MimePartDataSource (Java EE 5)

Java EE API

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javax.mail.internet Class MimePartDataSource

java.lang.Object
  extended by javax.mail.internet.MimePartDataSource
All Implemented Interfaces:
DataSource, MessageAware
public class MimePartDataSource
extends Object
implements DataSource, MessageAware

Implements: DataSource, MessageAware

实现 MimePart 中的 DataSource 的实用工具类。此类主要供服务提供者使用。
See also javax.mail.internet.MimePart, javax.activation.DataSource
英文文档：

A utility class that implements a DataSource out of a MimePart. This class is primarily meant for service providers.

Author:
John Mani
See Also:
MimePart, DataSource

Field Summary
protected  MimePart part
          The MimePart that provides the data for this DataSource.
 
Constructor Summary
MimePartDataSource(MimePart part)
          Constructor, that constructs a DataSource from a MimePart.
 
Method Summary
 String getContentType()
          Returns the content-type of this DataSource.
 InputStream getInputStream()
          Returns an input stream from this MimePart.
 MessageContext getMessageContext()
          Return the MessageContext for the current part.
 String getName()
          DataSource method to return a name.
 OutputStream getOutputStream()
          DataSource method to return an output stream.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

英文文档：

part 

protected MimePart part
The MimePart that provides the data for this DataSource.

Since:
JavaMail 1.4

Constructor Detail

public MimePartDataSource(MimePart part)
构造方法，根据 MimePart 构造 DataSource。
英文文档：

MimePartDataSource

public MimePartDataSource(MimePart part)
Constructor, that constructs a DataSource from a MimePart.

Method Detail

public java.io.InputStream getInputStream() throws java.io.IOException
返回此 MimePart 的输入流。

此方法根据此 MimePart 的 Content-Transfer-Encoding 属性的不同应用相应的传输编码。因此，返回的输入流是已解码的字节流。

此实现使用 getContentStream() 方法从 Part 中获取原始内容，并使用 MimeUtility.decode() 方法对它进行解码。

return 已解码的输入流
See also getContentStream, getContentStream, decode

英文文档：

getInputStream

public InputStream getInputStream()
                           throws IOException
Returns an input stream from this MimePart.

This method applies the appropriate transfer-decoding, based on the Content-Transfer-Encoding attribute of this MimePart. Thus the returned input stream is a decoded stream of bytes.

This implementation obtains the raw content from the Part using the getContentStream() method and decodes it using the MimeUtility.decode() method.

Specified by:
getInputStream in interface DataSource
Returns:
decoded input stream
Throws:
IOException
See Also:
MimeMessage.getContentStream(), MimeBodyPart.getContentStream(), MimeUtility.decode(java.io.InputStream, java.lang.String)

public java.io.OutputStream getOutputStream() throws java.io.IOException
返回输出流的 DataSource 方法。

此实现抛出 UnknownServiceException。

英文文档：

getOutputStream

public OutputStream getOutputStream()
                             throws IOException
DataSource method to return an output stream.

This implementation throws the UnknownServiceException.

Specified by:
getOutputStream in interface DataSource
Returns:
an OutputStream
Throws:
IOException

public String getContentType()
返回此 DataSource 的内容类型。

此实现仅对 MimePart 调用 getContentType 方法。

英文文档：

getContentType

public String getContentType()
Returns the content-type of this DataSource.

This implementation just invokes the getContentType method on the MimePart.

Specified by:
getContentType in interface DataSource
Returns:
the MIME Type

public String getName()
返回名称的 DataSource 方法。

此实现仅返回一个空字符串。

英文文档：

getName

public String getName()
DataSource method to return a name.

This implementation just returns an empty string.

Specified by:
getName in interface DataSource
Returns:
the name of the object.

public MessageContext getMessageContext()
返回当前部分的 MessageContext。
since
en
JavaMail 1.1
英文文档：

getMessageContext

public MessageContext getMessageContext()
Return the MessageContext for the current part.

Specified by:
getMessageContext in interface MessageAware
Since:
JavaMail 1.1
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Copyright 2007 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.

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