#19 - Add MemberDetails#toJavaMember

Author: sebersole

src/main/java/org/hibernate/models/internal/dynamic/DynamicFieldDetails.java

@@ -6,6 +6,8 @@
  */
 package org.hibernate.models.internal.dynamic;
 
+import java.lang.reflect.Member;
+
 import org.hibernate.models.internal.MutableMemberDetails;
 import org.hibernate.models.spi.ClassDetails;
 import org.hibernate.models.spi.FieldDetails;
@@ -53,6 +55,11 @@ public int getModifiers() {
 		return modifierFlags;
 	}
 
+	@Override
+	public Member toJavaMember() {
+		return null;
+	}
+
 	@Override
 	public String toString() {
 		return "DynamicFieldDetails(" + name + ")";

src/main/java/org/hibernate/models/internal/dynamic/DynamicMethodDetails.java

@@ -6,6 +6,7 @@
  */
 package org.hibernate.models.internal.dynamic;
 
+import java.lang.reflect.Member;
 import java.util.List;
 
 import org.hibernate.models.internal.ModifierUtils;
@@ -71,6 +72,11 @@ public int getModifiers() {
 		return modifierFlags;
 	}
 
+	@Override
+	public Member toJavaMember() {
+		return null;
+	}
+
 	@Override
 	public ClassDetails getReturnType() {
 		return returnType;

src/main/java/org/hibernate/models/internal/dynamic/MapModeFieldDetails.java

@@ -6,6 +6,8 @@
  */
 package org.hibernate.models.internal.dynamic;
 
+import java.lang.reflect.Member;
+
 import org.hibernate.models.internal.MutableMemberDetails;
 import org.hibernate.models.spi.ClassDetails;
 import org.hibernate.models.spi.FieldDetails;
@@ -60,6 +62,11 @@ public boolean isPersistable() {
 		return true;
 	}
 
+	@Override
+	public Member toJavaMember() {
+		return null;
+	}
+
 	@Override
 	public String toString() {
 		return "MapModeFieldDetails(" + name + ")";

src/main/java/org/hibernate/models/internal/jandex/JandexFieldDetails.java

@@ -6,6 +6,9 @@
  */
 package org.hibernate.models.internal.jandex;
 
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+
 import org.hibernate.models.internal.MutableMemberDetails;
 import org.hibernate.models.spi.ClassDetails;
 import org.hibernate.models.spi.FieldDetails;
@@ -57,6 +60,33 @@ public int getModifiers() {
 		return fieldInfo.flags();
 	}
 
+	private Member underlyingMember;
+
+	@Override
+	public Member toJavaMember() {
+		if ( underlyingMember == null ) {
+			underlyingMember = resolveJavaMember();
+		}
+		return underlyingMember;
+	}
+
+	private Field resolveJavaMember() {
+		final Class<?> declaringJavaClass = declaringType.toJavaClass();
+		try {
+			return declaringJavaClass.getField( fieldInfo.name() );
+		}
+		catch (NoSuchFieldException e) {
+			throw new RuntimeException(
+					String.format(
+							"Jandex FieldInfo had no corresponding Field : %s.%s",
+							declaringType.getName(),
+							fieldInfo.name()
+					),
+					e
+			);
+		}
+	}
+
 	@Override
 	public String toString() {
 		return "JandexFieldDetails(" + getName() + ")";

src/main/java/org/hibernate/models/internal/jandex/JandexMethodDetails.java

@@ -6,6 +6,7 @@
  */
 package org.hibernate.models.internal.jandex;
 
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
@@ -18,6 +19,7 @@
 
 import org.jboss.jandex.AnnotationTarget;
 import org.jboss.jandex.MethodInfo;
+import org.jboss.jandex.Type;
 
 /**
  * @author Steve Ebersole
@@ -82,6 +84,47 @@ public int getModifiers() {
 		return methodInfo.flags();
 	}
 
+	private Method underlyingMethod;
+
+	@Override
+	public Method toJavaMember() {
+		if ( underlyingMethod == null ) {
+			underlyingMethod = resolveJavaMember();
+		}
+		return underlyingMethod;
+	}
+
+	private Method resolveJavaMember() {
+		final Class<?> declaringTypeClass = declaringType.toJavaClass();
+		methods: for ( Method method : declaringTypeClass.getDeclaredMethods() ) {
+			if ( !method.getName().equals( methodInfo.name() ) ) {
+				continue;
+			}
+
+			if ( method.getParameterCount() != methodInfo.parametersCount() ) {
+				continue;
+			}
+
+			for ( int i = 0; i < method.getParameterTypes().length; i++ ) {
+				final Class<?> methodParameterType = method.getParameterTypes()[i];
+				final Type expectedType = methodInfo.parameterType( i );
+				if ( !methodParameterType.getName().equals( expectedType.name().toString() ) ) {
+					continue methods;
+				}
+			}
+
+			// if we get here, we've found it
+			return method;
+		}
+
+		throw new RuntimeException(
+				String.format(
+						"Jandex FieldInfo had no corresponding Field : %s.%s",
+						declaringType.getName(),
+						methodInfo.name()
+				)
+		);	}
+
 	@Override
 	public ClassDetails getReturnType() {
 		return returnType;

src/main/java/org/hibernate/models/internal/jandex/JandexRecordComponentDetails.java

@@ -6,6 +6,8 @@
  */
 package org.hibernate.models.internal.jandex;
 
+import java.lang.reflect.Member;
+
 import org.hibernate.models.internal.MutableMemberDetails;
 import org.hibernate.models.spi.ClassDetails;
 import org.hibernate.models.spi.RecordComponentDetails;
@@ -57,6 +59,12 @@ public int getModifiers() {
 		return recordComponentInfo.accessor().flags();
 	}
 
+	@Override
+	public Member toJavaMember() {
+		// we could maybe resolve the corresponding method...
+		return null;
+	}
+
 	@Override
 	public String toString() {
 		return "JandexFieldDetails(" + getName() + ")";

src/main/java/org/hibernate/models/internal/jdk/JdkFieldDetails.java

@@ -7,6 +7,7 @@
 package org.hibernate.models.internal.jdk;
 
 import java.lang.reflect.Field;
+import java.lang.reflect.Member;
 
 import org.hibernate.models.internal.MutableMemberDetails;
 import org.hibernate.models.spi.ClassDetails;
@@ -47,6 +48,11 @@ public ClassDetails getDeclaringType() {
 		return declaringType;
 	}
 
+	@Override
+	public Field toJavaMember() {
+		return field;
+	}
+
 	@Override
 	public int getModifiers() {
 		return field.getModifiers();

src/main/java/org/hibernate/models/internal/jdk/JdkMethodDetails.java

@@ -6,6 +6,7 @@
  */
 package org.hibernate.models.internal.jdk;
 
+import java.lang.reflect.Member;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
@@ -75,6 +76,11 @@ public ClassDetails getDeclaringType() {
 		return declaringType;
 	}
 
+	@Override
+	public Method toJavaMember() {
+		return method;
+	}
+
 	@Override
 	public int getModifiers() {
 		return method.getModifiers();

src/main/java/org/hibernate/models/internal/jdk/JdkRecordComponentDetails.java

@@ -7,6 +7,7 @@
 
 package org.hibernate.models.internal.jdk;
 
+import java.lang.reflect.Member;
 import java.lang.reflect.RecordComponent;
 
 import org.hibernate.models.internal.MutableMemberDetails;
@@ -50,6 +51,12 @@ public ClassDetails getDeclaringType() {
 		return declaringType;
 	}
 
+	@Override
+	public Member toJavaMember() {
+		// we could maybe resolve the corresponding method...
+		return null;
+	}
+
 	@Override
 	public int getModifiers() {
 		return recordComponent.getAccessor().getModifiers();

src/main/java/org/hibernate/models/spi/MemberDetails.java

@@ -113,6 +113,15 @@ default boolean isField() {
 	 */
 	String resolveAttributeName();
 
+	/**
+	 * Access to the underlying {@linkplain Member}.  May return {@code null}.  May throw an exception.
+	 *
+	 * @return The underlying member, or {@code null} if there is no underlying member.
+	 *
+	 * @throws RuntimeException If there is expected to be a member, but it cannot be located.
+	 */
+	Member toJavaMember();
+
 	enum Visibility {
 		PUBLIC,
 		PROTECTED,