javax.servlet.http.Part Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.servlet.http;
import java.io.*;
import java.util.*;
/**
* 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 the name of the file to which the stream will be
* written. 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);
/**
* Gets the values of the Part header with the given name.
*
*
Any changes to the returned Collection must not
* affect this Part.
*
*
Part header names are case insensitive.
*
* @param name the header name whose values to return
*
* @return a (possibly empty) Collection of the values of
* the header with the given name
*/
public Collection getHeaders(String name);
/**
* Gets the header names of this Part.
*
* Some servlet containers do not allow
* servlets to access headers using this method, in
* which case this method returns null
*
*
Any changes to the returned Collection must not
* affect this Part.
*
* @return a (possibly empty) Collection of the header
* names of this Part
*/
public Collection getHeaderNames();
}