap;

import java.util.Map;

import org.apache.commons.collections.Transformer;

import org.apache.commons.collections.map.LazyMap;

 

public class MessageKeyCreatorBean implements Serializable

{

  private Map mLazyMap;

  public MessageKeyCreatorBean(){}

 

  public void setTransformer (Object input)

  {

    String inputString = (String) input; 

    Transformer keyTransformer = new KeyTransformer(inputString);

    this.mLazyMap = LazyMap.decorate(new HashMap(), keyTransformer);

  }

 

  public Map getLazyKey()

  {

    return this.mLazyMap;

  }

  

  public Object get(Object key)

  {

    return this.mLazyMap.get(key);

  } 

  

  private static class KeyTransformer implements Transformer, Serializable

  {

    private String mPrefix = null;

 

    public KeyTransformer(String prefix )

    {

      this.mPrefix = prefix;

    }

    public Object transform(Object input)

    {

      return this.mPrefix+input.toString();

    }

  }

}

Config:

  <managed-bean>

    <managed-bean-name>myPrefixBean</managed-bean-name>

    <managed-bean-class>....MessageKeyCreatorBean</managed-bean-class>

    <managed-bean-scope>application</managed-bean-scope>

    <managed-property>

      <property-name>transformer</property-name>

      <value>linked</value>

    </managed-property>

  </managed-bean>

 

View:

myPrefixBean.lazyKey[bean.type]

 

Michael

 

From: matt.rossner-pr...@sanofi-aventis.com 
[mailto:matt.rossner-pr...@sanofi-aventis.com] 
Sent: Freitag, 6. März 2009 11:31
To: users@myfaces.apache.org
Subject: Message bundle problem

 

Hi,

 

I need to access a message bundle property like so:

 

<t:outputText value="#{msg['linked.' + bean.type]}" />

 

Although that syntax doesn't quite work. I've tried a few things. The closest I 
got was using a t:aliasBean like

 

<t:aliasBean alias="#{key}" value="linked.#{bean.type}" />

 

<t:outputText value="#{msg[key]}" />

 

This actually works, but problems arise when you stick that into a t:dataList. 
Inside the datalist the t:aliasBean doesn't get reevaluated and instead the 
property resolver will try and resolve "#{msg[linked.#{bean.type}]} which 
doesn't work.

 

I had a temporary fix which changed the value stored in the bean to include the 
"linked." part but that causes problems later with the application logic. 

 

Thanks for any help

Matt