fiore@0: /*  
fiore@0:  CCmI Diagram Editor for Android 
fiore@0:   
fiore@0:  Copyright (C) 2012  Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)
fiore@0: 
fiore@0:  This program is free software: you can redistribute it and/or modify
fiore@0:  it under the terms of the GNU General Public License as published by
fiore@0:  the Free Software Foundation, either version 3 of the License, or
fiore@0:  (at your option) any later version.
fiore@0: 
fiore@0:  This program is distributed in the hope that it will be useful,
fiore@0:  but WITHOUT ANY WARRANTY; without even the implied warranty of
fiore@0:  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
fiore@0:  GNU General Public License for more details.
fiore@0: 
fiore@0:  You should have received a copy of the GNU General Public License
fiore@0:  along with this program.  If not, see <http://www.gnu.org/licenses/>.
fiore@0: */
fiore@0: package uk.ac.qmul.eecs.ccmi.xmlparser;
fiore@0: 
fiore@0: import java.util.Iterator;
fiore@0: import java.util.List;
fiore@0: 
fiore@0: /**
fiore@0:  * An implementation of {@code DiagramUpdater} that immediately execute the commands on the local instance
fiore@0:  * of {@code Diagram}. 
fiore@0:  */
fiore@0: public class LocalDiagramUpdater implements DiagramUpdater {
fiore@0: 	Diagram diagram;
fiore@0: 
fiore@0: 	/**
fiore@0: 	 * Constructor 
fiore@0: 	 * 
fiore@0: 	 * @param diagram the diagram the commands will be executed on
fiore@0: 	 */
fiore@0: 	public LocalDiagramUpdater(Diagram diagram){
fiore@0: 		this.diagram = diagram;
fiore@0: 	}
fiore@0: 	
fiore@0: 	@Override
fiore@0: 	public void addNode(Node node){
fiore@0: 		diagram.getComponents().getNodes().add(node);
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void rename(HierarchyItem item, String newName) {
fiore@0: 		if(item instanceof Node){
fiore@0: 			((Node)item).setName(newName);
fiore@0: 		}else if(item instanceof Edge){
fiore@0: 			((Edge)item).setName(newName);
fiore@0: 		}else if(item instanceof PropertyValue){
fiore@0: 			((PropertyValue)item).setValue(newName);
fiore@0: 		}
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void delete(HierarchyItem item) {
fiore@0: 		if(item instanceof Node){
fiore@0: 			diagram.getComponents().getNodes().remove(item);
fiore@0: 			Node node = (Node)item;
fiore@0: 			Iterator<Edge> iterator = diagram.getComponents().getEdges().iterator(); 
fiore@0: 			/* we are deleting this node, so we need to remove it from  * 
fiore@0: 			 * attached nodes list of the edges it's attached to        */
fiore@0: 			while(iterator.hasNext()){
fiore@0: 				Edge edge = iterator.next();
fiore@0: 				boolean removed = false;
fiore@0: 				for(EdgeNode edgeNode : edge.getAttachedNodes()){
fiore@0: 					if(edgeNode.getId() == node.getId()){
fiore@0: 						edge.getAttachedNodes().remove(edgeNode);
fiore@0: 						removed = true;
fiore@0: 						break;
fiore@0: 					}
fiore@0: 				}
fiore@0: 				/* there cannot be an edge with one node only. If the edge had two nodes one * 
fiore@0: 				 * of which was the deleted one, then the edge itself must be deleted        */
fiore@0: 				if(removed && edge.getAttachedNodes().size() == 1)
fiore@0: 					iterator.remove();
fiore@0: 			}
fiore@0: 			
fiore@0: 		}else if(item instanceof Edge){
fiore@0: 			diagram.getComponents().getEdges().remove(item);
fiore@0: 		}else if(item instanceof PropertyValue){
fiore@0: 			for(Node node: diagram.getComponents().getNodes()){
fiore@0: 				for(NodeProperty property : node.getProperties()){
fiore@0: 					if(property.getValues().remove(item)){
fiore@0: 						return;
fiore@0: 					}
fiore@0: 				}
fiore@0: 			}
fiore@0: 		}
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void addEdge(Edge edge) {
fiore@0: 		diagram.getComponents().getEdges().add(edge);
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void addProperty(Node node, NodeProperty property, String propertyValue) {
fiore@0: 		property.getValues().add(new PropertyValue(propertyValue));
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void setLabel(EdgeNode edgeNode, String label) {
fiore@0: 		edgeNode.setLabel(label);
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void setArrowHead(EdgeNode edgeNode, String arrowHead) {
fiore@0: 		edgeNode.setHead(arrowHead);
fiore@0: 	}
fiore@0: 
fiore@0: 	@Override
fiore@0: 	public void setModifiers(PropertyValue propertyValue, List<Integer> modifiers) {
fiore@0: 		propertyValue.setModifiersIndexes(modifiers);		
fiore@0: 	}
fiore@0: 
fiore@0: }