/* $RCSfile$ * $Author: sushil_ronghe $ * $Date: 2007-04-17 20:49:16 +0200 (Tue, 17 Apr 2007) $ * $Revision: 8208 $ *  * Copyright (C) 2004-2007  The Chemistry Development Kit (CDK) project * * Contact: cdk-devel@lists.sourceforge.net *  * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 * of the License, or (at your option) any later version. *  * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU Lesser General Public License for more details. *  * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */package org.openscience.cdk.isomorphism.matchers.smarts;import org.openscience.cdk.interfaces.IAtom;/** * This matcher checks the number of implicit hydrogens of the Atom. * * @cdk.module extra */public class ImplicitHCountAtom extends SMARTSAtom {        private static final long serialVersionUID = 6752937431492584928L;        private int hCount;        public ImplicitHCountAtom(int hCount) {        this.hCount = hCount;    }    public ImplicitHCountAtom(){        this.hCount = Default;    }       public int getOperator(){        if(ID!=null && this.hCount==Default)            return 1;        else if(ID!=null && this.hCount!=Default)            return 2;        else if(this.hCount==Default)            return 3;        else if(this.hCount!=Default)            return 4;        return 5;    }    private int getIMPH(IAtom atom){        return atom.getHydrogenCount();    }    public boolean matches(IAtom atom) {        switch(getOperator()){            case 1:return defaultOperatorCheck(atom);            case 2:return nonDefaultOperatorCheck(atom);            case 3:return defaultCheck(atom);            case 4:return nonDefaultCheck(atom);            default:return false;        }    };    private boolean defaultCheck(IAtom atom){        if(getIMPH(atom)!=0)return true;        return false;    }    private boolean nonDefaultCheck(IAtom atom){        if(getIMPH(atom)!=0 && getIMPH(atom)==this.hCount) return true;        return false;    }    private boolean defaultOperatorCheck(IAtom atom){        if(getIMPH(atom)==0)return true;        return false;    }    private boolean nonDefaultOperatorCheck(IAtom atom){        if(getIMPH(atom)!=0 && getIMPH(atom)!=this.hCount) return false;        return false;    }    public String toString() {		StringBuffer s = new StringBuffer();		s.append("ImplicitHCountAtom(");        s.append(this.hashCode() + ", ");		s.append("IH:" + hCount);		s.append(")");		return s.toString();    }}