Move JavaModuleInfo and JavaModuleGraph to frontend.java

2017-05-24 15:42:15 +03:00
parent dde50a34db
commit a583a2f171
3 changed files with 6 additions and 6 deletions
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2010-2017 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.kotlin.resolve.jvm.modules
+
+import org.jetbrains.kotlin.storage.LockBasedStorageManager
+
+class JavaModuleGraph(getModuleInfo: (String) -> JavaModuleInfo) {
+    private val moduleInfo: (String) -> JavaModuleInfo = LockBasedStorageManager.NO_LOCKS.createMemoizedFunction(getModuleInfo)
+
+    fun getAllReachable(rootModules: List<String>): List<String> {
+        val visited = linkedSetOf<String>()
+
+        fun dfs(module: String) {
+            if (!visited.add(module)) return
+            for (dependency in moduleInfo(module).requires) {
+                if (dependency.isTransitive) {
+                    dfs(dependency.moduleName)
+                }
+            }
+        }
+
+        rootModules.forEach(::dfs)
+        return visited.toList()
+    }
+}
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2010-2017 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.kotlin.resolve.jvm.modules
+
+import com.intellij.openapi.vfs.VirtualFile
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.utils.compactIfPossible
+import org.jetbrains.org.objectweb.asm.ClassReader
+import org.jetbrains.org.objectweb.asm.ClassVisitor
+import org.jetbrains.org.objectweb.asm.ModuleVisitor
+import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.Opcodes.ACC_TRANSITIVE
+import java.io.IOException
+
+class JavaModuleInfo(
+        val moduleName: String,
+        val requires: List<Requires>,
+        val exports: List<Exports>
+) {
+    data class Requires(val moduleName: String, val flags: Int) {
+        val isTransitive get() = (flags and ACC_TRANSITIVE) != 0
+    }
+
+    data class Exports(val packageFqName: FqName, val flags: Int, val toModules: List<String>)
+
+    override fun toString(): String =
+            "Module $moduleName (${requires.size} requires, ${exports.size} exports)"
+
+    companion object {
+        fun read(file: VirtualFile): JavaModuleInfo? {
+            val contents = try { file.contentsToByteArray() } catch (e: IOException) { return null }
+
+            var moduleName: String? = null
+            val requires = arrayListOf<Requires>()
+            val exports = arrayListOf<Exports>()
+
+            ClassReader(contents).accept(object : ClassVisitor(Opcodes.ASM6) {
+                override fun visitModule(name: String, access: Int, version: String?): ModuleVisitor {
+                    moduleName = name
+
+                    return object : ModuleVisitor(Opcodes.ASM6) {
+                        override fun visitRequire(module: String, access: Int, version: String?) {
+                            requires.add(Requires(module, access))
+                        }
+
+                        override fun visitExport(packageFqName: String, access: Int, modules: Array<String>?) {
+                            exports.add(Exports(FqName(packageFqName), access, modules?.toList().orEmpty()))
+                        }
+                    }
+                }
+            }, ClassReader.SKIP_DEBUG or ClassReader.SKIP_CODE or ClassReader.SKIP_FRAMES)
+
+            return if (moduleName != null)
+                JavaModuleInfo(moduleName!!, requires.compactIfPossible(), exports.compactIfPossible())
+            else null
+        }
+    }
+}