speedup toString search

GitOrigin-RevId: fa27d74a28cce199d521669e17fd893c7eb96cab

java/debugger/impl/src/com/intellij/debugger/impl/DebuggerUtilsEx.java

@@ -1084,4 +1084,18 @@ public abstract class DebuggerUtilsEx extends DebuggerUtils {
       }
     });
   }
+
+  @Nullable
+  public static Method concreteMethodByName(@NotNull ClassType type, String name, String signature)  {
+    //TODO: currently does not include interface default methods
+    while (type != null) {
+      for (Method candidate : type.methods()) {
+        if (candidate.name().equals(name) && candidate.signature().equals(signature) && !candidate.isAbstract()) {
+          return candidate;
+        }
+      }
+      type = type.superclass();
+    }
+    return null;
+  }
 }

java/debugger/impl/src/com/intellij/debugger/ui/tree/render/ToStringRenderer.java

@@ -1,4 +1,4 @@
-// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.ui.tree.render;
 
 import com.intellij.debugger.DebuggerBundle;
@@ -130,7 +130,7 @@ public class ToStringRenderer extends NodeRendererImpl implements OnDemandRender
   @SuppressWarnings({"HardCodedStringLiteral"})
   private static boolean overridesToString(Type type) {
     if (type instanceof ClassType) {
-      Method toStringMethod = ((ClassType)type).concreteMethodByName("toString", "()Ljava/lang/String;");
+      Method toStringMethod = DebuggerUtilsEx.concreteMethodByName((ClassType)type, "toString", "()Ljava/lang/String;");
       return toStringMethod != null && !CommonClassNames.JAVA_LANG_OBJECT.equals(toStringMethod.declaringType().name());
     }
     return false;