/******************************************************************************
* Copyright (c) 2014 Oracle
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Konstantin Komissarchik - initial implementation and ongoing maintenance
******************************************************************************/
package org.eclipse.sapphire.services;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.sapphire.Disposable;
import org.eclipse.sapphire.Event;
import org.eclipse.sapphire.Listener;
import org.eclipse.sapphire.ListenerContext;
import org.eclipse.sapphire.LoggingService;
import org.eclipse.sapphire.Sapphire;
import org.eclipse.sapphire.util.MapFactory;
import org.eclipse.sapphire.util.SetFactory;
/**
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public abstract class Service implements Disposable
{
private boolean initialized;
private ServiceContext context;
private String id;
private Map<String,String> params;
private Set<String> overrides;
private ListenerContext listeners;
final void init( final ServiceContext context,
final String id,
final Map<String,String> params,
final Set<String> overrides )
{
this.context = context;
this.id = id;
this.params = MapFactory.unmodifiable( params );
this.overrides = SetFactory.unmodifiable( overrides );
this.listeners = new ListenerContext( context.queue() );
}
final void initIfNecessary()
{
if( ! this.initialized )
{
this.initialized = true;
try
{
init();
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
}
}
}
protected void init()
{
}
public final ServiceContext context()
{
return this.context;
}
public final <T> T context( final Class<T> type )
{
return this.context.find( type );
}
protected final <S extends Service> S service( final Class<S> serviceType )
{
return this.context.service( serviceType );
}
protected final <S extends Service> List<S> services( final Class<S> serviceType )
{
return this.context.services( serviceType );
}
final String id()
{
return this.id;
}
protected final Map<String,String> params()
{
return this.params;
}
protected final String param( final String name )
{
return this.params.get( name );
}
final Set<String> overrides()
{
return this.overrides;
}
public final boolean attach( final Listener listener )
{
return this.listeners.attach( listener );
}
public final boolean detach( final Listener listener )
{
return this.listeners.detach( listener );
}
protected final void broadcast( final Event event )
{
this.listeners.broadcast( event );
}
protected final void broadcast()
{
broadcast( new ServiceEvent( this ) );
}
@Override
public void dispose()
{
}
}