/******************************************************************************
* 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.internal;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.sapphire.LoggingService;
import org.eclipse.sapphire.PropertyDef;
import org.eclipse.sapphire.Sapphire;
import org.eclipse.sapphire.modeling.ModelPath;
import org.eclipse.sapphire.modeling.annotations.DependsOn;
import org.eclipse.sapphire.services.DependenciesService;
import org.eclipse.sapphire.services.DependenciesServiceData;
import org.eclipse.sapphire.services.ServiceCondition;
import org.eclipse.sapphire.services.ServiceContext;
/**
* Implementation of DependenciesService that exposes dependencies specified by the @DependsOn annotation.
*
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public final class DeclarativeDependenciesService extends DependenciesService
{
@Override
protected DependenciesServiceData compute()
{
final Set<String> dependenciesAsStrings = new HashSet<String>();
final DependsOn dependsOnAnnotation = context( PropertyDef.class ).getAnnotation( DependsOn.class );
if( dependsOnAnnotation != null )
{
for( String dependsOnPropertyRef : dependsOnAnnotation.value() )
{
dependenciesAsStrings.add( dependsOnPropertyRef );
}
}
final Set<ModelPath> dependencies = new HashSet<ModelPath>();
for( String str : dependenciesAsStrings )
{
ModelPath path = null;
try
{
path = new ModelPath( str );
}
catch( ModelPath.MalformedPathException e )
{
Sapphire.service( LoggingService.class ).log( e );
}
dependencies.add( path );
}
return new DependenciesServiceData( dependencies );
}
public static final class Condition extends ServiceCondition
{
@Override
public boolean applicable( final ServiceContext context )
{
return context.find( PropertyDef.class ).hasAnnotation( DependsOn.class );
}
}
}