From 3a0186fef49113c340f6d42cf6e07d7798064cf6 Mon Sep 17 00:00:00 2001
From: Jonathan Shook <jshook@gmail.com>
Date: Tue, 21 Dec 2021 13:07:54 -0600
Subject: [PATCH] provide a default empty configuration

---
 .../nosqlbench/nb/api/config/standard/ConfigModel.java   | 9 +++++++++
 .../nb/api/config/standard/NBConfiguration.java          | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/ConfigModel.java b/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/ConfigModel.java
index b309d8391..bb319ed71 100644
--- a/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/ConfigModel.java
+++ b/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/ConfigModel.java
@@ -1,5 +1,6 @@
 package io.nosqlbench.nb.api.config.standard;
 
+import io.nosqlbench.engine.api.activityimpl.ActivityDef;
 import io.nosqlbench.nb.api.errors.BasicError;
 
 import java.math.BigDecimal;
@@ -27,6 +28,14 @@ public class ConfigModel implements NBConfigModel {
         return new ConfigModel(ofType);
     }
 
+    public static NBConfiguration defacto(ActivityDef def) {
+        ConfigModel configModel = new ConfigModel(Object.class);
+        for (Map.Entry<String, Object> entry : def.getParams().entrySet()) {
+            configModel.add(Param.defaultTo(entry.getKey(),entry.getValue().toString()));
+        }
+        return configModel.apply(def.getParams());
+    }
+
     public <T> ConfigModel add(Param<T> param) {
         this.params.add(param);
         for (String name : param.getNames()) {
diff --git a/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/NBConfiguration.java b/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/NBConfiguration.java
index 1ee9923dd..1abf48a91 100644
--- a/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/NBConfiguration.java
+++ b/nb-api/src/main/java/io/nosqlbench/nb/api/config/standard/NBConfiguration.java
@@ -25,6 +25,10 @@ public class NBConfiguration {
         this.model = model;
     }
 
+    public static NBConfiguration empty() {
+        return new NBConfiguration(ConfigModel.of(Object.class).asReadOnly(),new LinkedHashMap<>());
+    }
+
     /**
      * Returns the value of the named parameter as {@link #getOptional(String)}, so long
      * as no env vars were reference OR all env var references were found.