Java DataSource類代碼示例

import javax.activation.DataSource; //導入依賴的package包/類
public static void setAttachment(Message message, String filename) throws MessagingException {
    // Create a multipar message
    Multipart multipart = new MimeMultipart();
    BodyPart messageBodyPart = new MimeBodyPart();

    //Set File
    DataSource source = new FileDataSource(filename);
    messageBodyPart.setDataHandler(new DataHandler(source));
    messageBodyPart.setFileName(filename);

    //Add "file part" to multipart
    multipart.addBodyPart(messageBodyPart);

    //Set multipart to message
    message.setContent(multipart);
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public DataSource viewAvatarById(Long accountId, int width, String tenantId)
        throws Exception {
    if (accountId == null) {
        logger.info("accountId cannot be null");

        return null;
    }

    String key = "accountId:" + accountId + ":" + width;
    String userId = Long.toString(accountId);
    DataSource dataSource = this.avatarCache.getDataSource(userId, width);

    if (dataSource != null) {
        return dataSource;
    }

    AccountInfo accountInfo = accountInfoManager.get(accountId);

    dataSource = this.viewAvatarByAccountInfo(accountInfo, width, tenantId);
    this.avatarCache.updateDataSource(userId, width, dataSource);

    return dataSource;
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public DataSource viewAvatarByUsername(String username, int width,
        String tenantId) throws Exception {
    // String key = "username:" + username + ":" + width;
    AccountInfo accountInfo = accountInfoManager.findUniqueBy("username",
            username);
    String userId = Long.toString(accountInfo.getId());
    DataSource dataSource = this.avatarCache.getDataSource(userId, width);

    if (dataSource != null) {
        return dataSource;
    }

    dataSource = this.viewAvatarByAccountInfo(accountInfo, width, tenantId);
    this.avatarCache.updateDataSource(userId, width, dataSource);

    return dataSource;
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public void updateDataSource(String userId, int width, DataSource dataSource) {
    try {
        String key = userId + ":" + width;
        byte[] bytes = IOUtils.toByteArray(dataSource.getInputStream());
        Set<String> aliasValue = this.aliasCache.get(userId);

        if (aliasValue == null) {
            aliasValue = new HashSet<String>();
            this.aliasCache.put(userId, aliasValue);
        }

        aliasValue.add(key);
        this.dataCache.put(key, bytes);
    } catch (Exception ex) {
        logger.error(ex.getMessage(), ex);
    }
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public StoreDTO saveStore(InputStream inputStream, String fileName,
        String contentType, String tenantId) throws Exception {
    int len = -1;
    byte[] b = new byte[1024];
    ByteArrayOutputStream baos2 = new ByteArrayOutputStream();

    while ((len = inputStream.read(b, 0, 1024)) != -1) {
        baos2.write(b, 0, len);
    }

    inputStream.close();

    byte[] bytes = baos2.toByteArray();
    DataSource dataSource = new ByteArrayDataSource(fileName, bytes);
    StoreDTO storeDto = storeService.saveStore(model, dataSource, tenantId);

    return storeDto;
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public StoreResult saveStore(String model, String key, DataSource dataSource)
        throws Exception {
    String path = key;
    File dir = new File(baseDir + "/" + model);
    dir.mkdirs();

    File targetFile = new File(baseDir + "/" + model + "/" + path);
    FileOutputStream fos = new FileOutputStream(targetFile);

    try {
        FileCopyUtils.copy(dataSource.getInputStream(), fos);
        fos.flush();
    } finally {
        fos.close();
    }

    StoreResult storeResult = new StoreResult();
    storeResult.setModel(model);
    storeResult.setKey(path);
    storeResult.setDataSource(new FileDataSource(targetFile));

    return storeResult;
}
 

import javax.activation.DataSource; //導入依賴的package包/類
/**
 * Create an Activation Framework DataSource for the given InputStreamSource.
 * @param inputStreamSource the InputStreamSource (typically a Spring Resource)
 * @param contentType the content type
 * @param name the name of the DataSource
 * @return the Activation Framework DataSource
 */
protected DataSource createDataSource(
	final InputStreamSource inputStreamSource, final String contentType, final String name) {

	return new DataSource() {
		@Override
		public InputStream getInputStream() throws IOException {
			return inputStreamSource.getInputStream();
		}
		@Override
		public OutputStream getOutputStream() {
			throw new UnsupportedOperationException("Read-only javax.activation.DataSource");
		}
		@Override
		public String getContentType() {
			return contentType;
		}
		@Override
		public String getName() {
			return name;
		}
	};
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public void addAttachment(final FormFile file) throws Exception {
	addAttachment(file.getFileName(), 
			new DataHandler(new DataSource() {
				@Override
				public OutputStream getOutputStream() throws IOException {
					throw new IOException("No output stream.");
				}
				
				@Override
				public String getName() {
					return file.getFileName();
				}
				
				@Override
				public InputStream getInputStream() throws IOException {
					return file.getInputStream();
				}
				
				@Override
				public String getContentType() {
					return file.getContentType();
				}
			}));
}
 

import javax.activation.DataSource; //導入依賴的package包/類
public static void eventUpdated(Event updatedEvent, String message, InternetAddress replyTo, DataSource attachment) throws Exception {
	if (ApplicationProperty.EmailConfirmationEvents.isFalse())
		return;

	Session session = updatedEvent.getSession();
	if (session == null)
		for (Meeting m: updatedEvent.getMeetings())
			if (m.getLocation() != null) { session = m.getLocation().getSession(); break; }
	EventInterface event = EventDetailBackend.getEventDetail(session, updatedEvent, null);
	
	ApproveEventRpcRequest request = new ApproveEventRpcRequest();
	request.setOperation(SaveOrApproveEventRpcRequest.Operation.UPDATE);
	if (message != null && !message.isEmpty())
		request.setMessage(message);
	request.setEmailConfirmation(true);
	request.setSessionId(session == null ? null : session.getUniqueId());
	request.setEvent(event);
	
	SaveOrApproveEventRpcResponse response = new SaveOrApproveEventRpcResponse();
	response.setEvent(event);
	
	new EventEmail(request, response, attachment, replyTo).send(null);
}
 

import javax.activation.DataSource; //導入依賴的package包/類
/**
 * Creates a new {@link Dispatch} stub that connects to the given pipe.
 *
 * @param portInfo
 *      see <a href="#param">common parameters</a>
 * @param owner
 *      see <a href="#param">common parameters</a>
 * @param binding
 *      see <a href="#param">common parameters</a>
 * @param clazz
 *      Type of the {@link Dispatch} to be created.
 *      See {@link Service#createDispatch(QName, Class, Service.Mode)}.
 * @param mode
 *      The mode of the dispatch.
 *      See {@link Service#createDispatch(QName, Class, Service.Mode)}.
 * @param epr
 *      see <a href="#param">common parameters</a>
 * TODO: are these parameters making sense?
 */
public static <T> Dispatch<T> createDispatch(WSPortInfo portInfo,
                                             WSService owner,
                                             WSBinding binding,
                                             Class<T> clazz, Service.Mode mode,
                                             @Nullable WSEndpointReference epr) {
    if (clazz == SOAPMessage.class) {
        return (Dispatch<T>) createSAAJDispatch(portInfo, binding, mode, epr);
    } else if (clazz == Source.class) {
        return (Dispatch<T>) createSourceDispatch(portInfo, binding, mode, epr);
    } else if (clazz == DataSource.class) {
        return (Dispatch<T>) createDataSourceDispatch(portInfo, binding, mode, epr);
    } else if (clazz == Message.class) {
        if(mode==Mode.MESSAGE)
            return (Dispatch<T>) createMessageDispatch(portInfo, binding, epr);
        else
            throw new WebServiceException(mode+" not supported with Dispatch<Message>");
    } else if (clazz == Packet.class) {
        if(mode==Mode.MESSAGE)
            return (Dispatch<T>) createPacketDispatch(portInfo, binding, epr);
        else
            throw new WebServiceException(mode+" not supported with Dispatch<Packet>");
    } else
        throw new WebServiceException("Unknown class type " + clazz.getName());
}
 

import javax.activation.DataSource; //導入依賴的package包/類
/**
 * Constructs a MimeMultipart object and its bodyparts from the
 * given DataSource. <p>
 *
 * This constructor handles as a special case the situation where the
 * given DataSource is a MultipartDataSource object.  In this case, this
 * method just invokes the superclass (i.e., Multipart) constructor
 * that takes a MultipartDataSource object. <p>
 *
 * Otherwise, the DataSource is assumed to provide a MIME multipart
 * byte stream.  The <code>parsed</code> flag is set to false.  When
 * the data for the body parts are needed, the parser extracts the
 * "boundary" parameter from the content type of this DataSource,
 * skips the 'preamble' and reads bytes till the terminating
 * boundary and creates MimeBodyParts for each part of the stream.
 *
 * @param   ct  content type.
 * @param   ds  DataSource, can be a MultipartDataSource.
 * @throws  MessagingException in case of error.
 */
public BMMimeMultipart(DataSource ds, ContentType ct)
        throws MessagingException {
    super(ds, ct);
    boundary = ct.getParameter("boundary");
    /*
if (ds instanceof MultipartDataSource) {
    // ask super to do this for us.
    setMultipartDataSource((MultipartDataSource)ds);
    return;
}

// 'ds' was not a MultipartDataSource, we have
// to parse this ourself.
parsed = false;
this.ds = ds;
    if (ct==null)
        contentType = new ContentType(ds.getContentType());
    else
        contentType = ct;
   */

}
 

import javax.activation.DataSource; //導入依賴的package包/類
private ContentType encode(MessageDataSource mds, OutputStream out) {
    try {
        final boolean isFastInfoset = XMLMessage.isFastInfoset(
                mds.getDataSource().getContentType());
        DataSource ds = transformDataSource(mds.getDataSource(),
                isFastInfoset, useFastInfosetForEncoding, features);

        InputStream is = ds.getInputStream();
        byte[] buf = new byte[1024];
        int count;
        while((count=is.read(buf)) != -1) {
            out.write(buf, 0, count);
        }
        return new ContentTypeImpl(ds.getContentType());
    } catch(IOException ioe) {
        throw new WebServiceException(ioe);
    }
}
 

import javax.activation.DataSource; //導入依賴的package包/類
DataHandler getDataHandler() {
    DataSource ds = new DataSource() {
        public OutputStream getOutputStream() throws IOException {
            throw new IOException("Illegal Operation");
        }

        public String getContentType() {
            return getContentTypeString();
        }

        public String getName() {
            return getContentId();
        }

        public InputStream getInputStream() throws IOException {
            return getContentAsStream();
        }
    };
    return new DataHandler(ds);
}
 

import javax.activation.DataSource; //導入依賴的package包/類
/**
 * Creates a new {@link Dispatch} stub that connects to the given pipe.
 *
 * @param portName
 *      see {@link Service#createDispatch(QName, Class, Service.Mode)}.
 * @param owner
 *      see <a href="#param">common parameters</a>
 * @param binding
 *      see <a href="#param">common parameters</a>
 * @param clazz
 *      Type of the {@link Dispatch} to be created.
 *      See {@link Service#createDispatch(QName, Class, Service.Mode)}.
 * @param mode
 *      The mode of the dispatch.
 *      See {@link Service#createDispatch(QName, Class, Service.Mode)}.
 * @param next
 *      see <a href="#param">common parameters</a>
 * @param epr
 *      see <a href="#param">common parameters</a>
 * TODO: are these parameters making sense?
 */
@SuppressWarnings("unchecked")
    public static <T> Dispatch<T> createDispatch(QName portName,
                                             WSService owner,
                                             WSBinding binding,
                                             Class<T> clazz, Service.Mode mode, Tube next,
                                             @Nullable WSEndpointReference epr) {
    if (clazz == SOAPMessage.class) {
        return (Dispatch<T>) createSAAJDispatch(portName, owner, binding, mode, next, epr);
    } else if (clazz == Source.class) {
        return (Dispatch<T>) createSourceDispatch(portName, owner, binding, mode, next, epr);
    } else if (clazz == DataSource.class) {
        return (Dispatch<T>) createDataSourceDispatch(portName, owner, binding, mode, next, epr);
    } else if (clazz == Message.class) {
        if(mode==Mode.MESSAGE)
            return (Dispatch<T>) createMessageDispatch(portName, owner, binding, next, epr);
        else
            throw new WebServiceException(mode+" not supported with Dispatch<Message>");
    } else if (clazz == Packet.class) {
        return (Dispatch<T>) createPacketDispatch(portName, owner, binding, next, epr);
    } else
        throw new WebServiceException("Unknown class type " + clazz.getName());
}
 

import javax.activation.DataSource; //導入依賴的package包/類
/**
 * Get the content-transfer-encoding that should be applied
 * to the input stream of this datasource, to make it mailsafe. <p>
 *
 * The algorithm used here is: <br>
 * <ul>
 * <li>
 * If the primary type of this datasource is "text" and if all
 * the bytes in its input stream are US-ASCII, then the encoding
 * is "7bit". If more than half of the bytes are non-US-ASCII, then
 * the encoding is "base64". If less than half of the bytes are
 * non-US-ASCII, then the encoding is "quoted-printable".
 * <li>
 * If the primary type of this datasource is not "text", then if
 * all the bytes of its input stream are US-ASCII, the encoding
 * is "7bit". If there is even one non-US-ASCII character, the
 * encoding is "base64".
 * </ul>
 *
 * @param   ds      DataSource
 * @return          the encoding. This is either "7bit",
 *                  "quoted-printable" or "base64"
 */
public static String getEncoding(DataSource ds) {
    ContentType cType = null;
    InputStream is = null;
    String encoding = null;

    try {
        cType = new ContentType(ds.getContentType());
        is = ds.getInputStream();
    } catch (Exception ex) {
        return "base64"; // what else ?!
    }

    boolean isText = cType.match("text/*");
    // if not text, stop processing when we see non-ASCII
    int i = checkAscii(is, ALL, !isText);
    switch (i) {
    case ALL_ASCII:
        encoding = "7bit"; // all ascii
        break;
    case MOSTLY_ASCII:
        encoding = "quoted-printable"; // mostly ascii
        break;
    default:
        encoding = "base64"; // mostly binary
        break;
    }

    // Close the input stream
    try {
        is.close();
    } catch (IOException ioex) { }

    return encoding;
}