org.jetbrains.kotlin.name.FqNamesUtil.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
* 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.name
fun FqName.isSubpackageOf(packageName: FqName): Boolean {
return when {
this == packageName -> true
packageName.isRoot -> true
else -> isSubpackageOf(this.asString(), packageName.asString())
}
}
fun FqName.isChildOf(packageName: FqName): Boolean = parentOrNull() == packageName
private fun isSubpackageOf(subpackageNameStr: String, packageNameStr: String): Boolean {
return subpackageNameStr.startsWith(packageNameStr) && subpackageNameStr[packageNameStr.length] == '.'
}
fun FqName.isOneSegmentFQN(): Boolean = !isRoot && parent().isRoot
/**
* Get the tail part of the FQ name by stripping a prefix. If FQ name does not begin with the given prefix, it will be returned as is.
*
* Examples:
* "org.jetbrains.kotlin".tail("org") = "jetbrains.kotlin"
* "org.jetbrains.kotlin".tail("") = "org.jetbrains.kotlin"
* "org.jetbrains.kotlin".tail("org.jetbrains.kotlin") = ""
* "org.jetbrains.kotlin".tail("org.jetbrains.gogland") = "org.jetbrains.kotlin"
*/
fun FqName.tail(prefix: FqName): FqName {
return when {
!isSubpackageOf(prefix) || prefix.isRoot -> this
this == prefix -> FqName.ROOT
else -> FqName(asString().substring(prefix.asString().length + 1))
}
}
fun FqName.parentOrNull(): FqName? = if (this.isRoot) null else parent()
private enum class State {
BEGINNING,
MIDDLE,
AFTER_DOT
}
// Check that it is javaName(\.javaName)* or an empty string
fun isValidJavaFqName(qualifiedName: String?): Boolean {
if (qualifiedName == null) return false
var state = State.BEGINNING
for (c in qualifiedName) {
when (state) {
State.BEGINNING, State.AFTER_DOT -> {
if (!Character.isJavaIdentifierStart(c)) return false
state = State.MIDDLE
}
State.MIDDLE -> {
if (c == '.') {
state = State.AFTER_DOT
} else if (!Character.isJavaIdentifierPart(c)) return false
}
}
}
return state != State.AFTER_DOT
}
fun FqName.findValueForMostSpecificFqname(values: Map): V? {
val suitableItems = values.filter { (fqName, _) -> this == fqName || this.isChildOf(fqName) }
.takeIf { it.isNotEmpty() } ?: return null
return suitableItems.minByOrNull { (fqName, _) -> fqName.tail(this).asString().length }?.value
}
fun ClassId.callableIdForConstructor(): CallableId {
return if (isNestedClass) {
CallableId(outerClassId!!, shortClassName)
} else {
CallableId(packageFqName, shortClassName)
}
}