/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.ambari.server.view.events;
import java.util.Collections;
import java.util.Map;
import org.apache.ambari.view.ViewDefinition;
import org.apache.ambari.view.ViewInstanceDefinition;
import org.apache.ambari.view.events.Event;
/**
* View event implementation.
*/
public class EventImpl implements Event {
/**
* The event id.
*/
private final String id;
/**
* The event properties.
*/
private final Map<String, String> properties;
/**
* The view subject of the event.
*/
private final ViewDefinition viewSubject;
/**
* The instance subject of the event.
*/
private final ViewInstanceDefinition viewInstanceSubject;
// ----- Constructors ------------------------------------------------------
/**
* Construct an event.
*
* @param id the event id
* @param properties the event properties
* @param viewSubject the subject of the event
*/
public EventImpl(String id, Map<String, String> properties, ViewDefinition viewSubject) {
this(id, properties, viewSubject, null);
}
/**
* Construct an event.
*
* @param id the event id
* @param properties the event properties
* @param viewInstanceSubject the subject of the event
*/
public EventImpl(String id, Map<String, String> properties, ViewInstanceDefinition viewInstanceSubject) {
this(id, properties, viewInstanceSubject.getViewDefinition(), viewInstanceSubject);
}
// private constructor
private EventImpl(String id, Map<String, String> properties,
ViewDefinition viewSubject, ViewInstanceDefinition viewInstanceSubject) {
this.id = id;
this.viewSubject = viewSubject;
this.viewInstanceSubject = viewInstanceSubject;
this.properties = properties == null ? Collections.<String, String>emptyMap() :
Collections.unmodifiableMap(properties);
}
// ----- Event -------------------------------------------------------------
/**
* Get the event identifier.
*
* @return the id
*/
public String getId() {
return id;
}
/**
* Get the event properties.
*
* @return the properties
*/
public Map<String, String> getProperties() {
return properties;
}
/**
* Get the view subject of the event.
*
* @return the view subject
*/
public ViewDefinition getViewSubject() {
return viewSubject;
}
/**
* Get the instance subject of the event.
*
* @return the instance subject; null if this is a view level event
*/
public ViewInstanceDefinition getViewInstanceSubject() {
return viewInstanceSubject;
}
// ----- Object overrides --------------------------------------------------
@Override
public String toString() {
return "View Event " + id;
}
}