/******************************************************************************
* 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.modeling.el;
import org.eclipse.sapphire.Version;
import org.eclipse.sapphire.VersionConstraint;
/**
* Determines whether a version matches a version constraint. A version constraint is a comma-separated
* list of specific versions, closed ranges (expressed using "[1.2.3-4.5)" syntax and open ranges
* (expressed using "[1.2.3" or "4.5)" syntax). The square brackets indicate that the range includes
* the specified version. The parenthesis indicate that the range goes up to, but does not actually
* include the specified version.
*
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public final class VersionMatchesFunction extends Function
{
@Override
public String name()
{
return "VersionMatches";
}
@Override
public FunctionResult evaluate( final FunctionContext context )
{
return new FunctionResult( this, context )
{
@Override
protected Object evaluate()
{
boolean result = false;
final Version version = cast( operand( 0 ), Version.class );
if( version != null )
{
final VersionConstraint constraint = cast( operand( 1 ), VersionConstraint.class );
if( constraint != null )
{
result = constraint.check( version );
}
}
return result;
}
};
}
}