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Beginner : need xtend help [message #697890]

Mon, 18 July 2011 09:40

Arun

Messages: 26
Registered: July 2011

Junior Member

Hi,

I have a model which generates html tags like the below one

<form name="test" method=POST action="test.jps">
<input type=text name="name" length=30/>
</form>

The 'length' attribute is not a mandatory one. I have to add the length attribute only if it has been defined in dsl.

In xpand i have,

«FOREACH forms AS f»
<form name="«f.name»" "method="«f.methodType.name.toUpperCase()»" action="">
«FOREACH f.texts AS t»

<input type="text" name="«t.name»" maxlength="«t.maxlength»"/>
«ENDFOREACH»
</form>
«ENDFOREACH»

I have to add 'maxlength' attribute conditionally in my xpand template.

In Extensions.ext file , i have

boolean isMaxLengthExists(Model this) :
this.types.typeSelect(HTML).forms.texts.exists(e|e.maxlength) ;

//I'm getting error Boolean type expected! was Integer.

FYI, maxlength i s of type INT.

Thanks,
Arun

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Re: Beginner : need xtend help [message #697891 is a reply to message #697890]

Mon, 18 July 2011 09:42

Arun

Messages: 26
Registered: July 2011

Junior Member

Sorry there is a typo its not maxlength, it is 'length'

boolean isLengthExists(Model this) :
this.types.typeSelect(HTML).forms.texts.exists(e|e.length) ;

length is of type INT

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Re: Beginner : need xtend help [message #697893 is a reply to message #697891]

Mon, 18 July 2011 09:48

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

this.types.typeSelect(HTML).forms.texts.exists(e|e.length!=0);

The problem is that there is a default value for features with integer value, so by default you cannot distinguish the case "length is not set" and "length is set to 0".

Alex

Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext@itemis.de

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Re: Beginner : need xtend help [message #697894 is a reply to message #697893]

Mon, 18 July 2011 09:51

Arun

Messages: 26
Registered: July 2011

Junior Member

Thanks for the quick reply Alex!. But how to call this xpand template and conditionally generate the html tags.

Thanks,
Arun

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Re: Beginner : need xtend help [message #697898 is a reply to message #697894]

Mon, 18 July 2011 09:58

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

<input type="text" name="«t.name»"«IF conditionIsTrueFor(t)» length="«t.length»"«ENDIF»/>

Please have a look at the Xtend/Xpand documentation for these basic concepts.

Alex

Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext@itemis.de

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