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Commons Email example source code file (MultiPartEmail.java)

This example Commons Email source code file (MultiPartEmail.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Email tags/keywords

bodypart, bodypart, datasource, email, emailexception, emailexception, invalid, io, ioexception, messagingexception, messagingexception, mimemultipart, multipartemail, net, network, string, string

The Commons Email MultiPartEmail.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.mail;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.URLDataSource;
import javax.mail.BodyPart;
import javax.mail.MessagingException;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimePart;

/**
 * A multipart email.
 *
 * <p>This class is used to send multi-part internet email like
 * messages with attachments.
 *
 * <p>To create a multi-part email, call the default constructor and
 * then you can call setMsg() to set the message and call the
 * different attach() methods.
 *
 * @since 1.0
 * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs
 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens
 * @author <a href="mailto:frank.kim@clearink.com">Frank Y. Kim
 * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin
 * @author <a href="mailto:unknown">Regis Koenig
 * @author <a href="mailto:corey.scott@gmail.com">Corey Scott
 * @version $Id: MultiPartEmail.java 741633 2009-02-06 17:02:44Z sgoeschl $
 */
public class MultiPartEmail extends Email
{
    /** Body portion of the email. */
    private MimeMultipart container;

    /** The message container. */
    private BodyPart primaryBodyPart;

    /** The MIME subtype. */
    private String subType;

    /** Indicates if the message has been initialized */
    private boolean initialized;

    /** Indicates if attachments have been added to the message */
    private boolean boolHasAttachments;

    /**
     * Set the MIME subtype of the email.
     *
     * @param aSubType MIME subtype of the email
     * @since 1.0
     */
    public void setSubType(String aSubType)
    {
        this.subType = aSubType;
    }

    /**
     * Get the MIME subtype of the email.
     *
     * @return MIME subtype of the email
     * @since 1.0
     */
    public String getSubType()
    {
        return subType;
    }

    /**
     * Add a new part to the email.
     *
     * @param partContent The content.
     * @param partContentType The content type.
     * @return An Email.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public Email addPart(String partContent, String partContentType)
        throws EmailException
    {
            BodyPart bodyPart = createBodyPart();
        try
        {
            bodyPart.setContent(partContent, partContentType);
            getContainer().addBodyPart(bodyPart);
        }
        catch (MessagingException me)
        {
            throw new EmailException(me);
        }

        return this;
    }

    /**
     * Add a new part to the email.
     *
     * @param multipart The MimeMultipart.
     * @return An Email.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     *  @since 1.0
     */
    public Email addPart(MimeMultipart multipart) throws EmailException
    {
        try
        {
            return addPart(multipart, getContainer().getCount());
        }
        catch (MessagingException me)
        {
            throw new EmailException(me);
        }
    }

    /**
     * Add a new part to the email.
     *
     * @param multipart The part to add.
     * @param index The index to add at.
     * @return The email.
     * @throws EmailException An error occured while adding the part.
     * @since 1.0
     */
    public Email addPart(MimeMultipart multipart, int index) throws EmailException
    {
            BodyPart bodyPart = createBodyPart();
        try
        {
            bodyPart.setContent(multipart);
            getContainer().addBodyPart(bodyPart, index);
        }
        catch (MessagingException me)
        {
            throw new EmailException(me);
        }

        return this;
    }

    /**
     * Initialize the multipart email.
     * @since 1.0
     */
    protected void init()
    {
        if (initialized)
        {
            throw new IllegalStateException("Already initialized");
        }

        container = createMimeMultipart();
        super.setContent(container);

        initialized = true;
    }

    /**
     * Set the message of the email.
     *
     * @param msg A String.
     * @return An Email.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public Email setMsg(String msg) throws EmailException
    {
        // throw exception on null message
        if (EmailUtils.isEmpty(msg))
        {
            throw new EmailException("Invalid message supplied");
        }
        try
        {
            BodyPart primary = getPrimaryBodyPart();

            if ((primary instanceof MimePart) && EmailUtils.isNotEmpty(charset))
            {
                ((MimePart) primary).setText(msg, charset);
            }
            else
            {
                primary.setText(msg);
            }
        }
        catch (MessagingException me)
        {
            throw new EmailException(me);
        }
        return this;
    }

    /**
     * Builds the actual MimeMessage
     *
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public void buildMimeMessage() throws EmailException
    {
        try
        {
            if (primaryBodyPart != null)
            {
                // before a multipart message can be sent, we must make sure that
                // the content for the main body part was actually set.  If not,
                // an IOException will be thrown during super.send().

                BodyPart body = this.getPrimaryBodyPart();
                try
                {
                    body.getContent();
                }
                catch (IOException e)
                {
                    // do nothing here.  content will be set to an empty string
                    // as a result.
                    // (Should this really be rethrown as an email exception?)
                    // throw new EmailException(e);
                }
            }

            if (subType != null)
            {
                getContainer().setSubType(subType);
            }

            super.buildMimeMessage();
        }
        catch (MessagingException me)
        {
            throw new EmailException(me);
        }
    }

    /**
     * Attach an EmailAttachment.
     *
     * @param attachment An EmailAttachment.
     * @return A MultiPartEmail.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public MultiPartEmail attach(EmailAttachment attachment)
        throws EmailException
    {
        MultiPartEmail result = null;

        if (attachment == null)
        {
            throw new EmailException("Invalid attachment supplied");
        }

        URL url = attachment.getURL();

        if (url == null)
        {
            String fileName = null;
            try
            {
                fileName = attachment.getPath();
                File file = new File(fileName);
                if (!file.exists())
                {
                    throw new IOException(
                        "\"" + fileName + "\" does not exist");
                }
                result =
                    attach(
                        new FileDataSource(file),
                        attachment.getName(),
                        attachment.getDescription(),
                        attachment.getDisposition());
            }
            catch (IOException e)
            {
                throw new EmailException(
                    "Cannot attach file \"" + fileName + "\"",
                    e);
            }
        }
        else
        {
            result =
                attach(
                    url,
                    attachment.getName(),
                    attachment.getDescription(),
                    attachment.getDisposition());
        }

        return result;
    }

    /**
     * Attach a file located by its URL.  The disposition of the file
     * is set to mixed.
     *
     * @param url The URL of the file (may be any valid URL).
     * @param name The name field for the attachment.
     * @param description A description for the attachment.
     * @return A MultiPartEmail.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public MultiPartEmail attach(URL url, String name, String description)
        throws EmailException
    {
        return attach(url, name, description, EmailAttachment.ATTACHMENT);
    }

    /**
     * Attach a file located by its URL.
     *
     * @param url The URL of the file (may be any valid URL).
     * @param name The name field for the attachment.
     * @param description A description for the attachment.
     * @param disposition Either mixed or inline.
     * @return A MultiPartEmail.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public MultiPartEmail attach(
        URL url,
        String name,
        String description,
        String disposition)
        throws EmailException
    {
        // verify that the URL is valid
       try
       {
           InputStream is = url.openStream();
           is.close();
       }
       catch (IOException e)
       {
           throw new EmailException("Invalid URL set:" + url, e);
       }

       return attach(new URLDataSource(url), name, description, disposition);
    }

    /**
     * Attach a file specified as a DataSource interface.
     *
     * @param ds A DataSource interface for the file.
     * @param name The name field for the attachment.
     * @param description A description for the attachment.
     * @return A MultiPartEmail.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public MultiPartEmail attach(
        DataSource ds,
        String name,
        String description)
        throws EmailException
    {
        // verify that the DataSource is valid
        try
        {
            if (ds == null || ds.getInputStream() == null)
            {
                throw new EmailException("Invalid Datasource");
            }
        }
        catch (IOException e)
        {
            throw new EmailException("Invalid Datasource", e);
        }

        return attach(ds, name, description, EmailAttachment.ATTACHMENT);
    }

    /**
     * Attach a file specified as a DataSource interface.
     *
     * @param ds A DataSource interface for the file.
     * @param name The name field for the attachment.
     * @param description A description for the attachment.
     * @param disposition Either mixed or inline.
     * @return A MultiPartEmail.
     * @throws EmailException see javax.mail.internet.MimeBodyPart
     *  for definitions
     * @since 1.0
     */
    public MultiPartEmail attach(
        DataSource ds,
        String name,
        String description,
        String disposition)
        throws EmailException
    {
        if (EmailUtils.isEmpty(name))
        {
            name = ds.getName();
        }
        BodyPart bodyPart = createBodyPart();
        try
        {
            getContainer().addBodyPart(bodyPart);

            bodyPart.setDisposition(disposition);
            bodyPart.setFileName(name);
            bodyPart.setDescription(description);
            bodyPart.setDataHandler(new DataHandler(ds));
        }
        catch (MessagingException me)
        {
            throw new EmailException(me);
        }
        setBoolHasAttachments(true);

        return this;
    }

    /**
     * Gets first body part of the message.
     *
     * @return The primary body part.
     * @throws MessagingException An error occured while getting the primary body part.
     * @since 1.0
     */
    protected BodyPart getPrimaryBodyPart() throws MessagingException
    {
        if (!initialized)
        {
            init();
        }

        // Add the first body part to the message.  The fist body part must be
        if (this.primaryBodyPart == null)
        {
            primaryBodyPart = createBodyPart();
            getContainer().addBodyPart(primaryBodyPart, 0);
        }

        return primaryBodyPart;
    }

    /**
     * Gets the message container.
     *
     * @return The message container.
     * @since 1.0
     */
    protected MimeMultipart getContainer()
    {
        if (!initialized)
        {
            init();
        }
        return container;
    }

    /**
     * Creates a body part object.
     * Can be overridden if you don't want to create a BodyPart.
     *
     * @return the created body part
     */
    protected BodyPart createBodyPart()
    {
        BodyPart bodyPart = new MimeBodyPart();
        return bodyPart;
    }
    /**
     * Creates a mime multipart object.
     *
     * @return the created mime part
     */
    protected MimeMultipart createMimeMultipart()
    {
        MimeMultipart mmp = new MimeMultipart();
        return mmp;
    }

    /**
     * Checks whether there are attachments.
     *
     * @return true if there are attachments
     * @since 1.0
     */
    public boolean isBoolHasAttachments()
    {
        return boolHasAttachments;
    }

    /**
     * Sets whether there are attachments.
     *
     * @param b  the attachments flag
     * @since 1.0
     */
    public void setBoolHasAttachments(boolean b)
    {
        boolHasAttachments = b;
    }

    /**
     * Checks if this object is initialized.
     *
     * @return true if initialized
     */
    protected boolean isInitialized()
    {
        return initialized;
    }

    /**
     * Sets the initialized status of this object.
     *
     * @param b  the initialized status flag
     */
    protected void setInitialized(boolean b)
    {
        initialized = b;
    }

}

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