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Externalization of check messages [message #526433]

Sat, 10 April 2010 20:20

Eclipse User

HI,

I wonder if there is a way to enable the externalization of messages shown when there is an error or a warning with check so i can change them easily after

Best regards
mahmoud

Re: Externalization of check messages [message #526452 is a reply to message #526433]

Sun, 11 April 2010 05:46

Eclipse User

hello mahmoud,

i don't know a direct way to do this but you can easy achive something similar by moving the message producing part of the check to a separate extension file.

metamodel/checks.chk

extension metamodel::messages;

context metamodel::Model ERROR msgABC() :
	false;

metamodel/messages.ext

String msgABC() : "There is an error";

or with some extra stuff you could even use java resource bundles

package metamodel;

import java.text.MessageFormat;
import java.util.List;
import java.util.ResourceBundle;

public class I18NHelper {
	
	public static String msg(String key, List<Object> args) {
		return MessageFormat.format(ResourceBundle.getBundle("messages").getString(key), args.toArray());
	}

}

messages.properties

ABC=Böser Fehler

String msg(String key, List args) :
	JAVA metamodel.I18NHelper.msg(java.lang.String, java.util.List);

context metamodel::Model ERROR msg("ABC",{}) :
	false;

may not be perfect but working

Re: Externalization of check messages [message #526499 is a reply to message #526452]

Sun, 11 April 2010 18:51

Eclipse User

Hi Christian,

Thanks for the reply, but i was looking exactly for your second answer, can i have more details about java resource bundles, i dont have any idea how to perform this,

thanks
mahmoud

Re: Externalization of check messages [message #526516 is a reply to message #526499]

Mon, 12 April 2010 02:21

Eclipse User

ResourceBundle is a std java lib class so have a look at the javadoc for this

[Updated on: Mon, 12 April 2010 02:22] by Moderator

Re: Externalization of check messages [message #529684 is a reply to message #526516]

Mon, 26 April 2010 14:26

Eclipse User

hi Christian,

i tried to perform the example but i couldnt make it woks.
I create the bundle but i dint understand how to make it work with I18NHelper

Quote:

package com.validation;

import org.eclipse.osgi.util.NLS;

public class Messages extends NLS {
private static final String BUNDLE_NAME = "com.netfective.validation.messages"; //$NON-NLS-1$
public static String ddd_0;

static {
// initialize resource bundle
NLS.initializeMessages(BUNDLE_NAME, Messages.class);
}

private Messages() {
}
}

in my extension file this this :

Quote:

String msg(String key, List args) :
JAVA com.validation.I18NHelper.msg(java.lang.String, java.util.List);

end last in my check file i have :

Quote:

context DSLMetaModel::Attribute ERROR msg("ddd_0",{}) :
this.type.name!= null;

i know that its my fault because i forget something

mahmoud

Re: Externalization of check messages [message #529812 is a reply to message #529684]

Tue, 27 April 2010 06:55

Eclipse User

Hi, you mix Java Resource bundles (I18NHelper) with Eclipse NLS (Your Messages class that is nowhere used). That is the problem.
Just have a look at the ResourceBundle JavaDoc for how to configure it (a file messages[_locale].properties in classpath since the code says ResourceBundle.getBundle("messages"))

[Updated on: Tue, 27 April 2010 06:58] by Moderator

Re: Externalization of check messages [message #530635 is a reply to message #529812]

Fri, 30 April 2010 07:53

Eclipse User

Hello christian,

i would like to share my example that works pretty fine, thanks to you:

Quote:

package com.sms;

import java.util.MissingResourceException;
import java.util.ResourceBundle;

public class Messages {
private static final String BUNDLE_NAME = "com.sms.messages";

private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle
.getBundle(BUNDLE_NAME);

private Messages() {
}

public static String getString(String key) {
try {
return RESOURCE_BUNDLE.getString(key);
} catch (MissingResourceException e) {
return '!' + key + '!';
}
}
}

the messages.proprties:

Quote:

test.1=element must have a name

the extension file :

Quote:

String msg (String s):
JAVA com.sms.Messages.getString(java.lang.String)
;

and the check file :

Quote:

context MetaModel::Cars ERROR msg('test.1')
this.name!=null
;

mahmoud

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