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TotalRingConnectionAtom.java
/*
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 *
 *  Copyright (C) 2002-2006  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.
 *  All I ask is that proper credit is given for my work, which includes
 *  - but is not limited to - adding the above copyright notice to the beginning
 *  of your source code files, and to any copyright notice that you may distribute
 *  with programs based on this work.
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 *  This program is distributed in the hope that it will be useful,
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
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package org.openscience.cdk.isomorphism.matchers.smarts;

import org.openscience.cdk.CDKConstants;
import org.openscience.cdk.interfaces.IAtom;

/**
 * This matcher checks the number of ring connections of the checked Atom with
 * other Atom's. This cannot be matched with a unpreprocessed Atom!
 * 
 * @cdk.module  smarts
 * @cdk.githash
 * @cdk.keyword SMARTS 
 */

00044 public class TotalRingConnectionAtom extends SMARTSAtom {
      /**
       * Creates a new instance
       *
       * @param ringConn number of ring connections
       */
00050       public TotalRingConnectionAtom(int ringConn) {
            this.setProperty(CDKConstants.RING_CONNECTIONS, ringConn);
      }

      /**
       * Returns the ring connection of an atom
       * 
       * @param atom
       * @return
       */
00060       private int getRC(IAtom atom) {
            if (atom.getFlag(CDKConstants.ISINRING))
                  return ((Integer) atom.getProperty(CDKConstants.RING_CONNECTIONS))
                              .intValue();
            else
                  return 0;
      }

      /* (non-Javadoc)
       * @see org.openscience.cdk.isomorphism.matchers.smarts.SMARTSAtom#matches(org.openscience.cdk.interfaces.IAtom)
       */
00071       public boolean matches(IAtom atom) {
            return getRC(atom) != 0 && getRC(atom) == getRC(this);
      }

      /* (non-Javadoc)
       * @see org.openscience.cdk.PseudoAtom#toString()
       */
00078       public String toString() {
            return ("TotalRingConnectionAtom(" + getRC(this) + ")");
      }

}

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