.kotlin.kotlin-compiler.1.3.11.source-code.CacheAttributesDiff.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.incremental.storage.version
/**
* Diff between actual and expected cache attributes.
* [status] are calculated based on this diff (see [CacheStatus]).
* Based on that [status] system may perform required actions (i.e. rebuild something, clearing caches, etc...).
*
* [CacheAttributesDiff] can be used to cache current attribute values and as facade for version operations.
*/
data class CacheAttributesDiff(
val manager: CacheAttributesManager,
val actual: Attrs?,
val expected: Attrs?
) {
val status: CacheStatus
get() =
if (expected != null) {
if (actual != null && manager.isCompatible(actual, expected)) CacheStatus.VALID
else CacheStatus.INVALID
} else {
if (actual != null) CacheStatus.SHOULD_BE_CLEARED
else CacheStatus.CLEARED
}
fun saveExpectedIfNeeded() {
if (expected != actual) manager.writeActualVersion(expected)
}
override fun toString(): String {
return "$status: actual=$actual -> expected=$expected"
}
}