javax.mail.Multipart Maven / Gradle / Ivy
Show all versions of aem-sdk-api Show documentation
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2017 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://oss.oracle.com/licenses/CDDL+GPL-1.1
* or 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 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.mail;
import java.util.Vector;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import javax.activation.DataSource;
/**
* Multipart is a container that holds multiple body parts. Multipart
* provides methods to retrieve and set its subparts.
*
* Multipart also acts as the base class for the content object returned
* by most Multipart DataContentHandlers. For example, invoking getContent()
* on a DataHandler whose source is a "multipart/signed" data source may
* return an appropriate subclass of Multipart.
*
* Some messaging systems provide different subtypes of Multiparts. For
* example, MIME specifies a set of subtypes that include "alternative",
* "mixed", "related", "parallel", "signed", etc.
*
* Multipart is an abstract class. Subclasses provide actual implementations.
*
* @author John Mani
*/
public abstract class Multipart {
/**
* Vector of BodyPart objects.
*/
protected Vector parts = new Vector<>(); // Holds BodyParts
/**
* This field specifies the content-type of this multipart
* object. It defaults to "multipart/mixed".
*/
protected String contentType = "multipart/mixed"; // Content-Type
/**
* The Part containing this Multipart,
* if known.
* @since JavaMail 1.1
*/
protected Part parent;
/**
* Default constructor. An empty Multipart object is created.
*/
protected Multipart() { }
/**
* Setup this Multipart object from the given MultipartDataSource.
*
* The method adds the MultipartDataSource's BodyPart
* objects into this Multipart. This Multipart's contentType is
* set to that of the MultipartDataSource.
*
* This method is typically used in those cases where one
* has a multipart data source that has already been pre-parsed into
* the individual body parts (for example, an IMAP datasource), but
* needs to create an appropriate Multipart subclass that represents
* a specific multipart subtype.
*
* @param mp Multipart datasource
* @exception MessagingException for failures
*/
protected synchronized void setMultipartDataSource(MultipartDataSource mp)
throws MessagingException {
contentType = mp.getContentType();
int count = mp.getCount();
for (int i = 0; i < count; i++)
addBodyPart(mp.getBodyPart(i));
}
/**
* Return the content-type of this Multipart.
*
* This implementation just returns the value of the
* contentType field.
*
* @return content-type
* @see #contentType
*/
public synchronized String getContentType() {
return contentType;
}
/**
* Return the number of enclosed BodyPart objects.
*
* @return number of parts
* @exception MessagingException for failures
* @see #parts
*/
public synchronized int getCount() throws MessagingException {
if (parts == null)
return 0;
return parts.size();
}
/**
* Get the specified Part. Parts are numbered starting at 0.
*
* @param index the index of the desired Part
* @return the Part
* @exception IndexOutOfBoundsException if the given index
* is out of range.
* @exception MessagingException for other failures
*/
public synchronized BodyPart getBodyPart(int index)
throws MessagingException {
if (parts == null)
throw new IndexOutOfBoundsException("No such BodyPart");
return parts.elementAt(index);
}
/**
* Remove the specified part from the multipart message.
* Shifts all the parts after the removed part down one.
*
* @param part The part to remove
* @return true if part removed, false otherwise
* @exception MessagingException if no such Part exists
* @exception IllegalWriteException if the underlying
* implementation does not support modification
* of existing values
*/
public synchronized boolean removeBodyPart(BodyPart part)
throws MessagingException {
if (parts == null)
throw new MessagingException("No such body part");
boolean ret = parts.removeElement(part);
part.setParent(null);
return ret;
}
/**
* Remove the part at specified location (starting from 0).
* Shifts all the parts after the removed part down one.
*
* @param index Index of the part to remove
* @exception IndexOutOfBoundsException if the given index
* is out of range.
* @exception IllegalWriteException if the underlying
* implementation does not support modification
* of existing values
* @exception MessagingException for other failures
*/
public synchronized void removeBodyPart(int index)
throws MessagingException {
if (parts == null)
throw new IndexOutOfBoundsException("No such BodyPart");
BodyPart part = parts.elementAt(index);
parts.removeElementAt(index);
part.setParent(null);
}
/**
* Adds a Part to the multipart. The BodyPart is appended to
* the list of existing Parts.
*
* @param part The Part to be appended
* @exception IllegalWriteException if the underlying
* implementation does not support modification
* of existing values
* @exception MessagingException for other failures
*/
public synchronized void addBodyPart(BodyPart part)
throws MessagingException {
if (parts == null)
parts = new Vector<>();
parts.addElement(part);
part.setParent(this);
}
/**
* Adds a BodyPart at position index.
* If index is not the last one in the list,
* the subsequent parts are shifted up. If index
* is larger than the number of parts present, the
* BodyPart is appended to the end.
*
* @param part The BodyPart to be inserted
* @param index Location where to insert the part
* @exception IllegalWriteException if the underlying
* implementation does not support modification
* of existing values
* @exception MessagingException for other failures
*/
public synchronized void addBodyPart(BodyPart part, int index)
throws MessagingException {
if (parts == null)
parts = new Vector<>();
parts.insertElementAt(part, index);
part.setParent(this);
}
/**
* Output an appropriately encoded bytestream to the given
* OutputStream. The implementation subclass decides the
* appropriate encoding algorithm to be used. The bytestream
* is typically used for sending.
*
* @param os the stream to write to
* @exception IOException if an IO related exception occurs
* @exception MessagingException for other failures
*/
public abstract void writeTo(OutputStream os)
throws IOException, MessagingException;
/**
* Return the Part that contains this Multipart
* object, or null if not known.
*
* @return the parent Part
* @since JavaMail 1.1
*/
public synchronized Part getParent() {
return parent;
}
/**
* Set the parent of this Multipart to be the specified
* Part. Normally called by the Message
* or BodyPart setContent(Multipart) method.
* parent may be null if the
* Multipart is being removed from its containing
* Part.
*
* @param parent the parent Part
* @since JavaMail 1.1
*/
public synchronized void setParent(Part parent) {
this.parent = parent;
}
}