binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/query/DefaultQueryResultSpliterator.java

   1 /*
   2  * Copyright (c) 2020 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.dom.adapter.query;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.Map.Entry;
  13 import java.util.Spliterator;
  14 import java.util.function.Consumer;
  15 import org.eclipse.jdt.annotation.NonNullByDefault;
  16 import org.eclipse.jdt.annotation.Nullable;
  17 import org.opendaylight.mdsal.binding.api.query.QueryResult;
  18 import org.opendaylight.mdsal.binding.api.query.QueryResult.Item;
  19 import org.opendaylight.yangtools.yang.binding.DataObject;
  20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  22
  23 @NonNullByDefault
  24 final class DefaultQueryResultSpliterator<T extends DataObject> implements Spliterator<QueryResult.Item<T>> {
  25     private final Spliterator<? extends Entry<YangInstanceIdentifier, NormalizedNode>> domSpliterator;
  26     private final DefaultQueryResult<T> result;
  27
  28     DefaultQueryResultSpliterator(final DefaultQueryResult<T> result,
  29             final Spliterator<? extends Entry<YangInstanceIdentifier, NormalizedNode>> domSpliterator) {
  30         this.result = requireNonNull(result);
  31         this.domSpliterator = requireNonNull(domSpliterator);
  32     }
  33
  34     @Override
  35     public boolean tryAdvance(final @Nullable Consumer<? super Item<T>> action) {
  36         return domSpliterator.tryAdvance(dom -> action.accept(new DefaultQueryResultItem<>(result, dom)));
  37     }
  38
  39     @Override
  40     public @Nullable Spliterator<Item<T>> trySplit() {
  41         final Spliterator<? extends Entry<YangInstanceIdentifier, NormalizedNode>> split = domSpliterator.trySplit();
  42         return split == null ? null : new DefaultQueryResultSpliterator<>(result, split);
  43     }
  44
  45     @Override
  46     public long estimateSize() {
  47         return domSpliterator.estimateSize();
  48     }
  49
  50     @Override
  51     public long getExactSizeIfKnown() {
  52         return domSpliterator.getExactSizeIfKnown();
  53     }
  54
  55     @Override
  56     public int characteristics() {
  57         return domSpliterator.characteristics();
  58     }
  59 }