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  /*
   * Copyright (c) OSGi Alliance (2002, 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.wireadmin;

Defines standard names for Wire properties, wire filter attributes, Consumer and Producer service properties.

Version:
$Id: 02fa7c680add08c46c2b0667014e22163d6faf6e $
Noimplement:
 
 public interface WireConstants {
Wire property key (named wireadmin.pid) specifying the persistent identity (PID) of this Wire object.

Each Wire object has a PID to allow unique and persistent identification of a specific Wire object. The PID must be generated by the WireAdmin service when the Wire object is created.

This wire property is automatically set by the Wire Admin service. The value of the property must be of type String.

 
 	public final static String	WIREADMIN_PID"wireadmin.pid";
A service registration property for a Producer service that is composite. It contains the names of the composite Consumer services it can inter-operate with. Inter-operability exists when any name in this array matches any name in the array set by the Consumer service. The type of this property must be String[].
 
 	public final static String	WIREADMIN_PRODUCER_COMPOSITE"wireadmin.producer.composite";
A service registration property for a Consumer service that is composite. It contains the names of the composite Producer services it can cooperate with. Inter-operability exists when any name in this array matches any name in the array set by the Producer service. The type of this property must be String[].
 
 	public final static String	WIREADMIN_CONSUMER_COMPOSITE"wireadmin.consumer.composite";
Service registration property key (named wireadmin.producer.scope ) specifying a list of names that may be used to define the scope of this Wire object. A Producer service should set this service property when it can produce more than one kind of value. This property is only used during registration, modifying the property must not have any effect of the Wire object's scope. Each name in the given list mist have WirePermission[name,PRODUCE] or else is ignored. The type of this service registration property must be String[].

 
 	public final static String	WIREADMIN_PRODUCER_SCOPE"wireadmin.producer.scope";
Service registration property key (named wireadmin.consumer.scope ) specifying a list of names that may be used to define the scope of this Wire object. A Consumer service should set this service property when it can produce more than one kind of value. This property is only used during registration, modifying the property must not have any effect of the Wire object's scope. Each name in the given list mist have WirePermission[name,CONSUME] or else is ignored. The type of this service registration property must be String[].

 
 	public final static String	WIREADMIN_CONSUMER_SCOPE"wireadmin.consumer.scope";
Matches all scope names.
 
 	public final static String	WIREADMIN_SCOPE_ALL[]			= {"*"};
Wire property key (named wireadmin.producer.pid) specifying the service.pid of the associated Producer service.

This wire property is automatically set by the WireAdmin service. The value of the property must be of type String.

 
 	public final static String	WIREADMIN_PRODUCER_PID"wireadmin.producer.pid";
Wire property key (named wireadmin.consumer.pid) specifying the service.pid of the associated Consumer service.

This wire property is automatically set by the Wire Admin service. The value of the property must be of type String.

	public final static String	WIREADMIN_CONSUMER_PID"wireadmin.consumer.pid";
Wire property key (named wireadmin.filter) specifying a filter used to control the delivery rate of data between the Producer and the Consumer service.

This property should contain a filter as described in the Filter class. The filter can be used to specify when an updated value from the Producer service should be delivered to the Consumer service. In many cases the Consumer service does not need to receive the data with the same rate that the Producer service can generate data. This property can be used to control the delivery rate.

The filter can use a number of pre-defined attributes that can be used to control the delivery of new data values. If the filter produces a match upon the wire filter attributes, the Consumer service should be notifed of the updated data value.

If the Producer service was registered with the WIREADMIN_PRODUCER_FILTERS service property indicating that the Producer service will perform the data filtering then the Wire object will not perform data filtering. Otherwise, the Wire object must perform basic filtering. Basic filtering includes supporting the following standard wire filter attributes:

	public final static String	WIREADMIN_FILTER"wireadmin.filter";
	/* Wire filter attribute names. */
Wire object's filter attribute (named wirevalue.current) representing the current value.
	public final static String	WIREVALUE_CURRENT"wirevalue.current";
Wire object's filter attribute (named wirevalue.previous) representing the previous value.
	public final static String	WIREVALUE_PREVIOUS"wirevalue.previous";
Wire object's filter attribute (named wirevalue.delta.absolute) representing the absolute delta. The absolute (always positive) difference between the last update and the current value (only when numeric). This attribute must not be used when the values are not numeric.
	public final static String	WIREVALUE_DELTA_ABSOLUTE"wirevalue.delta.absolute";
Wire object's filter attribute (named wirevalue.delta.relative) representing the relative delta. The relative difference is |previous-current |/| current| (only when numeric). This attribute must not be used when the values are not numeric.
	public final static String	WIREVALUE_DELTA_RELATIVE"wirevalue.delta.relative";
Wire object's filter attribute (named wirevalue.elapsed) representing the elapsed time, in ms, between this filter evaluation and the last update of the Consumer service.
	public final static String	WIREVALUE_ELAPSED"wirevalue.elapsed";
	/* Service registration property key names. */
Service Registration property (named wireadmin.producer.filters). A Producer service registered with this property indicates to the Wire Admin service that the Producer service implements at least the filtering as described for the WIREADMIN_FILTER property. If the Producer service is not registered with this property, the Wire object must perform the basic filtering as described in WIREADMIN_FILTER.

The type of the property value is not relevant. Only its presence is relevant.

	public final static String	WIREADMIN_PRODUCER_FILTERS"wireadmin.producer.filters";
Service Registration property (named wireadmin.consumer.flavors) specifying the list of data types understood by this Consumer service.

The Consumer service object must be registered with this service property. The list must be in the order of preference with the first type being the most preferred. The value of the property must be of type Class[].

	public final static String	WIREADMIN_CONSUMER_FLAVORS"wireadmin.consumer.flavors";
Service Registration property (named wireadmin.producer.flavors) specifying the list of data types available from this Producer service.

The Producer service object should be registered with this service property.

The value of the property must be of type Class[].

	public final static String	WIREADMIN_PRODUCER_FLAVORS"wireadmin.producer.flavors";
Service Registration property (named wireadmin.events) specifying the WireAdminEvent type of interest to a Wire Admin Listener service. The value of the property is a bitwise OR of all the WireAdminEvent types the Wire Admin Listener service wishes to receive and must be of type Integer.

See also:
WireAdminEvent
	public final static String	WIREADMIN_EVENTS"wireadmin.events";
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