LongLiteralExpr.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.expr;

import org.walkmod.javalang.visitors.GenericVisitor;
import org.walkmod.javalang.visitors.VoidVisitor;

/**
 * @author Julio Vilmar Gesser
 */
public class LongLiteralExpr extends StringLiteralExpr {

   private static final String UNSIGNED_MIN_VALUE = "9223372036854775808";

   protected static final String MIN_VALUE = "-" + UNSIGNED_MIN_VALUE + "L";

   public LongLiteralExpr() {
   }

   public LongLiteralExpr(String value) {
      super(value);
   }

   public LongLiteralExpr(int beginLine, int beginColumn, int endLine, int endColumn, String value) {
      super(beginLine, beginColumn, endLine, endColumn, value);
   }

   @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 final boolean isMinValue() {
      return value != null && value.length() == 20 && value.startsWith(UNSIGNED_MIN_VALUE)
            && (value.charAt(19) == 'L' || value.charAt(19) == 'l');
   }

   public LongLiteralExpr clone() throws CloneNotSupportedException {
      return new LongLiteralExpr(value);
   }
}