/// <summary>
/// Converts an NTS attributes table to an attributes collection.
/// </summary>
public static IAttributeCollection ToAttributesCollection(this IAttributesTable table)
{
if (table == null)
{
return(null);
}
var attributes = new AttributeCollection();
var name = table.GetNames();
var values = table.GetValues();
for (var i = 0; i < name.Length; i++)
{
var value = values[i];
if (value == null)
{
attributes.AddOrReplace(name[i], string.Empty);
}
else
{
attributes.AddOrReplace(name[i], value.ToInvariantString());
}
}
return(attributes);
}
private static void AddAttributes(List <uint> tags, Dictionary <string, uint> keys,
Dictionary <Tile.Value, uint> values, IAttributesTable attributes)
{
if (attributes == null || attributes.Count == 0)
{
return;
}
var aKeys = attributes.GetNames();
var aValues = attributes.GetValues();
for (var a = 0; a < aKeys.Length; a++)
{
var key = aKeys[a];
if (string.IsNullOrEmpty(key))
{
continue;
}
var tileValue = ToTileValue(aValues[a]);
if (tileValue == null)
{
continue;
}
tags.Add(keys.AddOrGet(key));
tags.Add(values.AddOrGet(tileValue));
}
}
/// <summary>
/// Returns true if the attribute table contains the given attribute and it's value.
/// </summary>
public static bool Contains(this IAttributesTable attributes, string key, object value)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
var names = attributes.GetNames();
for (var i = 0; i < names.Length; i++)
{
if (names[i].Equals(key))
{
if (attributes.GetValues()[i] != null)
{
return(attributes.GetValues()[i].ToInvariantString().Equals(value));
}
}
}
return(false);
}
/// <summary>
/// Returns true if the given table contains the given attribute with the given value.
/// </summary>
public static bool Contains(this IAttributesTable table, string name, object value)
{
var names = table.GetNames();
for (var i = 0; i < names.Length; i++)
{
if (names[i] == name)
{
return(value.Equals(table.GetValues()[i]));
}
}
return(false);
}
/// <summary>
/// Tries to get a value from the attribute table.
/// </summary>
public static bool TryGetValue(this IAttributesTable table, string name, out object value)
{
var names = table.GetNames();
for (var i = 0; i < names.Length; i++)
{
if (names[i] == name)
{
value = table.GetValues()[i];
return(true);
}
}
value = null;
return(false);
}
/// <summary>
/// Returns the first element that satisfies the given predicate or throw an exception with the given message if nothing is found.
/// </summary>
public static object FirstOrException(this IAttributesTable attributes, Func <string, bool> isFirst, string message)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
var names = attributes.GetNames();
for (var i = 0; i < names.Length; i++)
{
if (isFirst(names[i]))
{
return(attributes.GetValues()[i]);
}
}
throw new Exception(message);
}
private static void AddAttributes(List <uint> tags, Dictionary <string, uint> keys,
Dictionary <string, uint> values, IAttributesTable attributes)
{
if (attributes == null)
{
return;
}
var aKeys = attributes.GetNames();
var aValues = attributes.GetValues();
for (var a = 0; a < aKeys.Length; a++)
{
var key = aKeys[a];
var value = aValues[a];
tags.Add(keys.AddOrGet(key));
tags.Add(values.AddOrGet(value?.ToString()));
}
}
/// <summary>
/// Tries to get the value for the given key.
/// </summary>
public static bool TryGetValue(this IAttributesTable attributes, string key, out object value)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
var names = attributes.GetNames();
for (var i = 0; i < names.Length; i++)
{
if (names[i].Equals(key))
{
value = attributes.GetValues()[i];
return(true);
}
}
value = null;
return(false);
}
/// <summary>
/// Tries to get a value as a string from the attribute table.
/// </summary>
public static bool TryGetValueAsString(this IAttributesTable table, string name, out string value)
{
var names = table.GetNames();
for (var i = 0; i < names.Length; i++)
{
if (names[i] == name)
{
var objValue = table.GetValues()[i];
if (objValue == null)
{
value = null;
}
else
{
value = objValue.ToInvariantString();
}
return(true);
}
}
value = null;
return(false);
}
