/* * Copyright 2003-2011 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.plugins.relations; import java.util.Comparator; import java.util.List; public class BaseOrder implements Comparator<RelationDescriptor> { private List<String> myOrderedIds; public BaseOrder(List<String> orderedIds) { myOrderedIds = orderedIds; } @Override public int compare(RelationDescriptor d1, RelationDescriptor d2) { String id1 = d1.getTitle(); String id2 = d2.getTitle(); int i1 = myOrderedIds.indexOf(id1); int i2 = myOrderedIds.indexOf(id2); if (i1 == -1 || i2 == -1) return 0; return i1 - i2; } }