}

    public DefaultInstalledJdk(File javaHome, JavaVersion javaVersion) {
        this.javaHome = javaHome;
        this.javaVersion = javaVersion;
    }

    public JavaVersion getJavaVersion() {
        return javaVersion;
    }

    public File getJavaHome() {
        return javaHome;
    }

    }

    private JavaVersion toJavaVersion(ideaLanguageLevel) {
        JavaVersion.valueOf(ideaLanguageLevel.level.replaceFirst("JDK", "VERSION"));
    }

    private JavaVersion getDefaultIdeaPluginLanguageLevelForNonJavaProjects() {
        JavaVersion.VERSION_1_6 // see IdeaPlugin#configureIdeaProject(Project)
    }

    private JavaVersion getDefaultIdeaPluginLanguageLevelForJavaProjects() {

        'compatible platforms, but additional attributes unmatched' | [platform: JavaVersion.JAVA8]                 | [platform: JavaVersion.JAVA6, flavor: 'free'] | [platform: JavaVersion.JAVA6, flavor: 'paid'] | null

        'openJdk4'       | openJdkJvm('4')          | JavaVersion.VERSION_1_4 | 'OpenJDK 4'                  | false
        'openJdk5'       | openJdkJvm('5')          | JavaVersion.VERSION_1_5 | 'OpenJDK 5'                  | false
        'openJdk6'       | openJdkJvm('6')          | JavaVersion.VERSION_1_6 | 'OpenJDK 6'                  | false

 */

package org.gradle.plugins.ide.internal.tooling.idea;

import org.gradle.api.JavaVersion;
import org.gradle.plugins.ide.internal.tooling.java.DefaultInstalledJdk;

import java.io.Serializable;

public class DefaultIdeaJavaLanguageSettings implements Serializable {
    private JavaVersion languageLevel;
    private JavaVersion targetBytecodeVersion;
    private DefaultInstalledJdk jdk;

    }

    private JavaVersion toJavaVersion(ideaLanguageLevel) {
        JavaVersion.valueOf(ideaLanguageLevel.level.replaceFirst("JDK", "VERSION"));
    }

    private JavaVersion getDefaultIdeaPluginLanguageLevelForNonJavaProjects() {
        JavaVersion.VERSION_1_6 // see IdeaPlugin#configureIdeaProject(Project)
    }

    private JavaVersion getDefaultIdeaPluginLanguageLevelForJavaProjects() {

        private final File buildJavaHome
        private final JavaVersion javaVersion
        private final InvocationSettings invocation

        JavaVersionMutator(InvocationSettings invocation, JavaVersion javaVersion, File buildJavaHome) {
            this.invocation = invocation
            this.javaVersion = javaVersion
            this.buildJavaHome = buildJavaHome
        }

        @Override

        ext.targetCompatibility == JavaVersion.VERSION_1_6

        when:
        ext.sourceCompatibility = JavaVersion.VERSION_1_8

        then:
        project.sourceCompatibility == JavaVersion.VERSION_1_8
        project.targetCompatibility == JavaVersion.VERSION_1_8
        ext.sourceCompatibility == JavaVersion.VERSION_1_8
        ext.targetCompatibility == JavaVersion.VERSION_1_8

public class DaemonJvmCriteria {
    private final JavaLanguageVersion javaVersion;
    private final JvmVendorSpec vendorSpec;
    private final JvmImplementation jvmImplementation;

    public DaemonJvmCriteria(JavaLanguageVersion javaVersion, JvmVendorSpec vendorSpec, JvmImplementation jvmImplementation) {
        this.javaVersion = javaVersion;
        this.vendorSpec = vendorSpec;
        this.jvmImplementation = jvmImplementation;

    @get:Input
    abstract val javaVersion: Property<String>
    @get:OutputFile
    abstract val output: RegularFileProperty

    @TaskAction
    fun execute() {
        output.get().asFile.writeText("Java version: ${javaVersion.get()}")
    }
}

tasks.register<WriteJavaVersionTask>("writeJavaVersion") {
    javaVersion.set("17") // <1>
    javaVersion = "17" // <2>