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POJson Jersey Deserialize : Abstract Class
 

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    <p>I'm trying to deserialize some JSON with Jersey/Jackson in Java.</p> <p>Here is an example of my JSON</p> <pre><code> { "text":"toto", "link":"titi", "items":[{ "text":"toutou", "link":"tata", "items":[{ "text":"toto2", "link":"toutou2", "data":"tonti", ]} ]} } </code></pre> <p>So what my Java model parts looks like this</p> <pre><code>public IItem { ... } public Item implements IItem { List&lt;IItem&gt; items; String text; String link; ... } public ItemData extends Item { String data; ... } </code></pre> <p>Now, when i try to deserialize my JSON, object mapper doesnt know what concrete class to Use. How do I tell him this ? The thing is that I want an Item (with a list of Item (with a list of ItemData)).</p> <p>I've though of only using one object containing all fields (text, link, data), but i'd prefer this type of design which appears better me. Do you think it's worth it ?</p> <p>In reality I have more than one field that would replicate because JSON structure is a bit more complex, I've simplified it for sake of clarity. </p> <p><strong>Question2</strong> : After that i need to serialise my objects again in JSON (first part is only for temporary development, I'll be filling objects from a JDBC driver later on), how can I tell jersey to only display one level at the time ?</p> <p>i.e i request <code>/</code> I want the first level only, answer should be :</p> <pre><code> { "text":"toto", "link":"titi", "items":[{ "text":"toutou", "link":"tata", ]} } </code></pre> <p>and if i request <code>/tata</code> answer should be :</p> <pre><code> { "text":"toutou", "link":"tata", "items":[{ "text":"toto2", "link":"toutou2", "data":"tonti" ]} } </code></pre> <p>(Question is more about how hiding the second level in my first request, I do understand how to handle the second request).</p> <p>Thanks,</p>
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    1. COTwo quick questions, what JSON library are you using, and are you allowed to change the JSON format?
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    2. COI think the library is Jackson. And I could change JSON format, but it seems to me that this is the best way to represent the data I'm sending. What did you have in mind ? Adding a flag for the object type ?
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    3. COYes, that's what I'm proposing, see answer below.
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