/**
 * Represents the canonical metadata artifact for a repository: Ivy descriptor or Maven POM.
 */
public interface MetadataArtifactProvider {
    IvyArtifactName getMetaDataArtifactName(String module);

public class IvyMetadataArtifactProvider implements MetadataArtifactProvider {

    public static final MetadataArtifactProvider INSTANCE = new IvyMetadataArtifactProvider();

    @Override
    public IvyArtifactName getMetaDataArtifactName(String module) {
        return new DefaultIvyArtifactName("ivy", "ivy", "xml");
    }

public class MavenMetadataArtifactProvider implements MetadataArtifactProvider {
    public static final MavenMetadataArtifactProvider INSTANCE = new MavenMetadataArtifactProvider();

    @Override
    public IvyArtifactName getMetaDataArtifactName(String moduleName) {
        return new DefaultIvyArtifactName(moduleName, "pom", "pom");
    }

        // List modules based on metadata files (artifact version is not considered in listVersionsForAllPatterns())
        IvyArtifactName metaDataArtifact = metadataArtifactProvider.getMetaDataArtifactName(module.getName());
        versionLister.listVersions(module, metaDataArtifact, ivyPatterns, result);
    }

        return sha1;
    }

    private ModuleDescriptorArtifactMetadata getMetaDataArtifactFor(ModuleComponentIdentifier moduleComponentIdentifier) {
        IvyArtifactName ivyArtifactName = metadataArtifactProvider.getMetaDataArtifactName(moduleComponentIdentifier.getModule());
        return new DefaultModuleDescriptorArtifactMetadata(moduleComponentIdentifier, ivyArtifactName);
    }

    }

    private ModuleDescriptorArtifactMetadata getMetaDataArtifactFor(ModuleComponentIdentifier moduleComponentIdentifier) {
        IvyArtifactName ivyArtifactName = metadataArtifactProvider.getMetaDataArtifactName(moduleComponentIdentifier.getModule());
        return new DefaultModuleDescriptorArtifactMetadata(moduleComponentIdentifier, ivyArtifactName);
    }