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package javax.mail.internet;

import javax.mail.*;
import java.io.*;
import java.util.Enumeration;

/**
 * The MimePart interface models an Entity as defined
 * by MIME (RFC2045, Section 2.4). 

* * MimePart extends the Part interface to add additional RFC822 and MIME * specific semantics and attributes. It provides the base interface for * the MimeMessage and MimeBodyPart classes * *


A note on RFC822 and MIME headers

* * RFC822 and MIME header fields must contain only * US-ASCII characters. If a header contains non US-ASCII characters, * it must be encoded as per the rules in RFC 2047. The MimeUtility * class provided in this package can be used to to achieve this. * Callers of the setHeader, addHeader, and * addHeaderLine methods are responsible for enforcing * the MIME requirements for the specified headers. In addition, these * header fields must be folded (wrapped) before being sent if they * exceed the line length limitation for the transport (1000 bytes for * SMTP). Received headers may have been folded. The application is * responsible for folding and unfolding headers as appropriate.

* * @see MimeUtility * @see javax.mail.Part * @author John Mani */ public interface MimePart extends Part { /** * Get the values of all header fields available for this header, * returned as a single String, with the values separated by the * delimiter. If the delimiter is null, only the * first value is returned. * * @param name the name of this header * @param delimiter delimiter between fields in returned string * @return the value fields for all headers with * this name * @exception MessagingException for failures */ public String getHeader(String name, String delimiter) throws MessagingException; /** * Add a raw RFC822 header-line. * * @param line the line to add * @exception IllegalWriteException if the underlying * implementation does not support modification * @exception IllegalStateException if this Part is * obtained from a READ_ONLY folder * @exception MessagingException for other failures */ public void addHeaderLine(String line) throws MessagingException; /** * Get all header lines as an Enumeration of Strings. A Header * line is a raw RFC822 header-line, containing both the "name" * and "value" field. * * @return an Enumeration of Strings * @exception MessagingException for failures */ @SuppressWarnings("rawtypes") public Enumeration getAllHeaderLines() throws MessagingException; /** * Get matching header lines as an Enumeration of Strings. * A Header line is a raw RFC822 header-line, containing both * the "name" and "value" field. * * @param names the headers to return * @return an Enumeration of Strings * @exception MessagingException for failures */ @SuppressWarnings("rawtypes") public Enumeration getMatchingHeaderLines(String[] names) throws MessagingException; /** * Get non-matching header lines as an Enumeration of Strings. * A Header line is a raw RFC822 header-line, containing both * the "name" and "value" field. * * @param names the headers to not return * @return an Enumeration of Strings * @exception MessagingException for failures */ @SuppressWarnings("rawtypes") public Enumeration getNonMatchingHeaderLines(String[] names) throws MessagingException; /** * Get the transfer encoding of this part. * * @return content-transfer-encoding * @exception MessagingException for failures */ public String getEncoding() throws MessagingException; /** * Get the Content-ID of this part. Returns null if none present. * * @return content-ID * @exception MessagingException for failures */ public String getContentID() throws MessagingException; /** * Get the Content-MD5 digest of this part. Returns null if * none present. * * @return content-MD5 * @exception MessagingException for failures */ public String getContentMD5() throws MessagingException; /** * Set the Content-MD5 of this part. * * @param md5 the MD5 value * @exception IllegalWriteException if the underlying * implementation does not support modification * @exception IllegalStateException if this Part is * obtained from a READ_ONLY folder */ public void setContentMD5(String md5) throws MessagingException; /** * Get the language tags specified in the Content-Language header * of this MimePart. The Content-Language header is defined by * RFC 1766. Returns null if this header is not * available. * * @return array of content language strings * @exception MessagingException for failures */ public String[] getContentLanguage() throws MessagingException; /** * Set the Content-Language header of this MimePart. The * Content-Language header is defined by RFC1766. * * @param languages array of language tags * @exception IllegalWriteException if the underlying * implementation does not support modification * @exception IllegalStateException if this Part is * obtained from a READ_ONLY folder */ public void setContentLanguage(String[] languages) throws MessagingException; /** * Convenience method that sets the given String as this * part's content, with a MIME type of "text/plain". If the * string contains non US-ASCII characters. it will be encoded * using the platform's default charset. The charset is also * used to set the "charset" parameter.

* * Note that there may be a performance penalty if * text is large, since this method may have * to scan all the characters to determine what charset to * use.

* * If the charset is already known, use the * setText method that takes the charset parameter. * * @param text the text content to set * @exception MessagingException if an error occurs * @see #setText(String text, String charset) */ public void setText(String text) throws MessagingException; /** * Convenience method that sets the given String as this part's * content, with a MIME type of "text/plain" and the specified * charset. The given Unicode string will be charset-encoded * using the specified charset. The charset is also used to set * "charset" parameter. * * @param text the text content to set * @param charset the charset to use for the text * @exception MessagingException if an error occurs */ public void setText(String text, String charset) throws MessagingException; /** * Convenience method that sets the given String as this part's * content, with a primary MIME type of "text" and the specified * MIME subtype. The given Unicode string will be charset-encoded * using the specified charset. The charset is also used to set * the "charset" parameter. * * @param text the text content to set * @param charset the charset to use for the text * @param subtype the MIME subtype to use (e.g., "html") * @exception MessagingException if an error occurs * @since JavaMail 1.4 */ public void setText(String text, String charset, String subtype) throws MessagingException; }





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