RedundantParenthesisRule.java :  » Code-Analyzer » hammurapi-3.20.0.3 » org » hammurapi » inspectors » Java Open Source

/*
 * Hammurapi
 * Automated Java code review system. 
 * Copyright (C) 2004  Hammurapi Group
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * URL: http://www.hammurapi.org
 * e-Mail: support@hammurapi.biz
 */
package org.hammurapi.inspectors;

import org.hammurapi.InspectorBase;

import com.pavelvlasov.jsel.LanguageElement;
import com.pavelvlasov.jsel.expressions.Expression;
import com.pavelvlasov.jsel.expressions.Parenthesis;
import com.pavelvlasov.review.SourceMarker;

/**
 * @author Pavel Vlasov  
 * @version $Revision: 1.5 $
 */
public class RedundantParenthesisRule extends InspectorBase {
  
  public void visit(Parenthesis parenthesis) {
    if (parenthesis.getOperands().isEmpty()) {
      return;
    }
    
    Class parent=((LanguageElement) parenthesis).getParent().getClass();
    if (parent.getInterfaces().length==0) {
      return;
    }
    parent=parent.getInterfaces()[0];
    if (parent.getInterfaces().length==0) {
      return;
    }
    parent=parent.getInterfaces()[0];
    
    Expression firstOperand = parenthesis.getOperand(0);
    Class operand=firstOperand.getClass();
    if (operand.getInterfaces().length==0) {
      return;
    }
    operand=operand.getInterfaces()[0];    
    if (operand.getInterfaces().length==0) {
      return;
    }
    operand=operand.getInterfaces()[0];
    
    if (parent.isAssignableFrom(operand)) {
      context.reportViolation((SourceMarker) parenthesis);
    }
  }
}