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LogicalOperatorAtom.java

/* $Revision: $ $Author: $ $Date: $ 
 *
 * Copyright (C) 2004-2007  The Chemistry Development Kit (CDK) project
 *
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * (or see http://www.gnu.org/copyleft/lesser.html)
 */
package org.openscience.cdk.isomorphism.matchers.smarts;

import org.openscience.cdk.interfaces.IAtom;
import org.openscience.cdk.isomorphism.matchers.IQueryAtom;

/**
 * This class matches a logical operator that connects two query atoms
 *
 * @author Dazhi Jiao
 * @cdk.created 2007-05-10
 * @cdk.module smarts
 * @cdk.keyword SMARTS 
 */
00033 public class LogicalOperatorAtom extends SMARTSAtom {
00034       private static final long serialVersionUID = -5752396252307536738L;

      /**
       * Left child
       */
00039       private IQueryAtom left;

    /**
     * Name of operator
     */
00044     private String operator;

    /**
     * Right child
     */
00049     private IQueryAtom right;

    public IQueryAtom getLeft() {
        return left;
    }

    public String getOperator() {
        return operator;
    }

    public IQueryAtom getRight() {
        return right;
    }

    public void setLeft(IQueryAtom left) {
        this.left = left;
    }

    public void setOperator(String name) {
        this.operator = name;
    }

    public void setRight(IQueryAtom right) {
        this.right = right;
    }
    
    /* (non-Javadoc)
     * @see org.openscience.cdk.isomorphism.matchers.smarts.SMARTSAtom#matches(org.openscience.cdk.interfaces.IAtom)
     */
00078     public boolean matches(IAtom atom) {
      boolean val = false;
      boolean matchesLeft = left.matches(atom);
      if (right != null) {
            if ("and".equals(operator) && matchesLeft) {
                  boolean matchesRight = right.matches(atom);
                  val = matchesLeft && matchesRight;
            } else if ("or".equals(operator)) {
                  boolean matchesRight = right.matches(atom);
                  val = matchesLeft || matchesRight;
            }
      } else {
            if ("not".equals(operator)) {
                  val = (!matchesLeft);
            } else {
                  val = matchesLeft;
            }
      }
      return val;
    }

    /* (non-Javadoc)
     * @see org.openscience.cdk.ChemObject#getFlag(int)
     */
00102     public boolean getFlag(int flagType) {
      boolean val = false;
      boolean leftFlag = left.getFlag(flagType);
      if (right != null) {
            if ("and".equals(operator) && leftFlag) {
                  boolean rightFlag = right.getFlag(flagType);
                  val = leftFlag && rightFlag;
            } else if ("or".equals(operator)) {
                  boolean rightFlag = right.getFlag(flagType);
                  val = leftFlag || rightFlag;
            }
      } else {
            if ("not".equals(operator)) {
                  val = (!leftFlag);
            } else {
                  val = leftFlag;
            }
      }
      return val;
    }
}

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