SNodePresentationComparator.java

/*
 * Copyright 2003-2016 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.mps.openapi.model.SNode;

import java.util.Comparator;

/**
 * Compare nodes using their {@link SNode#getPresentation() presentation}
 */
public class SNodePresentationComparator implements Comparator<SNode> {
  @Override
  public int compare(SNode o1, SNode o2) {
    if (o1 == null || o2 == null) {
      return 0;
    }
    return o1.getPresentation().compareTo(o2.getPresentation());
  }
}