#1259 - Throw explicit mapping error when an Enum is mapped to both ORDINAL and STRING

src/main/java/io/ebeaninternal/server/deploy/parse/DeployUtil.java

@@ -112,30 +112,16 @@ public class DeployUtil {
     if (!enumType.isEnum()) {
       throw new IllegalArgumentException("Class [" + enumType + "] is Not a Enum?");
     }
-    ScalarType<?> scalarType = typeManager.getScalarType(enumType);
-    if (enumOverrideDefaultMapping(enumerated, scalarType)) {
-      logger.debug("override default enum mapping for type {}", enumType);
-      scalarType = null;
-    }
-    if (scalarType == null) {
-      // look for @DbEnumValue or @EnumValue annotations etc
-      Class<? extends Enum<?>> enumClass = (Class<? extends Enum<?>>) enumType;
-      EnumType type = enumerated != null ? enumerated.value() : null;
-      scalarType = typeManager.createEnumScalarType(enumClass, type);
-    }
-    prop.setScalarType(scalarType);
-    prop.setDbType(scalarType.getJdbcType());
-  }
+    try {
+	    Class<? extends Enum<?>> enumClass = (Class<? extends Enum<?>>) enumType;
+	    EnumType type = enumerated != null ? enumerated.value() : null;
+      ScalarType<?> scalarType = typeManager.createEnumScalarType(enumClass, type);
+      prop.setScalarType(scalarType);
+      prop.setDbType(scalarType.getJdbcType());
 
-  /**
-   * Return true if there is an existing default mapping for the enum that needs
-   * to be overridden (for example, DayOfWeek defaults to Integer mapping 1 to 7
-   * and some might want this mapped to 'MONDAY' etc).
-   */
-  private boolean enumOverrideDefaultMapping(Enumerated enumerated, ScalarType<?> scalarType) {
-    return enumerated != null && scalarType != null
-      && enumerated.value() == EnumType.STRING
-      && scalarType.getJdbcType() != Types.VARCHAR;
+    } catch (IllegalStateException e) {
+      throw new PersistenceException("Error mapping property " + prop.getFullBeanName() + " - " + e.getMessage());
+    }
   }
 
   /**
@@ -304,7 +290,7 @@ public class DeployUtil {
     prop.setScalarType(scalarType);
   }
 
-  public boolean isClobType(Class<?> type) {
+  private boolean isClobType(Class<?> type) {
     return type.equals(String.class);
   }
 

src/main/java/io/ebeaninternal/server/type/DefaultTypeManager.java

@@ -271,6 +271,7 @@ public final class DefaultTypeManager implements TypeManager {
   public void addEnumType(ScalarType<?> scalarType, Class<? extends Enum> enumClass) {
 
     Set<Class<?>> mappedClasses = new HashSet<>();
+    mappedClasses.add(enumClass);
     for (Object value : EnumSet.allOf(enumClass).toArray()) {
       mappedClasses.add(value.getClass());
     }
@@ -552,7 +553,7 @@ public final class DefaultTypeManager implements TypeManager {
    * Return null if the EnumValue annotations are not present/used.
    * </p>
    */
-  private ScalarType<?> createEnumScalarType2(Class<?> enumType) {
+  private ScalarTypeEnum<?> createEnumScalarType2(Class<?> enumType) {
 
     boolean integerType = true;
 
@@ -589,8 +590,11 @@ public final class DefaultTypeManager implements TypeManager {
   @Override
   public ScalarType<?> createEnumScalarType(Class<? extends Enum<?>> enumType, EnumType type) {
 
-    ScalarType<?> scalarType = getScalarType(enumType);
-    if (scalarType != null) {
+    ScalarTypeEnum<?> scalarType = (ScalarTypeEnum<?>) getScalarType(enumType);
+    if (scalarType != null && !scalarType.isOverrideBy(type)) {
+      if (type != null && !scalarType.isCompatible(type)) {
+        throw new IllegalStateException("Error mapping Enum type:"+enumType+" It is mapped using 2 different modes when only one is supported (ORDINAL, STRING or an Ebean mapping)");
+      }
       return scalarType;
     }
 
@@ -603,7 +607,7 @@ public final class DefaultTypeManager implements TypeManager {
     return scalarType;
   }
 
-  private ScalarType<?> createEnumScalarTypePerSpec(Class<?> enumType, EnumType type) {
+  private ScalarTypeEnum<?> createEnumScalarTypePerSpec(Class<?> enumType, EnumType type) {
     if (type == null) {
       // default as per spec is ORDINAL
       return new ScalarTypeEnumStandard.OrdinalEnum(enumType);
@@ -616,7 +620,7 @@ public final class DefaultTypeManager implements TypeManager {
     }
   }
 
-  private ScalarType<?> createEnumScalarTypePerExtentions(Class<? extends Enum<?>> enumType) {
+  private ScalarTypeEnum<?> createEnumScalarTypePerExtentions(Class<? extends Enum<?>> enumType) {
 
     Method[] methods = enumType.getMethods();
     for (Method method : methods) {
@@ -638,7 +642,7 @@ public final class DefaultTypeManager implements TypeManager {
    * Return null if the EnumValue annotations are not present/used.
    * </p>
    */
-  private ScalarType<?> createEnumScalarTypeDbValue(Class<? extends Enum<?>> enumType, Method method, boolean integerType) {
+  private ScalarTypeEnum<?> createEnumScalarTypeDbValue(Class<? extends Enum<?>> enumType, Method method, boolean integerType) {
 
     Map<String, String> nameValueMap = new HashMap<>();
 
@@ -664,7 +668,7 @@ public final class DefaultTypeManager implements TypeManager {
    * length create the ScalarType for the Enum.
    */
   @SuppressWarnings({"unchecked", "rawtypes"})
-  private ScalarType<?> createEnumScalarType(Class enumType, Map<String, String> nameValueMap, boolean integerType, int dbColumnLength) {
+  private ScalarTypeEnum<?> createEnumScalarType(Class enumType, Map<String, String> nameValueMap, boolean integerType, int dbColumnLength) {
 
     EnumToDbValueMap<?> beanDbMap = EnumToDbValueMap.create(integerType);
 

src/main/java/io/ebeaninternal/server/type/ScalarTypeDayOfWeek.java

@@ -1,5 +1,6 @@
 package io.ebeaninternal.server.type;
 
+import javax.persistence.EnumType;
 import java.sql.SQLException;
 import java.sql.Types;
 import java.time.DayOfWeek;
@@ -22,6 +23,14 @@ public class ScalarTypeDayOfWeek extends ScalarTypeEnumWithMapping {
     super(beanDbMap, DayOfWeek.class, 1);
   }
 
+  /**
+   * We allow this to be overridden by a JPA EnumType.
+   */
+  @Override
+  public boolean isOverrideBy(EnumType type) {
+    return type != null;
+  }
+
   /**
    * Bind DayOfWeek enum using getValue().
    */

src/main/java/io/ebeaninternal/server/type/ScalarTypeEnum.java

@@ -1,15 +1,29 @@
 package io.ebeaninternal.server.type;
 
+import javax.persistence.EnumType;
 import java.util.Set;
 
 /**
  * Marker interface for the Enum scalar types.
  */
-public interface ScalarTypeEnum {
+public interface ScalarTypeEnum<T> extends ScalarType<T> {
 
   /**
    * Return the IN values for DB constraint construction.
    */
   Set<String> getDbCheckConstraintValues();
 
+  /**
+   * Return true if we allow this scalar enum type to be overridden.
+   * Ability to override the built-in support for java time DayOfWeek and Month.
+   */
+  default boolean isOverrideBy(EnumType type) {
+    return false;
+  }
+
+  /**
+   * Return true if the scalar type is compatible with the specified enum type.
+   */
+  boolean isCompatible(EnumType enumType);
+
 }

src/main/java/io/ebeaninternal/server/type/ScalarTypeEnumStandard.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.core.JsonParser;
 import io.ebean.text.TextException;
 import io.ebeanservice.docstore.api.mapping.DocPropertyType;
 
+import javax.persistence.EnumType;
 import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
@@ -40,6 +41,11 @@ public class ScalarTypeEnumStandard {
       this.length = maxValueLength(enumType);
     }
 
+    @Override
+    public boolean isCompatible(EnumType enumType) {
+      return EnumType.STRING == enumType;
+    }
+
     /**
      * Return the IN values for DB constraint construction.
      */
@@ -128,6 +134,11 @@ public class ScalarTypeEnumStandard {
       this.enumArray = EnumSet.allOf(enumType).toArray();
     }
 
+    @Override
+    public boolean isCompatible(EnumType enumType) {
+      return EnumType.ORDINAL == enumType;
+    }
+
     /**
      * Return the IN values for DB constraint construction.
      */

src/main/java/io/ebeaninternal/server/type/ScalarTypeEnumWithMapping.java

@@ -1,5 +1,6 @@
 package io.ebeaninternal.server.type;
 
+import javax.persistence.EnumType;
 import java.sql.SQLException;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
@@ -24,6 +25,11 @@ public class ScalarTypeEnumWithMapping extends ScalarTypeEnumStandard.EnumBase i
     this.length = length;
   }
 
+  @Override
+  public boolean isCompatible(EnumType enumType) {
+    return enumType == null;
+  }
+
   @Override
   public long asVersion(Object value) {
     throw new RuntimeException("not supported");

src/main/java/io/ebeaninternal/server/type/ScalarTypeMonth.java

@@ -1,5 +1,6 @@
 package io.ebeaninternal.server.type;
 
+import javax.persistence.EnumType;
 import java.sql.SQLException;
 import java.sql.Types;
 import java.time.Month;
@@ -22,6 +23,14 @@ public class ScalarTypeMonth extends ScalarTypeEnumWithMapping {
     super(beanDbMap, Month.class, 1);
   }
 
+  /**
+   * We allow this to be overridden by a JPA EnumType.
+   */
+  @Override
+  public boolean isOverrideBy(EnumType type) {
+    return type != null;
+  }
+
   /**
    * Bind Month enum value.
    */