org.jetbrains.kotlin.name.FqNamesUtil.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.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.isJavaIdentifierPart(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
}