java completion: enable package suggestions inside type arguments (IDEA-193049)

java/java-impl/src/com/intellij/codeInsight/completion/JavaCompletionContributor.java

@@ -116,7 +116,8 @@ public class JavaCompletionContributor extends CompletionContributor {
 
     if (JavaKeywordCompletion.isDeclarationStart(position) ||
         JavaKeywordCompletion.isInsideParameterList(position) ||
-        isInsideAnnotationName(position)) {
+        isInsideAnnotationName(position) ||
+        psiElement().inside(PsiReferenceParameterList.class).accepts(position)) {
       return new OrFilter(ElementClassFilter.CLASS, ElementClassFilter.PACKAGE);
     }
 
@@ -143,10 +144,6 @@ public class JavaCompletionContributor extends CompletionContributor {
       return ElementClassFilter.CLASS;
     }
 
-    if (psiElement().inside(PsiReferenceParameterList.class).accepts(position)) {
-      return ElementClassFilter.CLASS;
-    }
-
     if (psiElement().inside(PsiAnnotationParameterList.class).accepts(position)) {
       return createAnnotationFilter(position);
     }

java/java-tests/testData/codeInsight/completion/normal/PackageInMemberTypeGeneric.java

@@ -0,0 +1,3 @@
+class Foo {
+  List<java.la<caret>> foo() {}
+}

java/java-tests/testData/codeInsight/completion/normal/PackageInMemberTypeGeneric_after.java

@@ -0,0 +1,3 @@
+class Foo {
+  List<java.lang.<caret>> foo() {}
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/completion/NormalCompletionTest.groovy

@@ -1351,6 +1351,7 @@ class XInternalError {}
   void testNoClosingWhenChoosingWithParenBeforeIdentifier() { doTest '(' }
 
   void testPackageInMemberType() { doTest() }
+  void testPackageInMemberTypeGeneric() { doTest() }
 
   void testConstantInAnno() { doTest('\n') }