clearBindingCache for MPS (hot swap friendly)

platform/configuration-store-impl/testSrc/xml/XmlSerializerTest.kt

@@ -4,9 +4,11 @@
 package com.intellij.configurationStore.xml
 
 import com.intellij.configurationStore.StoredPropertyStateTest
+import com.intellij.configurationStore.clearBindingCache
 import com.intellij.configurationStore.deserialize
 import com.intellij.configurationStore.serialize
 import com.intellij.openapi.util.text.StringUtil
+import com.intellij.testFramework.UsefulTestCase
 import com.intellij.testFramework.assertConcurrent
 import com.intellij.testFramework.assertions.Assertions.assertThat
 import com.intellij.util.loadElement
@@ -15,6 +17,7 @@ import com.intellij.util.xmlb.annotations.*
 import junit.framework.TestCase
 import org.intellij.lang.annotations.Language
 import org.jdom.Element
+import org.junit.Assume.assumeTrue
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.junit.runners.Suite
@@ -52,6 +55,12 @@ internal class XmlSerializerTest {
     </Bean>""", data)
   }
 
+  @Test
+  fun testClearBindingCache() {
+    assumeTrue(!UsefulTestCase.IS_UNDER_TEAMCITY)
+    clearBindingCache()
+  }
+
   @Test fun emptyBeanSerialization() {
     class EmptyBean
 

platform/projectModel-api/src/com/intellij/configurationStore/xmlSerializer.kt

@@ -1,6 +1,4 @@
-/*
- * Copyright 2000-2017 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 2000-2018 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.
 @file:JvmName("XmlSerializer")
 package com.intellij.configurationStore
 
@@ -179,6 +177,19 @@ private val serializer = object : XmlSerializerImpl.XmlSerializerBase() {
       binding
     }
   }
+
+  fun clearBindingCache() {
+    cacheLock.write {
+      _bindingCache?.clear()
+    }
+  }
+}
+
+/**
+ * used by MPS. Do not use if not approved.
+ */
+fun clearBindingCache() {
+  serializer.clearBindingCache()
 }
 
 private data class BindingCacheKey(val type: Type, val accessor: MutableAccessor?)