Examples with TemplatesConfiguration com.devonfw.cobigen.impl.config.entity.io.TemplatesConfiguration used on opensource projects

Example 1 with TemplatesConfiguration

use of com.devonfw.cobigen.impl.config.entity.io.TemplatesConfiguration in project cobigen by devonfw.

the class TemplatesConfigurationReader method readConfiguration.

/**
 * Reads the templates configuration.
 */
private void readConfiguration() {
    // workaround to make JAXB work in OSGi context by
    // https://github.com/ControlSystemStudio/cs-studio/issues/2530#issuecomment-450991188
    final ClassLoader orig = Thread.currentThread().getContextClassLoader();
    if (JvmUtil.isRunningJava9OrLater()) {
        Thread.currentThread().setContextClassLoader(JAXBContext.class.getClassLoader());
    }
    try (InputStream in = Files.newInputStream(this.configFilePath)) {
        Unmarshaller unmarschaller = JAXBContext.newInstance(TemplatesConfiguration.class).createUnmarshaller();
        // Unmarshal without schema checks for getting the version attribute of the root node.
        // This is necessary to provide an automatic upgrade client later on
        Object rootNode = unmarschaller.unmarshal(in);
        if (rootNode instanceof TemplatesConfiguration) {
            BigDecimal configVersion = ((TemplatesConfiguration) rootNode).getVersion();
            if (configVersion == null) {
                throw new InvalidConfigurationException(this.configFilePath.toUri().toString(), "The required 'version' attribute of node \"templatesConfiguration\" has not been set");
            } else {
                VersionValidator validator = new VersionValidator(Type.TEMPLATES_CONFIGURATION, MavenMetadata.VERSION);
                validator.validate(configVersion.floatValue());
            }
        } else {
            throw new InvalidConfigurationException(this.configFilePath.toUri().toString(), "Unknown Root Node. Use \"templatesConfiguration\" as root Node");
        }
        // If we reach this point, the configuration version and root node has been validated.
        // Unmarshal with schema checks for checking the correctness and give the user more hints to
        // correct his failures
        SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        TemplatesConfigurationVersion latestConfigurationVersion = TemplatesConfigurationVersion.getLatest();
        try (InputStream schemaStream = getClass().getResourceAsStream("/schema/" + latestConfigurationVersion + "/templatesConfiguration.xsd");
            InputStream configInputStream = Files.newInputStream(this.configFilePath)) {
            Schema schema = schemaFactory.newSchema(new StreamSource(schemaStream));
            unmarschaller.setSchema(schema);
            rootNode = unmarschaller.unmarshal(configInputStream);
            this.configNode = (TemplatesConfiguration) rootNode;
        }
    } catch (JAXBException e) {
        // try getting SAXParseException for better error handling and user support
        Throwable parseCause = ExceptionUtil.getCause(e, SAXParseException.class, UnmarshalException.class);
        String message = "";
        if (parseCause != null && parseCause.getMessage() != null) {
            message = parseCause.getMessage();
        }
        throw new InvalidConfigurationException(this.configFilePath.toUri().toString(), "Could not parse configuration file:\n" + message, e);
    } catch (SAXException e) {
        // Should never occur. Programming error.
        throw new IllegalStateException("Could not parse templates configuration schema. Please state this as a bug.");
    } catch (NumberFormatException e) {
        // So provide help
        throw new InvalidConfigurationException(this.configFilePath.toUri().toString(), "Invalid version number defined. The version of the templates configuration should consist of 'major.minor' version.", e);
    } catch (IOException e) {
        throw new InvalidConfigurationException(this.configFilePath.toUri().toString(), "Could not read templates configuration file.", e);
    } finally {
        Thread.currentThread().setContextClassLoader(orig);
    }
}