Refactor AbstractConverter constructor (#1110)

src/main/java/run/halo/app/model/enums/converter/AbstractConverter.java

@@ -1,8 +1,11 @@
 package run.halo.app.model.enums.converter;
 
 import run.halo.app.model.enums.ValueEnum;
+import run.halo.app.utils.ReflectionUtils;
 
 import javax.persistence.AttributeConverter;
+import java.lang.reflect.Type;
+import java.util.Objects;
 
 /**
  * Abstract converter.
@@ -16,8 +19,12 @@ public abstract class AbstractConverter<E extends ValueEnum<V>, V> implements At
 
     private final Class<E> clazz;
 
-    protected AbstractConverter(Class<E> clazz) {
-        this.clazz = clazz;
+    @SuppressWarnings("unchecked")
+    protected AbstractConverter() {
+        Type enumType = Objects.requireNonNull(
+                ReflectionUtils.getParameterizedTypeBySuperClass(AbstractConverter.class, this.getClass())
+        ).getActualTypeArguments()[0];
+        this.clazz = (Class<E>) enumType;
     }
 
     @Override

src/main/java/run/halo/app/model/enums/converter/AttachmentTypeConverter.java

@@ -13,7 +13,4 @@ import javax.persistence.Converter;
 @Converter(autoApply = true)
 public class AttachmentTypeConverter extends AbstractConverter<AttachmentType, Integer> {
 
-    public AttachmentTypeConverter() {
-        super(AttachmentType.class);
-    }
 }

src/main/java/run/halo/app/model/enums/converter/CommentStatusConverter.java

@@ -13,8 +13,4 @@ import javax.persistence.Converter;
 @Converter(autoApply = true)
 public class CommentStatusConverter extends AbstractConverter<CommentStatus, Integer> {
 
-    public CommentStatusConverter() {
-        super(CommentStatus.class);
-    }
-
 }

src/main/java/run/halo/app/model/enums/converter/DataTypeConverter.java

@@ -13,7 +13,4 @@ import javax.persistence.Converter;
 @Converter(autoApply = true)
 public class DataTypeConverter extends AbstractConverter<DataType, Integer> {
 
-    public DataTypeConverter() {
-        super(DataType.class);
-    }
 }

src/main/java/run/halo/app/model/enums/converter/LogTypeConverter.java

@@ -13,7 +13,4 @@ import javax.persistence.Converter;
 @Converter(autoApply = true)
 public class LogTypeConverter extends AbstractConverter<LogType, Integer> {
 
-    public LogTypeConverter() {
-        super(LogType.class);
-    }
 }

src/main/java/run/halo/app/model/enums/converter/PostStatusConverter.java

@@ -13,7 +13,4 @@ import javax.persistence.Converter;
 @Converter(autoApply = true)
 public class PostStatusConverter extends AbstractConverter<PostStatus, Integer> {
 
-    public PostStatusConverter() {
-        super(PostStatus.class);
-    }
 }

src/main/java/run/halo/app/model/enums/converter/PostTypeConverter.java

@@ -14,7 +14,4 @@ import javax.persistence.Converter;
 @Deprecated
 public class PostTypeConverter extends AbstractConverter<PostType, Integer> {
 
-    public PostTypeConverter() {
-        super(PostType.class);
-    }
 }