title: parsing json with high level "unknown" names
body: <p>How do you parse a JSON structure such as this</p>
  
  <pre><code>  "properties": {
      "/base/pinball/pinball_machine_basis/pinball_machines": {
        "expected_type": {
          "id": "/base/pinball/pinball_machine",
          "text": "Pinball Machine"
        },
        "text": "Pinball Machines",
        "values": [
          {
            "id": "/m/026z8cp",
            "text": "The Lord of the Rings",
            "url": "http://www.freebase.com/view/m/026z8cp"
          }
        ]
      },
      "/common/topic/article": {
        "expected_type": {
          "id": "/common/document",
          "text": "Document"
        },
        "text": "article",
        "values": [
          {
            "id": "/m/025h5z",
            "text": "",
            "url": "http://www.freebase.com/view/m/025h5z"
          }
        ]
      },
      "/common/topic/image": {
        "expected_type": {
          "id": "/common/image",
          "text": "Image"
        },
        "text": "image",
        "values": [
          {
            "id": "/m/029wvk4",
            "text": "The Lord of the Rings: The Motion Picture Trilogy poster (2003)",
            "url": "http://www.freebase.com/view/m/029wvk4"
          },
          {
            "id": "/m/0bdyf3j",
            "text": "",
            "url": "http://www.freebase.com/view/m/0bdyf3j"
          },
          {
            "id": "/m/0glyg_4",
            "text": "lotr-extended-blu-ray.jpg",
            "url": "http://www.freebase.com/view/m/0glyg_4"
          }
        ]
      },
  </code></pre>
  
  <p>I will not know in advance the high level names such as "/base/pinball/pinball_machine_basis/pinball_machines", "/common/topic/article", or "/exhibitions/exhibition_subject/exhibitions_created_about_this_subject"</p>
  
  <p>i have tried Jackson but cannot see how to generate a java class that matches this structure. it apears to be an array but isnt surrounded with "[" or "]".</p>
  
  <p>the structure repeats "expected_type", "text", "values" etc. what am i missing?</p>