encoder.writeNullableString(metaData.getEtag());
                encoder.writeBoolean(metaData.getSha1() != null);
                if (metaData.getSha1() != null) {
                    encoder.writeString(metaData.getSha1().toString());
                }
            }
        }

        private String relativizeAndNormalizeFilePath(File cachedFile) {

import java.io.File;

/**
 * Represents a file backed local resource.
 */
public interface LocallyAvailableResource extends Resource {

    File getFile();

    HashCode getSha1();

    long getLastModified();

    long getContentLength();

    public String toString() {
        return getDisplayName();
    }

    @Override
    public String getDisplayName() {
        return getFile().getPath();
    }

    @Override
    public HashCode getSha1() {
        if (sha1 == null) {
            sha1 = factory.create();
        }
        return sha1;
    }

    @Override
    public long getContentLength() {
        if (contentLength == null) {

    }

    @Override
    public SftpResource getMd5() {
        return new SftpResource(getServer(), getFile().getParentFile().file(getFile().getName() + ".md5"));
    }

    @Override
    public SftpResource getSha1() {
        return new SftpResource(getServer(), getFile().getParentFile().file(getFile().getName() + ".sha1"));
    }

    @Override
    public SftpResource getSha256() {

     * “X-Checksum-Sha1” that makes the sha1 available cheaply. In this case it makes sense to advertise this as metadata here.
     *
     * @return The sha1, or null if it's unknown.
     */
    @Nullable
    HashCode getSha1();

    boolean wasMissing();

package org.gradle.test.fixtures.resource;

import org.gradle.test.fixtures.ModuleArtifact;

public interface RemoteArtifact extends RemoteResource, ModuleArtifact {
    RemoteResource getMd5();

    RemoteResource getSha1();

    RemoteResource getSha256();

    RemoteResource getSha512();

 */
public interface MetadataFileSource extends PersistentModuleSource {
    int CODEC_ID = 1;

    File getArtifactFile();

    ModuleComponentArtifactIdentifier getArtifactId();

    HashCode getSha1();

    @Override
    default int getCodecId() {
        return CODEC_ID;
    }

        this.response = response;

        String etag = getEtag(response);
        this.metaData = new DefaultExternalResourceMetaData(source, getLastModified(), getContentLength(), getContentType(), etag, getSha1(response, etag), getFilename(), response.wasMissing());
    }

    public URI getURI() {
        return source;
    }

    @Override
    public String toString() {

    }

    @Override
    S3Resource getMd5() {
        return new S3Resource(server, file.parentFile.file(file.name + ".md5"), repositoryPath, bucket)
    }

    @Override
    S3Resource getSha1() {
        return new S3Resource(server, file.parentFile.file(file.name + ".sha1"), repositoryPath, bucket)
    }

    @Override
    S3Resource getSha256() {

        return contentType;
    }

    @Nullable
    @Override
    public String getEtag() {
        return etag;
    }

    @Nullable
    @Override
    public HashCode getSha1() {
        return sha1;
    }

    @Override
    public boolean wasMissing() {
        return wasMissing;
    }

    @Nullable
    @Override
    public String getFilename() {