binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/query/SimpleQueryExecutor.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 com.google.common.base.Preconditions.checkArgument;
  11 import static com.google.common.base.Verify.verifyNotNull;
  12 import static java.util.Objects.requireNonNull;
  13
  14 import com.google.common.annotations.Beta;
  15 import org.eclipse.jdt.annotation.NonNull;
  16 import org.opendaylight.mdsal.binding.api.query.QueryExecutor;
  17 import org.opendaylight.mdsal.binding.api.query.QueryExpression;
  18 import org.opendaylight.mdsal.binding.api.query.QueryResult;
  19 import org.opendaylight.mdsal.binding.dom.codec.api.BindingCodecTree;
  20 import org.opendaylight.mdsal.binding.dom.codec.api.BindingDataObjectCodecTreeNode;
  21 import org.opendaylight.mdsal.dom.spi.query.DOMQueryEvaluator;
  22 import org.opendaylight.yangtools.yang.binding.ChildOf;
  23 import org.opendaylight.yangtools.yang.binding.DataObject;
  24 import org.opendaylight.yangtools.yang.binding.DataRoot;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  27 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  28 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  29 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  30 import org.opendaylight.yangtools.yang.data.api.schema.builder.DataContainerNodeBuilder;
  31 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  32 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  33
  34 @Beta
  35 public final class SimpleQueryExecutor implements QueryExecutor {
  36     private final NormalizedNode root;
  37
  38     public SimpleQueryExecutor(final NormalizedNode root) {
  39         this.root = requireNonNull(root);
  40     }
  41
  42     @Override
  43     public <T extends @NonNull DataObject> QueryResult<T> executeQuery(final QueryExpression<T> query) {
  44         checkArgument(query instanceof DefaultQuery, "Unsupported expression %s", query);
  45         final DefaultQuery<T> defaultQuery = (DefaultQuery<T>) query;
  46         return defaultQuery.toQueryResult(DOMQueryEvaluator.evaluateOnRoot(defaultQuery.asDOMQuery(), root));
  47     }
  48
  49     public static @NonNull Builder builder(final BindingCodecTree codec) {
  50         return new Builder(codec);
  51     }
  52
  53     public static final class Builder {
  54         private final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> rootBuilder = Builders.containerBuilder()
  55             .withNodeIdentifier(new NodeIdentifier(SchemaContext.NAME));
  56         private final BindingCodecTree codec;
  57
  58         Builder(final BindingCodecTree codec) {
  59             this.codec = requireNonNull(codec);
  60         }
  61
  62         public <T extends ChildOf<? extends DataRoot>> @NonNull Builder add(final @NonNull T data) {
  63             @SuppressWarnings({"rawtypes", "unchecked"})
  64             final BindingDataObjectCodecTreeNode<T> dataCodec = (BindingDataObjectCodecTreeNode<T>)
  65                 codec.getSubtreeCodec(InstanceIdentifier.create((Class) data.implementedInterface()));
  66             rootBuilder.withChild((DataContainerChild) verifyNotNull(dataCodec).serialize(data));
  67             return this;
  68         }
  69
  70         /**
  71          * Build an instance of {@link SimpleQueryExecutor}.
  72          *
  73          * @return An {@link SimpleQueryExecutor} instance
  74          */
  75         public @NonNull SimpleQueryExecutor build() {
  76             return new SimpleQueryExecutor(rootBuilder.build());
  77         }
  78     }
  79 }