@Nonnull
    Session getSession();

    String getGroupId();

    String getArtifactId();

    String getVersion();

    String getClassifier();

    String getExtension();

    String getType();

    static ArtifactFactoryRequest build(
            Session session, String groupId, String artifactId, String version, String extension) {
        return ArtifactFactoryRequest.builder()

                return session.parseVersionConstraint(dependency.getVersion());
            }

            @Override
            public String getExtension() {
                return getType().getExtension();
            }

            @Override
            public Type getType() {
                String type = dependency.getType();
                return session.requireType(type);

    // Implementation
    //

    private File findArtifact(MavenProject project, Artifact artifact, boolean checkUptodate) {
        // POMs are always returned from the file system
        if ("pom".equals(artifact.getExtension())) {
            return project.getFile();
        }

        // Get the matching artifact from the project
        Artifact projectArtifact = findMatchingArtifact(project, artifact);

    public String getClassifier() {
        return null;
    }

    @Override
    public String getDirectory() {
        return getPackaging() + "s";
    }

    @Override
    public String getExtension() {
        return extension;
    }

    @Override
    public String getLanguage() {
        return "java";
    }

    @Override
    public String getPackaging() {
        return type;
    }

            return (ArtifactType) type;
        }
        if (type != null) {
            return new DefaultType(
                    type.id(),
                    type.getLanguage(),
                    type.getExtension(),
                    type.getClassifier(),
                    type.isIncludesDependencies(),
                    type.getPathTypes().toArray(new PathType[0]));
        }
        return null;
    }

                type = new DefaultType(
                        id,
                        languageRegistry.lookup(handler.getLanguage()).orElseGet(() -> handler::getLanguage),
                        handler.getExtension(),
                        handler.getClassifier(),
                        handler.isIncludesDependencies(),
                        JavaPathType.CLASSES,
                        JavaPathType.MODULES);
            }

                        + cause.getMessage(),
                cause);
        this.extension = extension;
    }

    public CoreExtension getExtension() {
        return extension;
    }

        return artifact.getGroupId();
    }

    public String getArtifactId() {
        return artifact.getArtifactId();
    }

    public String getType() {
        return artifact.getExtension();
    }

    public String getClassifier() {
        return artifact.getClassifier();
    }

    public String getVersion() {
        return artifact.getBaseVersion();
    }

    @Override
    public String getClassifier() {
        return classifier;
    }

    @Override
    public String getDirectory() {
        return null;
    }

    @Override
    public String getExtension() {
        return extension;
    }

    @Override
    public String getLanguage() {
        return "none";
    }

    @Override
    public String getPackaging() {
        return packaging;

    /**
     * Returns the file name extension of the artifact;
     * e.g. "jar", "pom", "xml", etc.
     *
     * @return the file extension
     */
    String getExtension();

    String getDirectory();

    /**
     * Returns the default classifier used if a different one is not set in pom.xml.
     *
     * @return the classifier
     */
    String getClassifier();