my xml looks like:
<?xml version="1.0"?>
<Grid id = 1>
<Setup id = "1">
<Group name = "DrawingRoom">
<Light id = "1">
<name>Light1</name>
<type>ben</type>
<index>1</index>
</Light>
<Light id = "2">
<name>Light2</name>
<type>crux</type>
<index>2</index>
</Light>
<Light id = "3">
<name>Light3</name>
<type>let</type>
<index>3</index>
</Light>
</Group>
<Group name = "BedRoom">
<Light id = "1">
<name>Light1</name>
<type>let</type>
<index>4</index>
</Light>
</Group>
</Setup>
<Setup id = "2">
<Group name = "ClubRoom">
<Light id = "1">
<name>Light1</name>
<type>let</type>
<index>1</index>
</Light>
</Group>
</Setup>
</Grid>
Issue appears when I try to populate hashmap while parsing the xml. I am using four hashmap each for holding different level of information. So the final hashmap consists of hashmap from lower level like setup, group and light with attributes of each level are the keys of respective maps of that level.
public HashMap<String,String> lightContent = new HashMap<String,String>();
public HashMap<String, HashMap<String,String>> groupContent = new HashMap<String, HashMap<String,String>>();
public HashMap<String, HashMap<String, HashMap<String,String>>> setupContent = new HashMap<String, HashMap<String, HashMap<String,String>>>();
public HashMap<String, HashMap<String, HashMap<String, HashMap<String,String>>>> gridContent = new HashMap<String, HashMap<String, HashMap<String, HashMap<String,String>>>>();
During parsing, the problem comes that as hashmap gets updated so is the automatically the hashmap containing those hashmap. So, previous entries are lost when hashmap at lower levels are overwritten.
I understand that "key" in hashmap points to location of value(here it is another hashmap). Hence, m confused, what next could be done to retrieve all the xml data to hashmap. Appreciate your help in this regard !!
I am afraid, cant use any external library for this purpose. Here is the function:
public void getSetupConfiguration()
{
try {
File fXmlFile = new File("D:\\SetupConfig.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
NodeList nodeList = doc.getChildNodes();
if (doc.hasChildNodes())
{
for (int count1 = 0; count1 < nodeList.getLength(); count1++)
{
System.out.println(nodeList.getLength());
Node gridNode = nodeList.item(count1);
if (gridNode.getNodeType() == Node.ELEMENT_NODE)
{
String presentNodeName = gridNode.getNodeName();
// get node name and value
// System.out.println("\nNode Name =" + presentNodeName);
if (presentNodeName.equalsIgnoreCase("Grid"))
{
if (gridNode.hasChildNodes())
{
Node setupNode = gridNode.getFirstChild();
while (setupNode != null)
{
if (setupNode.getNodeType() == Node.ELEMENT_NODE)
{
System.out.println(setupNode.getNodeName());
//Getting group
Node groupNode = setupNode.getFirstChild();
while (groupNode != null)
{
if (groupNode.getNodeType() == Node.ELEMENT_NODE)
{
System.out.println(groupNode.getNodeName());
// Getting lights
Node lightNode = groupNode.getFirstChild();
while (lightNode != null)
{
if (lightNode.getNodeType() == Node.ELEMENT_NODE)
{
System.out.println(lightNode.getNodeName());
// Getting individual lights
Node lights = lightNode.getFirstChild();
while (lights != null)
{
if (lights.getNodeType() == Node.ELEMENT_NODE)
{
lightContent.put(lights.getNodeName(), lights.getTextContent());
System.out.println("aaa");
}
lights = lights.getNextSibling();
}
NamedNodeMap lightMap = lightNode.getAttributes();
String lightId = "";
// To get id of Light element
for (int i = 0; i < lightMap.getLength(); i++ )
{
Node lightItem = lightMap.item(i);
lightId = lightItem.getNodeValue();
}
groupContent.put(lightId, lightContent);
System.out.println(groupContent);
}
lightNode = lightNode.getNextSibling();
}// Populating Light Node Ends
NamedNodeMap groupMap = groupNode.getAttributes();
String groupName = "";
for (int i = 0; i < groupMap.getLength(); i++ )
{
Node lightItem = groupMap.item(i);
groupName = lightItem.getNodeValue();
}
setupContent.put(groupName, groupContent);
System.out.println(setupContent);
}
lightContent.clear();
groupContent.clear();
System.out.println(lightContent);
groupNode = groupNode.getNextSibling();
}
}
if (setupNode.getNodeType() == Node.ELEMENT_NODE)
{
NamedNodeMap setupMap = setupNode.getAttributes();
String setUpId = "";
for (int i = 0; i < setupMap.getLength(); i++ )
{
Node lightItem = setupMap.item(i);
setUpId = lightItem.getNodeValue();
}
gridContent.put(setUpId, setupContent);
System.out.println(gridContent);
setupContent.clear();
}
setupNode = setupNode.getNextSibling();
}
}
// gridNode = gridNode.getNextSibling();
}
}
}
}
System.out.println(gridContent);
}
catch (Exception e)
{
e.printStackTrace();
}
System.out.println("Wow");
}
}
Thanks is advance !!
