org.jetbrains.kotlin.load.kotlin.KotlinBinaryClassCache.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 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.load.kotlin
import com.intellij.ide.highlighter.JavaClassFileType
import com.intellij.openapi.Disposable
import com.intellij.openapi.application.ApplicationManager
import com.intellij.openapi.components.ServiceManager
import com.intellij.openapi.util.Computable
import com.intellij.openapi.vfs.VirtualFile
import com.intellij.psi.PsiJavaModule
class KotlinBinaryClassCache : Disposable {
private class RequestCache {
internal var virtualFile: VirtualFile? = null
internal var modificationStamp: Long = 0
internal var result: KotlinClassFinder.Result? = null
fun cache(
file: VirtualFile,
result: KotlinClassFinder.Result?
): KotlinClassFinder.Result? {
virtualFile = file
this.result = result
modificationStamp = file.modificationStamp
return result
}
}
private val cache = object : ThreadLocal() {
override fun initialValue(): RequestCache {
return RequestCache()
}
}
override fun dispose() {
// This is only relevant for tests. We create a new instance of Application for each test, and so a new instance of this service is
// also created for each test. However all tests share the same event dispatch thread, which would collect all instances of this
// thread-local if they're not removed properly. Each instance would transitively retain VFS resulting in OutOfMemoryError
cache.remove()
}
companion object {
fun getKotlinBinaryClassOrClassFileContent(
file: VirtualFile, fileContent: ByteArray? = null
): KotlinClassFinder.Result? {
if (file.fileType !== JavaClassFileType.INSTANCE) return null
if (file.name == PsiJavaModule.MODULE_INFO_CLS_FILE) return null
val service = ServiceManager.getService(KotlinBinaryClassCache::class.java)
val requestCache = service.cache.get()
if (file.modificationStamp == requestCache.modificationStamp && file == requestCache.virtualFile) {
return requestCache.result
}
val aClass = ApplicationManager.getApplication().runReadAction(Computable {
@Suppress("DEPRECATION")
VirtualFileKotlinClass.create(file, fileContent)
})
return requestCache.cache(file, aClass)
}
}
}