@Override
    public String getSourceName() {
        return "Jabba";
    }

    @Override
    public Set<InstallationLocation> get() {
        return findJavaCandidates(toolchainConfiguration.getJabbaHomeDirectory());
    }

    private Set<InstallationLocation> findJavaCandidates(@Nullable File candidatesDir) {
        if (candidatesDir != null) {
            final File root = new File(candidatesDir, "jdk");

    void setDownloadEnabled(boolean enabled);

    File getAsdfDataDirectory();

    File getIntelliJdkDirectory();

    void setIntelliJdkDirectory(File intellijInstallationDirectory);

    @Nullable File getJabbaHomeDirectory();

    File getSdkmanCandidatesDirectory();

    @Subject
    def supplier = new JabbaInstallationSupplier(toolchainConfiguration)

    def setup() {
        candidates = temporaryFolder.createDir("candidates")
        toolchainConfiguration.getJabbaHomeDirectory() >> candidates
    }

    def "supplies no installations for empty directory"() {
        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

        }
        return new File(systemProperties.getUserHome(), ".jdks");
    }

    @Override
    public File getJabbaHomeDirectory() {
        String jabbaHome = environment.get("JABBA_HOME");
        if (jabbaHome != null) {
            return new File(jabbaHome);
        }
        return null;
    }

    @Override

        }
        return new File(systemProperties.getUserHome(), ".jdks");
    }

    @Override
    public File getJabbaHomeDirectory() {
        String jabbaHome = providerFactory.environmentVariable("JABBA_HOME").getOrNull();
        if (jabbaHome != null) {
            return new File(jabbaHome);
        }
        return null;
    }