content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 network.aika.type.relations;
  
  import network.aika.type.Obj;
  
  import java.util.stream.Stream;
  
  /**
   *
   * @author Lukas Molzberger
   */
  public interface Relation {
  
      int getRelationId();
  
      void setReversed(Relation reversed);
  
      Relation getReverse();
  
      Stream<? extends Obj> followMany(Obj fromObj);
  
      boolean testRelation(Obj fromObj, Obj toObj);
  
      String getRelationLabel();
  }
  