/// <summary> Read a Reaction from a file in MDL RXN format
///
/// </summary>
/// <returns> The Reaction that was read from the MDL file.
/// </returns>
private IMolecule readMolecule(IMolecule molecule)
{
AtomTypeFactory atFactory = null;
try
{
atFactory = AtomTypeFactory.getInstance("mol2_atomtypes.xml", molecule.Builder);
}
catch (System.Exception exception)
{
System.String error = "Could not instantiate an AtomTypeFactory";
//logger.error(error);
//logger.debug(exception);
throw new CDKException(error, exception);
}
try
{
System.String line = input.ReadLine();
int atomCount = 0;
int bondCount = 0;
while (line != null)
{
if (line.StartsWith("@<TRIPOS>MOLECULE"))
{
//logger.info("Reading molecule block");
// second line has atom/bond counts?
input.ReadLine(); // disregard the name line
System.String counts = input.ReadLine();
SupportClass.Tokenizer tokenizer = new SupportClass.Tokenizer(counts);
try
{
atomCount = System.Int32.Parse(tokenizer.NextToken());
}
catch (System.FormatException nfExc)
{
System.String error = "Error while reading atom count from MOLECULE block";
//logger.error(error);
//logger.debug(nfExc);
throw new CDKException(error, nfExc);
}
if (tokenizer.HasMoreTokens())
{
try
{
bondCount = System.Int32.Parse(tokenizer.NextToken());
}
catch (System.FormatException nfExc)
{
System.String error = "Error while reading atom and bond counts";
//logger.error(error);
//logger.debug(nfExc);
throw new CDKException(error, nfExc);
}
}
else
{
bondCount = 0;
}
//logger.info("Reading #atoms: ", atomCount);
//logger.info("Reading #bonds: ", bondCount);
//logger.warn("Not reading molecule qualifiers");
}
else if (line.StartsWith("@<TRIPOS>ATOM"))
{
//logger.info("Reading atom block");
for (int i = 0; i < atomCount; i++)
{
line = input.ReadLine().Trim();
SupportClass.Tokenizer tokenizer = new SupportClass.Tokenizer(line);
tokenizer.NextToken(); // disregard the id token
System.String nameStr = tokenizer.NextToken();
System.String xStr = tokenizer.NextToken();
System.String yStr = tokenizer.NextToken();
System.String zStr = tokenizer.NextToken();
System.String atomTypeStr = tokenizer.NextToken();
IAtomType atomType = atFactory.getAtomType(atomTypeStr);
if (atomType == null)
{
atomType = atFactory.getAtomType("X");
//logger.error("Could not find specified atom type: ", atomTypeStr);
}
IAtom atom = molecule.Builder.newAtom("X");
atom.ID = nameStr;
atom.AtomTypeName = atomTypeStr;
atFactory.configure(atom);
try
{
double x = System.Double.Parse(xStr);
double y = System.Double.Parse(yStr);
double z = System.Double.Parse(zStr);
atom.setPoint3d(new Point3d(x, y, z));
}
catch (System.FormatException nfExc)
{
System.String error = "Error while reading atom coordinates";
//logger.error(error);
//logger.debug(nfExc);
throw new CDKException(error, nfExc);
}
molecule.addAtom(atom);
}
}
else if (line.StartsWith("@<TRIPOS>BOND"))
{
//logger.info("Reading bond block");
for (int i = 0; i < bondCount; i++)
{
line = input.ReadLine();
SupportClass.Tokenizer tokenizer = new SupportClass.Tokenizer(line);
tokenizer.NextToken(); // disregard the id token
System.String atom1Str = tokenizer.NextToken();
System.String atom2Str = tokenizer.NextToken();
System.String orderStr = tokenizer.NextToken();
try
{
int atom1 = System.Int32.Parse(atom1Str);
int atom2 = System.Int32.Parse(atom2Str);
double order = 0;
if ("1".Equals(orderStr))
{
order = CDKConstants.BONDORDER_AROMATIC;
}
else if ("2".Equals(orderStr))
{
order = CDKConstants.BONDORDER_DOUBLE;
}
else if ("3".Equals(orderStr))
{
order = CDKConstants.BONDORDER_TRIPLE;
}
else if ("am".Equals(orderStr))
{
order = CDKConstants.BONDORDER_SINGLE;
}
else if ("ar".Equals(orderStr))
{
order = CDKConstants.BONDORDER_AROMATIC;
}
else if ("du".Equals(orderStr))
{
order = CDKConstants.BONDORDER_SINGLE;
}
else if ("un".Equals(orderStr))
{
order = CDKConstants.BONDORDER_SINGLE;
}
else if ("nc".Equals(orderStr))
{
// not connected
order = 0;
}
if (order != 0)
{
molecule.addBond(atom1 - 1, atom2 - 1, order);
}
}
catch (System.FormatException nfExc)
{
System.String error = "Error while reading bond information";
//logger.error(error);
//logger.debug(nfExc);
throw new CDKException(error, nfExc);
}
}
}
line = input.ReadLine();
}
}
catch (System.IO.IOException exception)
{
System.String error = "Error while reading general structure";
//logger.error(error);
//logger.debug(exception);
throw new CDKException(error, exception);
}
return(molecule);
}