Cherry pick branch 'genexuslabs:CallAgentWithChatHistory' into beta

Author: iroqueta

common/src/main/java/com/genexus/GXExternalCollection.java

@@ -120,12 +120,14 @@ public <E> ArrayList<E> getExternalInstance() {
 	public void setExternalInstance(ArrayList<?> data)
 	{
 		try {
-			clear();
-			for (Object item : data) {
-				T obj = elementsType.getConstructor(new Class[]{}).newInstance();
-				obj.getClass().getMethod("setExternalInstance", item.getClass()).invoke(obj, item);
-				super.add(obj);
-				vectorExternal.add(item);
+			if (elementsType != null) {
+				clear();
+				for (Object item : data) {
+					T obj = elementsType.getConstructor(new Class[]{}).newInstance();
+					obj.getClass().getMethod("setExternalInstance", item.getClass()).invoke(obj, item);
+					super.add(obj);
+					vectorExternal.add(item);
+				}
 			}
 		}
 		catch(Exception ex)

java/src/main/java/com/genexus/util/saia/OpenAIResponse.java

@@ -103,7 +103,12 @@ public static class Message {
 		public void setRole(String role) { this.role = role; }
 
 		@JsonIgnore
-		public String getStringContent() { return ((StringContent) content).getValue(); }
+		public String getStringContent() {
+			if (content != null)
+				return ((StringContent) content).getValue();
+
+			return null;
+		}
 		@JsonIgnore
 		public StructuredContent getStructuredContent() {return (StructuredContent)content;}
 		public Content getContent() { return content; }