javax.servlet.http.Part Maven / Gradle / Ivy
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package javax.servlet.http;
import java.io.InputStream;
import java.io.IOException;
/**
* This class represents a part or form item that was received within a
* multipart/form-data POST request.
*
* @since Servlet 3.0
*/
public interface Part {
/**
* Gets the content of this part as an InputStream
*
* @return The content of this part as an InputStream
* @throws IOException If an error occurs in retrieving the contet
* as an InputStream
*/
public InputStream getInputStream() throws IOException;
/**
* Gets the content type of this part.
*
* @return The content type of this part.
*/
public String getContentType();
/**
* Gets the name of this part
*
* @return The name of this part as a String
*/
public String getName();
/**
* Returns the size of this fille.
*
* @return a long specifying the size of this part, in bytes.
*/
public long getSize();
/**
* A convenience method to write this uploaded item to disk.
*
* This method is not guaranteed to succeed if called more than once for
* the same part. This allows a particular implementation to use, for
* example, file renaming, where possible, rather than copying all of the
* underlying data, thus gaining a significant performance benefit.
*
* @param fileName aString specifying the file name which the stream is written out to.
* The file is created relative to the location as specified in the MultipartConfig
*
* @throws IOException if an error occurs.
*/
public void write(String fileName) throws IOException;
/**
* Deletes the underlying storage for a file item, including deleting any
* associated temporary disk file.
*
* @throws IOException if an error occurs.
*/
public void delete() throws IOException;
/**
*
* Returns the value of the specified mime header
* as a String. If the Part did not include a header
* of the specified name, this method returns null.
* If there are multiple headers with the same name, this method
* returns the first header in the part.
* The header name is case insensitive. You can use
* this method with any request header.
*
* @param name a String specifying the
* header name
*
* @return a String containing the
* value of the requested
* header, or null
* if the part does not
* have a header of that name
*
*/
public String getHeader(String name);
/**
*
* Returns all the values of the specified Part header
* as an Iterable of String objects.
*
*
If the Part did not include any headers
* of the specified name, this method returns an empty
* Iterable.
* The header name is case insensitive. You can use
* this method with any Part header.
*
* @param name a String specifying the
* header name
*
* @return an Iterable containing
* the values of the requested header. If
* the Part does not have any headers of
* that name return an empty
* Iterable. If
* the container does not allow access to
* header information, return null
*
*/
public Iterable getHeaders(String name);
/**
*
* Returns an Iterable of all the header names
* this part contains. If the part has no
* headers, this method returns an empty Iterable.
*
* Some servlet containers do not allow
* servlets to access headers using this method, in
* which case this method returns null
*
* @return an Iterable of all the
* header names sent with this
* part; if the part has
* no headers, an empty Iterable;
* if the servlet container does not
* allow servlets to use this method,
* null
*
*
*/
public Iterable getHeaderNames();
}