public static String Serialize(Resource resource, IEnumerable <Option> query, Boolean recursive)
{
StringBuilder linkFormat = new StringBuilder();
// skip hidden and empty root in recursive mode, always skip non-matching resources
if ((!resource.Hidden && (resource.Name.Length > 0) || !recursive) &&
Matches(resource, query))
{
linkFormat.Append("<")
.Append(resource.Path)
.Append(">");
foreach (LinkAttribute attr in resource.Attributes)
{
linkFormat.Append(Separator);
attr.Serialize(linkFormat);
}
}
if (recursive)
{
foreach (Resource sub in resource.GetSubResources())
{
String next = Serialize(sub, query, true);
if (next.Length > 0)
{
if (linkFormat.Length > 3)
{
linkFormat.Append(Delimiter);
}
linkFormat.Append(next);
}
}
}
return(linkFormat.ToString());
}
private static Boolean Matches(Resource resource, IEnumerable <Option> query)
{
if (resource == null)
{
return(false);
}
if (query == null)
{
return(true);
}
foreach (Option q in query)
{
String s = q.StringValue;
Int32 delim = s.IndexOf('=');
if (delim == -1)
{
// flag attribute
if (resource.GetAttributes(s).Count > 0)
{
return(true);
}
}
else
{
String attrName = s.Substring(0, delim);
String expected = s.Substring(delim + 1);
if (attrName.Equals(LinkFormat.Link))
{
if (expected.EndsWith("*"))
{
return(resource.Path.StartsWith(expected.Substring(0, expected.Length - 1)));
}
else
{
return(resource.Path.Equals(expected));
}
}
foreach (LinkAttribute attr in resource.GetAttributes(attrName))
{
String actual = attr.Value.ToString();
// get prefix length according to "*"
Int32 prefixLength = expected.IndexOf('*');
if (prefixLength >= 0 && prefixLength < actual.Length)
{
// reduce to prefixes
expected = expected.Substring(0, prefixLength);
actual = actual.Substring(0, prefixLength);
}
// handle case like rt=[Type1 Type2]
if (actual.IndexOf(' ') > -1)
{
foreach (String part in actual.Split(' '))
{
if (part.Equals(expected))
{
return(true);
}
}
}
if (expected.Equals(actual))
{
return(true);
}
}
}
}
return(false);
}
private static Boolean Matches(Resource resource, IEnumerable<Option> query)
{
if (resource == null)
return false;
if (query == null)
return true;
foreach (Option q in query)
{
String s = q.StringValue;
Int32 delim = s.IndexOf('=');
if (delim == -1)
{
// flag attribute
if (resource.GetAttributes(s).Count > 0)
return true;
}
else
{
String attrName = s.Substring(0, delim);
String expected = s.Substring(delim + 1);
if (attrName.Equals(LinkFormat.Link))
{
if (expected.EndsWith("*"))
return resource.Path.StartsWith(expected.Substring(0, expected.Length - 1));
else
return resource.Path.Equals(expected);
}
foreach (LinkAttribute attr in resource.GetAttributes(attrName))
{
String actual = attr.Value.ToString();
// get prefix length according to "*"
Int32 prefixLength = expected.IndexOf('*');
if (prefixLength >= 0 && prefixLength < actual.Length)
{
// reduce to prefixes
expected = expected.Substring(0, prefixLength);
actual = actual.Substring(0, prefixLength);
}
// handle case like rt=[Type1 Type2]
if (actual.IndexOf(' ') > -1)
{
foreach (String part in actual.Split(' '))
{
if (part.Equals(expected))
return true;
}
}
if (expected.Equals(actual))
return true;
}
}
}
return false;
}
public static String Serialize(Resource resource, IEnumerable<Option> query, Boolean recursive)
{
StringBuilder linkFormat = new StringBuilder();
// skip hidden and empty root in recursive mode, always skip non-matching resources
if ((!resource.Hidden && (resource.Name.Length > 0) || !recursive)
&& Matches(resource, query))
{
linkFormat.Append("<")
.Append(resource.Path)
.Append(">");
foreach (LinkAttribute attr in resource.Attributes)
{
linkFormat.Append(Separator);
attr.Serialize(linkFormat);
}
}
if (recursive)
{
foreach (Resource sub in resource.GetSubResources())
{
String next = Serialize(sub, query, true);
if (next.Length > 0)
{
if (linkFormat.Length > 3)
linkFormat.Append(Delimiter);
linkFormat.Append(next);
}
}
}
return linkFormat.ToString();
}
