ignore abstract non-serializable classes with "serializable methods" in editor; check if there are non-abstract serializable subclasses in batch mode (IDEA-74261 )

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting/SerializableStuff.java

@@ -75,3 +75,15 @@ class <warning descr="Externalizable class should have public no-args constructo
     public void writeExternal(ObjectOutput out) throws IOException {
     }
 }
+
+abstract class abstractNoSerializable {
+  protected Object readResolve() throws ObjectStreamException {
+    return null;
+  }
+}
+
+class serializableSubclassOfAbstractNoSerializable extends abstractNoSerializable implements Serializable {
+  public static void main(String[] args) {
+    System.out.println(new serializableSubclassOfAbstractNoSerializable().toString());
+  }
+}

java/java-tests/testData/inspection/deadCode/abstractClassWithSerializableSubclasses/expected.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems>  
+</problems>
+

java/java-tests/testData/inspection/deadCode/abstractClassWithSerializableSubclasses/src/Test.java

@@ -0,0 +1,13 @@
+import java.io.*;
+
+public abstract class A {
+  protected Object readResolve() throws ObjectStreamException {
+    return null;
+  }
+}
+
+class AImpl extends A implements Serializable {
+  public static void main(String[] args) {
+    System.out.println(new AImpl().toString());
+  }
+}