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/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/

package org.jbpm.simulation.util;

import java.util.List;
import java.util.Map;

import org.eclipse.bpmn2.Definitions;
import org.eclipse.bpmn2.Process;
import org.eclipse.bpmn2.RootElement;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.util.ExtendedMetaData;
import org.eclipse.emf.ecore.xmi.XMLHelper;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.emf.ecore.xmi.XMLResource.ElementHandler;
import org.eclipse.emf.ecore.xmi.XMLResource.XMLMap;
import org.eclipse.emf.ecore.xmi.impl.XMLSaveImpl;

public class JBPMXMLSaveImpl extends XMLSaveImpl {
	
	public JBPMXMLSaveImpl(XMLHelper helper) {
		super(helper);
	}
	
	@Override
	protected void init(XMLResource resource, Map options) {
		super.init(resource, options);
		featureTable = new JBPMXMLSaveImpl.JBPMLookup(map, extendedMetaData, elementHandler);
	}
	
	@Override
	public void traverse(List contents) {
		for(EObject e : contents) {
			if(e instanceof Definitions) {
				List roots = ((Definitions) e).getRootElements();
				Process p = null;
				for(RootElement root : roots) {
					if(root instanceof Process) {
						p = (Process) root;
					}
				}
				if(p != null) {
					((Definitions) e).getRootElements().remove(p);
					((Definitions) e).getRootElements().add(p);
				}
			}
		}
		super.traverse(contents);
	}
	
	public static class JBPMLookup extends XMLSaveImpl.Lookup {
		public JBPMLookup(XMLMap map, ExtendedMetaData extendedMetaData, ElementHandler elementHandler) {
			super(map, extendedMetaData, elementHandler);
		}
		
		@Override
		public EStructuralFeature[] getFeatures(EClass cls) {
			int index = getIndex(cls);
			EClass c = classes[index];

			if (c == cls) {
				return features[index];
			}

			EStructuralFeature[] featureList = listFeatures(cls);
			if (c == null) {
				classes[index] = cls;
				features[index] = featureList;
				featureKinds[index] = listKinds(featureList);
			}
			
			if(cls.getName().equalsIgnoreCase("Process")) {
				EStructuralFeature[] modifiedFeatureList =  getModifiedProcessFeatureSet(featureList);
				if (c == null) {
					classes[index] = cls;
					features[index] = modifiedFeatureList;
					featureKinds[index] = listKinds(modifiedFeatureList);
				}
				return modifiedFeatureList;
			}
			return featureList;
		}
	}
	
	private static EStructuralFeature[] getModifiedProcessFeatureSet(EStructuralFeature[] processFeatureList) {
		/**
		 Feature list for Process provided by eclipse.bpmn2:
    		- extensionDefinitions (0)
    		- id (1)
    		- anyAttribute (2)
    		- name (3)
    		- definitionalCollaborationRef (4)
    		- isClosed (5)
    		- isExecutable (6)
    		- processType (7) 
    		- extensionValues (8) 
    		- documentation (9) 
    		- supportedInterfaceRefs (10) 
    		- ioSpecification (11) 
    		- ioBinding (12)
    		- laneSets (13)
    		- flowElements (14)
    		- auditing (15)
    		- monitoring (16)
    		- properties (17)
    		- artifacts (18)
    		- resources (19) 
    		- correlationSubscriptions (20)
    		- supports (21) 
    	  Semantic.xsd sequence definition for Process:
    	  
			
			
			
			
			
			
			
			
			
		  
		  
		  Moving auditing, monitoring, property above flowElements...
		 */
		
		EStructuralFeature[] retArray = new EStructuralFeature[processFeatureList.length];
		for(int i=0; i<13; i++) {
			retArray[i] = processFeatureList[i];
		}
		retArray[13] = processFeatureList[15]; // auditing
		retArray[14] = processFeatureList[16]; // monitoring
		retArray[15] = processFeatureList[17]; // properties
		retArray[16] = processFeatureList[13]; // lanesets
		retArray[17] = processFeatureList[14]; // flow elements
		retArray[18] = processFeatureList[18]; // artifacts
		retArray[19] = processFeatureList[19]; // resources
		retArray[20] = processFeatureList[20]; // correlationSubscriptions
		retArray[21] = processFeatureList[21]; // supports
		
		return retArray;
	}
}