1/**
2 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 *     http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 */
14package org.jivesoftware.smackx.pubsub;
15
16import java.util.Collections;
17import java.util.List;
18
19/**
20 * Represents the element holding the list of subscription elements.
21 *
22 * @author Robin Collier
23 */
24public class SubscriptionsExtension extends NodeExtension
25{
26	protected List<Subscription> items = Collections.EMPTY_LIST;
27
28	/**
29	 * Subscriptions to the root node
30	 *
31	 * @param subList The list of subscriptions
32	 */
33	public SubscriptionsExtension(List<Subscription> subList)
34	{
35		super(PubSubElementType.SUBSCRIPTIONS);
36
37		if (subList != null)
38			items = subList;
39	}
40
41	/**
42	 * Subscriptions to the specified node.
43	 *
44	 * @param nodeId The node subscribed to
45	 * @param subList The list of subscriptions
46	 */
47	public SubscriptionsExtension(String nodeId, List<Subscription> subList)
48	{
49		super(PubSubElementType.SUBSCRIPTIONS, nodeId);
50
51		if (subList != null)
52			items = subList;
53	}
54
55	/**
56	 * Gets the list of subscriptions.
57	 *
58	 * @return List of subscriptions
59	 */
60	public List<Subscription> getSubscriptions()
61	{
62		return items;
63	}
64
65	@Override
66	public String toXML()
67	{
68		if ((items == null) || (items.size() == 0))
69		{
70			return super.toXML();
71		}
72		else
73		{
74			StringBuilder builder = new StringBuilder("<");
75			builder.append(getElementName());
76
77			if (getNode() != null)
78			{
79				builder.append(" node='");
80				builder.append(getNode());
81				builder.append("'");
82			}
83			builder.append(">");
84
85			for (Subscription item : items)
86			{
87				builder.append(item.toXML());
88			}
89
90			builder.append("</");
91			builder.append(getElementName());
92			builder.append(">");
93			return builder.toString();
94		}
95	}
96}
97