[digester] Parsing Attributes of a Topic Map

[Jason Vinson <vi...@charter.net>]

(Sorry if this is sent twice... I sent from an unsubscribed address before).

We have a consultant who is lobbying for a Topic Map format for a 
business solution.  The following is a simplified example:

<myCheck>
 <entity>
   <items type="EntityName">
     <item name="FirstName" value="Joe"/>
     <item name="MiddleName" value=""/>
     <item name="LastName" value="Blow"/>
   </items>
   <item name="PhoneNumber" value="123-456-7890"/>
 </entity>
 <entity>
 .
 (any number of entities here)
 .
 </entity>
</myCheck>

I want to digest this into an object with the following format:

public class Entity {
setFirstName(String fName);
setMiddleName(String mName);
setLastName(String lName);
setPhoneNumber(String phoneNo);
}

So I struggled a bit and came up with this:

Digester digester = new Digester();

digester.addObjectCreate("myCheck", ArrayList.class);

digester.addObjectCreate("myCheck/entity", clazz);
digester.addRule("myCheck/entity/item", new addAttributeSetter());
digester.addRule("myCheck/entity/items/item", new addAttributeSetter());

// Add all "entities"
digester.addSetNext("myCheck/entity", "add");

theList = (List) digester.parse(new StringReader(xml));

with an inner class "addAttributeSetter" with the following:

public void begin(String namespace, String name, Attributes attribs) {
   try {
       String theVal = attribs.getValue("value");
       String theName = StringUtils.uncapitalize(attribs.getValue("name"));
       Object obj = digester.peek();
       BeanUtils.setProperty(obj, theName, theVal);
   } catch (Exception e) {
       log.error(e);
   }
}

My question is this - There must be an easier way to do this  :)

It was way too easy to create this custom rule, which makes me wonder if 
there is something similar already in place that I haven't found.

Any comments or pointers are welcomed,
Jason
 
 

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Re: [digester] Parsing Attributes of a Topic Map

[Jason Vinson <vi...@charter.net>]

I should mention that the addAttributeSetter inner class extends Rule 
(which you probably figured out).

Also the reference to clazz should be a Entity.class.


Jason Vinson wrote:

> (Sorry if this is sent twice... I sent from an unsubscribed address 
> before).
>
> We have a consultant who is lobbying for a Topic Map format for a 
> business solution.  The following is a simplified example:
>
> <myCheck>
> <entity>
>   <items type="EntityName">
>     <item name="FirstName" value="Joe"/>
>     <item name="MiddleName" value=""/>
>     <item name="LastName" value="Blow"/>
>   </items>
>   <item name="PhoneNumber" value="123-456-7890"/>
> </entity>
> <entity>
> .
> (any number of entities here)
> .
> </entity>
> </myCheck>
>
> I want to digest this into an object with the following format:
>
> public class Entity {
> setFirstName(String fName);
> setMiddleName(String mName);
> setLastName(String lName);
> setPhoneNumber(String phoneNo);
> }
>
> So I struggled a bit and came up with this:
>
> Digester digester = new Digester();
>
> digester.addObjectCreate("myCheck", ArrayList.class);
>
> digester.addObjectCreate("myCheck/entity", clazz);
> digester.addRule("myCheck/entity/item", new addAttributeSetter());
> digester.addRule("myCheck/entity/items/item", new addAttributeSetter());
>
> // Add all "entities"
> digester.addSetNext("myCheck/entity", "add");
>
> theList = (List) digester.parse(new StringReader(xml));
>
> with an inner class "addAttributeSetter" with the following:
>
> public void begin(String namespace, String name, Attributes attribs) {
>   try {
>       String theVal = attribs.getValue("value");
>       String theName = 
> StringUtils.uncapitalize(attribs.getValue("name"));
>       Object obj = digester.peek();
>       BeanUtils.setProperty(obj, theName, theVal);
>   } catch (Exception e) {
>       log.error(e);
>   }
> }
>
> My question is this - There must be an easier way to do this  :)
>
> It was way too easy to create this custom rule, which makes me wonder 
> if there is something similar already in place that I haven't found.
>
> Any comments or pointers are welcomed,
> Jason
>
>
>
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> To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: commons-user-help@jakarta.apache.org
>
>


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