From 691068c0c25318a28b3bdd6637f06f2066265fbc Mon Sep 17 00:00:00 2001
From: "Pavel V. Talanov" <talanov.pavel@gmail.com>
Date: Mon, 29 Sep 2014 16:39:56 +0400
Subject: [PATCH] Implement LibraryDependenciesCache

---
 .../intellij/openapi/roots/annotations.xml    |   6 +-
 .../resolve/LibraryDependenciesCache.kt       | 106 ++++++++++++++++++
 2 files changed, 111 insertions(+), 1 deletion(-)
 create mode 100644 idea/idea-analysis/src/org/jetbrains/jet/plugin/caches/resolve/LibraryDependenciesCache.kt

diff --git a/annotations/com/intellij/openapi/roots/annotations.xml b/annotations/com/intellij/openapi/roots/annotations.xml
index f0bdec252df..5308bd0edbe 100644
--- a/annotations/com/intellij/openapi/roots/annotations.xml
+++ b/annotations/com/intellij/openapi/roots/annotations.xml
@@ -22,7 +22,11 @@
     <item name='com.intellij.openapi.roots.OrderEnumerator com.intellij.openapi.roots.OrderEnumerator recursively()'>
     <annotation name='org.jetbrains.annotations.NotNull'/>
   </item>
-  <item
+    <item
+        name='com.intellij.openapi.roots.OrderEnumerator com.intellij.openapi.roots.OrderEnumerator satisfying(com.intellij.openapi.util.Condition&lt;com.intellij.openapi.roots.OrderEntry&gt;)'>
+        <annotation name='org.jetbrains.annotations.NotNull'/>
+    </item>
+    <item
       name='com.intellij.openapi.roots.ProjectFileIndex.SERVICE com.intellij.openapi.roots.ProjectFileIndex getInstance(com.intellij.openapi.project.Project)'>
     <annotation name='org.jetbrains.annotations.NotNull'/>
   </item>
diff --git a/idea/idea-analysis/src/org/jetbrains/jet/plugin/caches/resolve/LibraryDependenciesCache.kt b/idea/idea-analysis/src/org/jetbrains/jet/plugin/caches/resolve/LibraryDependenciesCache.kt
new file mode 100644
index 00000000000..6037282135e
--- /dev/null
+++ b/idea/idea-analysis/src/org/jetbrains/jet/plugin/caches/resolve/LibraryDependenciesCache.kt
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.caches.resolve
+
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.roots.libraries.Library
+import com.intellij.util.containers.MultiMap
+import com.intellij.psi.util.CachedValuesManager
+import com.intellij.psi.util.CachedValueProvider
+import com.intellij.openapi.roots.ProjectRootModificationTracker
+import com.intellij.openapi.module.ModuleManager
+import com.intellij.openapi.roots.ModuleRootManager
+import com.intellij.openapi.roots.LibraryOrderEntry
+import com.intellij.openapi.roots.OrderEntry
+import com.intellij.openapi.roots.ModuleOrderEntry
+import com.intellij.openapi.util.Condition
+import java.util.LinkedHashSet
+import com.intellij.openapi.roots.RootPolicy
+import org.jetbrains.jet.utils.addIfNotNull
+import com.intellij.openapi.projectRoots.Sdk
+import com.intellij.openapi.roots.JdkOrderEntry
+import com.intellij.openapi.roots.ModuleSourceOrderEntry
+
+public class LibraryDependenciesCache(private val project: Project) {
+
+    //NOTE: used LibraryRuntimeClasspathScope as reference
+    public fun getLibrariesAndSdksUsedWith(library: Library): Pair<List<Library>, List<Sdk>> {
+        val processedModules = LinkedHashSet<Module>()
+        val condition = Condition<OrderEntry>() { orderEntry ->
+            if (orderEntry is ModuleOrderEntry) {
+                val module = orderEntry.getModule()
+                module != null && module !in processedModules
+            }
+            else {
+                true
+            }
+        }
+
+        val libraries = LinkedHashSet<Library>()
+        val sdks = LinkedHashSet<Sdk>()
+
+        fun collectLibrariesAndSdksAcrossDependencies(module: Module) {
+            if (!processedModules.add(module)) return
+
+            ModuleRootManager.getInstance(module).orderEntries().recursively().satisfying(condition).process(object : RootPolicy<Unit>() {
+                override fun visitModuleSourceOrderEntry(moduleSourceOrderEntry: ModuleSourceOrderEntry?, value: Unit?): Unit? {
+                    processedModules.addIfNotNull(moduleSourceOrderEntry?.getOwnerModule())
+                    return Unit
+                }
+
+                public override fun visitLibraryOrderEntry(libraryOrderEntry: LibraryOrderEntry?, value: Unit?): Unit? {
+                    libraries.addIfNotNull(libraryOrderEntry?.getLibrary())
+                    return Unit
+                }
+
+                override fun visitJdkOrderEntry(jdkOrderEntry: JdkOrderEntry?, value: Unit?): Unit? {
+                    sdks.addIfNotNull(jdkOrderEntry?.getJdk())
+                    return Unit
+                }
+            }, Unit)
+        }
+
+        getLibraryUsageIndex().modulesLibraryIsUsedIn[library].forEach { module -> collectLibrariesAndSdksAcrossDependencies(module) }
+
+        return Pair(libraries.toList(), sdks.toList())
+    }
+
+    public fun getLibraryUsageIndex(): LibraryUsageIndex {
+        return CachedValuesManager.getManager(project).getCachedValue(project) {
+            CachedValueProvider.Result(LibraryUsageIndex(), ProjectRootModificationTracker.getInstance(project))
+        }!!
+    }
+
+    private inner class LibraryUsageIndex {
+        val modulesLibraryIsUsedIn: MultiMap<Library, Module> = MultiMap.createSet();
+        {
+            ModuleManager.getInstance(project).getModules().forEach {
+                module ->
+                ModuleRootManager.getInstance(module).getOrderEntries().forEach {
+                    entry ->
+                    if (entry is LibraryOrderEntry) {
+                        val library = entry.getLibrary()
+                        if (library != null) {
+                            modulesLibraryIsUsedIn.putValue(library, module)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file