import org.gradle.jvm.toolchain.JavaLanguageVersion;
import org.gradle.jvm.toolchain.JavaToolchainSpec;

public class JavaToolchainInput {

    private final JavaLanguageVersion javaLanguageVersion;
    private final String vendor;
    private final String implementation;

    public JavaToolchainInput(JavaToolchainSpec spec) {
        this.javaLanguageVersion = spec.getLanguageVersion().getOrNull();

        def base = new JavaToolchainInput(baseSpec)
        def diff = new JavaToolchainInput(diffSpec)

        expect:
        base.languageVersion == diff.languageVersion
        base.vendor == diff.vendor
        base.implementation == diff.implementation
    }

    def "language version is stable"() {
        given:
        def base = new JavaToolchainInput(newSpec(11))

    private final JavaLanguageVersion javaVersion;
    private final JvmInstallationMetadata metadata;
    private final JavaToolchainInput input;
    private final boolean isFallbackToolchain;

    public JavaToolchain(
        JvmInstallationMetadata metadata,
        FileFactory fileFactory,
        JavaToolchainInput input,
        boolean isFallbackToolchain
    ) {
        this.javaHome = fileFactory.dir(metadata.getJavaHome().toFile());

        when:
        def javaToolchain = new JavaToolchain(metadata, TestFiles.fileFactory(), Mock(JavaToolchainInput) {
            getLanguageVersion() >> JavaLanguageVersion.of(languageVersion)
            getVendor() >> DefaultJvmVendorSpec.any().toString()
            getImplementation() >> JvmImplementation.VENDOR_SPECIFIC.toString()

            .map(result -> {
                warnIfAutoProvisionedToolchainUsedWithoutRepositoryDefinitions(result.location);
                return new JavaToolchain(result.metadata, fileFactory, new JavaToolchainInput(spec), false);
            });
    }

    private void warnIfAutoProvisionedToolchainUsedWithoutRepositoryDefinitions(InstallationLocation javaHome) {

import org.gradle.internal.jvm.inspection.JvmInstallationMetadata
import org.gradle.jvm.toolchain.internal.DefaultToolchainJavaLauncher
import org.gradle.jvm.toolchain.internal.JavaToolchain
import org.gradle.jvm.toolchain.internal.JavaToolchainInput
import org.gradle.process.CommandLineArgumentProvider
import org.gradle.util.TestUtil

import static org.gradle.util.internal.WrapUtil.toLinkedSet
import static org.gradle.util.internal.WrapUtil.toSet