File	Doc	Category	Size	Date	Package
ByteArrayDataSource.java	API Doc	Glassfish v2 API	6369	Wed May 23 10:57:54 BST 2007	javax.mail.util

ByteArrayDataSource

• java.lang.Object

Fields Summary
private byte[]	data
private int	len
private String	type
private String	name

Constructors Summary
public ByteArrayDataSource(InputStream is, String type) Create a ByteArrayDataSource with data from the specified InputStream and with the specified MIME type. The InputStream is read completely and the data is stored in a byte array. param is the InputStream param type the MIME type exception IOException errors reading the stream DSByteArrayOutputStream os = new DSByteArrayOutputStream(); byte[] buf = new byte[8192]; int len; while ((len = is.read(buf)) > 0) os.write(buf, 0, len); this.data = os.getBuf(); this.len = os.getCount(); /* * ByteArrayOutputStream doubles the size of the buffer every time * it needs to expand, which can waste a lot of memory in the worst * case with large buffers. Check how much is wasted here and if * it's too much, copy the data into a new buffer and allow the * old buffer to be garbage collected. */ if (this.data.length - this.len > 256*1024) { this.data = os.toByteArray(); this.len = this.data.length; // should be the same } this.type = type;
public ByteArrayDataSource(byte[] data, String type) Create a ByteArrayDataSource with data from the specified byte array and with the specified MIME type. param data the data param type the MIME type this.data = data; this.type = type;
public ByteArrayDataSource(String data, String type) Create a ByteArrayDataSource with data from the specified String and with the specified MIME type. The MIME type should include a charset parameter specifying the charset to be used for the string. If the parameter is not included, the default charset is used. param data the String param type the MIME type exception IOException errors reading the String String charset = null; try { ContentType ct = new ContentType(type); charset = ct.getParameter("charset"); } catch (ParseException pex) { // ignore parse error } if (charset == null) charset = MimeUtility.getDefaultJavaCharset(); // XXX - could convert to bytes on demand rather than copying here this.data = data.getBytes(charset); this.type = type;

Methods Summary
public java.lang.String	getContentType() Get the MIME content type of the data. return the MIME type return type;
public java.io.InputStream	getInputStream() Return an InputStream for the data. Note that a new stream is returned each time this method is called. return the InputStream exception IOException if no data has been set if (data == null) throw new IOException("no data"); if (len < 0) len = data.length; return new SharedByteArrayInputStream(data, 0, len);
public java.lang.String	getName() Get the name of the data. By default, an empty string ("") is returned. return the name of this data return name;
public java.io.OutputStream	getOutputStream() Return an OutputStream for the data. Writing the data is not supported; an IOException is always thrown. exception IOException always throw new IOException("cannot do this");
public void	setName(java.lang.String name) Set the name of the data. param name the name of this data this.name = name;