/* * @(#)ListAttachmentsTag.java	1.4 07/07/06 * * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */package demo;import java.io.*;import java.util.*;import javax.mail.*;import javax.mail.internet.*;import javax.servlet.jsp.*;import javax.servlet.jsp.tagext.*;/** * Custom tag for listing message attachments. The scripting variable is only * within the body of the tag. */public class ListAttachmentsTag extends BodyTagSupport {    private String messageinfo;    private int partNum = 1;    private int numParts = 0;    private AttachmentInfo attachmentinfo;    private MessageInfo messageInfo;    private Multipart multipart;    /**     * messageinfo attribute getter method.     */    public String getMessageinfo() {        return messageinfo;    }        /**     * messageinfo attribute setter method.     */    public void setMessageinfo(String messageinfo) {        this.messageinfo = messageinfo;    }    /**     * Method for processing the start of the tag.     */    public int doStartTag() throws JspException {        messageInfo = (MessageInfo)pageContext.getAttribute(getMessageinfo());        attachmentinfo = new AttachmentInfo();                try {            multipart = (Multipart)messageInfo.getMessage().getContent();            numParts = multipart.getCount();        } catch (Exception ex) {            throw new JspException(ex.getMessage());        }        getPart();        return BodyTag.EVAL_BODY_TAG;    }       /**     * Method for processing the body content of the tag.     */    public int doAfterBody() throws JspException {                BodyContent body = getBodyContent();        try {            body.writeOut(getPreviousOut());        } catch (IOException e) {            throw new JspTagException("IterationTag: " + e.getMessage());        }                // clear up so the next time the body content is empty        body.clearBody();               partNum++;        if (partNum < numParts) {            getPart();            return BodyTag.EVAL_BODY_TAG;        } else {            return BodyTag.SKIP_BODY;        }    }        /**     * Helper method for retrieving message parts.     */    private void getPart() throws JspException {        try {            attachmentinfo.setPart(partNum, multipart.getBodyPart(partNum));            pageContext.setAttribute(getId(), attachmentinfo);        } catch (Exception ex) {            throw new JspException(ex.getMessage());        }    }}