make script params work with graaljs

engine-core/src/main/java/io/nosqlbench/engine/core/script/ScriptParams.java

@@ -21,32 +21,48 @@ import ch.qos.logback.classic.Logger;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import io.nosqlbench.nb.api.errors.BasicError;
+import org.graalvm.polyglot.Value;
+import org.graalvm.polyglot.proxy.Proxy;
+import org.graalvm.polyglot.proxy.ProxyObject;
 import org.slf4j.LoggerFactory;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.Flow;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 
 /**
  * Wrap the script parameters in a type which allows for easy manipulation
  */
-public class ScriptParams extends HashMap<String, String> {
+public class ScriptParams extends HashMap<String, String> implements ProxyObject {
 
     private static final Logger logger = (Logger) LoggerFactory.getLogger(ScriptParams.class);
     private static final Gson gson = new GsonBuilder().setPrettyPrinting().create();
 
-    public Map<String,String> withOverrides(Map<String, String> overrides) {
+    public ScriptParams withOverrides(Object overrides) {
+        Map<String, String> map;
+        if (overrides instanceof Map) {
+            map = (Map) overrides;
+        } else if (overrides instanceof Value) {
+            Value v = (Value) overrides;
+            map = v.as(Map.class);
+        } else {
+            throw new RuntimeException("Unrecognized overrides type: " + overrides.getClass().getCanonicalName());
+        }
+
         if (overrides == null) {
             logger.warn("A null map was provided to withOverrides. This could be a bug in your script.");
             overrides = Map.of();
         }
         checkForNulls("params", "calling withOverrides", this);
-        checkForNulls("overrides", "calling withOverrides", overrides);
+        checkForNulls("overrides", "calling withOverrides", map);
         ScriptParams result = new ScriptParams();
         result.putAll(this);
 
-        for (Entry<String, String> overrideEntry : overrides.entrySet()) {
+        for (Entry<String, String> overrideEntry : map.entrySet()) {
             String oKey = overrideEntry.getKey();
             String oVal = overrideEntry.getValue();
             if (oVal.toUpperCase().endsWith("UNDEF")) {
@@ -59,20 +75,32 @@ public class ScriptParams extends HashMap<String, String> {
                 logger.trace("Overrode key '" + oKey + "': from '" + was + " to " + oVal);
             }
         }
-        return result;
+        ScriptParams p = new ScriptParams();
+        p.putAll(result);
+        return p;
     }
 
-    public Map<String,String> withDefaults(Map<String, String> defaults) {
+    public ScriptParams withDefaults(Object defaults) {
-        if (defaults == null) {
+        Map<String, String> map;
+        if (defaults instanceof Map) {
+            map = (Map) defaults;
+        } else if (defaults instanceof Value) {
+            map = ((Value) defaults).as(Map.class);
+        } else {
+            throw new RuntimeException("Unrecognized type for defaults: " + defaults.getClass().getCanonicalName());
+        }
+        if (map == null) {
             logger.warn("A null map was provided to withDefaults. This could be a bug in your script.");
-            defaults=Map.of();
+            map = Map.of();
         }
         ScriptParams result = new ScriptParams();
         checkForNulls("params", "calling withDefaults", this);
-        checkForNulls("defaults", "calling withDefaults", defaults);
+        checkForNulls("defaults", "calling withDefaults", map);
-        result.putAll(defaults);
+        result.putAll(map);
         result.putAll(this);
-        return result;
+        ScriptParams p = new ScriptParams();
+        p.putAll(result);
+        return p;
     }
 
     private static void checkForNulls(String name, String action, Map<String, String> map) {
@@ -110,4 +138,50 @@ public class ScriptParams extends HashMap<String, String> {
         return String.valueOf(o);
     }
 
+    //region ProxyObject methods
+
+    @Override
+    public Object getMember(String key) {
+        if (key.equals("withDefaults")) {
+            return (Function<Object, Object>) this::withDefaults;
+        }
+        if (key.equals("withOverrides")) {
+            return (Function<Object, Object>) this::withOverrides;
+        }
+        return super.get(key);
+    }
+
+    @Override
+    public boolean containsKey(Object key) {
+        return
+                key.equals("withOverrides")
+                        || key.equals("withDefaults")
+                        || super.containsKey(key);
+    }
+
+    @Override
+    public Object getMemberKeys() {
+        ArrayList<String> memberKeys = new ArrayList<>(super.keySet());
+        memberKeys.add("withDefaults");
+        memberKeys.add("withOverride");
+        return memberKeys;
+    }
+
+    @Override
+    public boolean hasMember(String key) {
+        if (super.containsKey(key)) {
+            return true;
+        }
+        if (key.equals("withOverrides") || key.equals("withDefaults")) {
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void putMember(String key, Value value) {
+        super.put(key, value.asString());
+    }
+    //endregion
+
 }