def passing_XMLtree(node, oldlayers_Server, newlayers_Server, cur, conn, name_xmlfile):
# Will store the number of Server and URL where store .DTD file
global Nwms, URL_dtd
# If the node not the text (is not between opening and closing tags)
if node.nodeType != node.TEXT_NODE:
if(node.nodeName == "Service"):
# Handler is called subtree tag <Service> and defined number of Server
Nwms = 0
Nwms = parse_subtreeService(node, cur, conn, name_xmlfile)
# Get all the layers of this server already exists in the database
# SELECT Nlayer, Name From KnownLayers WHERE Nwms = Nwms;
condition = {}
condition["Nwms"] = Nwms
oldlayers_Server = BD.ifselect_table(cur, "KnownLayers", "Nlayer", condition, "Name")
# access to the following brother of the node that not to handle the
# node some times
node = node.nextSibling
if(node.nodeName == "Layer"):
# Handler is called subtree tag <Service> and defined number of Server
parse_subtreeLayer(node, newlayers_Server, cur, conn, -1)
# access to the following brother of the node
node = node.nextSibling
if(node.nodeName == "Capability"):
# Update table WMSresources. Find record with primary key = Nwms
# SELECT Nwms, Name FROM WMSresources WHERE Nwms = Nwms;
condition = {}
condition["Nwms"] = Nwms
res = BD.ifselect_table(cur, "WMSresources", "Nwms", condition, "Name")
if res:
# If this Server already exists in the database
# UPDATE WMSresources SET
# Capabilites = 'node.toxml('utf-8').replace("\", "\'\'")'
# WHERE Nwms = Nwms;
BD.updatebd_xmlfield(cur, conn, "WMSresources", "Capabilites", node,\
"Nwms", Nwms)
if(node.nodeType != node.TEXT_NODE):
if node.nodeType == node.DOCUMENT_TYPE_NODE:
# If the node is tag <!DOCTYPE>
global URL_dtd
# URL where store .DTD file
URL_dtd = node.systemId
# Recursively goes through all subnodes
for child in node.childNodes:
oldlayers_Server = passing_XMLtree(child, oldlayers_Server, newlayers_Server,\
cur, conn, name_xmlfile)
# Returns a list of server layers, that were already in the database
return oldlayers_Server
def parse_subtreeLayer(node, newlayer, cur, conn, parent_id):
# Defined number of Server
global Nwms
# Will store the number of Layer
Nlayers = 0
# BD.create_KnownLayers(cur, conn)
# Value_table saved list values for table KnownLayers as (key, value)
value_table = {}
# Saved key Nwms which has this layer
value_table["Nwms"] = Nwms
value_table["Nl_group"] = parent_id
value_table["access_mode"] = ""
# view all nested tags in <Layer> </Layer>
for child in node.childNodes:
if child.nodeName in ["Name", "Title", "Abstract"]:
value_table[child.nodeName] = get_TextfromTag(child.nodeName, child.childNodes)
if child.nodeName in ["LatLonBoundingBox", "BoundingBox"]:
# connect all attributes (k - keys and v - value) in one string "att_string"
atts = child.attributes or {}
att_string = " ".join(["%s=%s " % (k, v) for k, v in atts.items()])
if att_string :
value_table[child.nodeName] = att_string
if child.nodeName == "KeywordList":
# Formed from all the key words one string
keyword = " "
for child1 in child.childNodes:
# Get list keyword via space
if child1.nodeName in ["Keyword"]:
keyword = keyword + " %s " % get_TextfromTag(child1.nodeName,\
child1.childNodes)
value_table[child.nodeName] = keyword
if child.nodeName == "Layer":
# If it have nested layers
if not Nlayers:
# If this layer has not yet been added to the database
# Create values in table KnownLayers and get primary key. Find records
# in table with field "Nwms"
lstfind = {}
lstfind["Nwms"] = Nwms
if "Name" in value_table:
lstfind["Name"] = "\'%s\'"%value_table["Name"]
else:
lstfind["Title"] = "\'%s\'"%value_table["Title"]
# SELECT Nlayer FROM KnownLayers
# WHERE Nwms = lstfind[Nwms] and
# Name = lstfind[Name] and
# Title = lstfind[Title];
# IF this records not exists
# INSERT INTO KnownLayers (Nlayer, Nwms, Nl_group, access_mode,
# Name, Title, Abstract, LatLonBoundingBox, BoundingBox, Keyword)
# VALUES (Nlayer, value_table[Nwms], value_table[Nl_group],
# value_table[access_mode], value_table[Name], value_table[Title],
# value_table[Abstract], value_table[LatLonBoundingBox],
# value_table[BoundingBox], value_table[Keyword]);
Nlayers = BD.crtable(cur, conn, "KnownLayers", "Nlayer",\
value_table, lstfind)
# UPDATE KnownLayers SET
# LayerCapabilites = 'node.toxml('utf-8').replace("\", "\'\'")'
# WHERE Nlayer = Nlayers;
BD.updatebd_xmlfield(cur, conn, "KnownLayers", "LayerCapabilites", node,\
"Nlayer", Nlayers)
# Recurses inner layer with the specified parent as Nlayers
parse_subtreeLayer(child, newlayer, cur, conn, Nlayers)
# Create values in table KnownLayers and get primary key. Find records
# in table with field "Nwms"
if not Nlayers:
# If this layer has not yet been added to the database
lstfind = {}
lstfind["Nwms"] = Nwms
if "Name" in value_table:
lstfind["Name"] = "\'%s\'"%value_table["Name"]
else:
lstfind["Title"] = "\'%s\'"%value_table["Title"]
# Entry is added as described above
Nlayers = BD.crtable(cur, conn, "KnownLayers", "Nlayer",\
value_table, lstfind)
BD.updatebd_xmlfield(cur, conn, "KnownLayers", "LayerCapabilites", node,\
"Nlayer", Nlayers)
# Adds a layer to the list created by layers of servers
newlayer.append(Nlayers)
