bool GraphMLParser::readData(
GraphAttributes &GA,
const node &v, const XmlTagObject &nodeData)
{
XmlAttributeObject *keyId;
nodeData.findXmlAttributeObjectByName("key", keyId);
if(keyId == NULL) {
cerr << "ERROR: Node data does not have a key.\n";
return false;
}
const long attrs = GA.attributes();
std::stringstream value(nodeData.getValue());
switch (graphml::toAttribute(m_attrName[keyId->getValue()])) {
case graphml::a_nodeLabel:
if(attrs & GraphAttributes::nodeLabel) {
value >> GA.label(v);
}
break;
case graphml::a_x:
if(attrs & GraphAttributes::nodeGraphics) {
value >> GA.x(v);
}
bool Parser::readNodes(Graph &G, GraphAttributes *GA)
{
List<XmlTagObject *> nodeTags;
m_nodesTag->findSonXmlTagObjectByName("node", nodeTags);
for(XmlTagObject *obj : nodeTags) {
const XmlTagObject &nodeTag = *obj;
XmlAttributeObject *idAttr;
nodeTag.findXmlAttributeObjectByName("id", idAttr);
if(!idAttr) {
OGDF_ERROR("node is missing an attribute "
<< "(line " << nodeTag.getLine() << ").");
return false;
}
const node v = G.newNode();
m_nodeId[idAttr->getValue()] = v;
if(GA) {
readAttributes(*GA, v, nodeTag);
}
}
return true;
}
bool Parser::readCluster(
Graph &G, ClusterGraph &C, ClusterGraphAttributes *CA, cluster rootCluster,
const XmlTagObject &rootTag)
{
List<XmlTagObject *> nodeTags;
rootTag.findSonXmlTagObjectByName("node", nodeTags);
for(XmlTagObject *obj : nodeTags) {
const XmlTagObject &nodeTag = *obj;
XmlAttributeObject *idAttr;
nodeTag.findXmlAttributeObjectByName("id", idAttr);
if(!idAttr) {
OGDF_ERROR("node is missing an attribute "
<< "(line " << nodeTag.getLine() << ").");
}
// Node is a cluster iff it contains other nodes.
XmlTagObject *nodesTag;
nodeTag.findSonXmlTagObjectByName("nodes", nodesTag);
if(nodesTag) {
// Node tag found, therefore it is a cluster.
const cluster c = C.newCluster(rootCluster);
m_clusterId[idAttr->getValue()] = c;
if(!readCluster(G, C, CA, c, *nodesTag)) {
return false;
}
} else {
// Node tag not found, therefore it is "normal" node.
const node v = G.newNode();
C.reassignNode(v, rootCluster);
m_nodeId[idAttr->getValue()] = v;
if(CA) {
readAttributes(*CA, v, nodeTag);
}
}
}
return true;
}