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POMapping between JSON formats in Java
 

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    <p>I'm coming to Java from JavaScript/Ruby. Let's say I've got the following JSON object for an animal:</p> <pre><code>{ name: { common: "Tiger", latin: "Panthera tigris" } legs: 4 } </code></pre> <p>I'm dealing with lots of animal APIs, and I want to normalize them all into my own common format, like:</p> <pre><code>{ common_name: "Tiger", latin_name: "Panthera tigris", limbs: { legs: 4, arms: 0 } } </code></pre> <p>In, say, JavaScript, this would be straightforward:</p> <pre><code>normalizeAnimal = function(original){ return { common_name: original.name.common, latin_name: original.name.latin, limbs: { legs: original.legs || 0, arms: original.arms || 0 } } } </code></pre> <p>But what about in Java? Using the JSONObject class from org.json, I could go down the road of doing something like this:</p> <pre><code>public JSONObject normalizeAnimal(JSONObject original) throws JSONException{ JSONObject name = original.getJSONObject("name"); JSONObject limbs = new JSONObject(); JSONObject normalized = new JSONObject(); normalized.put("name_name", name.get("common")); normalized.put("latin_name", name.get("latin")); try{ limbs.put("legs", original.get("legs"); }catch(e){ limbs.put("legs", 0); }; try{ limbs.put("arms", original.get("arms"); }catch(e){ limbs.put("arms", 0); }; normalized.put("limbs", limbs); return normalized; } </code></pre> <p>This gets worse as the JSON objects I'm dealing with get longer and deeper. In addition to all of this, I'm dealing with many providers for animal objects and I'll eventually be looking to have some succinct configuration format for describing the transformations (like, maybe, <code>"common_name": "name.common", "limbs.legs": "legs"</code>).</p> <p>How would I go about making this suck less in Java?</p>
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    1. CO(It *is* possible to run JavaScript in Java .. not that I particularly advise it for this task, but it is one [clever] approach ;-)
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    2. COWhat are you trying to achieve by this? As in, what actual problem that you have is solved by sending data in the same format? Because the JavaScript interpreter doesn't care.
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    3. CO@parsifal, I'm allowing a another developer to plug normalized animals into their UI without having to do the parsing in their UI code. (Also they're not really animals. It's a contrived example.)
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