AssertStmt.java

/* 
  Copyright (C) 2013 Raquel Pau and Albert Coroleu.
 
 Walkmod 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 3 of the License, or
 (at your option) any later version.
 
 Walkmod 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 Walkmod.  If not, see <http://www.gnu.org/licenses/>.*/
package org.walkmod.javalang.ast.stmt;

import java.util.LinkedList;
import java.util.List;

import org.walkmod.javalang.ast.Node;
import org.walkmod.javalang.ast.expr.Expression;
import org.walkmod.javalang.visitors.GenericVisitor;
import org.walkmod.javalang.visitors.VoidVisitor;

/**
 * @author Julio Vilmar Gesser
 */
public final class AssertStmt extends Statement {

   private Expression check;

   private Expression msg;

   public AssertStmt() {
   }

   public AssertStmt(Expression check) {
      setCheck(check);
   }

   public AssertStmt(Expression check, Expression msg) {
      setCheck(check);
      setMessage(msg);
   }

   public AssertStmt(int beginLine, int beginColumn, int endLine, int endColumn, Expression check, Expression msg) {
      super(beginLine, beginColumn, endLine, endColumn);
      setCheck(check);
      setMessage(msg);
   }

   @Override
   public boolean removeChild(Node child) {
      boolean result = false;
      if (child != null) {
         if (check == child) {
            check = null;
            result = true;
         }

         if (!result) {
            if (msg == child) {
               msg = null;
               result = true;
            }
         }
      }
      if(result){
         updateReferences(child);
      }
      return result;
   }

   @Override
   public List<Node> getChildren() {
      List<Node> children = new LinkedList<Node>();
      if (check != null) {
         children.add(check);
      }
      if (msg != null) {
         children.add(msg);
      }
      return children;
   }

   @Override
   public <R, A> R accept(GenericVisitor<R, A> v, A arg) {
      if (!check()) {
         return null;
      }
      return v.visit(this, arg);
   }

   @Override
   public <A> void accept(VoidVisitor<A> v, A arg) {
      if (check()) {
         v.visit(this, arg);
      }
   }

   public Expression getCheck() {
      return check;
   }

   public Expression getMessage() {
      return msg;
   }

   public void setCheck(Expression check) {
      if (this.check != null) {
         updateReferences(this.check);
      }
      this.check = check;
      setAsParentNodeOf(check);
   }

   public void setMessage(Expression msg) {
      if (this.msg != null) {
         updateReferences(this.msg);
      }
      this.msg = msg;
      setAsParentNodeOf(msg);
   }

   @Override
   public boolean replaceChildNode(Node oldChild, Node newChild) {
      boolean updated = false;
      if (oldChild == check) {
         setCheck((Expression) newChild);
         updated = true;
      }
      if (!updated) {
         if (oldChild == msg) {
            setMessage((Expression) newChild);
            updated = true;
         }
      }
      return updated;
   }

   @Override
   public AssertStmt clone() throws CloneNotSupportedException {
      return new AssertStmt(clone(check), clone(msg));
   }
}