获取依赖moduleList后先判断是否存在，再执行ModuleList里面的Default Rule

gjjs-bd-runtime/src/main/java/com/brilliance/mda/runtime/mda/driver/DCR.java

@@ -314,31 +314,33 @@ public class DCR {
         //3.如果依赖moduleList，执行ModuleList里面的Default Rule
         //3.1查找该ModuleList的Emitter
         ModuleList moduleList = (ModuleList)MdaDriver.getBaseObject(null,path);
-        AbstractScopeEmitter emitterOfModuleList = getModuleListEmitter(moduleList.getDataClass());
-        if(emitter == null){
-            keyStack.pop();
-            return;
-        }
-        //3.2深入执行该ModuleList每一项的default rule
-        Map<String,Map<String,Object>> subMergeQueue = (Map<String,Map<String,Object>>)flagOrDps;
-        subMergeQueue.entrySet().forEach(entry->{
-            String idxStr = entry.getKey();
-            int num = Integer.parseInt(idxStr);
-            if(num <= 0){
-                return;
-            }
-            if(moduleList.size() <= 0){
-                return;
-            }
-            if (moduleList == null || moduleList.isEmpty()){
+        if(!MdaUtils.isEmpty(moduleList)) {
+            AbstractScopeEmitter emitterOfModuleList = getModuleListEmitter(moduleList.getDataClass());
+            if (emitter == null) {
+                keyStack.pop();
                 return;
             }
-            IModule subRootModule = moduleList.getElement(num);
-            //3.3设置上下文，以当前数据项为root点，执行Default
-            emitterOfModuleList.acceptContext(subRootModule);
-            executeMergedQueue(subRootModule,emitterOfModuleList,rootMergeMap,entry.getValue(),keyStack);
-            emitterOfModuleList.removeContext();
-        });
+            //3.2深入执行该ModuleList每一项的default rule
+            Map<String, Map<String, Object>> subMergeQueue = (Map<String, Map<String, Object>>) flagOrDps;
+            subMergeQueue.entrySet().forEach(entry -> {
+                String idxStr = entry.getKey();
+                int num = Integer.parseInt(idxStr);
+                if (num <= 0) {
+                    return;
+                }
+                if (moduleList.size() <= 0) {
+                    return;
+                }
+                if (moduleList == null || moduleList.isEmpty()) {
+                    return;
+                }
+                IModule subRootModule = moduleList.getElement(num);
+                //3.3设置上下文，以当前数据项为root点，执行Default
+                emitterOfModuleList.acceptContext(subRootModule);
+                executeMergedQueue(subRootModule, emitterOfModuleList, rootMergeMap, entry.getValue(), keyStack);
+                emitterOfModuleList.removeContext();
+            });
+        }
         //执行一下自己
         //emitter.executeDefault(path);
         keyStack.pop();