如何在用Kotlin编写的Intellij IDEA Gradle插件项目中包含Kotlin PSI类（例如KtClass）？

Question

我试图写一个插件添加模拟数据到一个Kotlin项目。第一部分涉及查找当前项目中继承自特定基类的所有Kotlin类。我希望能够解析这些类，读取注释的值，并获得构造函数的结构。然后，该信息将用于向项目添加代码，将选定类的实例添加到模拟数据库实例中。

java.lang.ClassCastException: class org.jetbrains.kotlin.psi.KtFile cannot be cast to class org.jetbrains.kotlin.psi.KtFile (org.jetbrains.kotlin.psi.KtFile is in unnamed module of loader com.intellij.ide.plugins.cl.PluginClassLoader @2ed18f3d; org.jetbrains.kotlin.psi.KtFile is in unnamed module of loader com.intellij.ide.plugins.cl.PluginClassLoader @4308c14c)

plugins {
    id 'java'
    id 'org.jetbrains.intellij' version '0.4.11'
    id 'org.jetbrains.kotlin.jvm' version '1.3.31'
}

group 'se.winassist'
version '1.0'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
    implementation "org.jetbrains.kotlin:kotlin-compiler-embeddable:1.3.31"
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

// See https://github.com/JetBrains/gradle-intellij-plugin/
intellij {
    version '2019.2.3'
}
compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
patchPluginXml {
    changeNotes """
      Add change notes here.<br>
      <em>most HTML tags may be used</em>"""
}

import com.intellij.openapi.actionSystem.AnAction
import com.intellij.openapi.actionSystem.AnActionEvent
import com.intellij.openapi.actionSystem.CommonDataKeys
import com.intellij.openapi.ui.Messages
import org.jetbrains.kotlin.psi.KtFile

class CreateMockdataFromPostgreSQLClass: AnAction() {
    override fun actionPerformed(e: AnActionEvent) {
        val project = e.getRequiredData(CommonDataKeys.PROJECT)
        val kotlinFileHandler = KotlinFileHandler(project)
        val dbClasses = kotlinFileHandler.getAllKotlinDbClasses()
        val classNames = dbClasses.map {
            val ktFile = it as KtFile
            ktFile.name
        }.joinToString(separator = "\n")
        Messages.showInfoMessage(classNames, "Test")
    }
}

import com.intellij.openapi.project.Project
import com.intellij.openapi.roots.ProjectRootManager
import com.intellij.psi.PsiDirectory
import com.intellij.psi.PsiFile
import com.intellij.psi.PsiManager

data class KotlinFileHandler(val aProject: Project) {

    fun getAllKotlinDbClasses(): List<PsiFile> {
        val roots = ProjectRootManager.getInstance(aProject).contentSourceRoots
        val dirs = roots.map { PsiManager.getInstance(aProject).findDirectory(it) }
        val result = mutableListOf<PsiFile>()
        getKotlinDbClassesInPsiDir(result, dirs)
        return result.toList()
    }

    private tailrec fun getKotlinDbClassesInPsiDir(aResult: MutableList<PsiFile>, aPsiDirectoryList: List<PsiDirectory?>) {
        if (aPsiDirectoryList.isEmpty()) return

        val subDirectories = mutableListOf<PsiDirectory>()
        aPsiDirectoryList.filter { it != null }.forEach {
            val children = it!!.children
            val files = children.filter {
                it is PsiFile && it.language.toString().toLowerCase() == "language: kotlin"
            }.map { it as PsiFile }
            subDirectories += children.filter { it is PsiDirectory }.map { it as PsiDirectory }
            aResult += files.filter {
                hasBasePersistenceSuperclass(it) && hasTableNameAnnotation(it)
            }.toList()
        }
        getKotlinDbClassesInPsiDir(aResult, subDirectories)
    }
}

我想我把gradle设置错了。我已经寻找了一个适当的设置广泛，但未能找到一个工作的解决方案。有人能指导我正确的分级设置吗？

Answer 1

您是否通过向IntelliJ任务添加插件进行了检查

intellij {
  version '2020.1'
  plugins = ['java','Kotlin']
  intellij.type = 'IC'
}

请检查并更新