mirror of
https://codeberg.org/Mercury-IM/Smack
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f7a1c750ad
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@11346 b35dd754-fafc-0310-a699-88a17e54d16e
95 lines
3.5 KiB
Java
95 lines
3.5 KiB
Java
/**
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.pubsub;
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import org.jivesoftware.smack.packet.PacketExtension;
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import org.jivesoftware.smackx.pubsub.provider.ItemProvider;
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/**
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* This class represents an item that has been, or will be published to a
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* pubsub node. An <tt>Item</tt> has several properties that are dependent
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* on the configuration of the node to which it has been or will be published.
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*
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* <h1>An Item received from a node (via {@link LeafNode#getItems()} or {@link LeafNode#addItemEventListener(org.jivesoftware.smackx.pubsub.listener.ItemEventListener)}</b>
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* <li>Will always have an id (either user or server generated) unless node configuration has both
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* {@link ConfigureForm#isPersistItems()} and {@link ConfigureForm#isDeliverPayloads()}set to false.
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* <li>Will have a payload if the node configuration has {@link ConfigureForm#isDeliverPayloads()} set
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* to true, otherwise it will be null.
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*
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* <h1>An Item created to send to a node (via {@link LeafNode#send()} or {@link LeafNode#publish()}</b>
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* <li>The id is optional, since the server will generate one if necessary, but should be used if it is
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* meaningful in the context of the node. This value must be unique within the node that it is sent to, since
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* resending an item with the same id will overwrite the one that already exists if the items are persisted.
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* <li>Will require payload if the node configuration has {@link ConfigureForm#isDeliverPayloads()} set
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* to true.
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*
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* <p>To customise the payload object being returned from the {@link #getPayload()} method, you can
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* add a custom parser as explained in {@link ItemProvider}.
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*
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* @author Robin Collier
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*/
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public class PayloadItem<E extends PacketExtension> extends Item
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{
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private E payload;
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/**
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* Create an <tt>Item</tt> with an id and payload.
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*
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* @param itemId The id of this item. It can be null if we want the server to set the id.
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* @param payloadExt A {@link PacketExtension} which represents the payload data.
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*/
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public PayloadItem(String itemId, E payloadExt)
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{
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super(itemId);
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if (payloadExt == null)
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throw new IllegalArgumentException("payload cannot be 'null'");
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payload = payloadExt;
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}
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/**
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* Get the payload associated with this <tt>Item</tt>. Customising the payload
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* parsing from the server can be accomplished as described in {@link ItemProvider}.
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*
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* @return The payload as a {@link PacketExtension}.
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*/
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public E getPayload()
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{
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return payload;
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}
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public String toXML()
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{
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StringBuilder builder = new StringBuilder("<item");
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if (getId() != null)
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{
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builder.append(" id='");
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builder.append(getId());
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builder.append("'");
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}
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builder.append(">");
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builder.append(payload.toXML());
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builder.append("</item>");
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return builder.toString();
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}
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@Override
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public String toString()
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{
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return getClass().getName() + " | Content [" + toXML() + "]";
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}
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}
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