Add DDL for Field table.

Also, a new build process that uses docker to build parts that fail on Macs

.env

@@ -2,7 +2,7 @@ COMPOSE__FILE=docker-compose.yml:./optional/docker-db-compose.yml
 SQL_HOST=192.168.1.71
 SQL_USER=mpede
 SQL_PASSWORD=password
-#SQL_DB_DRIVER=com.mysql.cj.jdbc.Driver
+SQL_DB_DRIVER=com.mysql.cj.jdbc.Driver
-SQL_DB_DRIVER=org.postgresql.Driver
+#SQL_DB_DRIVER=org.postgresql.Driver
-#SQL_CONNECTION_STR=jdbc:mysql://192.168.1.71/reso_data_dictionary_1_7?autoReconnect=true&maxReconnects=4&user=mpede&password=password
+SQL_CONNECTION_STR=jdbc:mysql://192.168.1.71/reso_data_dictionary_1_7?autoReconnect=true&maxReconnects=4&user=mpede&password=password
-SQL_CONNECTION_STR=jdbc:postgresql://192.168.1.71:5432/reso_data_dictionary_1_7?autoReconnect=true&maxReconnects=4
+#SQL_CONNECTION_STR=jdbc:postgresql://192.168.1.71:5432/reso_data_dictionary_1_7?autoReconnect=true&maxReconnects=4

build.sh

@@ -5,40 +5,8 @@ HOME_DIR=`dirname ${REAL_VAR0}`
 TEMP_DIR="${HOME_DIR}/temp"
 SQL_DIR="${HOME_DIR}/sql"
 
-# Ensure we have directories set up
+docker build -t reso-builder -f docker/docker-builder .
-[ -d "${TEMP_DIR}" ] && echo "temp directory found." ||  mkdir ${TEMP_DIR}
+docker run --name builder --mount type=bind,source="${HOME_DIR}",target=/usr/src/app -t reso-builder
-[ -d "${SQL_DIR}" ] && echo "sql directory found." ||  mkdir ${SQL_DIR}
-
-if [ -z "${SQL_HOST}" ]
-then
-  # Get the Web API Commander, needed to generate the test database
-  if ! wget https://github.com/RESOStandards/web-api-commander/releases/download/current-version/web-api-commander.jar -O temp/web-api-commander.jar
-  then
-    echo "WGET not installed. trying CURL."
-    if ! curl -L https://github.com/RESOStandards/web-api-commander/releases/download/current-version/web-api-commander.jar --output  temp/web-api-commander.jar
-    then
-      echo "CURL not installed. Exiting build."
-      exit
-    fi
-  fi
-
-  java -jar temp/web-api-commander.jar --generateReferenceDDL --useKeyNumeric > sql/reso-reference-ddl-dd-1.7.numeric-keys.sql
-
-  # The following lines should be independent of the SQL logic.
-  java -jar temp/web-api-commander.jar --generateResourceInfoModels
-  mv ResourceInfoModels/* src/main/java/org/reso/service/data/definition/
-
-else
-  COMPOSE_FILE="docker-compose.yml"
-fi
-
-if ! mvn compile
-then
-  echo "Maven could not be found."
-  exit
-else
-  mvn package
-fi
 
 if ! docker-compose build
 then

docker/docker-builder

@@ -0,0 +1,7 @@
+FROM ubuntu:20.10
+
+WORKDIR /usr/src/app
+
+RUN apt-get update && apt-get install -y wget curl pip maven docker-compose
+
+CMD ./docker/scripts/build.sh

docker/scripts/build.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+REAL_VAR0=`readlink -f $0`
+HOME_DIR=`dirname ${REAL_VAR0}`
+TEMP_DIR="${HOME_DIR}/temp"
+SQL_DIR="${HOME_DIR}/sql"
+
+# Ensure we have directories set up
+[ -d "${TEMP_DIR}" ] && echo "temp directory found." ||  mkdir ${TEMP_DIR}
+[ -d "${SQL_DIR}" ] && echo "sql directory found." ||  mkdir ${SQL_DIR}
+
+if [ -z "${SQL_HOST}" ]
+then
+  # Get the Web API Commander, needed to generate the test database
+  if ! wget https://github.com/RESOStandards/web-api-commander/releases/download/current-version/web-api-commander.jar -O temp/web-api-commander.jar
+  then
+    echo "WGET not installed. trying CURL."
+    if ! curl -L https://github.com/RESOStandards/web-api-commander/releases/download/current-version/web-api-commander.jar --output  temp/web-api-commander.jar
+    then
+      echo "CURL not installed. Exiting build."
+      exit
+    fi
+  fi
+
+  java -jar temp/web-api-commander.jar --generateReferenceDDL --useKeyNumeric > sql/reso-reference-ddl-dd-1.7.numeric-keys.sql
+
+  # The following lines should be independent of the SQL logic.
+  java -jar temp/web-api-commander.jar --generateResourceInfoModels
+  mv ResourceInfoModels/* src/main/java/org/reso/service/data/definition/
+
+else
+  COMPOSE_FILE="docker-compose.yml"
+fi
+
+if ! mvn compile
+then
+  echo "Maven could not be found."
+  exit
+else
+  mvn package
+fi
+

src/main/java/org/reso/service/data/GenericEntityCollectionProcessor.java

@@ -85,7 +85,16 @@ public class GenericEntityCollectionProcessor implements EntityCollectionProcess
 
       // 2nd: fetch the data from backend for this requested EntitySetName
       // it has to be delivered as EntitySet object
-      EntityCollection entitySet = getData(edmEntitySet, uriInfo, isCount, resource);
+      EntityCollection entitySet;
+
+      if (resource.useCustomDatasource() )
+      {
+         entitySet = resource.getData(edmEntitySet, uriInfo, isCount);
+      }
+      else
+      {
+         entitySet = getData(edmEntitySet, uriInfo, isCount, resource);
+      }
 
       // 3rd: create a serializer based on the requested format (json)
       try

src/main/java/org/reso/service/data/GenericEntityProcessor.java

@@ -65,7 +65,15 @@ public class GenericEntityProcessor implements EntityProcessor
 
       // 2. retrieve the data from backend
       List<UriParameter> keyPredicates = uriResourceEntitySet.getKeyPredicates();
-      Entity entity = getData(edmEntitySet, keyPredicates, resource);
+      Entity entity;
+      if (resource.useCustomDatasource() )
+      {
+         entity = resource.getData(edmEntitySet, keyPredicates);
+      }
+      else
+      {
+         entity = getData(edmEntitySet, keyPredicates, resource);
+      }
 
       // 3. serialize
       EdmEntityType entityType = edmEntitySet.getEntityType();

src/main/java/org/reso/service/data/definition/custom/FieldDefinition.java

@@ -0,0 +1,221 @@
+package org.reso.service.data.definition.custom;
+
+import org.apache.olingo.commons.api.data.Entity;
+import org.apache.olingo.commons.api.data.EntityCollection;
+import org.apache.olingo.commons.api.data.Property;
+import org.apache.olingo.commons.api.data.ValueType;
+import org.apache.olingo.commons.api.edm.EdmEntitySet;
+import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeKind;
+import org.apache.olingo.commons.api.edm.provider.CsdlAnnotation;
+import org.apache.olingo.commons.api.edm.provider.CsdlEntitySet;
+import org.apache.olingo.server.api.ODataApplicationException;
+import org.apache.olingo.server.api.uri.UriInfo;
+import org.apache.olingo.server.api.uri.UriParameter;
+import org.apache.olingo.server.api.uri.queryoption.FilterOption;
+import org.apache.olingo.server.api.uri.queryoption.expression.ExpressionVisitException;
+import org.reso.service.data.common.CommonDataProcessing;
+import org.reso.service.data.meta.BreakdownOfFilterExpressionVisitor;
+import org.reso.service.data.meta.FieldInfo;
+import org.reso.service.data.meta.MySQLFilterExpressionVisitor;
+import org.reso.service.data.meta.ResourceInfo;
+
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.sql.Timestamp;
+import java.util.*;
+
+public class FieldDefinition extends ResourceInfo
+{
+   private static String STANDARD_NAME = "RESO.OData.Metadata.StandardName";
+
+   private static ArrayList<FieldInfo> fieldList = null;
+   private ArrayList<ResourceInfo> resources;
+
+   public FieldDefinition()
+   {
+      this.tableName = "field";  // Never used
+      this.resourcesName = "Field";
+      this.resourceName = "Field";
+   }
+
+   public ArrayList<FieldInfo> getFieldList()
+   {
+      return FieldDefinition.getStaticFieldList();
+   }
+
+   public static ArrayList<FieldInfo> getStaticFieldList()
+   {
+      if (null!= FieldDefinition.fieldList)
+      {
+         return FieldDefinition.fieldList;
+      }
+
+      ArrayList<FieldInfo> list = new ArrayList<FieldInfo>();
+      FieldDefinition.fieldList = list;
+      FieldInfo fieldInfo = null;
+
+      fieldInfo = new FieldInfo("FieldKey", EdmPrimitiveTypeKind.String.getFullQualifiedName());
+      fieldInfo.addAnnotation("Field Key Field", "RESO.OData.Metadata.DisplayName");
+      list.add(fieldInfo);
+
+      fieldInfo = new FieldInfo("ResourceName", EdmPrimitiveTypeKind.String.getFullQualifiedName());
+      list.add(fieldInfo);
+
+      fieldInfo = new FieldInfo("FieldName", EdmPrimitiveTypeKind.String.getFullQualifiedName());
+      list.add(fieldInfo);
+
+      fieldInfo = new FieldInfo("DisplayName", EdmPrimitiveTypeKind.String.getFullQualifiedName());
+      list.add(fieldInfo);
+
+      fieldInfo = new FieldInfo("ModificationTimestamp", EdmPrimitiveTypeKind.DateTimeOffset.getFullQualifiedName());
+      list.add(fieldInfo);
+
+      return FieldDefinition.fieldList;
+   }
+
+   public Boolean useCustomDatasource() { return true; }
+
+   public Entity getData(EdmEntitySet edmEntitySet, List<UriParameter> keyPredicates)
+   {
+      ArrayList<FieldInfo> fields = this.getFieldList();
+
+      Entity product = null;
+
+      Map<String, String> properties = System.getenv();
+
+      try {
+
+         String sqlCriteria = null;
+
+         // Statements allow to issue SQL queries to the database
+         Statement statement = null;
+         // Result set get the result of the SQL query
+         String queryString = null;
+
+         for (final UriParameter key : keyPredicates)
+         {
+            // key
+            String keyName = key.getName().toLowerCase();
+            String keyValue = key.getText();
+            if (sqlCriteria==null)
+            {
+               sqlCriteria = keyName + " = " + keyValue;
+            }
+            else
+            {
+               sqlCriteria = sqlCriteria + " and " + keyName + " = " + keyValue;
+            }
+         }
+
+         queryString = "select * from " + this.getTableName();
+
+         if (null!=sqlCriteria && sqlCriteria.length()>0)
+         {
+            queryString = queryString + " WHERE " + sqlCriteria;
+         }
+
+         LOG.info("SQL Query: "+queryString);
+         ResultSet resultSet = statement.executeQuery(queryString);
+
+         String primaryFieldName = this.getPrimaryKeyName();
+
+         // add the lookups from the database.
+         while (resultSet.next())
+         {
+            Entity ent = CommonDataProcessing.getEntityFromRow(resultSet, this, null);
+
+            product = ent;
+         }
+
+         statement.close();
+
+      } catch (Exception e) {
+         LOG.error("Server Error occurred in reading "+this.getResourceName(), e);
+         return product;
+      }
+
+      return product;
+   }
+
+   public EntityCollection getData(EdmEntitySet edmEntitySet, UriInfo uriInfo, boolean isCount) throws ODataApplicationException
+   {
+      EntityCollection entCollection = new EntityCollection();
+      List<Entity> productList = entCollection.getEntities();
+
+      FilterOption filter = uriInfo.getFilterOption();
+
+      BreakdownOfFilterExpressionVisitor customExpression = new BreakdownOfFilterExpressionVisitor(this);
+      try
+      {
+         String criteria = filter.getExpression().accept(customExpression);
+      }
+      catch (ExpressionVisitException e)
+      {
+         LOG.error("Server Error occurred in reading "+this.getResourceName(), e);
+         return entCollection;
+      }
+
+      HashMap<String,String> reps = customExpression.getRepresentations();
+
+      String resourceName = reps.remove("ResourceName");
+      resourceName = resourceName.substring(1,resourceName.length()-1);
+
+      ResourceInfo res = null;
+
+      for (ResourceInfo defn :resources)
+      {
+         if (resourceName.equals(defn.getResourcesName()))
+         {
+            res = defn;
+            break;
+         }
+      }
+
+      ArrayList<FieldInfo> resourceFieldList = res.getFieldList();
+
+      for (FieldInfo field: resourceFieldList)
+      {
+         HashMap<String,Object> entityValues = new HashMap<>();
+         entityValues.put("FieldKey", field.getFieldName());
+         entityValues.put("FieldName", field.getFieldName());
+         entityValues.put("ResourceName", resourceName);
+         entityValues.put("DisplayName", field.getFieldName());
+         Date date = new Date();
+         entityValues.put("ModificationTimestamp", date);
+
+         boolean match = true;
+
+         for (String key: reps.keySet() )
+         {
+            String toMatch = reps.get(key);
+            toMatch = toMatch.substring(1,toMatch.length()-1);
+            String value = entityValues.get(key).toString();
+            if (!toMatch.equals(value))
+            {
+               match = false;
+               break;
+            }
+         }
+
+         if (match)
+         {
+            Entity ent = new Entity();
+            ent.addProperty(new Property(null, "FieldKey", ValueType.PRIMITIVE, field.getFieldName()));
+            ent.addProperty(new Property(null, "FieldName", ValueType.PRIMITIVE, field.getFieldName()));
+            ent.addProperty(new Property(null, "ResourceName", ValueType.PRIMITIVE, resourceName));
+
+            String displayName = field.getFieldName();
+            ent.addProperty(new Property(null, "DisplayName", ValueType.PRIMITIVE, displayName));
+            ent.addProperty(new Property(null, "ModificationTimestamp", ValueType.PRIMITIVE, date ));
+            productList.add(ent);
+         }
+      }
+
+      return entCollection;
+   }
+
+   public void addResources(ArrayList<ResourceInfo> resources)
+   {
+      this.resources = resources;
+   }
+}

src/main/java/org/reso/service/data/meta/BreakdownOfFilterExpressionVisitor.java

@@ -0,0 +1,179 @@
+package org.reso.service.data.meta;
+
+
+import org.apache.olingo.commons.api.edm.EdmEnumType;
+import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeKind;
+import org.apache.olingo.commons.api.edm.EdmType;
+import org.apache.olingo.commons.api.http.HttpStatusCode;
+import org.apache.olingo.server.api.ODataApplicationException;
+import org.apache.olingo.server.api.uri.UriResource;
+import org.apache.olingo.server.api.uri.UriResourcePrimitiveProperty;
+import org.apache.olingo.server.api.uri.queryoption.expression.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.*;
+
+public class BreakdownOfFilterExpressionVisitor implements ExpressionVisitor<String>
+{
+   private static final Logger                          LOG              = LoggerFactory.getLogger(MySQLFilterExpressionVisitor.class);
+   private static final Map<BinaryOperatorKind, String> BINARY_OPERATORS = new HashMap<BinaryOperatorKind, String>() {{
+      put(BinaryOperatorKind.ADD, " + ");
+      put(BinaryOperatorKind.AND, " AND ");
+      put(BinaryOperatorKind.DIV, " / ");
+      put(BinaryOperatorKind.EQ, " = ");
+      put(BinaryOperatorKind.GE, " >= ");
+      put(BinaryOperatorKind.GT, " > ");
+      put(BinaryOperatorKind.LE, " <= ");
+      put(BinaryOperatorKind.LT, " < ");
+      put(BinaryOperatorKind.MOD, " % ");
+      put(BinaryOperatorKind.MUL, " * ");
+      put(BinaryOperatorKind.NE, " <> ");
+      put(BinaryOperatorKind.OR, " OR ");
+      put(BinaryOperatorKind.SUB, " - ");
+   }};
+
+   private HashMap<String,String> representations = new HashMap<>();
+
+   private ResourceInfo resourceInfo;
+
+   public BreakdownOfFilterExpressionVisitor(ResourceInfo resourceInfo) {
+      this.resourceInfo = resourceInfo;
+   }
+
+   public HashMap<String,String> getRepresentations()
+   {
+      return representations;
+   }
+
+   @Override
+   public String visitBinaryOperator(BinaryOperatorKind operator, String left, String right)
+            throws ExpressionVisitException, ODataApplicationException
+   {
+      String strOperator = BINARY_OPERATORS.get(operator);
+
+      if (strOperator == null) {
+         throw new ODataApplicationException("Unsupported binary operation: " + operator.name(),
+                                             operator == BinaryOperatorKind.HAS ?
+                                                      HttpStatusCode.NOT_IMPLEMENTED.getStatusCode() :
+                                                      HttpStatusCode.BAD_REQUEST.getStatusCode(), Locale.ENGLISH);
+      }
+      // ResourceName eq 'Property' becomes (=, ResourceName, Property)
+      if ( "=".equals(strOperator.trim() ) )  // We only want the equals operator from the filter.  Assume all are AND ops for now if there are multiples.
+      { // @TODO: Make this filter more robust for queries
+         representations.put(left,right);
+      }
+      return left + strOperator + right;
+   }
+
+   // @TODO I'm unsure where this would be called.
+   @Override public String visitBinaryOperator(BinaryOperatorKind operator, String s, List<String> list)
+            throws ExpressionVisitException, ODataApplicationException
+   {
+      String strOperator = BINARY_OPERATORS.get(operator);
+      throw new ODataApplicationException("Unsupported binary operation: " + operator.name(),
+                                          operator == BinaryOperatorKind.HAS ?
+                                                   HttpStatusCode.NOT_IMPLEMENTED.getStatusCode() :
+                                                   HttpStatusCode.BAD_REQUEST.getStatusCode(), Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitUnaryOperator(UnaryOperatorKind operator, String operand)
+            throws ExpressionVisitException, ODataApplicationException {
+      switch (operator) {
+         case NOT:
+            return "NOT " + operand;
+         case MINUS:
+            return "-" + operand;
+      }
+      throw new ODataApplicationException("Wrong unary operator: " + operator,
+                                          HttpStatusCode.BAD_REQUEST.getStatusCode(), Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitMethodCall(MethodKind methodCall, List<String> parameters)
+            throws ExpressionVisitException, ODataApplicationException {
+      if (parameters.isEmpty() && methodCall.equals(MethodKind.NOW)) {
+         return "CURRENT_DATE";
+      }
+      String firsEntityParam = parameters.get(0);
+      switch (methodCall) {
+         case CONTAINS:
+            return firsEntityParam + " LIKE '%" + extractFromStringValue(parameters.get(1)) + "%'";
+         case STARTSWITH:
+            return firsEntityParam + " LIKE '" + extractFromStringValue(parameters.get(1)) + "%'";
+         case ENDSWITH:
+            return firsEntityParam + " LIKE '%" + extractFromStringValue(parameters.get(1));
+         case DAY:
+            return "DAY(" + firsEntityParam + ")";
+         case MONTH:
+            return "MONTH(" + firsEntityParam + ")";
+         case YEAR:
+            return "YEAR(" + firsEntityParam + ")";
+      }
+      throw new ODataApplicationException("Method call " + methodCall + " not implemented",
+                                          HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitLiteral(Literal literal) throws ExpressionVisitException, ODataApplicationException {
+      String literalAsString = literal.getText();
+      if (literal.getType() == null) {
+         literalAsString = "NULL";
+      }
+
+      return literalAsString;
+   }
+
+   @Override
+   public String visitMember(Member member) throws ExpressionVisitException, ODataApplicationException {
+      List<UriResource> resources = member.getResourcePath().getUriResourceParts();
+
+      UriResource first = resources.get(0);
+
+      // TODO: Enum and ComplexType; joins
+      if (resources.size() == 1 && first instanceof UriResourcePrimitiveProperty) {
+         UriResourcePrimitiveProperty primitiveProperty = (UriResourcePrimitiveProperty) first;
+         return primitiveProperty.getProperty().getName();
+      } else {
+         throw new ODataApplicationException("Only primitive properties are implemented in filter expressions",
+                                             HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ENGLISH);
+      }
+   }
+
+   @Override
+   public String visitEnum(EdmEnumType type, List<String> enumValues)
+            throws ExpressionVisitException, ODataApplicationException {
+      throw new ODataApplicationException("Enums are not implemented", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(),
+                                          Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitLambdaExpression(String lambdaFunction, String lambdaVariable, Expression expression)
+            throws ExpressionVisitException, ODataApplicationException {
+      throw new ODataApplicationException("Lambda expressions are not implemented",
+                                          HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitAlias(String aliasName) throws ExpressionVisitException, ODataApplicationException {
+      throw new ODataApplicationException("Aliases are not implemented",
+                                          HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitTypeLiteral(EdmType type) throws ExpressionVisitException, ODataApplicationException {
+      throw new ODataApplicationException("Type literals are not implemented",
+                                          HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ENGLISH);
+   }
+
+   @Override
+   public String visitLambdaReference(String variableName) throws ExpressionVisitException, ODataApplicationException {
+      throw new ODataApplicationException("Lambda references are not implemented",
+                                          HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ENGLISH);
+   }
+
+   private String extractFromStringValue(String val) {
+      return val.substring(1, val.length() - 1);
+   }
+}

src/main/java/org/reso/service/data/meta/FieldInfo.java

@@ -41,7 +41,8 @@ public class FieldInfo
 
    public String getFieldName()
    {
-      return fieldName.toLowerCase();
+      return fieldName;
+      //return fieldName.toLowerCase();  // For PostgreSQL.  Not currently supported, but here if you want to play with it.
    }
    public String getODATAFieldName()
    {

src/main/java/org/reso/service/data/meta/ResourceInfo.java

@@ -2,9 +2,14 @@ package org.reso.service.data.meta;
 
 
 import org.apache.olingo.commons.api.data.Entity;
+import org.apache.olingo.commons.api.data.EntityCollection;
 import org.apache.olingo.commons.api.data.Property;
 import org.apache.olingo.commons.api.data.ValueType;
+import org.apache.olingo.commons.api.edm.EdmEntitySet;
 import org.apache.olingo.commons.api.edm.FullQualifiedName;
+import org.apache.olingo.server.api.ODataApplicationException;
+import org.apache.olingo.server.api.uri.UriInfo;
+import org.apache.olingo.server.api.uri.UriParameter;
 import org.reso.service.data.common.CommonDataProcessing;
 import org.reso.service.servlet.RESOservlet;
 import org.slf4j.Logger;
@@ -12,6 +17,7 @@ import org.slf4j.LoggerFactory;
 
 import java.sql.*;
 import java.util.ArrayList;
+import java.util.List;
 
 public class ResourceInfo
 {
@@ -52,6 +58,8 @@ public class ResourceInfo
       return null;
    }
 
+   public Boolean useCustomDatasource() { return false; }
+
    public FullQualifiedName getFqn(String namespace)
    {
       if (this.fqn==null)
@@ -90,4 +98,14 @@ public class ResourceInfo
       this.primaryKeyName = primaryKey;
    }
 
+
+   public Entity getData(EdmEntitySet edmEntitySet, List<UriParameter> keyPredicates)
+   {
+      return null;
+   }
+
+   public EntityCollection getData(EdmEntitySet edmEntitySet, UriInfo uriInfo, boolean isCount) throws ODataApplicationException
+   {
+      return null;
+   }
 }

src/main/java/org/reso/service/servlet/RESOservlet.java

@@ -9,6 +9,7 @@ import org.apache.olingo.server.api.ServiceMetadata;
 import org.reso.service.data.GenericEntityCollectionProcessor;
 import org.reso.service.data.GenericEntityProcessor;
 import org.reso.service.data.definition.LookupDefinition;
+import org.reso.service.data.definition.custom.FieldDefinition;
 import org.reso.service.data.meta.ResourceInfo;
 import org.reso.service.edmprovider.RESOedmProvider;
 import org.reso.service.security.providers.BasicAuthProvider;
@@ -81,23 +82,13 @@ public class RESOservlet extends HttpServlet
          }
          else LOG.info("DB String unknown form: "+dbConnString);
       }
-      LOG.info("DB String empty");
 
       try {
          Class.forName(dbDriverStr).newInstance();
          LOG.debug("looking to connect to " + dbConnString);
 
-         if (this.dbType.equals("mysql"))
-         {
-
-            connect = DriverManager
-                     .getConnection(dbConnString);
-         }
-         else if (this.dbType.equals("postgresql"))
-         {
          connect = DriverManager
                   .getConnection(dbConnString,dbUser,dbPwd);
-         }
 
 
       } catch (Exception e) {
@@ -116,6 +107,11 @@ public class RESOservlet extends HttpServlet
 
       ArrayList<ResourceInfo> resources = new ArrayList<>();
 
+      // We are going to use a custom field definition to query Fields
+      FieldDefinition fieldDefinition = new FieldDefinition();
+      resources.add(fieldDefinition);
+      fieldDefinition.addResources(resources);
+
       // Get all classes with constructors with 0 parameters.  LookupDefinition should not work.
       try
       {
@@ -133,10 +129,17 @@ public class RESOservlet extends HttpServlet
             {
                ctor.setAccessible(true);
                ResourceInfo resource = (ResourceInfo)ctor.newInstance();
+
+               try
+               {
+                  resource.findPrimaryKey(this.connect);
                   resources.add(resource);
                   resourceLookup.put(resource.getResourceName(), resource);
-
+               }
-               resource.findPrimaryKey(this.connect);
+               catch (Exception e)
+               {
+                  LOG.error("Error with: "+resource.getResourceName()+" - "+e.getMessage());
+               }
             }
          }
       }