From 201cb61f842ef50a19438e3872ba22e588fa1afc Mon Sep 17 00:00:00 2001
From: Mathias Froehlich <Mathias.Froehlich@web.de>
Date: Sun, 11 Nov 2012 16:54:43 +0100
Subject: [PATCH] hla: Use HLADataElementIndices for HLAInteractionClass.

---
 simgear/hla/HLAInteractionClass.cxx | 38 +++++++++++++++++++++++++++++
 simgear/hla/HLAInteractionClass.hxx |  4 +++
 2 files changed, 42 insertions(+)

diff --git a/simgear/hla/HLAInteractionClass.cxx b/simgear/hla/HLAInteractionClass.cxx
index afe9bd9f..a9693d98 100644
--- a/simgear/hla/HLAInteractionClass.cxx
+++ b/simgear/hla/HLAInteractionClass.cxx
@@ -159,6 +159,44 @@ HLAInteractionClass::getIndexPathPair(const std::string& path) const
     return getIndexPathPair(HLADataElement::toStringPathPair(path));
 }
 
+bool
+HLAInteractionClass::getDataElementIndex(HLADataElementIndex& dataElementIndex, const std::string& path) const
+{
+    if (path.empty()) {
+        SG_LOG(SG_NETWORK, SG_ALERT, "HLAObjectClass: failed to parse empty element path!");
+        return false;
+    }
+    std::string::size_type len = std::min(path.find_first_of("[."), path.size());
+    unsigned index = 0;
+    while (index < getNumParameters()) {
+        if (path.compare(0, len, getParameterName(index)) == 0)
+            break;
+        ++index;
+    }
+    if (getNumParameters() <= index) {
+        SG_LOG(SG_NETWORK, SG_ALERT, "HLAObjectClass: faild to parse data element index \"" << path << "\":\n"
+               << "Parameter \"" << path.substr(0, len) << "\" not found in object class \""
+               << getName() << "\"!");
+        return false;
+    }
+    if (!getParameterDataType(index)) {
+        SG_LOG(SG_NETWORK, SG_ALERT, "HLAObjectClass: faild to parse data element index \"" << path << "\":\n"
+               << "Undefined parameter data type in variant record data type \""
+               << getParameterName(index) << "\"!");
+        return false;
+    }
+    dataElementIndex.push_back(index);
+    return getParameterDataType(index)->getDataElementIndex(dataElementIndex, path, len);
+}
+
+HLADataElementIndex
+HLAInteractionClass::getDataElementIndex(const std::string& path) const
+{
+    HLADataElementIndex dataElementIndex;
+    getDataElementIndex(dataElementIndex, path);
+    return dataElementIndex;
+}
+
 bool
 HLAInteractionClass::subscribe()
 {
diff --git a/simgear/hla/HLAInteractionClass.hxx b/simgear/hla/HLAInteractionClass.hxx
index 34a25c7e..211f3dea 100644
--- a/simgear/hla/HLAInteractionClass.hxx
+++ b/simgear/hla/HLAInteractionClass.hxx
@@ -62,6 +62,10 @@ public:
     HLADataElement::IndexPathPair getIndexPathPair(const HLADataElement::StringPathPair& stringPathPair) const;
     HLADataElement::IndexPathPair getIndexPathPair(const std::string& path) const;
 
+    /// Get the attribute data element index for the given path, return true if successful
+    bool getDataElementIndex(HLADataElementIndex& dataElementIndex, const std::string& path) const;
+    HLADataElementIndex getDataElementIndex(const std::string& path) const;
+
     virtual bool subscribe();
     virtual bool unsubscribe();
 
-- 
2.39.5