/******************************************************************************
* 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.LocalizableText;
import org.eclipse.sapphire.MasterConversionService;
import org.eclipse.sapphire.PropertyDef;
import org.eclipse.sapphire.Text;
import org.eclipse.sapphire.Value;
import org.eclipse.sapphire.ValueProperty;
import org.eclipse.sapphire.modeling.Status;
import org.eclipse.sapphire.modeling.ValueKeyword;
import org.eclipse.sapphire.modeling.annotations.NumericRange;
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>
*/
@SuppressWarnings( { "rawtypes", "unchecked" } )
public final class NumericRangeValidationService extends ValidationService
{
@Text( "{0} is smaller than the minimum allowed value ({1})" )
private static LocalizableText smallerThanMinimumMessage;
@Text( "{0} is larger than the maximum allowed value ({1})" )
private static LocalizableText largerThanMaxiumMessage;
static
{
LocalizableText.init( NumericRangeValidationService.class );
}
private Comparable min;
private Comparable max;
@Override
protected void initValidationService()
{
final PropertyDef property = context( PropertyDef.class );
final Class<?> type = property.getTypeClass();
final NumericRange rangeConstraintAnnotation = property.getAnnotation( NumericRange.class );
final MasterConversionService converter = property.service( MasterConversionService.class );
final String minStr = rangeConstraintAnnotation.min();
if( minStr != null )
{
this.min = ( minStr.length() > 0 ? (Comparable) converter.convert( minStr, type ) : null );
}
final String maxStr = rangeConstraintAnnotation.max();
if( maxStr != null )
{
this.max = ( maxStr.length() > 0 ? (Comparable) converter.convert( maxStr, type ) : null );
}
}
@Override
protected Status compute()
{
final Value<Comparable> value = context( Value.class );
final Comparable val = (Comparable) value.content( true );
if( val != null )
{
final ValueProperty property = value.definition();
if( this.min != null && val.compareTo( this.min ) < 0 )
{
final String msg = smallerThanMinimumMessage.format( val, normalizeForDisplay( property, this.min ) );
return Status.createErrorStatus( msg );
}
if( this.max != null && val.compareTo( this.max ) > 0 )
{
final String msg = largerThanMaxiumMessage.format( val, normalizeForDisplay( property, this.max ) );
return Status.createErrorStatus( msg );
}
}
return Status.createOkStatus();
}
private String normalizeForDisplay( final ValueProperty property,
final Object value )
{
String result = property.encodeKeywords( value.toString() );
ValueKeyword keyword = property.getKeyword( result );
if( keyword != null )
{
result = keyword.toDisplayString();
}
return result;
}
public static final class Condition extends ServiceCondition
{
@Override
public boolean applicable( final ServiceContext context )
{
final ValueProperty property = context.find( ValueProperty.class );
return ( property != null && property.hasAnnotation( NumericRange.class ) && Number.class.isAssignableFrom( property.getTypeClass() ) );
}
}
}