/******************************************************************************
* Copyright (c) 2016 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 java.util.List;
import org.eclipse.sapphire.util.ListFactory;
/**
* Logical OR function.
*
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public final class OrFunction extends Function
{
public static Function create( final Function... operands )
{
return create( ListFactory.<Function>start().add( operands ) );
}
public static Function create( final List<Function> operands )
{
return create( ListFactory.<Function>start().add( operands ) );
}
private static Function create( final ListFactory<Function> operands )
{
final int cardinality = operands.size();
if( cardinality == 0 )
{
return null;
}
else if( cardinality == 1 )
{
return operands.get( 0 );
}
else
{
final OrFunction function = new OrFunction();
function.init( operands.result() );
return function;
}
}
@Override
public String name()
{
return "||";
}
@Override
public boolean operator()
{
return true;
}
@Override
public int precedence()
{
return 6;
}
@Override
public FunctionResult evaluate( final FunctionContext context )
{
return new FunctionResult( this, context )
{
@Override
protected Object evaluate()
{
boolean result = false;
for( FunctionResult operand : operands() )
{
result = result || cast( operand.value(), Boolean.class );
}
return result;
}
};
}
}