/
xmlSerializer.kt
206 lines (181 loc) · 6.55 KB
/
xmlSerializer.kt
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// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
@file:Suppress("PackageDirectoryMismatch", "ReplaceGetOrSet", "ReplacePutWithAssignment")
package com.intellij.configurationStore
import com.intellij.openapi.components.BaseState
import com.intellij.openapi.util.JDOMUtil
import com.intellij.reference.SoftReference
import com.intellij.serialization.SerializationException
import com.intellij.serialization.xml.KotlinAwareBeanBinding
import com.intellij.serialization.xml.KotlinxSerializationBinding
import com.intellij.util.io.URLUtil
import com.intellij.util.xmlb.*
import kotlinx.serialization.Serializable
import org.jdom.Element
import org.jdom.JDOMException
import org.jetbrains.annotations.TestOnly
import java.io.IOException
import java.lang.reflect.Type
import java.net.URL
import java.util.concurrent.locks.ReentrantReadWriteLock
import kotlin.concurrent.read
import kotlin.concurrent.write
private val skipDefaultsSerializationFilter = ThreadLocal<SoftReference<SkipDefaultsSerializationFilter>>()
private fun doGetDefaultSerializationFilter(): SkipDefaultsSerializationFilter {
var result = SoftReference.dereference(skipDefaultsSerializationFilter.get())
if (result == null) {
result = object : SkipDefaultsSerializationFilter() {
override fun accepts(accessor: Accessor, bean: Any): Boolean {
return when (bean) {
is BaseState -> bean.accepts(accessor, bean)
else -> super.accepts(accessor, bean)
}
}
}
skipDefaultsSerializationFilter.set(SoftReference(result))
}
return result
}
@Suppress("unused")
private class JdomSerializerImpl : JdomSerializer {
override fun getDefaultSerializationFilter() = doGetDefaultSerializationFilter()
override fun <T : Any> serialize(obj: T, filter: SerializationFilter?, createElementIfEmpty: Boolean): Element? {
try {
val binding = serializer.getRootBinding(obj.javaClass)
return if (binding is BeanBinding) {
// top level expects not null (null indicates error, empty element will be omitted)
binding.serialize(obj, createElementIfEmpty, filter)
}
else {
binding.serialize(obj, null, filter) as Element
}
}
catch (e: SerializationException) {
throw e
}
catch (e: Exception) {
throw XmlSerializationException("Can't serialize instance of ${obj.javaClass}", e)
}
}
override fun serializeObjectInto(obj: Any, target: Element, filter: SerializationFilter?) {
if (obj is Element) {
val iterator = obj.children.iterator()
for (child in iterator) {
iterator.remove()
target.addContent(child)
}
val attributeIterator = obj.attributes.iterator()
for (attribute in attributeIterator) {
attributeIterator.remove()
target.setAttribute(attribute)
}
return
}
val beanBinding = serializer.getRootBinding(obj.javaClass) as KotlinAwareBeanBinding
beanBinding.serializeInto(obj, target, filter ?: getDefaultSerializationFilter())
}
override fun <T> deserialize(element: Element, clazz: Class<T>): T {
if (clazz == Element::class.java) {
@Suppress("UNCHECKED_CAST")
return element as T
}
@Suppress("UNCHECKED_CAST")
try {
return (serializer.getRootBinding(clazz, clazz) as NotNullDeserializeBinding).deserialize(null, element) as T
}
catch (e: SerializationException) {
throw e
}
catch (e: Exception) {
throw XmlSerializationException("Cannot deserialize class ${clazz.name}", e)
}
}
override fun clearSerializationCaches() {
clearBindingCache()
}
override fun deserializeInto(obj: Any, element: Element) {
try {
(serializer.getRootBinding(obj.javaClass) as BeanBinding).deserializeInto(obj, element)
}
catch (e: SerializationException) {
throw e
}
catch (e: Exception) {
throw XmlSerializationException(e)
}
}
override fun <T> deserialize(url: URL, aClass: Class<T>): T {
try {
return deserialize(JDOMUtil.load(URLUtil.openStream(url)), aClass)
}
catch (e: IOException) {
throw XmlSerializationException(e)
}
catch (e: JDOMException) {
throw XmlSerializationException(e)
}
}
}
fun deserializeBaseStateWithCustomNameFilter(state: BaseState, excludedPropertyNames: Collection<String>): Element? {
val binding = serializer.getRootBinding(state.javaClass) as KotlinAwareBeanBinding
return binding.serializeBaseStateInto(state, null, doGetDefaultSerializationFilter(), excludedPropertyNames)
}
private val serializer = MyXmlSerializer()
private abstract class OldBindingProducer<ROOT_BINDING> {
private val cache: MutableMap<Type, ROOT_BINDING> = HashMap()
private val cacheLock = ReentrantReadWriteLock()
@get:TestOnly
val bindingCount: Int
get() = cacheLock.read { cache.size }
fun getRootBinding(aClass: Class<*>, originalType: Type = aClass): ROOT_BINDING {
val cacheKey = createCacheKey(aClass, originalType)
return cacheLock.read {
// create cache only under write lock
cache.get(cacheKey)
} ?: cacheLock.write {
cache.get(cacheKey)?.let {
return it
}
createRootBinding(aClass, originalType, cacheKey, cache)
}
}
protected open fun createCacheKey(aClass: Class<*>, originalType: Type) = originalType
protected abstract fun createRootBinding(aClass: Class<*>, type: Type, cacheKey: Type, map: MutableMap<Type, ROOT_BINDING>): ROOT_BINDING
fun clearBindingCache() {
cacheLock.write {
cache.clear()
}
}
}
private class MyXmlSerializer : XmlSerializerImpl.XmlSerializerBase() {
val bindingProducer = object : OldBindingProducer<Binding>() {
override fun createRootBinding(aClass: Class<*>, type: Type, cacheKey: Type, map: MutableMap<Type, Binding>): Binding {
var binding = createClassBinding(aClass, null, type)
if (binding == null) {
if (aClass.isAnnotationPresent(Serializable::class.java)) {
binding = KotlinxSerializationBinding(aClass)
}
else {
binding = KotlinAwareBeanBinding(aClass)
}
}
map.put(cacheKey, binding)
try {
binding.init(type, this@MyXmlSerializer)
}
catch (e: Throwable) {
map.remove(type)
throw e
}
return binding
}
}
override fun getRootBinding(aClass: Class<*>, originalType: Type): Binding {
return bindingProducer.getRootBinding(aClass, originalType)
}
}
/**
* used by MPS. Do not use if not approved.
*/
fun clearBindingCache() {
serializer.bindingProducer.clearBindingCache()
}