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    <p>Your issue results really weird for me... it seems that there must be some problem with Jersey's JSON serialization of single element arrays... if you Google "<em>Jersey JSON single element arrays</em>" you'll find the same issue, like <a href="http://tugdualgrall.blogspot.co.uk/2011/09/jax-rs-jersey-and-single-element-arrays.html" rel="nofollow noreferrer"><strong>here</strong></a> or <a href="https://stackoverflow.com/questions/13575280/jersey-json-array-with-1-element-is-serialized-as-object"><strong>here</strong></a>. I don't know too much about Jersey, so I can't help you with that...</p> <hr> <p>That said, I can suggest a workaround using manually parsing in Gson, to adapt your parsing to the 2 different responses (object or array). You could do something like this:</p> <pre><code>//manually parsing until get the "project" element... JsonParser parser = new JsonParser(); JsonObject rootObejct = parser.parse(yourJsonString).getAsJsonObject(); JsonElement projectElement = rootObejct.get("project"); Gson gson = new Gson(); List&lt;Project&gt; projectList = new ArrayList&lt;&gt;(); //Check if "project" element is an array or an object and parse accordingly... if (projectElement.isJsonObject()) { //The returned list has only 1 element Project project = gson.fromJson(projectElement, Project.class); projectList.add(project); } else if (projectElement.isJsonArray()) { //The returned list has &gt;1 elements Type projectListType = new TypeToken&lt;List&lt;Project&gt;&gt;() {}.getType(); projectList = gson.fromJson(projectElement, projectListType); } //Now you have a List&lt;Project&gt; projectList with one or many Project elements, //depending on the response... </code></pre> <p>Note that you don't need your class <code>ProjectContainer</code>.</p> <p>Something like this should work for you, although obviously the best thing would be fix the serialization issue!</p>
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    1. COThere's not a "problem" with Jersey or Gson ... the web service is basically broken and not returning consistently. His Java class has a `List<Project>` and that's what it has to be in the JSON (an array) if it's going to map properly. The web service is responding two different ways depending on the number of `Project` objects
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    2. CO@Brian, obviously the web service is not responding correctly, that's for sure, but if the mapping to JSON is made by Jersey automatically... I guess there is indeed some "problem" (or strange behaviour) in Jersey mapping... Otherwise, where is the error, if he doesn't have any serialization code?! where is the service broken?! The problem must be in Jersey's serialization...
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    3. COOh wait, I see what you mean - I misread that. I thought you meant on the Gson side. Unknown - it depends on what `getPagedProjects` is returning.
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