/// <summary>
/// Converts a Well-known Text representation to a <c>Geometry</c>.
/// </summary>
/// <param name="reader">
/// A Reader which will return a "Geometry Tagged Text"
/// string (see the OpenGIS Simple Features Specification).
/// </param>
/// <returns>A <c>Geometry</c> read from <c>reader</c>.
/// </returns>
public IGeometry Read(TextReader reader)
{
StreamTokenizer tokenizer = new StreamTokenizer(reader);
ArrayList tokens = new ArrayList();
tokenizer.Tokenize(tokens); // Read directly all tokens
index = 0; // Reset pointer to start of tokens
try
{
return ReadGeometryTaggedText(tokens);
}
catch (IOException e)
{
throw new ParseException(e.ToString());
}
}
internal IList<Token> Tokenize(TextReader reader)
{
var tokenizer = new StreamTokenizer(reader);
IList<Token> tokens = new List<Token>();
tokenizer.Tokenize(tokens); // Read directly all tokens
return tokens;
}
/// <summary>
/// Simple test of some ParseUtil methods.
/// </summary>
/// <returns>bool - true for all passed, false otherwise</returns>
public static bool TestSelf()
{
Logger log = new Logger("ParseUtil: TestSelf");
log.Info("Starting...");
StreamTokenizer tokenizer = new StreamTokenizer();
tokenizer.Verbosity = VerbosityLevel.Warn;
// FindMatch
ArrayList alist = new ArrayList();
tokenizer.TokenizeString("{ [ ] '}' }", alist);
foreach(Token t in alist) log.Debug("Token = {0}", t);
Token[] tarray = (Token[])alist.ToArray(typeof(Token));
int i = 0;
if (!FindMatch(tarray, ref i, '{'))
{
log.Error("FindMatch failed to match { char");
return(false);
}
if (i != 4)
{
log.Error("FindMatch got the wrong answer {0}", i);
return(false);
}
else log.Info("FindMatch worked.");
//
// try BuildArray
//
ArrayList tokens = new ArrayList();
tokenizer.TokenizeString("1 2 3 4 5", tokens);
foreach(Token t in tokens) log.Debug("Token = {0}", t);
i = 0;
Int16[] shorts = (short[])BuildArray(tokens, ref i, typeof(Int16), null,
-1, log);
if (shorts == null)
{
log.Error("Unable to BuildArray of shorts.");
return(false);
}
log.Info("Parsed shorts:");
foreach(Int16 s in shorts)
{
log.Write("{0}, ", s);
}
log.WriteLine(String.Empty);
//
// try BuildArray of floats, char terminated
//
tokens.Clear();
tokenizer.TokenizeString("1 2 ; 3 4", tokens);
foreach(Token t in tokens) log.Debug("Token = {0}", t);
i = 0;
Single[] floats = (float[])BuildArray(tokens, ref i, typeof(Single),
new CharToken(';'), -1, log);
if (floats == null)
{
log.Error("Unable to BuildArray of floats.");
return(false);
}
log.Info("Parsed floats:");
foreach(float f in floats)
{
log.Write("{0}, ", f);
}
log.WriteLine(String.Empty);
if (i != 2)
{
log.Error("BuildArray left i = {0} which is incorrect");
return(false);
}
//
// try BuildArray on high-precision floats
//
tokens.Clear();
float f1 = 1.23456f;
float f2 = 2.34567f;
tokenizer.TokenizeString(String.Format("{0:f6} {1:f6}", f1,f2), tokens);
foreach(Token t in tokens) log.Debug("Token = {0}", t);
i = 0;
floats = (float[])BuildArray(tokens, ref i, typeof(Single),
null, -1, log);
if (floats == null)
{
log.Error("Unable to BuildArray of floats.");
return(false);
}
log.Info("Parsed floats:");
foreach(float f in floats)
{
log.Write("{0}, ", f);
}
log.WriteLine(String.Empty);
if (floats[0] != f1)
{
log.Error("BuildArray produced float {0:f6} instead of {1:f6}",
floats[0], f1);
return(false);
}
//
// try BuildArray of chars, maxLength terminated
//
log.Info("Chars, terminated by maxLength");
tokens.Clear();
tokenizer.TokenizeString("12 2 ; 3 4", tokens);
foreach(Token t in tokens) log.Debug("Token = {0}", t);
i = 0;
char[] chars = (char[])BuildArray(tokens, ref i, typeof(Char),
null, 3, log);
if (chars == null)
{
log.Error("Unable to BuildArray of chars.");
return(false);
}
log.Info("Parsed chars:");
foreach(char f in chars)
{
log.Write("{0}, ", f);
}
log.WriteLine(String.Empty);
if (i != 4)
{
log.Error("BuildArray left i = {0} which is incorrect", i);
return(false);
}
//
// try BuildArray of hex numbers
//
log.Info("Hex numbers");
tokens.Clear();
tokenizer.Settings.ParseHexNumbers = true;
tokenizer.TokenizeString("0xfff, 0xffe", tokens);
foreach(Token t in tokens) log.Debug("Token = {0}", t);
i = 0;
ushort[] ushorts = (ushort[])BuildArray(tokens, ref i, typeof(ushort),
null, 3, log);
if (ushorts == null)
{
log.Error("Unable to BuildArray of ushorts.");
return(false);
}
log.Info("Parsed ushorts:");
foreach(ushort us in ushorts)
{
log.Write("{0}, ", us);
}
log.WriteLine(String.Empty);
// if (i != 4)
// {
// log.Error("BuildArray left i = {0} which is incorrect", i);
// return(false);
// }
log.Info("All PASSED");
return(true);
}
/// <summary>
/// Converts a Well-known Text representation to a <c>Geometry</c>.
/// </summary>
/// <param name="reader">
/// A Reader which will return a "Geometry Tagged Text"
/// string (see the OpenGIS Simple Features Specification).
/// </param>
/// <returns>A <c>Geometry</c> read from <c>reader</c>.
/// </returns>
public IGeometry Read(TextReader reader)
{
/*
var tokens = Tokenize(reader);
StreamTokenizer tokenizer = new StreamTokenizer(reader);
IList<Token> tokens = new List<Token>();
tokenizer.Tokenize(tokens); // Read directly all tokens
*/
//_index = 0; // Reset pointer to start of tokens
try
{
var enumerator = new StreamTokenizer(reader).GetEnumerator();
enumerator.MoveNext();
return ReadGeometryTaggedText(enumerator);
}
catch (IOException e)
{
throw new GeoAPI.IO.ParseException(e.ToString());
}
}
/// <summary>
/// Tests if reader is at EOF.
/// </summary>
private static bool IsAtEndOfFile(StreamReader bufferedReader)
{
var position = bufferedReader.BaseStream.Position;
var tokenizer = new StreamTokenizer(bufferedReader);
Token t;
if (!tokenizer.NextToken(out t) || t is EofToken)
return true;
bufferedReader.BaseStream.Seek(position, SeekOrigin.Begin);
return false;
}
