blob: 778d08623abc87457beb1fdfb7f59abc1d1dd2b2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* Licensed 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 net.java.sip.communicator.impl.protocol.jabber.extensions;
import java.util.logging.*;
import net.java.sip.communicator.service.protocol.jabber.*;
import org.jivesoftware.smack.packet.*;
import org.jivesoftware.smack.provider.*;
import org.xmlpull.v1.*;
/**
* A provider that parses incoming packet extensions into instances of the
* {@link Class} that it has been instantiated for.
*
* @param <C> Class that the packets we will be parsing belong to
* @author Emil Ivov
*/
public class DefaultPacketExtensionProvider<C extends AbstractPacketExtension>
implements PacketExtensionProvider
{
/**
* The <tt>Logger</tt> used by the <tt>DefaultPacketExtensionProvider</tt>
* class and its instances for logging output.
*/
private static final Logger logger = Logger
.getLogger(DefaultPacketExtensionProvider.class.getName());
/**
* The <tt>AbstractSmackInteroperabilityLayer</tt> instance implementing
* necessary methods
*/
private AbstractSmackInteroperabilityLayer smackInteroperabilityLayer =
AbstractSmackInteroperabilityLayer.getInstance();
/**
* The {@link Class} that the packets we will be parsing here belong to.
*/
private final Class<C> packetClass;
/**
* Creates a new packet provider for the specified packet extensions.
*
* @param c the {@link Class} that the packets we will be parsing belong to.
*/
public DefaultPacketExtensionProvider(Class<C> c)
{
this.packetClass = c;
}
/**
* Parse an extension sub-packet and create a <tt>C</tt> instance. At
* the beginning of the method call, the xml parser will be positioned on
* the opening element of the packet extension and at the end of the method
* call it will be on the closing element of the packet extension.
*
* @param parser an XML parser positioned at the packet's starting element.
*
* @return a new packet extension instance.
*
* @throws java.lang.Exception if an error occurs parsing the XML.
*/
public C parseExtension(XmlPullParser parser) throws Exception
{
C packetExtension = packetClass.newInstance();
//first, set all attributes
int attrCount = parser.getAttributeCount();
for (int i = 0; i < attrCount; i++)
{
packetExtension.setAttribute(
parser.getAttributeName(i),
parser.getAttributeValue(i));
}
//now parse the sub elements
boolean done = false;
int eventType;
String elementName;
String namespace;
while (!done)
{
eventType = parser.next();
elementName = parser.getName();
namespace = parser.getNamespace();
if (logger.isLoggable(Level.FINEST))
logger.finest("Will parse " + elementName
+ " ns=" + namespace
+ " class=" + packetExtension.getClass().getSimpleName());
if (eventType == XmlPullParser.START_TAG)
{
PacketExtensionProvider provider = smackInteroperabilityLayer
.getExtensionProvider( elementName, namespace );
if(provider == null)
{
//we don't know how to handle this kind of extensions.
logger.fine("Could not add a provider for element "
+ elementName + " from namespace " + namespace);
}
else
{
PacketExtension childExtension
= provider.parseExtension(parser);
if(namespace != null)
{
if(childExtension instanceof AbstractPacketExtension)
{
((AbstractPacketExtension)childExtension).
setNamespace(namespace);
}
}
packetExtension.addChildExtension(childExtension);
}
}
if (eventType == XmlPullParser.END_TAG)
{
if (parser.getName().equals(packetExtension.getElementName()))
{
done = true;
}
}
if (eventType == XmlPullParser.TEXT)
{
String text = parser.getText();
packetExtension.setText(text);
}
if (logger.isLoggable(Level.FINEST))
logger.finest("Done parsing " + elementName);
}
return packetExtension;
}
}
|
