/// <summary>
/// Find a metadata tag
/// </summary>
/// <param name="layer">The layer object</param>
/// <param name="key_to_find">the metadata key to search for</param>
/// <returns></returns>
public static string FindMetadata(layerObj layer, string key_to_find)
{
string key = layer.getFirstMetaDataKey();
while (key != null)
{
if (key.StartsWith(key_to_find))
{
return(key);
}
key = layer.getNextMetaDataKey(key);
}
return(null);
}
/// <summary>
/// Check whether this layer has a metadata tag
/// </summary>
/// <param name="layer">The layer object</param>
/// <param name="key_to_find">the metadata key to search for</param>
/// <returns></returns>
public static bool HasMetadata(layerObj layer, string key_to_find)
{
string key = layer.getFirstMetaDataKey();
while (key != null)
{
if (key == key_to_find)
{
return(true);
}
key = layer.getNextMetaDataKey(key);
}
return(false);
}
/// <summary>
/// Append a value to an existing metadata or create a new tag if that doesn't exist
/// </summary>
/// <param name="layer">The layer object</param>
/// <param name="key">The metadata key</param>
/// <param name="value">The value to append</param>
/// <param name="value">The separator to be used when appending</param>
public static void AppendMetadata(layerObj layer, string key_to_find, string value, string separator)
{
string key = layer.getFirstMetaDataKey();
while (key != null)
{
if (key == key_to_find)
{
layer.setMetaData(key_to_find, layer.getMetaData(key_to_find) + separator + value);
return;
}
key = layer.getNextMetaDataKey(key);
}
layer.setMetaData(key_to_find, value);
}
/// <summary>
/// Append a value to an existing metadata or create a new tag if that doesn't exist
/// </summary>
/// <param name="layer">The layer object</param>
/// <param name="key">The metadata key</param>
/// <param name="value">The value to append</param>
/// <param name="value">The separator to be used when appending</param>
public static void AppendMetadata(layerObj layer, string key_to_find, string value, string separator)
{
string key = layer.getFirstMetaDataKey();
while (key != null)
{
if (key == key_to_find)
{
layer.setMetaData(key_to_find, layer.getMetaData(key_to_find) + separator + value);
return;
}
key = layer.getNextMetaDataKey(key);
}
layer.setMetaData(key_to_find, value);
}
/// <summary>
/// Check whether this layer has a metadata tag
/// </summary>
/// <param name="layer">The layer object</param>
/// <param name="key_to_find">the metadata key to search for</param>
/// <returns></returns>
public static bool HasMetadata(layerObj layer, string key_to_find)
{
string key = layer.getFirstMetaDataKey();
while (key != null)
{
if (key == key_to_find)
{
return true;
}
key = layer.getNextMetaDataKey(key);
}
return false;
}
/// <summary>
/// Find a metadata tag
/// </summary>
/// <param name="layer">The layer object</param>
/// <param name="key_to_find">the metadata key to search for</param>
/// <returns></returns>
public static string FindMetadata(layerObj layer, string key_to_find)
{
string key = layer.getFirstMetaDataKey();
while (key != null)
{
if (key.StartsWith(key_to_find))
{
return key;
}
key = layer.getNextMetaDataKey(key);
}
return null;
}