public class GexfResourceImpl extends XMLResourceImpl {
	protected Map<String, EObject> idToNodeContentMap = new HashMap<String, EObject>();;
	protected Map<String, EObject> idToEdgeContentMap = new HashMap<String, EObject>();;

	/**
	 * Creates an instance of the resource. 
	 * <!-- begin-user-doc --> 
	 * <!-- end-user-doc -->
	 * 
	 * @param uri
	 *            the URI of the new resource.
	 * @generated
	 */
	public GexfResourceImpl(URI uri) {
		super(uri);
	}

	@Override
	protected EObject getEObjectByID(String id) {
		if (id.charAt(0) == '[') {
			int index = id.indexOf('=');
			if (index > 0) {
				String type = id.substring(1, index);
				String tid = id.substring(index + 1, id.length() - 1);
				if (type.equals("node")) {
					EObject eObject = idToNodeContentMap.get(tid);
					if (eObject != null) {
						return eObject;
					}

					EObject result = null;
					for (TreeIterator<EObject> i = getAllProperContents(getContents()); i.hasNext();) {
						eObject = i.next();
						if (eObject instanceof NodeContent) {
							String nodeId = ((NodeContent) eObject).getId().toString();
							if (nodeId != null) {
								// TODO make robust for changed Id-values in NodeContent; Add notification listener?
								idToNodeContentMap.put(nodeId, eObject);
								if (result == null && nodeId.equals(tid)) {
									result = eObject;
								}
							}
						}
					}
					return result;
				} else if (type.equals("edge")) {
					EObject eObject = idToEdgeContentMap.get(tid);
					if (eObject != null) {
						return eObject;
					}

					EObject result = null;
					for (TreeIterator<EObject> i = getAllProperContents(getContents()); i.hasNext();) {
						eObject = i.next();
						if (eObject instanceof EdgeContent) {
							String edgeId = ((EdgeContent) eObject).getId().toString();
							if (edgeId != null) {
								// TODO make robust for changed Id-values in EdgeContent; Add notification listener?
								idToEdgeContentMap.put(edgeId, eObject);
								if (result == null && edgeId.equals(tid)) {
									result = eObject;
								}
							}
						}
					}
				}
			}
		}
		return super.getEObjectByID(id);
	}

	@Override
	protected XMLHelper createXMLHelper() {
		return new XMLHelperImpl(this) {
			@Override
			public String getHREF(EObject obj) {
				if (obj instanceof NodeContent) {
					return ((NodeContent) obj).getId().toString();
				} else if (obj instanceof EdgeContent) {
					return ((EdgeContent) obj).getId().toString();
				}
				return super.getHREF(obj);
			}
		};
	}

	@Override
	protected XMLLoad createXMLLoad() {
		return new XMLLoadImpl(createXMLHelper()) {
			@Override
			protected DefaultHandler makeDefaultHandler() {
				return new SAXXMLHandler(resource, helper, options) {
					@Override
					protected void setValueFromId(EObject object, EReference eReference, String ids) {
						if (eReference.getEReferenceType() == GexfPackage.Literals.NODE_CONTENT) {
							ids = "[node=" + ids + ']';
						} else if (eReference.getEReferenceType() == GexfPackage.Literals.EDGE_CONTENT) {
							ids = "[edge=" + ids + ']';
						}
						super.setValueFromId(object, eReference, ids);
					}
				};
			}
		};
	}

}