public void AddChild(TreeGraph node)
{
children.Add(node);
}
public TreeGraph CreateGraph()
{
CheckErrorState();
// Create the header node
TreeGraph headerGraph = new TreeGraph("header", headerId);
// Get the header area
IArea headerArea = store.GetArea(headerId);
headerArea.Position = 8;
// Read the versions list,
long versionListRef = headerArea.ReadInt8();
// Create the version node
TreeGraph versions_node = new TreeGraph("versions_list", versionListRef);
// Set this as a child to the header
headerGraph.AddChild(versions_node);
// Read the versions list area
// magic(int), versions count(int), list of version id objects.
IArea versArea = store.GetArea(versionListRef);
if (versArea.ReadInt4() != 0x01433)
throw new IOException("Incorrect magic value 0x01433");
int vers_count = versArea.ReadInt4();
// For each id from the versions area, read in the associated VersionInfo
// object into the 'vers' array.
for (int i = 0; i < vers_count; ++i) {
long vInfoRef = versArea.ReadInt8();
// Set up the information in our node
TreeGraph vInfoGraph = new TreeGraph("version", vInfoRef);
// Read in the version information node
IArea vInfoArea = store.GetArea(vInfoRef);
int magic = vInfoArea.ReadInt4();
int ver = vInfoArea.ReadInt4();
long versionId = vInfoArea.ReadInt8();
long rootNodeRef = vInfoArea.ReadInt8();
vInfoGraph.SetProperty("magic", magic);
vInfoGraph.SetProperty("ver", ver);
vInfoGraph.SetProperty("version_id", versionId);
// Make the deleted area list into a property
int deleted_area_count = vInfoArea.ReadInt4();
if (deleted_area_count > 0) {
for (int n = 0; n < deleted_area_count; ++n) {
long delNodeRef = vInfoArea.ReadInt8();
vInfoGraph.AddChild(new TreeGraph("delete", delNodeRef));
}
}
// Add the child node (the root node of the version graph).
vInfoGraph.AddChild(CreateRootGraph(Key.Head, rootNodeRef));
// Add this to the version list node
versions_node.AddChild(vInfoGraph);
}
// Return the header node
return headerGraph;
}
private TreeGraph CreateRootGraph(Key leftKey, long reference)
{
// The node being returned
TreeGraph graph;
// Open the area
IArea area = store.GetArea(reference);
// What type of node is this?
short nodeType = area.ReadInt2();
// The version
short ver = area.ReadInt2();
if (nodeType == LeafType) {
// Read the reference count,
long refCount = area.ReadInt4();
// The number of bytes in the leaf
int leafSize = area.ReadInt4();
// Set up the leaf node object
graph = new TreeGraph("leaf", reference);
graph.SetProperty("ver", ver);
graph.SetProperty("key", leftKey.ToString());
graph.SetProperty("reference_count", refCount);
graph.SetProperty("leaf_size", leafSize);
} else if (nodeType == BranchType) {
// The data size area containing the children information
int childDataSize = area.ReadInt4();
long[] data = new long[childDataSize];
for (int i = 0; i < childDataSize; ++i) {
data[i] = area.ReadInt8();
}
// Create the TreeBranch object to query it
TreeBranch branch = new TreeBranch(reference, data, childDataSize);
// Set up the branch node object
graph = new TreeGraph("branch", reference);
graph.SetProperty("ver", ver);
graph.SetProperty("key", leftKey.ToString());
graph.SetProperty("branch_size", branch.ChildCount);
// Recursively add each child into the tree
for (int i = 0; i < branch.ChildCount; ++i) {
long child_ref = branch.GetChild(i);
// If the ref is a special node, skip it
if ((child_ref & 0x01000000000000000L) != 0) {
// Should we record special nodes?
} else {
Key newLeftKey = (i > 0) ? branch.GetKey(i) : leftKey;
TreeGraph bn = new TreeGraph("child_meta", reference);
bn.SetProperty("extent", branch.GetChildLeafElementCount(i));
graph.AddChild(bn);
graph.AddChild(CreateRootGraph(newLeftKey, child_ref));
}
}
} else {
throw new IOException("Unknown node type: " + nodeType);
}
return graph;
}
public void AddChild(TreeGraph node)
{
children.Add(node);
}
