Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package com.sun.xml.internal.org.jvnet.mimepull;

 import java.io.File;

 import java.io.InputStream;

 import java.nio.ByteBuffer;

 import java.util.List;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  * Represents an attachment part in a MIME message. MIME message parsing is done

  * lazily using a pull parser, so the part may not have all the data. {@link #read}

  * and {@link #readOnce} may trigger the actual parsing the message. In fact,

  * parsing of an attachment part may be triggered by calling {@link #read} methods

  * on some other attachment parts. All this happens behind the scenes so the

  * application developer need not worry about these details.

  *

  * @author Jitendra Kotamraju, Martin Grebac

  */

 public class MIMEPart {

     private static final Logger LOGGER = Logger.getLogger(MIMEPart.class.getName());

     private volatile InternetHeaders headers;

     private volatile String contentId;

     private String contentType;

     private String contentTransferEncoding;

     volatile boolean parsed;    // part is parsed or not

     final MIMEMessage msg;

     private final DataHead dataHead;

     MIMEPart(MIMEMessage msg) {

         this.msg = msg;

         this.dataHead = new DataHead(this);

     }

     MIMEPart(MIMEMessage msg, String contentId) {

         this(msg);

         this.contentId = contentId;

     }

     /**

      * Can get the attachment part's content multiple times. That means

      * the full content needs to be there in memory or on the file system.

      * Calling this method would trigger parsing for the part's data. So

      * do not call this unless it is required(otherwise, just wrap MIMEPart

      * into a object that returns InputStream for e.g DataHandler)

      *

      * @return data for the part's content

      */

     public InputStream read() {

         InputStream is = null;

         try {

             is = MimeUtility.decode(dataHead.read(), contentTransferEncoding);

         } catch (DecodingException ex) { //ignore

             if (LOGGER.isLoggable(Level.WARNING)) {

                 LOGGER.log(Level.WARNING, null, ex);

             }

         }

         return is;

     }

     /**

      * Cleans up any resources that are held by this part (for e.g. deletes

      * the temp file that is used to serve this part's content). After

      * calling this, one shouldn't call {@link #read()} or {@link #readOnce()}

      */

     public void close() {

         dataHead.close();

     }

     /**

      * Can get the attachment part's content only once. The content

      * will be lost after the method. Content data is not be stored

      * on the file system or is not kept in the memory for the

      * following case:

      *   - Attachement parts contents are accessed sequentially

      *

      * In general, take advantage of this when the data is used only

      * once.

      *

      * @return data for the part's content

      */

     public InputStream readOnce() {

         InputStream is = null;

         try {

             is = MimeUtility.decode(dataHead.readOnce(), contentTransferEncoding);

         } catch (DecodingException ex) { //ignore

             if (LOGGER.isLoggable(Level.WARNING)) {

                 LOGGER.log(Level.WARNING, null, ex);

             }

         }

         return is;

     }

     public void moveTo(File f) {

         dataHead.moveTo(f);

     }

     /**

      * Returns Content-ID MIME header for this attachment part

      *

      * @return Content-ID of the part

      */

     public String getContentId() {

         if (contentId == null) {

             getHeaders();

         }

         return contentId;

     }

     /**

      * Returns Content-Transfer-Encoding MIME header for this attachment part

      *

      * @return Content-Transfer-Encoding of the part

      */

     public String getContentTransferEncoding() {

         if (contentTransferEncoding == null) {

             getHeaders();

         }

         return contentTransferEncoding;

     }

     /**

      * Returns Content-Type MIME header for this attachment part

      *

      * @return Content-Type of the part

      */

     public String getContentType() {

         if (contentType == null) {

             getHeaders();

         }

         return contentType;

     }

     private void getHeaders() {

         // Trigger parsing for the part headers

         while(headers == null) {

             if (!msg.makeProgress()) {

                 if (headers == null) {

                     throw new IllegalStateException("Internal Error. Didn't get Headers even after complete parsing.");

                 }

             }

         }

     }

     /**

      * Return all the values for the specified header.

      * Returns <code>null</code> if no headers with the

      * specified name exist.

      *

      * @param   name header name

      * @return  list of header values, or null if none

      */

     public List<String> getHeader(String name) {

         getHeaders();

         assert headers != null;

         return headers.getHeader(name);

     }

     /**

      * Return all the headers

      *

      * @return list of Header objects

      */

     public List<? extends Header> getAllHeaders() {

         getHeaders();

         assert headers != null;

         return headers.getAllHeaders();

     }

     /**

      * Callback to set headers

      *

      * @param headers MIME headers for the part

      */

     void setHeaders(InternetHeaders headers) {

         this.headers = headers;

         List<String> ct = getHeader("Content-Type");

         this.contentType = (ct == null) ? "application/octet-stream" : ct.get(0);

         List<String> cte = getHeader("Content-Transfer-Encoding");

         this.contentTransferEncoding = (cte == null) ? "binary" : cte.get(0);

     }

     /**

      * Callback to notify that there is a partial content for the part

      *

      * @param buf content data for the part

      */

     void addBody(ByteBuffer buf) {

         dataHead.addBody(buf);

     }

     /**

      * Callback to indicate that parsing is done for this part

      * (no more update events for this part)

      */

     void doneParsing() {

         parsed = true;

         dataHead.doneParsing();

     }

     /**

      * Callback to set Content-ID for this part

      * @param cid Content-ID of the part

      */

     void setContentId(String cid) {

         this.contentId = cid;

     }

     /**

      * Callback to set Content-Transfer-Encoding for this part

      * @param cte Content-Transfer-Encoding of the part

      */

     void setContentTransferEncoding(String cte) {

         this.contentTransferEncoding = cte;

     }

     @Override

     public String toString() {

         return "Part="+contentId+":"+contentTransferEncoding;

     }

 }