content: package network.aika.fields.defs;
  
  /*
   * 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.
   */
  import network.aika.fields.direction.Direction;
  import network.aika.type.relations.RelationOne;
  import network.aika.type.Obj;
  import network.aika.type.Type;
  
  import java.util.Objects;
  import java.util.stream.Stream;
  
  import static network.aika.fields.defs.FieldLinkDefinition.link;
  
  /**
   *
   * @author Lukas Molzberger
   */
  public abstract class FixedArgumentsFieldDefinition extends FieldDefinition {
  
      private final FieldLinkDefinitionOutputSide[] inputs;
  
      public FixedArgumentsFieldDefinition(Type objectType, String name, int numArgs) {
          super(objectType, name);
  
          inputs = new FieldLinkDefinitionOutputSide[numArgs];
      }
  
      public FixedArgumentsFieldDefinition(Type objectType, String name, int numArgs, double tolerance) {
          super(objectType, name, tolerance);
  
          inputs = new FieldLinkDefinitionOutputSide[numArgs];
      }
  
      @Override
      public Stream<FieldLinkDefinitionOutputSide> getInputs() {
          return Stream.of(inputs)
                  .filter(Objects::nonNull);
      }
  
      @Override
      public void addInput(FieldLinkDefinitionOutputSide fl) {
          inputs[fl.getArgument()] = fl;
      }
  
      public double getInputValueByArg(Obj obj, int arg) {
          var fl = inputs[arg];
          return fl.getInputValue(obj);
      }
  
      public double getUpdatedInputValueByArg(Obj obj, int arg) {
          var fl = inputs[arg];
          return fl.getUpdatedInputValue(obj);
      }
  
      public FixedArgumentsFieldDefinition in(RelationOne relation, FieldDefinition input, int arg) {
          link(input, this, relation.getReverse(), arg);
  
          assert relation != null || objectType.isInstanceOf(input.objectType) || input.objectType.isInstanceOf(objectType);
  
          return this;
      }
  }
  