/// <summary>
/// Construct the wrapper.
/// Also validates the memory calculation.
/// </summary>
/// <param name="fileName">Path to the data set file.</param>
/// <param name="properties">Comma separated list of properties to include in the results</param>
/// <param name="validate">Set to true to validate the memory calculation.</param>
public TrieWrapper(string fileName, string properties, bool validate)
{
_provider = new Trie.Provider(fileName, properties, validate);
_fileName = fileName;
}
/// <summary>
/// Construct the wrapper.
/// </summary>
/// <param name="fileName">The full path to the file containing device data.</param>
/// <param name="properties">Comma seperated list of properties to include in the results.</param>
public TrieWrapper(string fileName, string properties)
{
_provider = new Trie.Provider(fileName, properties);
_fileName = fileName;
}
/// <summary>
/// Construct the wrapper.
/// </summary>
/// <param name="fileName">The full path to the file containing device data.</param>
/// <param name="properties">Comma seperated list of properties to include in the results.</param>
public TrieWrapper(string fileName, string properties)
{
lock (_lock)
{
// Check the file exists before trying to load it.
var info = new FileInfo(fileName);
if (info.Exists == false)
{
throw new ArgumentException(String.Format(
"File '{0}' can not be found.",
info.FullName), "fileName");
}
// If a file has already been loaded then check it's the
// same name as the one being used for this instance. Only
// one file can be loaded at a time.
if (_fileName != null &&
_fileName.Equals(fileName) == false)
{
throw new ArgumentException(String.Format(
"Trie has already been initialised with file name '{0}'. " +
"Multiple providers with different file sources can not be created.",
_fileName), "fileName");
}
// Only initialise the memory if the file has not already
// been loaded into memory.
if (_fileName == null)
{
_provider = new Trie.Provider(info.FullName, properties);
// Initialise the list of property names and indexes.
var propertyIndex = 0;
foreach (var property in _provider.getAvailableProperties())
{
PropertyIndexes.Add(property, propertyIndex);
propertyIndex++;
}
// Initialise the list of http header names.
foreach (var httpHeader in _provider.getHttpHeaders())
{
HttpHeaders.Add(httpHeader);
}
HttpHeaders.Sort();
_fileName = fileName;
}
// Increase the number of wrapper instances that have
// been created. Used when the wrapper is disposed to
// determine if the memory used should be released.
_instanceCount++;
}
}
