public string RegisterNamespace(string namespaceUri, string suggestedPrefix)
{
lock (_lock)
{
ParameterAsserts.AssertSchemaNs(namespaceUri);
ParameterAsserts.AssertPrefix(suggestedPrefix);
if (suggestedPrefix[suggestedPrefix.Length - 1] != ':')
{
suggestedPrefix += ':';
}
if (!Utils.IsXmlNameNs(suggestedPrefix.Substring(0, suggestedPrefix.Length - 1 - 0)))
{
throw new XmpException("The prefix is a bad XML name", XmpErrorCode.BadXml);
}
string registeredPrefix;
if (_namespaceToPrefixMap.TryGetValue(namespaceUri, out registeredPrefix))
{
// Return the actual prefix
return(registeredPrefix);
}
if (_prefixToNamespaceMap.ContainsKey(suggestedPrefix))
{
// the namespace is new, but the prefix is already engaged,
// we generate a new prefix out of the suggested
var generatedPrefix = suggestedPrefix;
for (var i = 1; _prefixToNamespaceMap.ContainsKey(generatedPrefix); i++)
{
generatedPrefix = suggestedPrefix.Substring(0, suggestedPrefix.Length - 1 - 0) + "_" + i + "_:";
}
suggestedPrefix = generatedPrefix;
}
_prefixToNamespaceMap[suggestedPrefix] = namespaceUri;
_namespaceToPrefixMap[namespaceUri] = suggestedPrefix;
// Return the suggested prefix
return(suggestedPrefix);
}
}
