Kotlin: Unresolved reference: javaClass

Question

I'm hoping someone has come across the issues that i'm seeing while building my java/Kotlin project. The project is interop with java and kotlin, with the following versions:

• Jdk 1.7
• Kotlin 0.9.66
• Gradle (wrapper) 2.0

Kotlin has been compiling fine prior to a few changes i made i.e. converted a few java classes to equivalent kotlin versions.

Here are the errors that i'm seeing:

  c:\projects\myproject>gradlew  :java:workspace:models:compileKotlin  --stacktrace     :java:workspace:models:compileKotlin

w: Annotations path entry points to a non-existent location:
C:\projects\myproject\java\workspace\models\annotations

e: C:\projects\CustomerProfileEmail.kt: (15, 32): Unresolved reference: toLowerCase
e: C:\projects\CustomerProfilePhone.kt: (34, 22): Unresolved reference: equalsIgnoreCase
e: C:\projects\Account.kt: (17, 21): Unresolved reference: javaClass
e: C:\projects\Account.kt: (18, 21): Unresolved reference: javaClass
e: C:\projects\Account.kt: (31, 15): Unresolved reference: indexOf
e: C:\projects\Account.kt: (35, 15): Expression 'length' of type 'kotlin.Int' cannot be invoked as a function. The function invoke() is not found
e: C:\projects\Account.kt: (39, 15): Expression 'length' of type 'kotlin.Int' cannot be invoked as a function. The function invoke() is not found
e: C:\projects\Balance.kt: (10, 21): Unresolved reference: javaClass
e: C:\projects\Balances.kt: (12, 21): Unresolved reference: firstOrNull
e: C:\projects\Balances.kt: (12, 35): Cannot infer a type for this parameter. To specify it explicitly use the {(p : Type) -> ...} notation
e: C:\projects\Debit.kt: (7, 12):Unresolved reference: javaClass
e: C:\projects\ProgramR.kt: (12, 21): Unresolved reference: javaClass
e: C:\projects\ProgramR.kt: (13, 21): Unresolved reference: javaClass
e: C:\projects\Transaction.kt: (7, 12): Unresolved reference: javaClass
e: C:\projects\Transaction.kt: (7, 40): Unresolved reference: javaClass
e: C:\projects\Adjustment.kt: (13,21): Unresolved reference: javaClass
e: C:\projects\Reward.kt: (12, 24): Unresolved reference: javaClass
:java:workspace:models:compileKotlin FAILED

FAILURE: Build failed with an exception.

Here is an example of the source code:

import javax.xml.bind.annotation.*

XmlAccessorType(XmlAccessType.FIELD)
XmlType
XmlSeeAlso(javaClass<LoyaltyCredit>(), javaClass<Debit>())
public open class Transaction: TransactionParent(){
    public var account: Account? = null
    public var balances: Balances? = null
    public var rewards: Rewards? = null
}

Gradle script

repositories {
    mavenCentral()
}

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.connorgarvey.gradle:gradle-grails-wrapper:1.0'
        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:0.9.66'
        classpath 'org.jetbrains.kotlin:kotlin-stdlib:0.9.66'
    }
}

apply from: 'build/includes.gradle'

I have already seen this: https://devnet.jetbrains.net/message/5478050 didn't help.

Any help would be greatly appreciated!

Answer 1

Compare your script with Kotlin reference about Gradle.

Kotlin Stdlib dependency should be in another scope, not buildscript. Also Kotlin plugin should be applied using apply plugin.