}

            if (gradle.parent == null) {
                def collector = gradle.sharedServices.registerIfAbsent("buildCacheKeyCollector", BuildCacheKeyCollector) {
                    parameters.buildCacheKeyJson.fileValue(new File("${TextUtil.normaliseFileSeparators(file.absolutePath)}"))
                }
                gradle.services.get(${BuildEventListenerRegistryInternal.name}).onOperationCompletion(collector)
            }
        """

                implementation,
                classLoaderHasher.getClassLoaderHash(implementation.getClass().getClassLoader()));
        }

        @Override
        public ValueSnapshot fileValue(File value) {
            return new FileValueSnapshot(value);
        }

        @Override
        public ValueSnapshot attributeValue(Attribute<?> value) {

            throw new IsolationException(implementationClassIdentifier);
        }

        @Override
        public Isolatable<?> fileValue(File value) {
            return new FileValueSnapshot(value);
        }

        @Override
        public Isolatable<?> attributeValue(Attribute<?> value) {

        "RegularFileProperty"         | "File"           | "self.getProperty().getAsFile().getOrNull()"     | ".fileValue(arg0)" | [File]
        "DirectoryProperty"           | "File"           | "self.getProperty().getAsFile().getOrNull()"     | ".fileValue(arg0)" | [File]
        "ConfigurableFileCollection"  | "FileCollection" | "self.getProperty()"                             | ".setFrom(arg0)"   | [FileCollection]

        String assignment;
        switch (upgradedPropertyType) {
            case REGULAR_FILE_PROPERTY:
            case DIRECTORY_PROPERTY:
                assignment = ".fileValue(arg0)";
                break;
            case CONFIGURABLE_FILE_COLLECTION:
                assignment = ".setFrom(arg0)";
                break;
            case LIST_PROPERTY:
            case SET_PROPERTY:

    }

    def 'fails if custom executable does not exist'() {
        def task = project.tasks.create("test", Test)
        task.testClassesDirs = TestFiles.fixed(new File("tmp"))
        task.binaryResultsDirectory.fileValue(new File("out"))
        def invalidExecutable = temporaryFolder.file("invalidExecutable")

        when:
        task.executable = invalidExecutable
        task.javaLauncher.get()

        then:

        String paramValue = options.paramValue ?: "1"
        String fileValue = options.fileValue ?: "String.valueOf(input.length())"
        boolean incremental = options.incremental ?: false

        """
            ext.paramValue = $paramValue

            ${registerFileSizer(fileValue, incremental)}

            project(':util') {
                dependencies {

            if (file == null) {
                set((T) null);
                return;
            }
            set(fromFile(file));
        }

        @Override
        public THIS fileValue(@Nullable File file) {
            set(file);
            return Cast.uncheckedNonnullCast(this);
        }

        @Override
        public THIS fileProvider(Provider<File> provider) {

        when:
        TaskOptionsGenerator.generate(new TestClass5(), reader).getAll()
        then:
        def e = thrown(OptionValidationException)
        e.message == "Option 'fileValue' cannot be cast to type 'java.io.File' in class 'org.gradle.api.internal.tasks.options.OptionReaderTest\$TestClass5'."
    }

    def "fails when method has > 1 parameter"() {
        when:

                    outputFile.get().asFile.text = "classes"
                }
            }

            task compile(type: Compile) {
                sources.fileValue(file("src"))
                outputFile = file("classes.jar")
            }
        """

        // This is to make sure that: