public VisualGraph importFromXML(File file) {
// holds the current key of the graph
int currentKey = this.getKeyGenerator();
myNodes = new ArrayList<VisualNode>();
String nKey = null;
String nName = null;
String nType = null;
int nID = 0;
String eKey = null;
String eName = null;
String eType = null;
String eFromNode = null;
String eToNode = null;
String nSQLDefinition = null;
try {
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse(file);
// normalize text representation
doc.getDocumentElement().normalize();
NodeList listOfNodes = doc.getElementsByTagName("HNodes");
Element NodesElement = (Element) listOfNodes.item(0);
listOfNodes = NodesElement.getElementsByTagName("HNode");
for (int s = 0; s < listOfNodes.getLength(); s++) {
Node firstNode = listOfNodes.item(s);
if (firstNode.getNodeType() == Node.ELEMENT_NODE) {
Element firstNodeElement = (Element) firstNode;
double nodeX = new Double(firstNodeElement.getAttribute("x"));
double nodeY = new Double(firstNodeElement.getAttribute("y"));
// -------
NodeList KeyList = firstNodeElement.getElementsByTagName("Key");
Element KeyElement = (Element) KeyList.item(0);
NodeList textKeyList = KeyElement.getChildNodes();
nKey = ((Node) textKeyList.item(0)).getNodeValue();
// -------
NodeList NameList = firstNodeElement.getElementsByTagName("Name");
Element NameElement = (Element) NameList.item(0);
NodeList textNameList = NameElement.getChildNodes();
nName = ((Node) textNameList.item(0)).getNodeValue();
// ----
NodeList TypeList = firstNodeElement.getElementsByTagName("Type");
Element TypeElement = (Element) TypeList.item(0);
NodeList textTypeList = TypeElement.getChildNodes();
nType = ((Node) textTypeList.item(0)).getNodeValue();
/** @author pmanousi ID NOW NOT NEEDED (TopologicalTravel) */
// NodeList IDList = firstNodeElement.getElementsByTagName("ID");
// Element IDElement = (Element)IDList.item(0);
// NodeList textIDList = IDElement.getChildNodes();
// nID = Integer.parseInt(((Node)textIDList.item(0)).getNodeValue());
// ----
NodeList SQLDefinitionList = firstNodeElement.getElementsByTagName("SQLDefinition");
Element SQLDefinitionElement = (Element) SQLDefinitionList.item(0);
if (SQLDefinitionElement != null) {
NodeList textSQLDefinitionList = SQLDefinitionElement.getChildNodes();
nSQLDefinition = ((Node) textSQLDefinitionList.item(0)).getNodeValue();
} else nSQLDefinition = "";
// add node
VisualNode v = new VisualNode();
v.setName(nName);
v.setType(NodeType.valueOf(nType));
// v.setLocation(new Point2D.Double(nodeX,nodeY));
this.setLocation(v, new Point2D.Double(nodeX, nodeY));
v.setSQLDefinition(nSQLDefinition);
this.addVertex(v);
// shift node key by current key
this.setKey(v, currentKey + new Integer(nKey));
v.ID = nID;
myNodes.add(v);
} // end of if clause
} // end of for loop for nodes
NodeList listOfEdges = doc.getElementsByTagName("HEdges");
Element EdgesElement = (Element) listOfEdges.item(0);
listOfEdges = EdgesElement.getElementsByTagName("HEdge");
for (int s = 0; s < listOfEdges.getLength(); s++) {
Node firstEdge = listOfEdges.item(s);
if (firstEdge.getNodeType() == Node.ELEMENT_NODE) {
Element firstEdgeElement = (Element) firstEdge;
// -------
NodeList KeyList = firstEdgeElement.getElementsByTagName("Key");
Element KeyElement = (Element) KeyList.item(0);
NodeList textKeyList = KeyElement.getChildNodes();
eKey = ((Node) textKeyList.item(0)).getNodeValue();
// -------
NodeList NameList = firstEdgeElement.getElementsByTagName("Name");
Element NameElement = (Element) NameList.item(0);
NodeList textNameList = NameElement.getChildNodes();
eName = ((Node) textNameList.item(0)).getNodeValue();
// ----
NodeList TypeList = firstEdgeElement.getElementsByTagName("Type");
Element TypeElement = (Element) TypeList.item(0);
NodeList textTypeList = TypeElement.getChildNodes();
eType = ((Node) textTypeList.item(0)).getNodeValue();
NodeList FromNodeList = firstEdgeElement.getElementsByTagName("FromNode");
Element FromNodeElement = (Element) FromNodeList.item(0);
NodeList textFromNodeList = FromNodeElement.getChildNodes();
eFromNode = ((Node) textFromNodeList.item(0)).getNodeValue();
NodeList ToNodeList = firstEdgeElement.getElementsByTagName("ToNode");
Element ToNodeElement = (Element) ToNodeList.item(0);
NodeList textToNodeList = ToNodeElement.getChildNodes();
eToNode = ((Node) textToNodeList.item(0)).getNodeValue();
// add edge
VisualEdge e =
new VisualEdge(
eName,
EdgeType.toEdgeType(eType),
this.findVertex(currentKey + new Integer(eFromNode)),
this.findVertex(currentKey + new Integer(eToNode)));
this.addEdge(e);
this.setKey(e, currentKey + new Integer(eKey));
} // end of if clause
} // end of for loop for edges
/* // find the policies (if any exists) for nodes
NodeList listOfPolicies = doc.getElementsByTagName("HPolicies");
Element PoliciesElement = (Element)listOfPolicies.item(0);
listOfPolicies = PoliciesElement.getElementsByTagName("HPolicy");
if (listOfPolicies.getLength()>0) {
for(int i=0; i<listOfPolicies.getLength() ; i++){
Node firstPolicy = listOfPolicies.item(i);
if(firstPolicy.getNodeType() == Node.ELEMENT_NODE){
Element firstPolicyElement = (Element)firstPolicy;
//-------
NodeList HNodeList = firstPolicyElement.getElementsByTagName("HNode");
Element HNodeElement = (Element)HNodeList.item(0);
NodeList textHNodeList = HNodeElement.getChildNodes();
String nHNode = ((Node)textHNodeList.item(0)).getNodeValue();
//-------
NodeList HEventList = firstPolicyElement.getElementsByTagName("HEvent");
Element HEventElement = (Element)HEventList.item(0);
NodeList HEventNodeList = HEventElement.getElementsByTagName("HEventNode");
Element HEventNodeElement = (Element)HEventNodeList.item(0);
NodeList textHEventNodeList = HEventNodeElement.getChildNodes();
String nHEventNode = ((Node)textHEventNodeList.item(0)).getNodeValue();
NodeList HEventTypeList = HEventElement.getElementsByTagName("HEventType");
Element HEventTypeElement = (Element)HEventTypeList.item(0);
NodeList textHEventTypeList = HEventTypeElement.getChildNodes();
String nHEventType = ((Node)textHEventTypeList.item(0)).getNodeValue();
//----
NodeList HPolicyTypeList = firstPolicyElement.getElementsByTagName("HPolicyType");
Element HPolicyTypeElement = (Element)HPolicyTypeList.item(0);
NodeList textHPolicyTypeList = HPolicyTypeElement.getChildNodes();
String nHPolicyType = ((Node)textHPolicyTypeList.item(0)).getNodeValue();
VisualNode HNode = this.findVertex(currentKey+new Integer(nHNode));
VisualNode HEventNode = this.findVertex(currentKey+new Integer(nHEventNode));
EventType HEventType = EventType.toEventType(nHEventType);
PolicyType HPolicyType = PolicyType.toPolicyType(nHPolicyType);
HNode.addPolicy(HEventType, HEventNode, HPolicyType);
}//end of if clause
}//end of for loop for policies
}//end of if policies exist
//get events
NodeList listOfEvents = doc.getElementsByTagName("HEvents");
Element EventsElement = (Element)listOfEvents.item(0);
listOfEvents = EventsElement.getElementsByTagName("HEvent");
if (listOfEvents.getLength()>0) {
for(int i=0; i<listOfEvents.getLength() ; i++){
Node firstEvent = listOfEvents.item(i);
if(firstEvent.getNodeType() == Node.ELEMENT_NODE){
Element firstEventElement = (Element)firstEvent;
//-------
NodeList HNodeList = firstEventElement.getElementsByTagName("HNode");
Element HNodeElement = (Element)HNodeList.item(0);
NodeList textHNodeList = HNodeElement.getChildNodes();
String nHNode = ((Node)textHNodeList.item(0)).getNodeValue();
//-------
NodeList HEventNodeList = firstEventElement.getElementsByTagName("HEventNode");
Element HEventNodeElement = (Element)HEventNodeList.item(0);
NodeList textHEventNodeList = HEventNodeElement.getChildNodes();
String nHEventNode = ((Node)textHEventNodeList.item(0)).getNodeValue();
//-------
NodeList HEventTypeList = firstEventElement.getElementsByTagName("HEventType");
Element HEventTypeElement = (Element)HEventTypeList.item(0);
NodeList textHEventTypeList = HEventTypeElement.getChildNodes();
String nHEventType = ((Node)textHEventTypeList.item(0)).getNodeValue();
VisualNode HNode = this.findVertex(currentKey+new Integer(nHNode));
VisualNode HEventNode = this.findVertex(currentKey+new Integer(nHEventNode));
EventType HEventType = EventType.toEventType(nHEventType);
HNode.addEvent(HEventType);
}
}//end of for loop for events
}//end of if events exist
*/
// get the last element - graph keygenerator
NodeList keyGen = doc.getElementsByTagName("HKeyGen");
Element keyGenElement = (Element) keyGen.item(0);
NodeList textkeyGen = keyGenElement.getChildNodes();
nKey = ((Node) textkeyGen.item(0)).getNodeValue();
// set the key
this.setKeyGenerator(currentKey + new Integer(nKey));
return this;
} catch (SAXParseException err) {
System.out.println(
"** Parsing error" + ", line " + err.getLineNumber() + ", uri " + err.getSystemId());
System.out.println(" " + err.getMessage());
return null;
} catch (SAXException e) {
Exception x = e.getException();
((x == null) ? e : x).printStackTrace();
return null;
} catch (Throwable t) {
t.printStackTrace();
return null;
}
}
