kotlin.script.experimental.jvmhost.CompiledScriptJarsCache.kt Maven / Gradle / Ivy

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Kotlin "main" script definition

There is a newer version: 2.1.20-Beta1

/*
 * Copyright 2010-2019 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 kotlin.script.experimental.jvmhost

import java.io.File
import java.net.URLClassLoader
import java.util.jar.JarInputStream
import kotlin.script.experimental.api.CompiledScript
import kotlin.script.experimental.api.ScriptCompilationConfiguration
import kotlin.script.experimental.api.SourceCode
import kotlin.script.experimental.api.hostConfiguration
import kotlin.script.experimental.host.ScriptingHostConfiguration
import kotlin.script.experimental.jvm.CompiledJvmScriptsCache
import kotlin.script.experimental.jvm.baseClassLoader
import kotlin.script.experimental.jvm.impl.KJvmCompiledScript
import kotlin.script.experimental.jvm.impl.createScriptFromClassLoader
import kotlin.script.experimental.jvm.jvm

open class CompiledScriptJarsCache(val scriptToFile: (SourceCode, ScriptCompilationConfiguration) -> File?) :
    CompiledJvmScriptsCache {

    override fun get(script: SourceCode, scriptCompilationConfiguration: ScriptCompilationConfiguration): CompiledScript<*>? {
        val file = scriptToFile(script, scriptCompilationConfiguration)
            ?: throw IllegalArgumentException("Unable to find a mapping to a file for the script $script")

        if (!file.exists()) return null

        val className = file.inputStream().use { ostr ->
            JarInputStream(ostr).use {
                it.manifest.mainAttributes.getValue("Main-Class")
            }
        }
        val classLoader = URLClassLoader(
            arrayOf(file.toURI().toURL()),
            scriptCompilationConfiguration[ScriptCompilationConfiguration.hostConfiguration]?.get(ScriptingHostConfiguration.jvm.baseClassLoader)
        )

        return createScriptFromClassLoader(className, classLoader)
    }

    override fun store(
        compiledScript: CompiledScript<*>,
        script: SourceCode,
        scriptCompilationConfiguration: ScriptCompilationConfiguration
    ) {
        val file = scriptToFile(script, scriptCompilationConfiguration)
            ?: throw IllegalArgumentException("Unable to find a mapping to a file for the script $script")

        val jvmScript = (compiledScript as? KJvmCompiledScript<*>)
            ?: throw IllegalArgumentException("Unsupported script type ${compiledScript::class.java.name}")

        jvmScript.saveToJar(file)
    }
}