AbstractNTOnlyImplementInterfaceNTs.java

/*
 * ******************************************************************************
 * MontiCore Language Workbench
 * Copyright (c) 2015, MontiCore, All rights reserved.
 *
 * This project 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 3.0 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 project. If not, see <http://www.gnu.org/licenses/>.
 * ******************************************************************************
 */

package de.monticore.grammar.cocos;

import java.util.List;
import java.util.Optional;

import de.monticore.grammar.grammar._ast.ASTAbstractProd;
import de.monticore.grammar.grammar._ast.ASTRuleReference;
import de.monticore.grammar.grammar._cocos.GrammarASTAbstractProdCoCo;
import de.monticore.grammar.symboltable.MCProdSymbol;
import de.se_rwth.commons.logging.Log;

/**
 * Checks that abstract nonterminals only implement interface nonterminals.
 *
 * @author KH
 */
public class AbstractNTOnlyImplementInterfaceNTs implements GrammarASTAbstractProdCoCo {
  
  public static final String ERROR_CODE = "0xA2106";
  
  public static final String ERROR_MSG_FORMAT = " The abstract nonterminal %s must not implement the nonterminal %s. "
      +
      "Abstract nonterminals may only implement interface nonterminals.";
  
  @Override
  public void check(ASTAbstractProd a) {
    if (!a.getSuperInterfaceRule().isEmpty()) {
      List<ASTRuleReference> interfaces = a.getSuperInterfaceRule();
      for (ASTRuleReference i : interfaces) {
        Optional<MCProdSymbol> ruleSymbol = a.getEnclosingScope().get().resolve(i.getName(),
            MCProdSymbol.KIND);
        if (ruleSymbol.isPresent()) {
          MCProdSymbol r = ruleSymbol.get();
          if (!r.isInterface()) {
            Log.error(String.format(ERROR_CODE + ERROR_MSG_FORMAT, a.getName(), r.getName()),
                a.get_SourcePositionStart());
          }
        }
      }
    }
  }
}