org.eclipse.osbp.xtext.action/src/org/eclipse/osbp/xtext/action/valueconverter/ActionQualifiedNameProvider.java

/**
 *                                                                            
 *  Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany) 
 *                                                                            
 *  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:                                                      
 * 	   Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation
 * 
 */
 package org.eclipse.osbp.xtext.action.valueconverter;

import java.util.List;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.xtext.naming.IQualifiedNameConverter;
import org.eclipse.xtext.naming.QualifiedName;
import org.eclipse.xtext.nodemodel.INode;
import org.eclipse.xtext.nodemodel.util.NodeModelUtils;
import org.eclipse.xtext.xbase.scoping.XbaseQualifiedNameProvider;
import org.eclipse.osbp.dsl.entity.xtext.extensions.ModelExtensions;
import org.eclipse.osbp.dsl.semantic.common.types.LFeature;
import org.eclipse.osbp.dsl.semantic.common.types.LPackage;
import org.eclipse.osbp.dsl.semantic.common.types.LType;

import com.google.inject.Inject;

import org.eclipse.osbp.xtext.functionlibrarydsl.FunctionLibraryFunction;
import org.eclipse.osbp.xtext.functionlibrarydsl.FunctionLibraryGroup;
import org.eclipse.osbp.xtext.action.ActionDSLPackage;
import org.eclipse.osbp.xtext.action.ActionToolbar;

@SuppressWarnings("restriction")
public class ActionQualifiedNameProvider extends XbaseQualifiedNameProvider {

	@Inject
	private IQualifiedNameConverter qualifiedNameConverter;

	@Inject
	private ModelExtensions extensions;

	@Override
	public QualifiedName getFullyQualifiedName(EObject obj) {
		if (obj == null) {
			return QualifiedName.create("");
		}
		if (obj instanceof ActionToolbar) {
			ActionToolbar toolbar = (ActionToolbar) obj;
            if (toolbar.getName() == null) {
            	return null;
            }
            return qualifiedNameConverter.toQualifiedName(toolbar.getName());
		}
		else if (obj instanceof FunctionLibraryGroup) {
            return qualifiedCrossReferenceNameConverter(obj, ActionDSLPackage.eINSTANCE.getActionButton_Group());
		}
		else if (obj instanceof FunctionLibraryFunction) {
			return qualifiedCrossReferenceNameConverter(obj, ActionDSLPackage.eINSTANCE.getActionButton_Canexecute());
		}
		return super.getFullyQualifiedName(obj);
	}

	// this method evaluates the cross referenced name of an object without causing cyclic lazy linking errors
	private QualifiedName qualifiedCrossReferenceNameConverter(EObject obj, EStructuralFeature feature) {
		List<INode> nodes = NodeModelUtils.findNodesForFeature(obj, feature);
		if (nodes.size() == 0) {
			return QualifiedName.create("");
		}
		return qualifiedNameConverter.toQualifiedName(NodeModelUtils.getTokenText(nodes.get(0)));
	}
	
	public QualifiedName getFQN(LFeature lfeature){
		   if(lfeature.getName() == null){
		    return QualifiedName.create("");
		   }
		   LType type = (LType) lfeature.eContainer();
		   LPackage pkg = extensions.getPackage(type);
		   if (pkg != null && type != null) {
		    final String qualifiedName = String.format("%s.%s.%s",
		      pkg.getName(), type.getName(), lfeature.getName());
		    if (qualifiedName == null)
		     return null;
		    return qualifiedNameConverter.toQualifiedName(qualifiedName);
		   } else {
		    return lfeature.getName() != null ? qualifiedNameConverter
		      .toQualifiedName(lfeature.getName()) : null;
		   }
	  }
}