JAL-1270 more fix for failing Functional test
[jalview.git] / src / jalview / ws / dbsources / PDBRestClient.java
index c26c88f..dbdb01d 100644 (file)
@@ -1,11 +1,35 @@
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
 package jalview.ws.dbsources;
 
-import jalview.ws.uimodel.PDBSearchResultPojo;
-import jalview.ws.uimodel.PDBSummaryListModel;
+import jalview.util.MessageManager;
+import jalview.ws.uimodel.PDBRestRequest;
+import jalview.ws.uimodel.PDBRestResponse;
+import jalview.ws.uimodel.PDBRestResponse.PDBResponseSummary;
 
+import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Iterator;
+import java.util.List;
 
-import javax.swing.DefaultListModel;
 import javax.ws.rs.core.MediaType;
 
 import org.json.simple.JSONArray;
@@ -18,51 +42,233 @@ import com.sun.jersey.api.client.ClientResponse;
 import com.sun.jersey.api.client.WebResource;
 import com.sun.jersey.api.client.config.ClientConfig;
 import com.sun.jersey.api.client.config.DefaultClientConfig;
-import com.sun.jersey.api.json.JSONConfiguration;
 
+/**
+ * A rest client for querying the Search endpoing of the PDB REST API
+ * 
+ * @author tcnofoegbu
+ *
+ */
 public class PDBRestClient
 {
-  private String pdbSearchEndpoint = "http://wwwdev.ebi.ac.uk/pdbe/search/pdb/select?";
+  public static final String PDB_SEARCH_ENDPOINT = "http://www.ebi.ac.uk/pdbe/search/pdb/select?";
 
+  private static int DEFAULT_RESPONSE_SIZE = 200;
 
-  public static void main(String[] args)
+  /**
+   * Takes a PDBRestRequest object and returns a response upon execution
+   * 
+   * @param pdbRestRequest
+   *          the PDBRestRequest instance to be processed
+   * @return the pdbResponse object for the given request
+   * @throws Exception
+   */
+  public PDBRestResponse executeRequest(PDBRestRequest pdbRestRequest)
+          throws Exception
   {
-    new PDBRestClient().searchResult("pfam_name", "Lipoc*");
+    try
+    {
+      ClientConfig clientConfig = new DefaultClientConfig();
+      Client client = Client.create(clientConfig);
+
+      String wantedFields = getPDBDocFieldsAsCommaDelimitedString(pdbRestRequest
+              .getWantedFields());
+      int responseSize = (pdbRestRequest.getResponseSize() == 0) ? DEFAULT_RESPONSE_SIZE
+              : pdbRestRequest.getResponseSize();
+      String sortParam = null;
+      if (pdbRestRequest.getFieldToSortBy() == null
+              || pdbRestRequest.getFieldToSortBy().trim().isEmpty())
+      {
+        sortParam = "";
+      }
+      else
+      {
+        if (pdbRestRequest.getFieldToSortBy()
+                .equalsIgnoreCase("Resolution"))
+        {
+          sortParam = pdbRestRequest.getFieldToSortBy()
+                  + (pdbRestRequest.isAscending() ? " asc" : " desc");
+        }
+        else
+        {
+          sortParam = pdbRestRequest.getFieldToSortBy()
+                  + (pdbRestRequest.isAscending() ? " desc" : " asc");
+        }
+      }
+
+      String facetPivot = (pdbRestRequest.getFacetPivot() == null || pdbRestRequest
+              .getFacetPivot().isEmpty()) ? "" : pdbRestRequest
+              .getFacetPivot();
+      String facetPivotMinCount = String.valueOf(pdbRestRequest
+              .getFacetPivotMinCount());
+      
+      // Build request parameters for the REST Request
+      WebResource webResource = null;
+      if (pdbRestRequest.isFacet())
+      {
+        webResource = client.resource(PDB_SEARCH_ENDPOINT)
+                .queryParam("wt", "json").queryParam("fl", wantedFields)
+                .queryParam("rows", String.valueOf(responseSize))
+                .queryParam("q", pdbRestRequest.getQuery())
+                .queryParam("sort", sortParam).queryParam("facet", "true")
+                .queryParam("facet.pivot", facetPivot)
+                .queryParam("facet.pivot.mincount", facetPivotMinCount);
+      }
+      else
+      {
+        webResource = client.resource(PDB_SEARCH_ENDPOINT)
+                .queryParam("wt", "json").queryParam("fl", wantedFields)
+                .queryParam("rows", String.valueOf(responseSize))
+                .queryParam("q", pdbRestRequest.getQuery())
+                .queryParam("sort", sortParam);
+      }
+      // Execute the REST request
+      ClientResponse clientResponse = webResource.accept(
+              MediaType.APPLICATION_JSON).get(ClientResponse.class);
+
+      // Get the JSON string from the response object
+      String responseString = clientResponse.getEntity(String.class);
+      // System.out.println("query >>>>>>> " + pdbRestRequest.toString());
+
+      // Check the response status and report exception if one occurs
+      if (clientResponse.getStatus() != 200)
+      {
+        String errorMessage = "";
+        if (clientResponse.getStatus() == 400)
+        {
+          errorMessage = parseJsonExceptionString(responseString);
+          throw new Exception(errorMessage);
+        }
+        else
+        {
+          errorMessage = getMessageByHTTPStatusCode(clientResponse
+                  .getStatus());
+          throw new Exception(errorMessage);
+        }
+      }
+
+      // Make redundant objects eligible for garbage collection to conserve
+      // memory
+      clientResponse = null;
+      client = null;
+
+      // Process the response and return the result to the caller.
+      return parsePDBJsonResponse(responseString, pdbRestRequest);
+    } catch (Exception e)
+    {
+      String exceptionMsg = e.getMessage();
+      if (exceptionMsg.contains("SocketException"))
+      {
+        // No internet connection
+        throw new Exception(
+                MessageManager
+                        .getString("exception.unable_to_detect_internet_connection"));
+      }
+      else if (exceptionMsg.contains("UnknownHostException"))
+      {
+        // The server 'www.ebi.ac.uk' is unreachable
+        throw new Exception(
+                MessageManager
+                        .getString("exception.pdb_server_unreachable"));
+      }
+      else
+      {
+        throw e;
+      }
+    }
   }
 
-  private String executeRestSearch(String qParam,
-          String searchTerm)
+  public String getMessageByHTTPStatusCode(int code)
   {
-    ClientConfig clientConfig = new DefaultClientConfig();
-    clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING,
-            Boolean.TRUE);
-    Client client = Client.create(clientConfig);
-    WebResource webResource = client.resource(pdbSearchEndpoint)
-            .queryParam("wt", "json")
-            .queryParam("q", qParam + ":" + searchTerm);
-    ClientResponse clientResponse = webResource.accept(
-            MediaType.APPLICATION_JSON).get(ClientResponse.class);
-
-    String responseString = clientResponse.getEntity(String.class);
-    if (clientResponse.getStatus() != 200)
-    {
-      throw new RuntimeException("Failed : HTTP error code : "
-              + clientResponse.getStatus());
+    String message = "";
+    switch (code)
+    {
+    case 410:
+      message = MessageManager
+              .getString("exception.pdb_rest_service_no_longer_available");
+      break;
+    case 403:
+    case 404:
+      message = MessageManager.getString("exception.resource_not_be_found");
+      break;
+    case 408:
+    case 409:
+    case 500:
+    case 501:
+    case 502:
+    case 503:
+    case 504:
+    case 505:
+      message = MessageManager.getString("exception.pdb_server_error");
+      break;
+
+    default:
+      break;
     }
-    return responseString;
+    return message;
   }
 
-  public PDBSearchResultPojo searchResult(String qParam,
-          String searchTerm)
+  /**
+   * Process error response from PDB server if/when one occurs.
+   * 
+   * @param jsonResponse
+   *          the JSON string containing error message from the server
+   * @return the processed error message from the JSON string
+   */
+  public static String parseJsonExceptionString(String jsonErrorResponse)
   {
-    String jsonResponseString = executeRestSearch(qParam, searchTerm);
-    PDBSearchResultPojo searchResult = new PDBSearchResultPojo();
-    DefaultListModel<PDBSummaryListModel> result = null;
+    StringBuilder errorMessage = new StringBuilder(
+            "\n============= PDB Rest Client RunTime error =============\n");
+
+    try
+    {
+      JSONParser jsonParser = new JSONParser();
+      JSONObject jsonObj = (JSONObject) jsonParser.parse(jsonErrorResponse);
+      JSONObject errorResponse = (JSONObject) jsonObj.get("error");
+
+      JSONObject responseHeader = (JSONObject) jsonObj
+              .get("responseHeader");
+      JSONObject paramsObj = (JSONObject) responseHeader.get("params");
+      String status = responseHeader.get("status").toString();
+      String message = errorResponse.get("msg").toString();
+      String query = paramsObj.get("q").toString();
+      String fl = paramsObj.get("fl").toString();
+
+      errorMessage.append("Status: ").append(status).append("\n");
+      errorMessage.append("Message: ").append(message).append("\n");
+      errorMessage.append("query: ").append(query).append("\n");
+      errorMessage.append("fl: ").append(fl).append("\n");
+
+    } catch (ParseException e)
+    {
+      e.printStackTrace();
+    }
+    return errorMessage.toString();
+  }
+
+  /**
+   * Parses the JSON response string from PDB REST API. The response is dynamic
+   * hence, only fields specifically requested for in the 'wantedFields'
+   * parameter is fetched/processed
+   * 
+   * @param pdbJsonResponseString
+   *          the JSON string to be parsed
+   * @param pdbRestRequest
+   *          the request object which contains parameters used to process the
+   *          JSON string
+   * @return
+   */
+  @SuppressWarnings("unchecked")
+  public static PDBRestResponse parsePDBJsonResponse(
+          String pdbJsonResponseString, PDBRestRequest pdbRestRequest)
+  {
+    PDBRestResponse searchResult = new PDBRestResponse();
+    List<PDBResponseSummary> result = null;
     try
     {
       JSONParser jsonParser = new JSONParser();
       JSONObject jsonObj = (JSONObject) jsonParser
-              .parse(jsonResponseString);
+              .parse(pdbJsonResponseString);
 
       JSONObject pdbResponse = (JSONObject) jsonObj.get("response");
       String queryTime = ((JSONObject) jsonObj.get("responseHeader")).get(
@@ -71,18 +277,16 @@ public class PDBRestClient
               .valueOf(pdbResponse.get("numFound").toString());
       if (numFound > 0)
       {
-        result = new DefaultListModel<PDBSummaryListModel>();
+        result = new ArrayList<PDBResponseSummary>();
         JSONArray docs = (JSONArray) pdbResponse.get("docs");
         for (Iterator<JSONObject> docIter = docs.iterator(); docIter
                 .hasNext();)
         {
           JSONObject doc = docIter.next();
-          if (doc.get("molecule_sequence") != null)
-          {
-            result.addElement(new PDBSummaryListModel(doc));
-          }
+          result.add(searchResult.new PDBResponseSummary(doc,
+                  pdbRestRequest));
         }
-        searchResult.setItemFound(numFound);
+        searchResult.setNumberOfItemsFound(numFound);
         searchResult.setResponseTime(queryTime);
         searchResult.setSearchSummary(result);
       }
@@ -90,8 +294,270 @@ public class PDBRestClient
     {
       e.printStackTrace();
     }
-
     return searchResult;
   }
 
+  /**
+   * Takes a collection of PDBDocField and converts its 'code' Field values into
+   * a comma delimited string.
+   * 
+   * @param pdbDocfields
+   *          the collection of PDBDocField to process
+   * @return the comma delimited string from the pdbDocFields collection
+   */
+  public static String getPDBDocFieldsAsCommaDelimitedString(
+          Collection<PDBDocField> pdbDocfields)
+  {
+    String result = "";
+    if (pdbDocfields != null && !pdbDocfields.isEmpty())
+    {
+      StringBuilder returnedFields = new StringBuilder();
+      for (PDBDocField field : pdbDocfields)
+      {
+        returnedFields.append(",").append(field.getCode());
+      }
+      returnedFields.deleteCharAt(0);
+      result = returnedFields.toString();
+    }
+    return result;
+  }
+
+  /**
+   * Determines the column index for 'PDB Id' Fields in the dynamic summary
+   * table. The PDB Id serves as a unique identifier for a given row in the
+   * summary table
+   * 
+   * @param wantedFields
+   *          the available table columns in no particular order
+   * @return the pdb id field column index
+   */
+  public static int getPDBIdColumIndex(
+          Collection<PDBDocField> wantedFields, boolean hasRefSeq)
+  {
+
+    // If a reference sequence is attached then start counting from 1 else
+    // start from zero
+    int pdbFieldIndexCounter = hasRefSeq ? 1 : 0;
+
+    for (PDBDocField field : wantedFields)
+    {
+      if (field.equals(PDBDocField.PDB_ID))
+      {
+        break; // Once PDB Id index is determined exit iteration
+      }
+      ++pdbFieldIndexCounter;
+    }
+    return pdbFieldIndexCounter;
+  }
+
+  public static PDBDocField getPDBDocFieldByCode(String fieldCode)
+          throws Exception
+  {
+    for (PDBDocField curPDBDocField : PDBDocField.values())
+    {
+      if (curPDBDocField.getCode().equalsIgnoreCase(fieldCode))
+      {
+        return curPDBDocField;
+      }
+    }
+    throw new Exception("PDB doc Field not found!");
+  }
+
+  /**
+   * This enum represents the fields available in the PDB JSON response
+   *
+   */
+  public enum PDBDocField
+  {
+    PDB_ID("PDB Id", "pdb_id", Group.CROSS_REFS), TITLE(
+            "Title",
+ "title", Group.MISCELLENOUS),
+    MOLECULE_NAME("Molecule",
+            "molecule_name",
+            Group.NAMES_AND_TAXONOMY), MOLECULE_TYPE(
+            "Molecule Type", "molecule_type", Group.NAMES_AND_TAXONOMY), MOLECULE_SEQUENCE(
+            "Sequence", "molecule_sequence", Group.MISCELLENOUS), PFAM_ACCESSION(
+            "PFAM Accession", "pfam_accession",
+            Group.CROSS_REFS), PFAM_NAME(
+            "PFAM Name", "pfam_name", Group.NAMES_AND_TAXONOMY), INTERPRO_NAME(
+            "InterPro Name", "interpro_name", Group.NAMES_AND_TAXONOMY), INTERPRO_ACCESSION(
+            "InterPro Accession", "interpro_accession",
+            Group.CROSS_REFS), UNIPROT_ID("UniProt Id",
+            "uniprot_id", Group.CROSS_REFS), UNIPROT_ACCESSION(
+            "UniProt Accession", "uniprot_accession",
+            Group.CROSS_REFS),
+
+    UNIPROT_COVERAGE(
+            "UniProt Coverage", "uniprot_coverage", Group.MISCELLENOUS), UNIPROT_FEATURES(
+            "Uniprot Features", "uniprot_features", Group.MISCELLENOUS), R_FACTOR(
+"R Factor",
+            "r_factor", Group.QUALITY_MEASURES), RESOLUTION("Resolution",
+            "resolution", Group.QUALITY_MEASURES), DATA_QUALITY(
+            "Data Quality", "data_quality", Group.QUALITY_MEASURES), OVERALL_QUALITY(
+            "Overall Quality", "overall_quality", Group.QUALITY_MEASURES), POLYMER_COUNT(
+            "Number of Polymers", "number_of_polymers", Group.MISCELLENOUS), PROTEIN_CHAIN_COUNT(
+            "Number of Protein Chains", "number_of_protein_chains",
+            Group.MISCELLENOUS), BOUND_MOLECULE_COUNT(
+            "Number of Bound Molecule", "number_of_bound_molecules",
+            Group.MISCELLENOUS), POLYMER_RESIDUE_COUNT(
+            "Number of Polymer Residue", "number_of_polymer_residues",
+            Group.MISCELLENOUS), GENUS("GENUS", "genus",
+            Group.NAMES_AND_TAXONOMY), GENE_NAME("Gene Name", "gene_name",
+            Group.NAMES_AND_TAXONOMY), EXPERIMENTAL_METHOD(
+            "Experimental Method", "experimental_method",
+            Group.PROCEDURE_AND_SOFTWARE), GO_ID("GO Id", "go_id",
+            Group.CROSS_REFS), ASSEMBLY_ID("Assembly Id",
+            "assembly_id", Group.CROSS_REFS), ASSEMBLY_FORM(
+            "Assembly Form", "assembly_form", Group.MISCELLENOUS), ASSEMBLY_TYPE(
+            "Assembly Type", "assembly_type", Group.MISCELLENOUS), SPACE_GROUP(
+            "Space Group", "spacegroup", Group.MISCELLENOUS), CATH_CODE(
+            "Cath Code", "cath_code", Group.CROSS_REFS), TAX_ID(
+            "Tax Id", "tax_id", Group.CROSS_REFS), TAX_QUERY(
+            "Tax Query", "tax_query", Group.CROSS_REFS), INTERACTING_ENTITY_ID(
+            "Interacting Entity Id", "interacting_entity_id",
+            Group.CROSS_REFS), INTERACTING_MOLECULES(
+            "Interacting Molecules", "interacting_molecules",
+            Group.MISCELLENOUS), PUBMED_ID("Pubmed Id", "pubmed_id",
+            Group.CROSS_REFS), STATUS("Status", "status",
+            Group.MISCELLENOUS), MODEL_QUALITY("Model Quality",
+            "model_quality", Group.QUALITY_MEASURES), PIVOT_RESOLUTION(
+            "Pivot Resolution", "pivot_resolution", Group.QUALITY_MEASURES), DATA_REDUCTION_SOFTWARE(
+            "Data reduction software", "data_reduction_software",
+            Group.PROCEDURE_AND_SOFTWARE), MAX_OBSERVED_RES(
+            "Max observed residues",
+            "max_observed_residues", Group.MISCELLENOUS), ORG_SCI_NAME(
+            "Organism scientific name", "organism_scientific_name",
+            Group.NAMES_AND_TAXONOMY), SUPER_KINGDOM("Super kingdom",
+            "superkingdom", Group.NAMES_AND_TAXONOMY), RANK("Rank", "rank",
+            Group.NAMES_AND_TAXONOMY), CRYSTALLISATION_PH(
+            "Crystallisation Ph",
+            "crystallisation_ph", Group.MISCELLENOUS), BIOLOGICAL_FUNCTION(
+            "Biological Function", "biological_function",
+            Group.MISCELLENOUS), BIOLOGICAL_PROCESS("Biological Process",
+            "biological_process", Group.MISCELLENOUS), BIOLOGICAL_CELL_COMPONENT(
+            "Biological Cell Component", "biological_cell_component",
+            Group.MISCELLENOUS), COMPOUND_NAME("Compound Name",
+            "compound_name", Group.NAMES_AND_TAXONOMY), COMPOUND_ID(
+            "Compound Id", "compound_id", Group.CROSS_REFS), COMPOUND_WEIGHT(
+            "Compound Weight", "compound_weight", Group.MISCELLENOUS), COMPOUND_SYSTEMATIC_NAME(
+            "Compound Systematic Name", "compound_systematic_name",
+            Group.NAMES_AND_TAXONOMY), INTERACTING_LIG(
+            "Interacting Ligands",
+            "interacting_ligands", Group.MISCELLENOUS), JOURNAL("Journal",
+            "journal", Group.MISCELLENOUS), ALL_AUTHORS("All Authors",
+            "all_authors", Group.MISCELLENOUS), EXPERIMENTAL_DATA_AVAILABLE(
+            "Experiment Data Available", "experiment_data_available",
+            Group.MISCELLENOUS), DIFFRACTION_PROTOCOL(
+            "Diffraction Protocol", "diffraction_protocol",
+            Group.PROCEDURE_AND_SOFTWARE), REFINEMENT_SOFTWARE(
+            "Refinement Software", "refinement_software",
+            Group.PROCEDURE_AND_SOFTWARE), STRUCTURE_DETERMINATION_METHOD(
+            "Structure Determination Method",
+            "structure_determination_method", Group.PROCEDURE_AND_SOFTWARE), SYNCHROTON_SITE(
+            "Synchrotron Site", "synchrotron_site", Group.MISCELLENOUS), SAMPLE_PREP_METHOD(
+            "Sample Preparation Method", "sample_preparation_method",
+            Group.PROCEDURE_AND_SOFTWARE), ENTRY_AUTHORS("Entry Authors",
+            "entry_authors", Group.MISCELLENOUS), CITATION_TITLE(
+            "Citation Title", "citation_title", Group.MISCELLENOUS), STRUCTURE_SOLUTION_SOFTWARE(
+            "Structure Solution Software", "structure_solution_software",
+            Group.PROCEDURE_AND_SOFTWARE), ENTRY_ENTITY("Entry Entity",
+            "entry_entity", Group.MISCELLENOUS), R_FREE("R Free", "r_free",
+            Group.QUALITY_MEASURES), NO_OF_POLYMER_ENTITIES(
+            "Number of Polymer Entities", "number_of_polymer_entities",
+            Group.MISCELLENOUS), NO_OF_BOUND_ENTITIES(
+            "Number of Bound Entities", "number_of_bound_entities",
+            Group.MISCELLENOUS), CRYSTALLISATION_RESERVOIR(
+            "Crystallisation Reservoir", "crystallisation_reservoir",
+            Group.MISCELLENOUS), DATA_SCALING_SW("Data Scalling Software",
+            "data_scaling_software", Group.PROCEDURE_AND_SOFTWARE), DETECTOR( 
+            "Detector", "detector", Group.MISCELLENOUS), DETECTOR_TYPE(
+            "Detector Type", "detector_type", Group.MISCELLENOUS), MODIFIED_RESIDUE_FLAG(
+            "Modified Residue Flag", "modified_residue_flag",
+            Group.MISCELLENOUS), NUMBER_OF_COPIES("Number of Copies",
+            "number_of_copies", Group.MISCELLENOUS), STRUCT_ASYM_ID(
+            "Struc Asym Id", "struct_asym_id",
+            Group.CROSS_REFS), HOMOLOGUS_PDB_ENTITY_ID(
+            "Homologus PDB Entity Id", "homologus_pdb_entity_id",
+            Group.CROSS_REFS), MOLECULE_SYNONYM(
+            "Molecule Synonym",
+            "molecule_synonym", Group.MISCELLENOUS), DEPOSITION_SITE(
+            "Deposition Site", "deposition_site", Group.MISCELLENOUS), SYNCHROTRON_BEAMLINE(
+            "Synchrotron Beamline", "synchrotron_beamline",
+            Group.MISCELLENOUS), ENTITY_ID("Entity Id", "entity_id",
+            Group.CROSS_REFS), BEAM_SOURCE_NAME(
+            "Beam Source Name",
+ "beam_source_name",
+            Group.NAMES_AND_TAXONOMY), PROCESSING_SITE(
+            "Processing Site", "processing_site", Group.MISCELLENOUS), ENTITY_WEIGHT(
+            "Entity Weight", "entity_weight", Group.MISCELLENOUS), VERSION(
+            "Version", "_version_", Group.MISCELLENOUS), ALL("ALL", "text",
+            Group.MISCELLENOUS);
+
+    public enum Group
+    {
+      DATE_OF("Date Of", 5), NAMES_AND_TAXONOMY("Names & Taxonomy", 3),
+      MISCELLENOUS("Miscellenous", 6), QUALITY_MEASURES("Quality Measures",
+              1), CROSS_REFS("Cross References", 2),
+      PROCEDURE_AND_SOFTWARE("Procedures & Softwares", 4);
+
+      Group(String name, int sortOrder)
+      {
+        this.name = name;
+        this.sortOrder = sortOrder;
+      }
+
+      private String name;
+
+      private int sortOrder;
+
+      public String getName()
+      {
+        return this.name;
+      }
+
+      public int getSortOrder()
+      {
+        return sortOrder;
+      }
+
+      @Override
+      public String toString()
+      {
+        return this.name;
+      }
+    };
+    private String name;
+
+    private String code;
+
+    private Group group;
+
+    PDBDocField(String name, String code, Group group)
+    {
+      this.name = name;
+      this.code = code;
+      this.group = group;
+    }
+
+    public String getName()
+    {
+      return name;
+    }
+
+    public String getCode()
+    {
+      return code;
+    }
+
+    public Group getGroup()
+    {
+      return group;
+    }
+
+    @Override
+    public String toString()
+    {
+      return name;
+    }
+  }
 }