MacroHelper.java

/*
 * Copyright 2003-2012 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jetbrains.mps.util;

import org.jetbrains.annotations.Nullable;

public interface MacroHelper {
  String expandPath(@Nullable String path);
  String shrinkPath(@Nullable String absolutePath);

  /**
   * leaves the path unchanged
   */
  final class MacroNoHelper implements MacroHelper {
    @Override
    public String expandPath(@Nullable String path) {
      return path;
    }

    @Override
    public String shrinkPath(@Nullable String absolutePath) {
      return absolutePath;
    }
  }
}