binding/mdsal-binding-generator/src/main/java/org/opendaylight/mdsal/binding/generator/impl/rt/DefaultGroupingRuntimeType.java

   1 /*
   2  * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.generator.impl.rt;
   9
  10 import java.util.Arrays;
  11 import java.util.Collections;
  12 import java.util.List;
  13 import java.util.Objects;
  14 import org.eclipse.jdt.annotation.Nullable;
  15 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
  16 import org.opendaylight.mdsal.binding.runtime.api.CompositeRuntimeType;
  17 import org.opendaylight.mdsal.binding.runtime.api.GroupingRuntimeType;
  18 import org.opendaylight.mdsal.binding.runtime.api.RuntimeType;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.GroupingEffectiveStatement;
  20
  21 public final class DefaultGroupingRuntimeType extends AbstractCompositeRuntimeType<GroupingEffectiveStatement>
  22         implements GroupingRuntimeType {
  23     /**
  24      * These are vectors towards concrete instantiations of this type -- i.e. the manifestation in the effective data
  25      * tree. Each item in this list represents either:
  26      * <ul>
  27      *   <li>a concrete instantiation, or<li>
  28      *   <li>another {@link GroupingRuntimeType}</li>
  29      * </ul>
  30      * We use these vectors to create {@link #instantiations()}.
  31      */
  32     private final @Nullable Object instantiationVectors;
  33
  34     public DefaultGroupingRuntimeType(final GeneratedType bindingType, final GroupingEffectiveStatement statement,
  35             final List<RuntimeType> children, final List<? extends CompositeRuntimeType> instantiationVectors) {
  36         super(bindingType, statement, children);
  37         this.instantiationVectors = switch (instantiationVectors.size()) {
  38             case 0 -> null;
  39             case 1 -> Objects.requireNonNull(instantiationVectors.get(0));
  40             default -> instantiationVectors.stream().map(Objects::requireNonNull).toArray(CompositeRuntimeType[]::new);
  41         };
  42     }
  43
  44     @Override
  45     public List<CompositeRuntimeType> directUsers() {
  46         final var local = instantiationVectors;
  47         if (local == null) {
  48             return List.of();
  49         } else if (local instanceof CompositeRuntimeType[] array) {
  50             return Collections.unmodifiableList(Arrays.asList(array));
  51         } else {
  52             return List.of((CompositeRuntimeType) local);
  53         }
  54     }
  55 }