From ead9cb2c77b8b06cb045d245d4197f6a1a507301 Mon Sep 17 00:00:00 2001
From: Igor Artamonov <igor@artamonov.ru>
Date: Thu, 5 Sep 2019 00:31:10 -0400
Subject: [PATCH] solution: debug utility to extract method from matcher

---
 .../io/emeraldpay/dshackle/upstream/Selector.kt | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/Selector.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/Selector.kt
index 76170fbe..3e7ebee0 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/Selector.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/Selector.kt
@@ -59,7 +59,18 @@ class Selector {
                 return matcher
             }
             if (matcher is MultiMatcher) {
-                return matcher.getLabelMatcher()
+                return matcher.getMatcher(LabelSelectorMatcher::class.java)
+            }
+            return null
+        }
+
+        @JvmStatic
+        fun extractMethod(matcher: Matcher): MethodMatcher? {
+            if (matcher is MethodMatcher) {
+                return matcher
+            }
+            if (matcher is MultiMatcher) {
+                return matcher.getMatcher(MethodMatcher::class.java)
             }
             return null
         }
@@ -94,8 +105,8 @@ class Selector {
             return matchers.all { it.matches(up) }
         }
 
-        fun getLabelMatcher(): LabelSelectorMatcher? {
-            return matchers.find { it is LabelSelectorMatcher } as LabelSelectorMatcher?
+        fun <T: Matcher> getMatcher(type: Class<T>): T? {
+            return matchers.find { type.isAssignableFrom(it.javaClass) } as T?
         }
     }