/// <summary>
/// Creates a QueryAtomContainer with the following settings:
/// <c>QueryAtomContainer.Create(container,
/// ExprType.ELEMENT,
/// ExprType.IS_AROMATIC,
/// ExprType.ALIPHATIC_ORDER);
/// </c>>
/// </summary>
/// <param name="container">The AtomContainer that stands as model</param>
/// <returns>The new QueryAtomContainer created from container.</returns>
public static QueryAtomContainer CreateAnyAtomForPseudoAtomQueryContainer(IAtomContainer container)
{
return(QueryAtomContainer.Create(container,
ExprType.Element,
ExprType.IsAromatic,
ExprType.AliphaticOrder));
}
public static QueryAtomContainer CreateSymbolChargeIDQueryContainer(IAtomContainer container)
{
var queryContainer = new QueryAtomContainer();
for (int i = 0; i < container.Atoms.Count; i++)
{
queryContainer.Atoms.Add(new SymbolChargeIDQueryAtom(container.Atoms[i]));
}
foreach (var bond in container.Bonds)
{
int index1 = container.Atoms.IndexOf(bond.Begin);
int index2 = container.Atoms.IndexOf(bond.End);
if (bond.IsAromatic)
{
var qbond = new QueryBond(queryContainer.Atoms[index1],
queryContainer.Atoms[index2],
ExprType.IsAromatic);
queryContainer.Bonds.Add(qbond);
}
else
{
QueryBond qbond = new QueryBond(queryContainer.Atoms[index1],
queryContainer.Atoms[index2],
ExprType.Order,
bond.Order.Numeric())
{
Order = bond.Order // backwards compatibility
};
queryContainer.Bonds.Add(qbond);
}
}
return(queryContainer);
}
/// <summary>
/// Creates a <see cref="QueryAtomContainer"/> with the following settings:
/// <c>QueryAtomContainer.Create(container,
/// ExprType.ELEMENT,
/// ExprType.FORMAL_CHARGE,
/// ExprType.IS_AROMATIC,
/// ExprType.ORDER);</c>
/// </summary>
/// <param name="container">The <see cref="IAtomContainer"/> that stands as model</param>
/// <returns>The new <see cref="QueryAtomContainer"/> created from container.</returns>
public static QueryAtomContainer CreateSymbolAndChargeQueryContainer(IAtomContainer container)
{
return(QueryAtomContainer.Create(container,
ExprType.Element,
ExprType.FormalCharge,
ExprType.IsAromatic,
ExprType.Order));
}
public void Test12DimethylBenzene()
{
var builder = CDK.Builder;
IAtomContainer molecule = builder.NewAtomContainer();
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.Atoms.Add(builder.NewAtom("C"));
molecule.AddBond(molecule.Atoms[0], molecule.Atoms[1], BondOrder.Single);
molecule.AddBond(molecule.Atoms[1], molecule.Atoms[2], BondOrder.Double);
molecule.AddBond(molecule.Atoms[2], molecule.Atoms[3], BondOrder.Single);
molecule.AddBond(molecule.Atoms[3], molecule.Atoms[4], BondOrder.Double);
molecule.AddBond(molecule.Atoms[4], molecule.Atoms[5], BondOrder.Single);
molecule.AddBond(molecule.Atoms[5], molecule.Atoms[0], BondOrder.Double);
molecule.AddBond(molecule.Atoms[0], molecule.Atoms[6], BondOrder.Single);
molecule.AddBond(molecule.Atoms[1], molecule.Atoms[7], BondOrder.Single);
// 2,3-dimethyl-1,3-butadiene matches
IAtomContainer query1 = builder.NewAtomContainer();
query1.Atoms.Add(builder.NewAtom("C"));
query1.Atoms.Add(builder.NewAtom("C"));
query1.Atoms.Add(builder.NewAtom("C"));
query1.Atoms.Add(builder.NewAtom("C"));
query1.Atoms.Add(builder.NewAtom("C"));
query1.Atoms.Add(builder.NewAtom("C"));
query1.AddBond(query1.Atoms[0], query1.Atoms[1], BondOrder.Single);
query1.AddBond(query1.Atoms[1], query1.Atoms[2], BondOrder.Double);
query1.AddBond(query1.Atoms[3], query1.Atoms[0], BondOrder.Double);
query1.AddBond(query1.Atoms[0], query1.Atoms[4], BondOrder.Single);
query1.AddBond(query1.Atoms[1], query1.Atoms[5], BondOrder.Single);
QueryAtomContainer queryContainer1 = QueryAtomContainerCreator.CreateSymbolAndBondOrderQueryContainer(query1);
Assert.IsTrue(new UniversalIsomorphismTester().IsSubgraph(molecule, queryContainer1));
// 2,3-dimethyl-2-butene does not match
IAtomContainer query2 = builder.NewAtomContainer();
query2.Atoms.Add(builder.NewAtom("C"));
query2.Atoms.Add(builder.NewAtom("C"));
query2.Atoms.Add(builder.NewAtom("C"));
query2.Atoms.Add(builder.NewAtom("C"));
query2.Atoms.Add(builder.NewAtom("C"));
query2.Atoms.Add(builder.NewAtom("C"));
query2.AddBond(query2.Atoms[0], query2.Atoms[1], BondOrder.Double);
query2.AddBond(query2.Atoms[1], query2.Atoms[2], BondOrder.Single);
query2.AddBond(query2.Atoms[3], query2.Atoms[0], BondOrder.Single);
query2.AddBond(query2.Atoms[0], query2.Atoms[4], BondOrder.Single);
query2.AddBond(query2.Atoms[1], query2.Atoms[5], BondOrder.Single);
QueryAtomContainer queryContainer2 = QueryAtomContainerCreator.CreateSymbolAndBondOrderQueryContainer(query2);
Assert.IsFalse(new UniversalIsomorphismTester().IsSubgraph(molecule, queryContainer2));
}
/// <summary>
/// Creates a <see cref="QueryAtomContainer"/> with the following settings:
/// <c>QueryAtomContainer.Create(container,
/// Expr.Type.ALIPHATIC_ELEMENT,
/// Expr.Type.AROMATIC_ELEMENT,
/// Expr.Type.IS_AROMATIC,
/// Expr.Type.ALIPHATIC_ORDER,
/// Expr.Type.STEREOCHEMISTRY);</c>
/// </summary>
/// <param name="container">The <see cref="IAtomContainer"/> that stands as model</param>
/// <returns>The new <see cref="QueryAtomContainer"/> created from container.</returns>
public static QueryAtomContainer CreateBasicQueryContainer(IAtomContainer container)
{
return(QueryAtomContainer.Create(container,
ExprType.AliphaticElement,
ExprType.AromaticElement,
ExprType.IsAromatic,
ExprType.AliphaticOrder,
ExprType.Stereochemistry));
}
/// <summary>
/// Creates a QueryAtomContainer with the following settings:
/// <c>
/// // aromaticity = true
/// QueryAtomContainer.Create(container, ExprType.IS_AROMATIC);
/// // aromaticity = false
/// QueryAtomContainer.Create(container);
/// </c>
/// </summary>
/// <remarks>
/// This method thus allows the user to search based only on connectivity.
/// </remarks>
/// <param name="container">The AtomContainer that stands as the model</param>
/// <param name="aromaticity">option flag</param>
/// <returns>The new QueryAtomContainer</returns>
public static QueryAtomContainer CreateAnyAtomAnyBondContainer(IAtomContainer container, bool aromaticity)
{
if (aromaticity)
{
return(QueryAtomContainer.Create(container, ExprType.IsAromatic));
}
else
{
return(QueryAtomContainer.Create(container));
}
}
/// <summary>
/// Create a query from a molecule and a provided set of expressions. The
/// molecule is converted and any features specified in the <paramref name="opts"/>
/// will be matched.
/// </summary>
/// <remarks>
/// A good starting point is the following options:
/// <include file='IncludeExamples.xml' path='Comments/Codes[@id="NCDK.Isomorphisms.Matchers.QueryAtomContainer_Example.cs+Create1"]/*' />
/// Specifying <see cref="ExprType.Degree"/> (or <see cref="ExprType.TotalDegree"/> +
/// <see cref="ExprType.ImplicitHCount"/>) means the molecule will not match as a
/// substructure.
/// <include file='IncludeExamples.xml' path='Comments/Codes[@id="NCDK.Isomorphisms.Matchers.QueryAtomContainer_Example.cs+Create2"]/*' />
/// The <see cref="ExprType.RingBondCount"/> property is useful for locking in
/// ring systems. Specifying the ring bond count on benzene means it will
/// not match larger ring systems (e.g. naphthalenee) but can still be
/// substituted.
/// <include file='IncludeExamples.xml' path='Comments/Codes[@id="NCDK.Isomorphisms.Matchers.QueryAtomContainer_Example.cs+Create3"]/*' />
/// Note that <see cref="ExprType.FormalCharge"/>,
/// <see cref="ExprType.ImplicitHCount"/>, and <see cref="ExprType.Isotope"/> are ignored
/// if <see langword="null"/>. Explicitly setting these to zero (only required for Isotope from
/// SMILES) forces their inclusion.
/// <include file='IncludeExamples.xml' path='Comments/Codes[@id="NCDK.Isomorphisms.Matchers.QueryAtomContainer_Example.cs+Create4"]/*' />
/// Please note not all <see cref="ExprType"/>s are currently supported, if you
/// require a specific type that you think is useful please open an issue.
/// </remarks>
/// <param name="mol">the molecule</param>
/// <param name="opts">set of the expr types to match</param>
/// <returns>the query molecule</returns>
public static QueryAtomContainer Create(IAtomContainer mol, params ExprType[] opts)
{
var optset = new HashSet <ExprType>(opts);
var query = new QueryAtomContainer();
var mapping = new CDKObjectMap();
var stereos = new Dictionary <IChemObject, IStereoElement <IChemObject, IChemObject> >();
foreach (var se in mol.StereoElements)
{
stereos[se.Focus] = se;
}
var qstereo = new List <IStereoElement <IChemObject, IChemObject> >();
foreach (var atom in mol.Atoms)
{
var expr = new Expr();
// isotope first
if (optset.Contains(ExprType.Isotope) && atom.MassNumber != null)
{
expr.And(new Expr(ExprType.Isotope, atom.MassNumber.Value));
}
if (atom.AtomicNumber != 0)
{
if (atom.IsAromatic)
{
if (optset.Contains(ExprType.AromaticElement))
{
expr.And(new Expr(ExprType.AromaticElement,
atom.AtomicNumber));
}
else
{
if (optset.Contains(ExprType.IsAromatic))
{
if (optset.Contains(ExprType.Element))
{
expr.And(new Expr(ExprType.AromaticElement,
atom.AtomicNumber));
}
else
{
expr.And(new Expr(ExprType.IsAromatic));
}
}
else if (optset.Contains(ExprType.Element))
{
expr.And(new Expr(ExprType.Element,
atom.AtomicNumber));
}
}
}
else
{
if (optset.Contains(ExprType.AliphaticElement))
{
expr.And(new Expr(ExprType.AliphaticElement,
atom.AtomicNumber));
}
else
{
if (optset.Contains(ExprType.IsAliphatic))
{
if (optset.Contains(ExprType.Element))
{
expr.And(new Expr(ExprType.AliphaticElement,
atom.AtomicNumber));
}
else
{
expr.And(new Expr(ExprType.IsAliphatic));
}
}
else if (optset.Contains(ExprType.Element))
{
expr.And(new Expr(ExprType.Element,
atom.AtomicNumber));
}
}
}
}
if (optset.Contains(ExprType.Degree))
{
expr.And(new Expr(ExprType.Degree, atom.Bonds.Count));
}
if (optset.Contains(ExprType.TotalDegree))
{
expr.And(new Expr(ExprType.Degree, atom.Bonds.Count + atom.ImplicitHydrogenCount.Value));
}
if (optset.Contains(ExprType.IsInRing) ||
optset.Contains(ExprType.IsInChain))
{
expr.And(new Expr(atom.IsInRing ? ExprType.IsInRing : ExprType.IsInChain));
}
if (optset.Contains(ExprType.ImplicitHCount))
{
expr.And(new Expr(ExprType.ImplicitHCount));
}
if (optset.Contains(ExprType.RingBondCount))
{
int rbonds = 0;
foreach (var bond in mol.GetConnectedBonds(atom))
{
if (bond.IsInRing)
{
rbonds++;
}
}
expr.And(new Expr(ExprType.RingBondCount, rbonds));
}
if (optset.Contains(ExprType.FormalCharge) && atom.FormalCharge != null)
{
expr.And(new Expr(ExprType.FormalCharge, atom.FormalCharge.Value));
}
if (stereos.TryGetValue(atom, out IStereoElement <IChemObject, IChemObject> se) &&
se.Class == StereoClass.Tetrahedral &&
optset.Contains(ExprType.Stereochemistry))
{
expr.And(new Expr(ExprType.Stereochemistry, (int)se.Configure));
qstereo.Add(se);
}
var qatom = new QueryAtom(expr);
// backward compatibility for naughty methods that are expecting
// these to be set for a query!
if (optset.Contains(ExprType.Element) ||
optset.Contains(ExprType.AromaticElement) ||
optset.Contains(ExprType.AliphaticElement))
{
qatom.Symbol = atom.Symbol;
}
if (optset.Contains(ExprType.AromaticElement) ||
optset.Contains(ExprType.IsAromatic))
{
qatom.IsAromatic = atom.IsAromatic;
}
mapping.Add(atom, qatom);
query.Atoms.Add(qatom);
}
foreach (var bond in mol.Bonds)
{
var expr = new Expr();
if (bond.IsAromatic &&
(optset.Contains(ExprType.SingleOrAromatic) ||
optset.Contains(ExprType.DoubleOrAromatic) ||
optset.Contains(ExprType.IsAromatic)))
{
expr.And(new Expr(ExprType.IsAromatic));
}
else if ((optset.Contains(ExprType.SingleOrAromatic) ||
optset.Contains(ExprType.DoubleOrAromatic) ||
optset.Contains(ExprType.AliphaticOrder)) && !bond.IsAromatic)
{
expr.And(new Expr(ExprType.AliphaticOrder, bond.Order.Numeric()));
}
else if (bond.IsAromatic && optset.Contains(ExprType.IsAliphatic))
{
expr.And(new Expr(ExprType.IsAliphatic));
}
else if (optset.Contains(ExprType.Order))
{
expr.And(new Expr(ExprType.Order, bond.Order.Numeric()));
}
if (optset.Contains(ExprType.IsInRing) && bond.IsInRing)
{
expr.And(new Expr(ExprType.IsInRing));
}
else if (optset.Contains(ExprType.IsInChain) && !bond.IsInRing)
{
expr.And(new Expr(ExprType.IsInChain));
}
if (stereos.TryGetValue(bond, out IStereoElement <IChemObject, IChemObject> se) &&
optset.Contains(ExprType.Stereochemistry))
{
expr.And(new Expr(ExprType.Stereochemistry, (int)se.Configure));
qstereo.Add(se);
}
var qbond = new QueryBond(mapping.Get(bond.Begin), mapping.Get(bond.End), expr);
// backward compatibility for naughty methods that are expecting
// these to be set for a query!
if (optset.Contains(ExprType.AliphaticOrder) ||
optset.Contains(ExprType.Order))
{
qbond.Order = bond.Order;
}
if (optset.Contains(ExprType.SingleOrAromatic) ||
optset.Contains(ExprType.DoubleOrAromatic) ||
optset.Contains(ExprType.IsAromatic))
{
qbond.IsAromatic = bond.IsAromatic;
}
mapping.Add(bond, qbond);
query.Bonds.Add(qbond);
}
foreach (var se in qstereo)
{
query.StereoElements.Add((IStereoElement <IChemObject, IChemObject>)se.Clone(mapping));
}
return(query);
}
/// <summary>
/// Creates a <see cref="QueryAtomContainer"/> with the following settings:
/// <c>QueryAtomContainer.Create(container,
/// ExprType.ELEMENT,
/// ExprType.ORDER);</c>
/// </summary>
/// <param name="container">The AtomContainer that stands as model</param>
/// <returns>The new QueryAtomContainer created from container.</returns>
public static QueryAtomContainer CreateSymbolAndBondOrderQueryContainer(IAtomContainer container)
{
return(QueryAtomContainer.Create(container,
ExprType.Element,
ExprType.Order));
}
public static IAtomContainer SuppressQueryHydrogens(IAtomContainer mol)
{
// pre-checks
foreach (var atom in mol.Atoms)
{
if (!(AtomRef.Deref(atom) is QueryAtom))
{
throw new ArgumentException("Non-query atoms found!", nameof(mol));
}
}
foreach (var bond in mol.Bonds)
{
if (!(BondRef.Deref(bond) is QueryBond))
{
throw new ArgumentException("Non-query bonds found!", nameof(mol));
}
}
var plainHydrogens = new CDKObjectMap();
foreach (var atom in mol.Atoms)
{
int hcnt = 0;
foreach (var nbor in mol.GetConnectedAtoms(atom))
{
var qnbor = (QueryAtom)AtomRef.Deref(nbor);
if (mol.GetConnectedBonds(nbor).Count() == 1 &&
IsSimpleHydrogen(qnbor.Expression))
{
hcnt++;
plainHydrogens.Set(nbor, atom);
}
}
if (hcnt > 0)
{
var qatom = (QueryAtom)AtomRef.Deref(atom);
var e = qatom.Expression;
var hexpr = new Expr();
for (int i = 0; i < hcnt; i++)
{
hexpr.And(new Expr(ExprType.TotalHCount, i).Negate());
}
e.And(hexpr);
}
}
// nothing to do
if (!plainHydrogens.Any())
{
return(mol);
}
var res = new QueryAtomContainer();
foreach (var atom in mol.Atoms)
{
if (!plainHydrogens.ContainsKey(atom))
{
res.Atoms.Add(atom);
}
}
foreach (var bond in mol.Bonds)
{
if (!plainHydrogens.ContainsKey(bond.Begin) &&
!plainHydrogens.ContainsKey(bond.End))
{
res.Bonds.Add(bond);
}
}
foreach (var se in mol.StereoElements)
{
res.StereoElements.Add((IStereoElement <IChemObject, IChemObject>)se.Clone(plainHydrogens));
}
return(res);
}
