static void Main(string[] args)
{
Console.WriteLine("Reading from a file");
Console.WriteLine("--------------------------");
Node node = Node.FromFile ("testRead.yaml");
Console.WriteLine (node);
Console.WriteLine("Reading from a string");
Console.WriteLine("--------------------------");
node = Node.Parse ("- item1\n- item2\n");
Console.WriteLine (node);
Console.WriteLine("Writing to a file");
Console.WriteLine("--------------------------");
node.ToFile ("testWrite.yaml");
Console.WriteLine("Writing to a string");
Console.WriteLine("--------------------------");
string s = node.Write ();
Console.WriteLine( s );
Console.WriteLine("Creating a YAML tree");
Console.WriteLine("--------------------------");
Sequence sequence = new Sequence (
new Node []
{
new Yaml.String ("item 1"),
new Yaml.String ("item 2"),
new Yaml.String ("item 3"),
new Mapping (
new MappingNode []
{
new MappingNode (new Yaml.String ("key 2"), new Yaml.String ("value 1")),
new MappingNode (new Yaml.String ("key 2"), new Yaml.String ("value 2"))
} ),
new Yaml.String ("item 5")
} );
Console.WriteLine (sequence);
Console.WriteLine("Traversing a YAML tree");
Console.WriteLine("--------------------------");
// Iets dat nog moet gebeuren
foreach (Node n in sequence.Nodes)
{
if (n.Type == NodeType.String)
Console.Write ("Found a string: " + ((Yaml.String) n).Content + "\n");
}
}
static void Main(string[] args)
{
// Node node2 = Node.FromFile ("test.yaml");
// Console.WriteLine (node2);
// node2.ToFile ("out.yaml");
/*
Console.WriteLine
(
"ToString: \n" +
node2.Write ()
);
Console.WriteLine
(
"Info: \n" +
node2.Info () .Write ()
);
node2.ToFile ("out.yaml");
node2.Info (). ToFile ("out.yaml");
// */
Sequence sequence = new Sequence ( new Node []
{
new String ("item 1"),
new String ("item 2"),
new String ("item 3"),
new Mapping ( new MappingNode []
{
new MappingNode (new String ("key 2"), new String ("value 1")),
new MappingNode (new String ("key 2"), new String ("value 2"))
} ),
new String ("item 5")
} );
Console.WriteLine (sequence);
foreach (Node s in sequence.Nodes)
{
if (s.Type == NodeType.String)
Console.Write ("Found a string: " + ((String) s) . Content);
}
// */
}
/// <summary> Node info </summary>
public override Node Info()
{
Mapping mapping = new Mapping ();
mapping.AddMappingNode (new String ("kind"), new String ("sequence"));
mapping.AddMappingNode (new String ("type_id"), new String (URI));
Sequence childs = new Sequence ();
foreach (Node child in childNodes)
childs.AddNode (child.Info ());
mapping.AddMappingNode (new String ("value"), childs);
return mapping;
}
/// <summary> Node info </summary>
public override Node Info()
{
Mapping mapping = new Mapping ();
mapping.AddMappingNode (new String ("kind"), new String ("mapping"));
mapping.AddMappingNode (new String ("type_id"), new String (URI));
Mapping childs = new Mapping ();
int i = 0;
foreach (MappingNode child in childNodes)
{
Sequence keyvaluepair = new Sequence ();
keyvaluepair.AddNode (child.Key.Info () );
keyvaluepair.AddNode (child.Value.Info ());
childs.AddMappingNode (new String ("key_" + i), keyvaluepair);
i ++;
}
mapping.AddMappingNode (new String ("value"), childs);
return mapping;
}
/// <summary> Internal parse method </summary>
/// <param name="parseImplicitMappings">
/// Avoids ethernal loops while parsing implicit mappings. Implicit mappings are
/// not rocognized by a leading character. So while trying to parse the key of
/// something we think that could be a mapping, we're sure that if it is a mapping,
/// the key of this implicit mapping is not a mapping itself.
///
/// NOTE: Implicit mapping still belong to unstable code and require the UNSTABLE and
/// IMPLICIT_MAPPINGS preprocessor flags.
/// </param>
/// <param name="stream"></param>
protected static Node Parse (ParseStream stream, bool parseImplicitMappings)
{
// ----------------
// Skip Whitespace
// ----------------
if (! stream.EOF)
{
// Move the firstindentation pointer after the whitespaces of this line
stream.SkipSpaces ();
while (stream.Char == '\n' && ! stream.EOF)
{
// Skip newline and next whitespaces
stream.Next ();
stream.SkipSpaces ();
}
}
// -----------------
// No remaining chars (Null/empty stream)
// -----------------
if (stream.EOF)
return new Null ();
// -----------------
// Explicit type
// -----------------
#if SUPPORT_EXPLICIT_TYPES
stream.BuildLookaheadBuffer ();
char a = '\0', b = '\0';
a = stream.Char; stream.Next ();
b = stream.Char; stream.Next ();
// Starting with !!
if (a == '!' && b == '!' && ! stream.EOF)
{
stream.DestroyLookaheadBuffer ();
// Read the tagname
string tag = "";
while (stream.Char != ' ' && stream.Char != '\n' && ! stream.EOF)
{
tag += stream.Char;
stream.Next ();
}
// Skip Whitespace
if (! stream.EOF)
{
stream.SkipSpaces ();
while (stream.Char == '\n' && ! stream.EOF)
{
stream.Next ();
stream.SkipSpaces ();
}
}
// Parse
Node n;
switch (tag)
{
// Mappings and sequences
// NOTE:
// - sets are mappings without values
// - Ordered maps are ordered sequence of key: value
// pairs without duplicates.
// - Pairs are ordered sequence of key: value pairs
// allowing duplicates.
// TODO: Create new datatypes for omap and pairs
// derived from sequence with a extra duplicate
// checking.
case "seq": n = new Sequence (stream); break;
case "map": n = new Mapping (stream); break;
case "set": n = new Mapping (stream); break;
case "omap": n = new Sequence (stream); break;
case "pairs": n = new Sequence (stream); break;
// Scalars
//
// TODO: do we have to move this to Scalar.cs
// in order to get the following working:
//
// !!str "...": "..."
// !!str "...": "..."
case "timestamp": n = new Timestamp (stream); break;
case "binary": n = new Binary (stream); break;
case "null": n = new Null (stream); break;
case "float": n = new Float (stream); break;
case "int": n = new Integer (stream); break;
case "bool": n = new Boolean (stream); break;
case "str": n = new String (stream); break;
// Unknown data type
default:
throw new Exception ("Incorrect tag '!!" + tag + "'");
}
return n;
}
else
{
stream.RewindLookaheadBuffer ();
stream.DestroyLookaheadBuffer ();
}
#endif
// -----------------
// Sequence
// -----------------
if (stream.Char == '-' || stream.Char == '[')
return new Sequence (stream);
// -----------------
// Mapping
// -----------------
if (stream.Char == '?' || stream.Char == '{')
return new Mapping (stream);
// -----------------
// Try implicit mapping
// -----------------
// This are mappings which are not preceded by a question
// mark. The keys have to be scalars.
#if (UNSTABLE && SUPPORT_IMPLICIT_MAPPINGS)
// NOTE: This code can't be included in Mapping.cs
// because of the way we are using to rewind the buffer.
Node key, val;
if (parseImplicitMappings)
{
// First Key/value pair
stream.BuildLookaheadBuffer ();
stream.StopAt (new char [] {':'});
// Keys of implicit mappings can't be sequences, or other mappings
// just look for scalars
key = Scalar.Parse (stream, false);
stream.DontStop ();
Console.WriteLine ("key: " + key);
// Followed by a colon, so this is a real mapping
if (stream.Char == ':')
{
stream.DestroyLookaheadBuffer ();
Mapping mapping = new Mapping ();
// Skip colon and spaces
stream.Next ();
stream.SkipSpaces ();
// Parse the value
Console.Write ("using buffer: " + stream.UsingBuffer ());
stream.Indent ();
Console.Write ("using buffer: " + stream.UsingBuffer ());
// val = Parse (stream, false);
Console.Write ("<<");
while (!stream.EOF) {Console.Write (stream.Char);stream.Next (true);}
Console.Write (">>");
val = new String (stream);
Console.Write ("using buffer: " + stream.UsingBuffer ());
stream.UnIndent ();
Console.Write ("using buffer: " + stream.UsingBuffer ());
Console.Write ("<<");
while (!stream.EOF) {Console.Write (stream.Char);stream.Next (true);}
Console.Write (">>");
Console.WriteLine ("val: " + val);
mapping.AddMappingNode (key, val);
// Skip possible newline
// NOTE: this can't be done by the drop-newline
// method since this is not the end of a block
while (stream.Char == '\n')
stream.Next (true);
// Other key/value pairs
while (! stream.EOF)
{
stream.StopAt (new char [] {':'} );
stream.Indent ();
key = Scalar.Parse (stream);
stream.UnIndent ();
stream.DontStop ();
Console.WriteLine ("key 2: " + key);
if (stream.Char == ':')
{
// Skip colon and spaces
stream.Next ();
stream.SkipSpaces ();
// Parse the value
stream.Indent ();
val = Parse (stream);
stream.UnIndent ();
Console.WriteLine ("val 2: " + val);
mapping.AddMappingNode (key, val);
}
else // TODO: Is this an error?
{
// NOTE: We can't recover from this error,
// the last buffer has been destroyed, so
// rewinding is impossible.
throw new ParseException (stream,
"Implicit mapping without value node");
}
// Skip possible newline
while (stream.Char == '\n')
stream.Next ();
}
return mapping;
}
stream.RewindLookaheadBuffer ();
stream.DestroyLookaheadBuffer ();
}
#endif
// -----------------
// No known data structure, assume this is a scalar
// -----------------
Scalar scalar = Scalar.Parse (stream);
// Skip trash
while (! stream.EOF)
stream.Next ();
return scalar;
}
