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  /*
   * Copyright (c) OSGi Alliance (2004, 2011). All Rights Reserved.
   * 
   * 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 org.osgi.service.dmt.notification;
 
Immutable data structure carried in an alert (client initiated notification). The AlertItem describes details of various notifications that can be sent by the client, for example as alerts in the OMA DM protocol. The use cases include the client sending a session request to the server (alert 1201), the client notifying the server of completion of a software update operation (alert 1226) or sending back results in response to an asynchronous EXEC command.

The data syntax and semantics varies widely between various alerts, so does the optionality of particular parameters of an alert item. If an item, such as source or type, is not defined, the corresponding getter method returns null. For example, for alert 1201 (client-initiated session) all elements will be null.

The syntax used in AlertItem class corresponds to the OMA DM alert format. NotificationService implementations on other management protocols should map these constructs to the underlying protocol.

Version:
$Id: 00a8bb22095ed3efe92fd81173b40069118e7cc9 $
 
 public class AlertItem {
 
     private final String source;
 
     private final String type;
 
     private final String mark;
 
     private final DmtData data;

Create an instance of the alert item. The constructor takes all possible data entries as parameters. Any of these parameters can be null. The semantics of the parameters may be refined by the definition of a specific alert, identified by its alert code (see NotificationService.sendNotification(java.lang.String,int,java.lang.String,org.osgi.service.dmt.notification.AlertItem[]) ). In case of Generic Alerts for example (code 1226), the mark parameter contains a severity string.

Parameters:
source the URI of the node which is the source of the alert item
type a MIME type or a URN that identifies the type of the data in the alert item
data a DmtData object that contains the format and value of the data in the alert item
mark the mark parameter of the alert item
 
     public AlertItem(String sourceString typeString markDmtData data) {
         this. = source;
         this. = type;
         this. = mark;
         this. = data;
     }

Create an instance of the alert item, specifying the source node URI as an array of path segments. The constructor takes all possible data entries as parameters. Any of these parameters can be null. The semantics of the parameters may be refined by the definition of a specific alert, identified by its alert code (see NotificationService.sendNotification(java.lang.String,int,java.lang.String,org.osgi.service.dmt.notification.AlertItem[]) ). In case of Generic Alerts for example (code 1226), the mark parameter contains a severity string.

Parameters:
source the path of the node which is the source of the alert item
type a MIME type or a URN that identifies the type of the data in the alert item
data a DmtData object that contains the format and value of the data in the alert item
mark the mark parameter of the alert item
 
     public AlertItem(String[] sourceString typeString markDmtData data) {
         if ((null == source)) {
             this. = null;
         } else {
             this. = Uri.toUri(source);
         }
         this. = type;
         this. = mark;
         this. = data;
    }

    
Get the node which is the source of the alert. There might be no source associated with the alert item.

Returns:
the URI of the node which is the source of this alert, or null if there is no source
    public String getSource() {
        return ;
    }

Get the type associated with the alert item. The type string is a MIME type or a URN that identifies the type of the data in the alert item (returned by getData()). There might be no type associated with the alert item.

Returns:
the type type associated with the alert item, or null if there is no type
    public String getType() {
        return ;
    }

Get the mark parameter associated with the alert item. The interpretation of the mark parameter depends on the alert being sent, as identified by the alert code in NotificationService.sendNotification(java.lang.String,int,java.lang.String,org.osgi.service.dmt.notification.AlertItem[]) . There might be no mark associated with the alert item.

Returns:
the mark associated with the alert item, or null if there is no mark
    public String getMark() {
        return ;
    }

    
Get the data associated with the alert item. The returned DmtData object contains the format and the value of the data in the alert item. There might be no data associated with the alert item.

Returns:
the data associated with the alert item, or null if there is no data
    public DmtData getData() {
        return ;
    }

    
Returns the string representation of this alert item. The returned string includes all parameters of the alert item, and has the following format:
   AlertItem(<source>, <type>, <mark>, <data>)
 
The last parameter is the string representation of the data value. The format of the data is not explicitly included.

Returns:
the string representation of this alert item
    public String toString() {
        return "AlertItem(" +  + ", " +  + ", " +  + ", " + 
                + ")";
    }
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