AssertPrefix() public static method

Asserts that a prefix is set.
Prefix is null or empty
public static AssertPrefix ( string prefix ) : void
prefix string a prefix
return void
ParameterAsserts Class Documentation
Ejemplo n.º 1
0
        public string RegisterNamespace(string namespaceUri, string suggestedPrefix)
        {
            ParameterAsserts.AssertSchemaNs(namespaceUri);
            ParameterAsserts.AssertPrefix(suggestedPrefix);

            if (suggestedPrefix[suggestedPrefix.Length - 1] != ':')
            {
                suggestedPrefix += ':';
            }

            if (!Utils.IsXmlNameNs(suggestedPrefix.Substring(0, suggestedPrefix.Length - 1)))
            {
                throw new XmpException("The prefix is a bad XML name", XmpError.BADXML);
            }

            string registeredPrefix = (string)_namespaceToPrefixMap[namespaceUri];
            string registeredNs     = (string)_prefixToNamespaceMap[suggestedPrefix];

            if (registeredPrefix != null)
            {
                // Return the actual prefix
                return(registeredPrefix);
            }
            if (registeredNs != null)
            {
                // the namespace is new, but the prefix is already engaged,
                // we generate a new prefix out of the suggested
                string generatedPrefix = suggestedPrefix;
                for (int i = 1; _prefixToNamespaceMap.Contains(generatedPrefix); i++)
                {
                    generatedPrefix = suggestedPrefix.Substring(0, suggestedPrefix.Length - 1) + "_" + i + "_:";
                }
                suggestedPrefix = generatedPrefix;
            }
            _prefixToNamespaceMap[suggestedPrefix] = namespaceUri;
            _namespaceToPrefixMap[namespaceUri]    = suggestedPrefix;

            // Return the suggested prefix
            return(suggestedPrefix);
        }