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  */
  25 
  26 package com.sun.xml.internal.org.jvnet.mimepull;
  27 
  28 import java.nio.ByteBuffer;
  29 
  30 /**
  31  * @author Jitendra Kotamraju
  32  */
  33 abstract class MIMEEvent {
  34 
  35     enum EVENT_TYPE {START_MESSAGE, START_PART, HEADERS, CONTENT, END_PART, END_MESSAGE}
  36 
  37     /**
  38      * Returns a event for parser's current cursor location in the MIME message.
  39      *
  40      * <p>
  41      * {@link EVENT_TYPE#START_MESSAGE} and {@link EVENT_TYPE#START_MESSAGE} events
  42      * are generated only once.
  43      *
  44      * <p>
  45      * {@link EVENT_TYPE#START_PART}, {@link EVENT_TYPE#END_PART}, {@link EVENT_TYPE#HEADERS}
  46      * events are generated only once for each attachment part.
  47      *
  48      * <p>
  49      * {@link EVENT_TYPE#CONTENT} event may be generated more than once for an attachment
  50      * part.
  51      *
  52      * @return event type
  53      */
  54     abstract EVENT_TYPE getEventType();
  55 
  56     static final StartMessage START_MESSAGE = new StartMessage();
  57     static final StartPart START_PART = new StartPart();
  58     static final EndPart END_PART = new EndPart();
  59     static final EndMessage END_MESSAGE = new EndMessage();
  60 
  61     static final class StartMessage extends MIMEEvent {
  62         EVENT_TYPE getEventType() {
  63             return EVENT_TYPE.START_MESSAGE;
  64         }
  65     }
  66 
  67     static final class StartPart extends MIMEEvent {
  68         EVENT_TYPE getEventType() {
  69             return EVENT_TYPE.START_PART;
  70         }
  71     }
  72 
  73     static final class EndPart extends MIMEEvent {
  74         EVENT_TYPE getEventType () {
  75             return EVENT_TYPE.END_PART;
  76         }
  77     }
  78 
  79     static final class Headers extends MIMEEvent {
  80         InternetHeaders ih;
  81 
  82         Headers(InternetHeaders ih) {
  83             this.ih = ih;
  84         }
  85 
  86         EVENT_TYPE getEventType() {
  87             return EVENT_TYPE.HEADERS;
  88         }
  89 
  90         InternetHeaders getHeaders() {
  91             return ih;
  92         }
  93     }
  94 
  95     static final class Content extends MIMEEvent {
  96         private final ByteBuffer buf;
  97 
  98         Content(ByteBuffer buf) {
  99             this.buf = buf;
 100         }
 101 
 102         EVENT_TYPE getEventType() {
 103             return EVENT_TYPE.CONTENT;
 104         }
 105 
 106         ByteBuffer getData() {
 107             return buf;
 108         }
 109     }
 110 
 111     static final class EndMessage extends MIMEEvent {
 112         EVENT_TYPE getEventType() {
 113             return EVENT_TYPE.END_MESSAGE;
 114         }
 115     }
 116 
 117 }