I'm using boost::property_tree
. The documentation is very vague and overall unhelpful for the most part. Looking at the source/examples didn't help that much, either.
What I'm wondering is the following:
<VGHL>
<StringTable>
<Language>EN</Language>
<DataPath>..\\Data\\Resources\\Strings\\stringtable.bst</DataPath>
</StringTable>
</VGHL>
How can I iterate over all the elements at the current level? If I do this:
read_xml(fin, bifPropTree);
VGHL::String tablePath;
BOOST_FOREACH(boost::property_tree::wiptree::value_type &v,
bifPropTree.get_child(L"VGHL.StringTable"))
{
m_StringTable->ParseEntry(v.second, tablePath);
}
In ParseEntry
I try this:
VGHL::String langName = stringTree.get<VGHL::String>(L"StringTable.Language");
Results in an exception (not doesn't exist). I've also tried this:
VGHL::String langName = stringTree.get<VGHL::String>(L"Language");
Same problem.
From my understanding when I call ParseEntry
I am passing a reference to the tree at that node.
Is there any way to deal with this, when I have multiple entries of StringTable
using property tree?
ParseEntry receives a reference to each of the children nodes of the current level. So, you cannot ask the values using the node name, because you already have a child node. The node name is stored in v.first.
You can iterate over all the elements at a given level using get_child to select the level and then BOOST_FOREACH to iterate. Each iterator will be a pair representing the name of the node and the node data:
using boost::property_tree::wiptree;
wiptree &iterationLevel = bifPropTree.get_child(L"VGHL.StringTable");
BOOST_FOREACH(wiptree::value_type &v, iterationLevel)
{
wstring name = v.first;
wstring value = v.second.get<wstring>(L"");
wcout << L"Name: " << name << L", Value: " << value.c_str() << endl;
}
This code would print:
Name: Language, Value: EN
Name: DataPath, Value: ..\\Data\\Resources\\Strings\\stringtable.bst
If you do not want to iterate, you can select the node level and then look for the nodes using their name:
wiptree &iterationLevel = bifPropTree.get_child(L"VGHL.StringTable");
wstring valueLang = iterationLevel.get<wstring>(L"Language");
wstring valuePath = iterationLevel.get<wstring>(L"DataPath");
wcout << valueLang << endl << valuePath << endl;
This code would print:
EN
..\\Data\\Resources\\Strings\\stringtable.bst
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