Fix complex (non-scalar) input collections in Java

Author: leonardehrenfried

packages/plugins/java/java/src/visitor.ts

@@ -237,7 +237,15 @@ export class JavaResolversVisitor extends BaseVisitor<
           }
           return indentMultiline(
             `if (args.get("${arg.name.value}") != null) {
-		this.${arg.name.value} = (${this.config.listType}<${typeToUse.baseType}>) args.get("${arg.name.value}");
+  this.${arg.name.value} = new ArrayList<${typeToUse.baseType}>();
+  for (var o : (${this.config.listType}) args.get("${arg.name.value}")) {
+    if (o != null) {
+      this.${arg.name.value}.add(new ${typeToUse.baseType}(o));
+    }
+    else {
+      this.${arg.name.value}.add(null);
+    }
+  }
 }`,
             3,
           );

packages/plugins/java/java/tests/java.spec.ts

@@ -158,7 +158,15 @@ describe('Java', () => {
           if (args != null) {
             this.f = (Iterable<String>) args.get("f");
             if (args.get("g") != null) {
-              this.g = (Iterable<SearchUserInput>) args.get("g");
+              this.g = new ArrayList<SearchUserInput>();
+              for (var o : (Iterable) args.get("g")) {
+                if (o != null) {
+                  this.g.add(new SearchUserInput(o));
+                }
+                else {
+                  this.g.add(null);
+                }
+              }
             }
           }
         }