[ExternalSystem|Sync] new: add maven-like coordinate contribution for Gradle Java libraries

### Issues
  * IDEA-134885 Support substitution of library dependency with module dependency when the module is a part of another Maven or Gradle project

GitOrigin-RevId: de1f852b05bf80b15e9682dfd7338ffbb66a352a

platform/external-system-api/api-dump.txt

@@ -1014,6 +1014,7 @@ com.intellij.openapi.externalSystem.service.project.ExternalProjectRefreshCallba
 - onSuccess(com.intellij.openapi.externalSystem.model.task.ExternalSystemTaskId,com.intellij.openapi.externalSystem.model.DataNode):V
 com.intellij.openapi.externalSystem.service.project.ExternalSystemCoordinateContributor
 - sf:Companion:com.intellij.openapi.externalSystem.service.project.ExternalSystemCoordinateContributor$Companion
+- findLibraryCoordinate(com.intellij.openapi.roots.libraries.Library):com.intellij.openapi.externalSystem.model.project.ProjectCoordinate
 - findModuleCoordinate(com.intellij.openapi.module.Module):com.intellij.openapi.externalSystem.model.project.ProjectCoordinate
 f:com.intellij.openapi.externalSystem.service.project.ExternalSystemCoordinateContributor$Companion
 com.intellij.openapi.externalSystem.service.project.ExternalSystemProjectResolver

platform/external-system-api/src/com/intellij/openapi/externalSystem/service/project/ExternalSystemCoordinateContributor.kt

@@ -3,6 +3,7 @@ package com.intellij.openapi.externalSystem.service.project
 import com.intellij.openapi.extensions.ExtensionPointName
 import com.intellij.openapi.externalSystem.model.project.ProjectCoordinate
 import com.intellij.openapi.module.Module
+import com.intellij.openapi.roots.libraries.Library
 import org.jetbrains.annotations.ApiStatus
 
 /**
@@ -22,6 +23,16 @@ interface ExternalSystemCoordinateContributor {
     return null
   }
 
+  /**
+   * Finds maven-like artifact coordinates for external library that corresponding to the given library.
+   *
+   * @param library is a library to find artifact coordinates of a corresponding external library.
+   * @return found external artifact coordinates.
+   */
+  fun findLibraryCoordinate(library: Library): ProjectCoordinate? {
+    return null
+  }
+
   companion object {
 
     @ApiStatus.Internal

platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/project/ExternalProjectsWorkspace.kt

@@ -13,9 +13,7 @@ import org.jetbrains.annotations.ApiStatus
 @ApiStatus.Internal
 @Service(Service.Level.PROJECT)
 @State(name = "ExternalProjectsWorkspace", storages = [Storage(CACHE_FILE)])
-class ExternalProjectsWorkspace(
-  private val project: Project,
-) : SimplePersistentStateComponent<ExternalProjectsWorkspace.State>(State()) {
+class ExternalProjectsWorkspace : SimplePersistentStateComponent<ExternalProjectsWorkspace.State>(State()) {
 
   class State : BaseState() {
 
@@ -31,7 +29,7 @@ class ExternalProjectsWorkspace(
     if (!Registry.`is`("external.system.substitute.library.dependencies")) {
       return ModifiableWorkspaceModel.NOP
     }
-    return ModifiableWorkspaceModelImpl(project, state, modelProvider)
+    return ModifiableWorkspaceModelImpl(state, modelProvider)
   }
 
   companion object {

platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/project/ModifiableWorkspaceModelImpl.kt

@@ -1,11 +1,7 @@
 // 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.externalSystem.service.project
 
-import com.intellij.openapi.externalSystem.ExternalSystemManager
-import com.intellij.openapi.externalSystem.model.ProjectKeys
 import com.intellij.openapi.externalSystem.model.project.ProjectCoordinate
-import com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil
-import com.intellij.openapi.project.Project
 import com.intellij.openapi.roots.LibraryOrderEntry
 import com.intellij.openapi.roots.ModifiableRootModel
 import com.intellij.openapi.roots.ModuleOrderEntry
@@ -19,7 +15,6 @@ import java.util.*
 
 @ApiStatus.Internal
 class ModifiableWorkspaceModelImpl internal constructor(
-  private val project: Project,
   private val state: ExternalProjectsWorkspace.State,
   private val modelsProvider: IdeModifiableModelsProvider,
 ) : ModifiableWorkspaceModel {
@@ -61,16 +56,11 @@ class ModifiableWorkspaceModelImpl internal constructor(
 
   private fun buildLibraryToCoordinateMap(): Map<String, ProjectCoordinate> {
     val result = HashMap<String, ProjectCoordinate>()
-    val projectDataManager = ProjectDataManager.getInstance()
-    ExternalSystemManager.EP_NAME.forEachExtensionSafe { manager ->
-      val projectsData = projectDataManager.getExternalProjectsData(project, manager.systemId)
-      for (projectInfo in projectsData) {
-        val projectStructure = projectInfo.externalProjectStructure ?: continue
-        val libraryNodes = ExternalSystemApiUtil.findAll(projectStructure, ProjectKeys.LIBRARY)
-        for (libraryNode in libraryNodes) {
-          val libraryData = libraryNode.getData()
-          result.put(libraryData.internalName, libraryData)
-        }
+    ExternalSystemCoordinateContributor.EP_NAME.forEachExtensionSafe { contributor ->
+      for (library in modelsProvider.allLibraries) {
+        val libraryName = library.name ?: continue
+        val libraryCoordinate = contributor.findLibraryCoordinate(library) ?: continue
+        result.put(libraryName, libraryCoordinate)
       }
     }
     return result

plugins/gradle/java/src/service/project/JavaGradleCoordinateContributor.kt

@@ -0,0 +1,25 @@
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.plugins.gradle.service.project
+
+import com.intellij.java.library.MavenCoordinates
+import com.intellij.java.library.getMavenCoordinates
+import com.intellij.openapi.externalSystem.model.project.ProjectCoordinate
+import com.intellij.openapi.externalSystem.model.project.ProjectId
+import com.intellij.openapi.externalSystem.service.project.ExternalSystemCoordinateContributor
+import com.intellij.openapi.roots.libraries.Library
+import org.jetbrains.plugins.gradle.util.GradleConstants
+
+class JavaGradleCoordinateContributor: ExternalSystemCoordinateContributor {
+
+  override fun findLibraryCoordinate(library: Library): ProjectCoordinate? {
+    val librarySource = library.externalSource ?: return null
+    if (librarySource.id != GradleConstants.SYSTEM_ID.id) {
+      return null
+    }
+    return library.getMavenCoordinates()?.toProjectCoordinate()
+  }
+
+  private fun MavenCoordinates.toProjectCoordinate(): ProjectCoordinate {
+    return ProjectId(groupId, artifactId, version)
+  }
+}