* @author koichik
 */
public abstract class SchemaFactoryUtil {

    private static final Logger logger = Logger.getLogger(SchemaFactoryUtil.class);

    /**
     * W3C XML Schemaのための{@link SchemaFactory}を生成します。
     *
     * @return W3C XML Schemaのための{@link SchemaFactory}
     */
    public static SchemaFactory newW3cXmlSchemaFactory() {
        return newW3cXmlSchemaFactory(false);
    }

                    factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
                    factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
                    final DocumentBuilder builder = factory.newDocumentBuilder();
                    final Document document = builder.parse(is);

            final SAXParser parser = factory.newSAXParser();
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
            parser.parse(is, this);
        } catch (final Exception e) {
            throw new GsaConfigException("Failed to parse XML file.", e);
        }
    }

    @Override

    }

    @Test
    void testFutureSchemaModelVersion() throws Exception {
        File f1 = getTestFile("src/test/resources/projects/future-schema-model-version-pom.xml");

        ProjectBuildingException e = assertThrows(
                ProjectBuildingException.class, () -> getProject(f1), "Expected to fail for future versions");

        // effective model.
        //
        // As of 3.4, the model version is mandatory even in raw models. The XML element still is optional in the
        // XML schema and this will not change anytime soon. We do not want to build effective models based on
        // models without a version starting with 3.4.

     */
    public static Schema newW3cXmlSchema(final Source schema) {
        assertArgumentNotNull("schema", schema);
        return newSchema(SchemaFactoryUtil.newW3cXmlSchemaFactory(), schema);
    }

    /**
     * URLからW3C XML Schemaのための{@link Schema}を生成します。
     *
     * @param schema
     *            W3C XML SchemaのURL。{@literal null}であってはいけません
     * @return {@link Schema}
     */

    private static final String BUILD_POM_CLASSIFIER = "build";

    private static final String NAMESPACE_FORMAT = "http://maven.apache.org/POM/%s";

    private static final String SCHEMA_LOCATION_FORMAT = "https://maven.apache.org/xsd/maven-%s.xsd";

    private final Set<Path> toDelete = new CopyOnWriteArraySet<>();

    private final ConsumerPomBuilder builder;

    @Inject

        if (!external) {
            try {
                factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
                factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, "");
            } catch (final Exception e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to set a property.", e);
                }
            }
        }
        try {