/******************************************************************************
* 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 org.eclipse.sapphire.Event;
import org.eclipse.sapphire.Listener;
import org.eclipse.sapphire.PossibleValuesService;
import org.eclipse.sapphire.Property;
import org.eclipse.sapphire.Value;
import org.eclipse.sapphire.modeling.Status;
import org.eclipse.sapphire.services.ReferenceService;
import org.eclipse.sapphire.services.ServiceCondition;
import org.eclipse.sapphire.services.ServiceContext;
import org.eclipse.sapphire.services.ValidationService;
/**
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public final class PossibleValuesValidationService extends ValidationService
{
private PossibleValuesService possibleValuesService;
private Listener possibleValuesServiceListener;
@Override
protected void initValidationService()
{
this.possibleValuesService = context( Property.class ).service( PossibleValuesService.class );
this.possibleValuesServiceListener = new Listener()
{
@Override
public void handle( final Event event )
{
refresh();
}
};
this.possibleValuesService.attach( this.possibleValuesServiceListener );
}
@Override
protected Status compute()
{
final Value<?> value = context( Value.class );
final String text = value.text();
if( text != null && ! this.possibleValuesService.values().contains( text ) )
{
return this.possibleValuesService.problem( value );
}
return Status.createOkStatus();
}
@Override
public void dispose()
{
super.dispose();
if( this.possibleValuesServiceListener != null )
{
this.possibleValuesService.detach( this.possibleValuesServiceListener );
}
}
public static final class Condition extends ServiceCondition
{
@Override
public boolean applicable( final ServiceContext context )
{
final Value<?> value = context.find( Value.class );
return ( value != null && value.service( PossibleValuesService.class ) != null && value.service( ReferenceService.class ) == null );
}
}
}