/******************************************************************************
* 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:
* Shenxue Zhou - initial implementation and ongoing maintenance
* Konstantin Komissarchik - [348751] Diagram connection labels should check for derived and readonly properties
******************************************************************************/
package org.eclipse.sapphire.ui.diagram.editor;
import java.util.List;
import org.eclipse.sapphire.Element;
import org.eclipse.sapphire.Property;
import org.eclipse.sapphire.Value;
import org.eclipse.sapphire.modeling.el.FunctionResult;
import org.eclipse.sapphire.modeling.el.Literal;
import org.eclipse.sapphire.modeling.el.PropertyAccessFunction;
/**
* @author <a href="mailto:shenxue.zhou@oracle.com">Shenxue Zhou</a>
*/
public class FunctionUtil
{
public static Value<?> getFunctionProperty(Element element, FunctionResult functionResult)
{
if (functionResult.function() instanceof PropertyAccessFunction)
{
if (functionResult.operands().size() == 1)
{
if (functionResult.operand(0) instanceof String)
{
final Property property = element.property( (String)functionResult.operand(0) );
if( property != null && property instanceof Value && ! property.definition().isReadOnly() )
{
return (Value<?>)property;
}
}
}
else
{
if (functionResult.operand(1) instanceof String)
{
String temp = (String)functionResult.operand(1);
if (temp.equalsIgnoreCase("text") || temp.equalsIgnoreCase("content"))
{
if (functionResult.function().operand(0) instanceof PropertyAccessFunction)
{
PropertyAccessFunction nestedFunc = (PropertyAccessFunction)functionResult.function().operand(0);
if (nestedFunc.operands().size() == 1 && nestedFunc.operand(0) instanceof Literal)
{
String propName = (String)((Literal)nestedFunc.operand(0)).value();
final Property property = element.property( propName );
if( property != null && property instanceof Value && ! property.definition().isReadOnly() )
{
return (Value<?>)property;
}
}
}
}
}
}
}
else
{
List<FunctionResult> subFuncs = functionResult.operands();
for (FunctionResult subFunc : subFuncs)
{
Value<?> property = getFunctionProperty(element, subFunc);
if( property != null )
{
return property;
}
}
}
return null;
}
}