detect array initializer type based on short variable array notation (IDEA-147881)

java/java-psi-api/src/com/intellij/psi/util/PsiTypesUtil.java

@@ -218,6 +218,12 @@ public class PsiTypesUtil {
           return ((PsiArrayType)type).getComponentType();
         }
       }
+      else if (gParent instanceof PsiVariable) {
+        final PsiType type = ((PsiVariable)gParent).getType();
+        if (type instanceof PsiArrayType) {
+          return ((PsiArrayType)type).getComponentType();
+        }
+      }
       else if (gParent instanceof PsiArrayInitializerExpression) {
         final PsiType expectedTypeByParent = getExpectedTypeByParent((PsiExpression)parent);
         return expectedTypeByParent != null && expectedTypeByParent instanceof PsiArrayType

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting8/ExpectedTypeBasedOnArrayCreationWithoutExplicitType.java

@@ -0,0 +1,6 @@
+class Test {
+  {
+    Object x = null;
+    Object[] objs =  {x == null ? "N/A" : x};
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/GenericsHighlighting8Test.java

@@ -877,4 +877,8 @@ public class GenericsHighlighting8Test extends LightDaemonAnalyzerTestCase {
   public void testUncheckedWarningsWhenInferredTypeLeadsToRawRoGenericAssignment() throws Exception {
     doTest(true);
   }
+
+  public void testExpectedTypeBasedOnArrayCreationWithoutExplicitType() throws Exception {
+    doTest();
+  }
 }