HollowAPIGenerator: preventing calls to build() prior to adequate spe…

…cification of parameters
Netflix · May 22, 2017 · 92714e7 · 92714e7
1 parent 2d9a131
commit 92714e7
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/hollow/src/main/java/com/netflix/hollow/api/codegen/HollowAPIGenerator.java b/hollow/src/main/java/com/netflix/hollow/api/codegen/HollowAPIGenerator.java
@@ -233,6 +233,13 @@ public Builder withGetterPrefix(String getterPrefix) {
         }
 
         public HollowAPIGenerator build() {
+            if(apiClassname == null)
+                throw new IllegalStateException("Please specify an API classname (.withAPIClassname()) before calling .build()");
+            if(packageName == null)
+                throw new IllegalStateException("Please specify a package name (.withPackageName()) before calling .build()");
+            if(dataset == null)
+                throw new IllegalStateException("Please specify a data model (.withDataModel()) before calling .build()");
+
             HollowAPIGenerator generator = new HollowAPIGenerator(apiClassname, packageName, dataset, parameterizedTypes, parameterizeAllClassnames);
             generator.setClassPostfix(classPostfix);
             generator.setGetterPrefix(getterPrefix);