jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/MIMEPart.java@f50545b5e2f1

     1 /*

     2  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

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

    28 import java.io.File;

    29 import java.io.InputStream;

    30 import java.nio.ByteBuffer;

    31 import java.util.List;

    33 /**

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

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

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

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

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

    39  * application developer need not worry about these details.

    40  *

    41  * @author Jitendra Kotamraju

    42  */

    43 public class MIMEPart {

    45     private volatile InternetHeaders headers;

    46     private volatile String contentId;

    47     private String contentType;

    48     volatile boolean parsed;    // part is parsed or not

    49     final MIMEMessage msg;

    50     private final DataHead dataHead;

    52     MIMEPart(MIMEMessage msg) {

    53         this.msg = msg;

    54         this.dataHead = new DataHead(this);

    55     }

    57     MIMEPart(MIMEMessage msg, String contentId) {

    58         this(msg);

    59         this.contentId = contentId;

    60     }

    62     /**

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

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

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

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

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

    68      *

    69      * @return data for the part's content

    70      */

    71     public InputStream read() {

    72         return dataHead.read();

    73     }

    75     /**

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

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

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

    79      */

    80     public void close() {

    81         dataHead.close();

    82     }

    85     /**

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

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

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

    89      * following case:

    90      *   - Attachement parts contents are accessed sequentially

    91      *

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

    93      * once.

    94      *

    95      * @return data for the part's content

    96      */

    97     public InputStream readOnce() {

    98         return dataHead.readOnce();

    99     }

   101     public void moveTo(File f) {

   102         dataHead.moveTo(f);

   103     }

   105     /**

   106      * Returns Content-ID MIME header for this attachment part

   107      *

   108      * @return Content-ID of the part

   109      */

   110     public String getContentId() {

   111         if (contentId == null) {

   112             getHeaders();

   113         }

   114         return contentId;

   115     }

   117     /**

   118      * Returns Content-Type MIME header for this attachment part

   119      *

   120      * @return Content-Type of the part

   121      */

   122     public String getContentType() {

   123         if (contentType == null) {

   124             getHeaders();

   125         }

   126         return contentType;

   127     }

   129     private void getHeaders() {

   130         // Trigger parsing for the part headers

   131         while(headers == null) {

   132             if (!msg.makeProgress()) {

   133                 if (headers == null) {

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

   135                 }

   136             }

   137         }

   138     }

   140     /**

   141      * Return all the values for the specified header.

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

   143      * specified name exist.

   144      *

   145      * @param   name header name

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

   147      */

   148     public List<String> getHeader(String name) {

   149         getHeaders();

   150         assert headers != null;

   151         return headers.getHeader(name);

   152     }

   154     /**

   155      * Return all the headers

   156      *

   157      * @return list of Header objects

   158      */

   159     public List<? extends Header> getAllHeaders() {

   160         getHeaders();

   161         assert headers != null;

   162         return headers.getAllHeaders();

   163     }

   165     /**

   166      * Callback to set headers

   167      *

   168      * @param headers MIME headers for the part

   169      */

   170     void setHeaders(InternetHeaders headers) {

   171         this.headers = headers;

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

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

   174     }

   176     /**

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

   178      *

   179      * @param buf content data for the part

   180      */

   181     void addBody(ByteBuffer buf) {

   182         dataHead.addBody(buf);

   183     }

   185     /**

   186      * Callback to indicate that parsing is done for this part

   187      * (no more update events for this part)

   188      */

   189     void doneParsing() {

   190         parsed = true;

   191         dataHead.doneParsing();

   192     }

   194     /**

   195      * Callback to set Content-ID for this part

   196      * @param cid Content-ID of the part

   197      */

   198     void setContentId(String cid) {

   199         this.contentId = cid;

   200     }

   202     @Override

   203     public String toString() {

   204         return "Part="+contentId;

   205     }

   207 }

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