[core] Add SimpleEnumDefinitionProvider

vertigo-core/src/main/java/io/vertigo/core/node/definition/SimpleEnumDefinitionProvider.java

@@ -0,0 +1,37 @@
+package io.vertigo.core.node.definition;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Provides a list of definitions through an enum.
+ *
+ * @author skerdudou
+ */
+public interface SimpleEnumDefinitionProvider<D extends Definition> extends DefinitionProvider {
+
+	/**
+	 * Return a list of definitions with a set of already known definitions
+	 *
+	 * @param definitionSpace the actual definitionSpace
+	 * @return the list of new definition to register
+	 */
+	@Override
+	default List<DefinitionSupplier> get(final DefinitionSpace definitionSpace) {
+		final var enumValues = getEnumClass().getEnumConstants();
+
+		return Arrays.stream(enumValues)
+				.map(v -> (DefinitionSupplier) v::buildDefinition)
+				.toList();
+	}
+
+	Class<? extends EnumDefinition<D, ? extends Enum<?>>> getEnumClass();
+
+	static interface EnumDefinition<D, T extends Enum<T>> {
+
+		D buildDefinition(DefinitionSpace definitionSpace);
+
+		D get();
+
+	}
+}