IJPL-207563 Remove PersistentStateComponent from ProjectRootManagerImpl

GitOrigin-RevId: c2fd14ed07ae5e9d397ebbc5c7c277a632026a92

platform/configuration-store-impl/src/ComponentStoreImpl.kt

@@ -456,10 +456,7 @@ abstract class ComponentStoreImpl : IComponentStore {
         if (modificationCountChanged && state != null && isReportStatisticAllowed(stateSpec, storageSpec)) {
           featureUsageSettingManager.logConfigurationChanged(effectiveComponentName, state)
         }
-
-        if (state !== HandledByWSM) {
-          setStateToSaveSessionProducer(state, info, effectiveComponentName, sessionProducer)
-        } // else: WSM will call setStateToSaveSessionProducer by itself
+        setStateToSaveSessionProducer(state, info, effectiveComponentName, sessionProducer)
       }
     }
   }

platform/configuration-store-impl/src/XmlElementStorage.kt

@@ -461,7 +461,7 @@ private class StateGetterImpl<S : Any>(
       null
     }
 
-    val serializedStateAfterLoad = if (stateAfterLoad == null || stateAfterLoad == HandledByWSM) {
+    val serializedStateAfterLoad = if (stateAfterLoad == null) {
       serializedState
     }
     else {

platform/lang-impl/api-dump-unreviewed.txt

@@ -17057,7 +17057,6 @@ f:com.intellij.webcore.packaging.PackagingErrorDialog
 - <init>(java.lang.String,com.intellij.webcore.packaging.PackageManagementService$ErrorDescription):V
 f:com.intellij.workspaceModel.ide.impl.legacyBridge.project.ProjectRootManagerBridge
 - com.intellij.openapi.Disposable
-- com.intellij.openapi.components.PersistentStateComponent
 - com.intellij.openapi.roots.ex.ProjectRootManagerEx
 - <init>(com.intellij.openapi.project.Project,kotlinx.coroutines.CoroutineScope):V
 f:com.intellij.workspaceModel.ide.impl.legacyBridge.project.ProjectRootManagerBridge$ModuleDependencyListenerImpl

platform/projectModel-api/src/com/intellij/openapi/components/migration_helpers.kt

@@ -1,16 +0,0 @@
-// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
-package com.intellij.openapi.components
-
-import org.jdom.Element
-import org.jetbrains.annotations.ApiStatus
-
-
-/**
- * Marker object to ease migration from the [PersistentStateComponent] to the WSM. Persistent state component may return [HandledByWSM] from
- * its [PersistentStateComponent.getState] implementation as an indication that state exists, but is handled externally (by the WSM).
- *
- * The main use case is the following: depending on a registry flag, a component may handle its state by itself (and then return the actual
- * state) or delegate state handling to the WSM, and then return this object to make sure that the state set by the WSM is not overwritten.
- **/
-@ApiStatus.Internal
-public val HandledByWSM: Element = Element("__HandledByWSM__")

platform/projectModel-impl/src/com/intellij/openapi/roots/impl/ProjectRootManagerImpl.kt

@@ -2,8 +2,6 @@
 package com.intellij.openapi.roots.impl
 
 import com.intellij.openapi.application.ApplicationManager
-import com.intellij.openapi.components.HandledByWSM
-import com.intellij.openapi.components.PersistentStateComponent
 import com.intellij.openapi.components.State
 import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.extensions.ProjectExtensionPointName
@@ -31,7 +29,6 @@ import com.intellij.workspaceModel.ide.WsmProjectSettingsEntityUtils
 import com.intellij.workspaceModel.ide.WsmSingletonEntityUtils
 import com.intellij.workspaceModel.ide.impl.legacyBridge.module.roots.ModuleRootComponentBridge
 import kotlinx.coroutines.CoroutineScope
-import org.jdom.Element
 import org.jetbrains.annotations.ApiStatus
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 import java.util.concurrent.ConcurrentHashMap
@@ -45,7 +42,7 @@ private val EP_NAME = ProjectExtensionPointName<ProjectExtension>("com.intellij.
 open class ProjectRootManagerImpl(
   @JvmField val project: Project,
   @JvmField protected val coroutineScope: CoroutineScope,
-) : ProjectRootManagerEx(), PersistentStateComponent<Element> {
+) : ProjectRootManagerEx() {
 
   private val projectJdkEventDispatcher = EventDispatcher.create(ProjectJdkListener::class.java)
   private val moduleRootManagerInstances = ConcurrentHashMap<Module, ModuleRootManager>()
@@ -421,15 +418,6 @@ open class ProjectRootManagerImpl(
     return moduleRootManagerInstances.computeIfAbsent(module) { ModuleRootComponentBridge(module) }
   }
 
-  @ApiStatus.Internal
-  override fun loadState(element: Element) {
-  }
-
-  @ApiStatus.Internal
-  override fun getState(): Element? {
-    return HandledByWSM
-  }
-
   @ApiStatus.Internal
   var isFiringEvent: Boolean = false
     protected set