add method to fetch the number of keys that exist for a given namespace

PDAL · Mar 29, 2012 · 3a1f122 · 3a1f122
1 parent 49d5d5d
commit 3a1f122
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Showing 2 changed files with 24 additions and 1 deletion.
diff --git a/include/pdal/Metadata.hpp b/include/pdal/Metadata.hpp
@@ -508,7 +508,11 @@ class PDAL_DLL Metadata
     metadata::Entry const& getMetadata(std::size_t index) const;
 
     /// @return the number of metadata::Entry entries in the map
-    inline metadata::EntryMap::size_type getMetadataCount() const { return m_metadata.get<metadata::index>().size(); }
+    inline metadata::EntryMap::size_type size() const { return m_metadata.get<metadata::index>().size(); }
+
+    /// @return the number of metadata::Entry entries in the map 
+    /// for a given namespace
+    metadata::EntryMap::size_type size(std::string const& ns) const;
 
     std::vector<metadata::Entry> getEntriesForNamespace(std::string const& ns) const;
 

diff --git a/src/Metadata.cpp b/src/Metadata.cpp
@@ -436,6 +436,25 @@ std::vector<metadata::Entry> Metadata::getEntriesForNamespace(std::string const&
     return output;
 }
 
+metadata::EntryMap::size_type Metadata::size(std::string const& ns) const
+{
+
+    std::vector<metadata::Entry> output;
+
+    metadata::index_by_namespace const& idx = m_metadata.get<metadata::ns>();
+    metadata::index_by_namespace::iterator it = idx.find(ns);
+    metadata::index_by_namespace::size_type i(0);
+
+    while (it != idx.end())
+    {
+        ++i;
+        ++it;
+    }
+
+    return i;
+}
+
+
 boost::property_tree::ptree Metadata::toPTree() const
 {
     boost::property_tree::ptree tree;