Re: [Simple-support] Composite attributes

[Sebastian H. <us...@la...>]

Hi,

I checked the use of a converter. I wonder if it is the right solution here.

Imagine a pair of attributes: from and to
Those are expressed as attributeGroup and used in many elements.

I would need to provide a converter for every element.



I had a look at the code base. I like the code quality and structure a lot but it is quite a lot of code.

I struggled to add a new Label which creates new instances, parses nested fields and add the attribute to the attribute map. I give up here. I don’t thing I can provide a quality patch.

The idea I wanted to achieve was: Composition for attributes.

Given multiple attributes used in various places in an XML, for example a time range (from, to). In XSD this can be expressed as an attributeGroup. 
Many elements can contain this attributeGroup.

I would like this attributes to be added to a Composite class containing the attributes instead of mapping it to fields in the class.

Wherever you use those attributes, you add an annotation and 

@AttributeGroup
Range range;



-- 
Best Regards / Viele Grüße

Sebastian Hennebrueder

-----
http://www.laliluna.de <http://www.laliluna.de/>
Software developer and Coach for Java, JEE, Clojure and Java Persistence

> Am 16.02.2016 um 16:15 schrieb Sebastian Hennebrueder <us...@la...>:
> 
> Hi,
> 
> this works technically but creates a lot of verbosity. The intent is to use a composite containing attributes used in a lot of classes.
> 
> What do you think about a new annotation
> 
> @AttributeGroup
> To mark a class containing additional attributes.
> 
> I have no idea about the effort, but if I provide a patch, would you accept it?
> 
> -- 
> Best Regards / Viele Grüße
> 
> Sebastian Hennebrueder
> 
> -----
> http://www.laliluna.de <http://www.laliluna.de/>
> Software developer and Coach for Java, JEE, Clojure and Java Persistence
> 
>> Am 16.02.2016 um 15:03 schrieb Niall Gallagher <gal...@ya... <mailto:gal...@ya...>>:
>> 
>> You can write a Converter class, or alternatively you could use an @Resolve to create a object like so
>> 
>> public class X{
>>     @Attribute int a;
>>     @Attribute int b;
>>     @Attribute int c;
>>     @Resolve
>>     public Y get() {
>>         return new Y(a,b,c);
>>     }
>> }
>> public class Y {
>>     Z z;
>>     int a;
>>     Y(a, b, c){
>>         this.z = new Z(b,c);
>>         this.a = a;
>>     }
>> }
>> public class Z{
>>     int b;
>>     int c;
>>     Z(a,b){
>>     }
>> }
>> 
>> 
>> From: Sebastian Hennebrueder <us...@la... <mailto:us...@la...>>
>> To: sim...@li... <mailto:sim...@li...> 
>> Sent: Tuesday, 16 February 2016, 13:10
>> Subject: [Simple-support] Composite attributes
>> 
>> Hi,
>> 
>> I have a mapping question for a given XSD. Given a attributeGroup bar, used in many definitions.
>> 
>> <xs:complexType name=„myElement">
>>   <xs:complexContent>
>>     <xs:extension base="ns1:someMoreAttributes">
>>       <xs:attributeGroup ref="ns1:foo" />
>>     </xs:extension>
>>   </xs:complexContent>
>> </xs:complexType>
>> 
>> <xs:attributeGroup name=„foo">
>>   <xs:attribute name="name" type="xs:string" />
>>   <xs:attributeGroup ref="ns1:bar" />
>> </xs:attributeGroup>
>> 
>> <xs:attributeGroup name="bar">
>>   <xs:attribute name=„field1" type="xs:string“/>
>>   <xs:attribute name=„field2" type="xs:string“/>
>> </xs:attributeGroup>
>> 
>> xml:
>> <myElement id="abc“ name="aName“ field1="abc“ field2="def“/>
>> 
>> I would like to have a class 
>> class MyElement
>> 	String id;
>> 	String name;
>> 	Bar bar;
>> }
>> 
>> class Bar{
>> 	String field1;
>> 	String field2;
>> }
>> 
>> Is there a way to write attributes to a nested class Bar instead of MyElement?
>> 
>> -- 
>> Best Regards / Viele Grüße
>> 
>> Sebastian Hennebrueder
>> 
>> -----
>> http://www.laliluna.de <http://www.laliluna.de/>
>> Software developer and Coach for Java, JEE, Clojure and Java Persistence
>> 
>> 
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> 
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