Java ValidationEventHandler類代碼示例

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public synchronized void setJaxbContext(Class... classesToBeBound) {
	try {
		setJaxbContext(JAXBContext.newInstance(classesToBeBound));
		
		// Every time we set the JAXBContext, we need to also set the marshaller and unmarshaller for EXICodec
		getExiCodec().setUnmarshaller(getJaxbContext().createUnmarshaller());
		getExiCodec().setMarshaller(getJaxbContext().createMarshaller());
		
		/*
		 * JAXB by default silently ignores errors. Adding this code to throw an exception if 
		 * something goes wrong.
		 */
		getExiCodec().getUnmarshaller().setEventHandler(
			    new ValidationEventHandler() {
			        @Override
					public boolean handleEvent(ValidationEvent event ) {
			            throw new RuntimeException(event.getMessage(),
			                                       event.getLinkedException());
			        }
			});
	} catch (JAXBException e) {
		getLogger().error("A JAXBException occurred while trying to set JAXB context", e);
	}
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public void reportError( ValidationEvent ve ) throws SAXException {
    ValidationEventHandler handler;

    try {
        handler = marshaller.getEventHandler();
    } catch( JAXBException e ) {
        throw new SAXException2(e);
    }

    if(!handler.handleEvent(ve)) {
        if(ve.getLinkedException() instanceof Exception)
            throw new SAXException2((Exception)ve.getLinkedException());
        else
            throw new SAXException2(ve.getMessage());
    }
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
/**
 * Reports an error to the user, and asks if s/he wants
 * to recover. If the canRecover flag is false, regardless
 * of the client instruction, an exception will be thrown.
 *
 * Only if the flag is true and the user wants to recover from an error,
 * the method returns normally.
 *
 * The thrown exception will be catched by the unmarshaller.
 */
public void handleEvent(ValidationEvent event, boolean canRecover ) throws SAXException {
    ValidationEventHandler eventHandler = parent.getEventHandler();

    boolean recover = eventHandler.handleEvent(event);

    // if the handler says "abort", we will not return the object
    // from the unmarshaller.getResult()
    if(!recover)    aborted = true;

    if( !canRecover || !recover )
        throw new SAXParseException2( event.getMessage(), locator,
            new UnmarshalException(
                event.getMessage(),
                event.getLinkedException() ) );
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
@Nonnull
private static javax.xml.bind.Marshaller marshallerFor(@Nonnull TestSuites element) {
    final javax.xml.bind.Marshaller marshaller;
    try {
        marshaller = JAXB_CONTEXT.createMarshaller();
        marshaller.setProperty(JAXB_FORMATTED_OUTPUT, true);
        marshaller.setEventHandler(new ValidationEventHandler() {
            @Override
            public boolean handleEvent(ValidationEvent event) {
                return true;
            }
        });
    } catch (final Exception e) {
        throw new RuntimeException("Could not create marshaller to marshall " + element + ".", e);
    }
    return marshaller;
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
static UserCredentialsList loadCredentialsList(File credentialsFile, ValidationEventHandler validationEventHandler) throws Exception {
    if (credentialsFile.exists()) {
        final SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        final Schema schema = schemaFactory.newSchema(UserCredentialsList.class.getResource(CREDENTIALS_XSD));

        final Unmarshaller unmarshaller = JAXB_CONTEXT.createUnmarshaller();
        unmarshaller.setSchema(schema);
        unmarshaller.setEventHandler(validationEventHandler);
        final JAXBElement<UserCredentialsList> element = unmarshaller.unmarshal(new StreamSource(credentialsFile),
                UserCredentialsList.class);
        UserCredentialsList credentialsList = element.getValue();
        return credentialsList;
    } else {
        final String notFoundMessage = "The credentials configuration file was not found at: " +
                credentialsFile.getAbsolutePath();
        throw new FileNotFoundException(notFoundMessage);
    }
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public static File write(DynamicVRPREPModel dynamicVRPREPModel, Path outputPath) throws JAXBException, SAXException {

		outputPath.getParent().toFile().mkdirs();

		InputStream stream = Instance.class.getResourceAsStream("/xsd/instance.xsd");
		Source schemaSource = new StreamSource(stream);
		SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
		Schema schema = sf.newSchema(schemaSource);

		JAXBContext jc = JAXBContext.newInstance(DynamicVRPREPModel.class);
		Marshaller marshaller = jc.createMarshaller();
		marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
		marshaller.setSchema(schema);
		marshaller.setEventHandler(new ValidationEventHandler() {
			public boolean handleEvent(ValidationEvent event) {
				System.err.println("MESSAGE:  " + event.getMessage());
				return true;
			}
		});
		marshaller.marshal(dynamicVRPREPModel, outputPath.toFile());

		return outputPath.toFile();

	}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public File writeToFile(Path outputPath) throws JAXBException, SAXException {
	outputPath.getParent().toFile().mkdirs();

	InputStream stream = Instance.class.getResourceAsStream("/xsd/instance.xsd");
	Source schemaSource = new StreamSource(stream);
	SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
	Schema schema = sf.newSchema(schemaSource);

	JAXBContext jc = JAXBContext.newInstance(ResultData.class);
	Marshaller marshaller = jc.createMarshaller();
	marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
	marshaller.setSchema(schema);
	marshaller.setEventHandler(new ValidationEventHandler() {
		public boolean handleEvent(ValidationEvent event) {
			System.err.println("MESSAGE:  " + event.getMessage());
			return true;
		}
	});
	marshaller.marshal(this, outputPath.toFile());
	return outputPath.toFile();
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
protected Unmarshaller createUnmarshaller() throws JAXBException, SAXException, FileNotFoundException,
    MalformedURLException {
    Unmarshaller unmarshaller = getContext().createUnmarshaller();
    if (schema != null) {
        unmarshaller.setSchema(cachedSchema);
        unmarshaller.setEventHandler(new ValidationEventHandler() {
            public boolean handleEvent(ValidationEvent event) {
                // stop unmarshalling if the event is an ERROR or FATAL
                // ERROR
                return event.getSeverity() == ValidationEvent.WARNING;
            }
        });
    }

    return unmarshaller;
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
/**
 * creates a unmarshaller on pooled JAXBContext instances.
 * @param jaxbContext the context on which to create a unmarshaller.
 * @param validationEventHandler validation event handler.
 * @return the unmarshaller.
 * @throws JAXBException when unable to create the unmarshaller.
 */
private static Unmarshaller getUnmarshaller(String jaxbContext, ValidationEventHandler validationEventHandler) throws JAXBException {
	JAXBContext context = null;
	synchronized (s_context) {
		context = s_context.get(jaxbContext);
		if (null == context) {
			context = JAXBContext.newInstance(jaxbContext);
			s_context.put(jaxbContext, context);
		}
	}
	Unmarshaller unmarshaller = null;
	synchronized (context) {
		unmarshaller = context.createUnmarshaller();
	}			
	unmarshaller.setEventHandler(validationEventHandler);
	return unmarshaller;
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public static void load() throws JAXBException {
	try {
		JAXBContext context = JAXBContext.newInstance(Settings.class);
		Unmarshaller um = context.createUnmarshaller();
		um.setEventHandler(new ValidationEventHandler() {

			public boolean handleEvent(ValidationEvent event) {

				log.warn("Problem on loading settings.xml: " + event.getMessage());
				return true;
			}
		});
		instance = (Settings) um.unmarshal(FILE);
		instance.wgsGrid.checkValues();
		instance.paperAtlas.checkValues();
		SETTINGS_LAST_MODIFIED = FILE.lastModified();

		// Settings 重新加載之後，必須更新語言資源
		I18nUtils.updateLocalizedStringFormSettings();

	} finally {
		Settings s = getInstance();
		s.applyProxySettings();
	}
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public ProcessModel unmarshalProcessModel(File procSchmInFile) throws JAXBException, PropertyException, FileNotFoundException,
		IOException {
	String pkgName = ProcessModel.class.getCanonicalName().toString();
	pkgName = pkgName.substring(0, pkgName.lastIndexOf('.'));
	JAXBContext jaxbCtx = JAXBContext.newInstance(pkgName);
	
	Unmarshaller unmarsh = jaxbCtx.createUnmarshaller();
	unmarsh.setEventHandler(
		    new ValidationEventHandler() {
		        public boolean handleEvent(ValidationEvent event) {
		            throw new RuntimeException(event.getMessage(),
		                                       event.getLinkedException());
		        }
		});
	ProcessModel proMod = (ProcessModel) unmarsh.unmarshal(procSchmInFile);
	
	MetaConstraintUtils.createHierarchicalLinks(proMod.getAllConstraints());
	
	return proMod;
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
/**
 * Converts the given xml into the corresponding T object.
 * 
 * @param xml
 * @param context
 * @param validationSchema
 * @param validationEventHandler
 * @return
 */
@SuppressWarnings("unchecked")
public static <T> T convertTo(byte[] xml, JAXBContext context, Schema validationSchema, ValidationEventHandler validationEventHandler)
{
	try (ByteArrayInputStream bis = new ByteArrayInputStream(xml);)
	{
		Unmarshaller unmarshaller = context.createUnmarshaller();
		if (validationSchema != null)
			unmarshaller.setSchema(validationSchema);
		if (validationEventHandler != null)
			unmarshaller.setEventHandler(validationEventHandler);
		return (T) unmarshaller.unmarshal(bis);
	}
	catch (JAXBException | IOException e)
	{
		LOG.error("Failed to unmarshall ", e);
		return null;
	}

}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
/**
 * Converts the given xml object into the corresponding a string
 * representation.
 * 
 * @param xmlObject
 * @param context
 * @param validationSchema
 * @param validationEventHandler
 * @return
 */
public static <T> String convertToString(T xmlObject, JAXBContext context, Schema validationSchema, ValidationEventHandler validationEventHandler)
{
	try (ByteArrayOutputStream baos = new ByteArrayOutputStream(1024))
	{
		Marshaller marshaller = context.createMarshaller();
		marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
		if (validationSchema != null)
			marshaller.setSchema(validationSchema);
		if (validationEventHandler != null)
			marshaller.setEventHandler(validationEventHandler);
		marshaller.marshal(xmlObject, baos);
		return baos.toString().replaceAll(XMLNS_REGEXP, "");// FIXME remove
															// xmlns attr

	}
	catch (JAXBException | IOException e)
	{
		LOG.error("Failed to unmarshall ", e);
		return null;
	}

}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
public void setProperty(String prop, Object value) {
    if (prop.equals(JAXBDataBinding.UNWRAP_JAXB_ELEMENT)) {
        unwrapJAXBElement = Boolean.TRUE.equals(value);
    } else if (prop.equals(org.apache.cxf.message.Message.class.getName())) {
        org.apache.cxf.message.Message m = (org.apache.cxf.message.Message)value;
        veventHandler = (ValidationEventHandler)m.getContextualProperty("jaxb-validation-event-handler");
        if (veventHandler == null) {
            veventHandler = databinding.getValidationEventHandler();
        }
        setEventHandler = MessageUtils.getContextualBoolean(m, "set-jaxb-validation-event-handler", true);
        
        Object unwrapProperty = m.get(JAXBDataBinding.UNWRAP_JAXB_ELEMENT);
        if (unwrapProperty == null) {
            unwrapProperty = m.getExchange().get(JAXBDataBinding.UNWRAP_JAXB_ELEMENT);
        }
        if (unwrapProperty != null) {
            unwrapJAXBElement = Boolean.TRUE.equals(unwrapProperty);
        }
    }
}
 

import javax.xml.bind.ValidationEventHandler; //導入依賴的package包/類
/**
 * Create an instance of {@link IValidationEventHandler} that invokes both
 * passed event handlers.
 *
 * @param aOne
 *        The first event handler. May be <code>null</code>.
 * @param aOther
 *        The second event handler. May be <code>null</code>.
 * @return Never <code>null</code>.
 * @since 8.6.0
 */
@Nonnull
static IValidationEventHandler and (@Nullable final ValidationEventHandler aOne,
                                    @Nullable final ValidationEventHandler aOther)
{
  if (aOne != null)
  {
    if (aOther != null)
      return x -> {
        if (!aOne.handleEvent (x))
        {
          // We should not continue
          return false;
        }
        return aOther.handleEvent (x);
      };
    return x -> aOne.handleEvent (x);
  }

  if (aOther != null)
    return x -> aOther.handleEvent (x);

  return x -> true;
}