Retrieve a list of classes in the metamodel

This article shows how to use the API to get a list of the available classes contained in the metamodel .

The snippet below sends a request to the endpoint /rest/<VERSION>/metamodel/classes and receives as a response a JSON structure containing the list of available classes, each with ID and language-inspecific name.

note

The snippet below uses Basic Authentication.

Replace the values in angle brackets with values that fit your setup, e.g. instead of <HOST> use the host at which you access your ADOXX instance.

Click to view the code!

Source Code

public class GetMetamodelClasses
{
  public static void main (final String [] args) throws ClientProtocolException, IOException
  {
    final CloseableHttpClient aClient = HttpClients.createDefault ();
    
    final String sUser = "<USER>";
    final String sPass = "<PASSWORD>";
    final String sPath = "http://<HOST>:<PORT>/ADOXX/rest/2.0/metamodel/classes";
    
    final HttpGet aMethod = new HttpGet (sPath);
    
    // The headers controlling the return type and the language do not have to be considered for
    // token generation
    aMethod.addHeader ("Accept", "application/json");
    aMethod.addHeader ("Accept-Language", "en");
    
    // Construction of the header to pass the basic authentication information
    aMethod.addHeader ("Authorization",
                       "Basic " +
                           DatatypeConverter.printBase64Binary ((sUser + ":" + sPass).getBytes ()));
    
    final CloseableHttpResponse aResponse = aClient.execute (aMethod);
    
    try
    {
      final String sResult = EntityUtils.toString (aResponse.getEntity (), "UTF-8");
      final StatusLine aStatusLine = aResponse.getStatusLine ();
      System.out.println ("Status Code: " + aStatusLine.getStatusCode ());
      System.out.println ("Result: \n" + sResult);
    }
    catch (final Exception aEx)
    {
      aEx.printStackTrace ();
    }
    finally
    {
      aResponse.close ();
    }
  }
}

The result should look similar to the following:

Status Code: 200
Result: 
{
  "rest_links": [ ... ],
  "classes": [ ...]
}