restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/databind/JsonResourceBody.java

   1 /*
   2  * Copyright (c) 2023 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.restconf.nb.rfc8040.databind;
   9
  10 import com.google.gson.stream.JsonReader;
  11 import java.io.IOException;
  12 import java.io.InputStream;
  13 import java.io.InputStreamReader;
  14 import java.nio.charset.StandardCharsets;
  15 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  16 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  17 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
  18 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
  19 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
  20
  21 /**
  22  * A JSON-encoded {@link ResourceBody}.
  23  */
  24 public final class JsonResourceBody extends ResourceBody {
  25     public JsonResourceBody(final InputStream inputStream) {
  26         super(inputStream);
  27     }
  28
  29     @Override
  30     void streamTo(final InputStream inputStream, final Inference inference, final PathArgument name,
  31             final NormalizedNodeStreamWriter writer) throws IOException {
  32         try (var jsonParser = newParser(inference, writer)) {
  33             try (var reader = new JsonReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {
  34                 jsonParser.parse(reader);
  35             }
  36         }
  37     }
  38
  39     private static JsonParserStream newParser(final Inference inference, final NormalizedNodeStreamWriter writer) {
  40         final var codecs = JSONCodecFactorySupplier.RFC7951.getShared(inference.getEffectiveModelContext());
  41         final var stack = inference.toSchemaInferenceStack();
  42         if (stack.isEmpty()) {
  43             return JsonParserStream.create(writer, codecs);
  44         }
  45
  46         stack.exit();
  47         return JsonParserStream.create(writer, codecs, stack.toInference());
  48     }
  49 }