restconf/restconf-nb-bierman02/src/main/java/org/opendaylight/netconf/sal/rest/impl/JsonNormalizedNodeBodyReader.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. 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.netconf.sal.rest.impl;
   9
  10 import com.google.common.base.Throwables;
  11 import com.google.common.collect.Iterables;
  12 import com.google.gson.stream.JsonReader;
  13 import java.io.IOException;
  14 import java.io.InputStream;
  15 import java.io.InputStreamReader;
  16 import java.lang.annotation.Annotation;
  17 import java.lang.reflect.Type;
  18 import java.nio.charset.StandardCharsets;
  19 import java.util.ArrayList;
  20 import java.util.List;
  21 import java.util.Optional;
  22 import javax.ws.rs.Consumes;
  23 import javax.ws.rs.WebApplicationException;
  24 import javax.ws.rs.core.MediaType;
  25 import javax.ws.rs.core.MultivaluedMap;
  26 import javax.ws.rs.ext.MessageBodyReader;
  27 import javax.ws.rs.ext.Provider;
  28 import org.opendaylight.netconf.sal.rest.api.Draft02;
  29 import org.opendaylight.netconf.sal.rest.api.RestconfService;
  30 import org.opendaylight.netconf.sal.restconf.impl.ControllerContext;
  31 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  32 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
  33 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  34 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
  35 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
  36 import org.opendaylight.restconf.common.util.RestUtil;
  37 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  38 import org.opendaylight.yangtools.yang.data.api.schema.AugmentationNode;
  39 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
  40 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
  41 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  42 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  43 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  44 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  45 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
  46 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
  47 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
  48 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
  49 import org.opendaylight.yangtools.yang.data.impl.schema.ResultAlreadySetException;
  50 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  51 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  52 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  53 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
  54 import org.slf4j.Logger;
  55 import org.slf4j.LoggerFactory;
  56
  57 @Provider
  58 @Consumes({
  59     Draft02.MediaTypes.DATA + RestconfService.JSON,
  60     Draft02.MediaTypes.OPERATION + RestconfService.JSON,
  61     MediaType.APPLICATION_JSON
  62 })
  63 public class JsonNormalizedNodeBodyReader
  64         extends AbstractIdentifierAwareJaxRsProvider implements MessageBodyReader<NormalizedNodeContext> {
  65
  66     private static final Logger LOG = LoggerFactory.getLogger(JsonNormalizedNodeBodyReader.class);
  67
  68     public JsonNormalizedNodeBodyReader(final ControllerContext controllerContext) {
  69         super(controllerContext);
  70     }
  71
  72     @Override
  73     public boolean isReadable(final Class<?> type, final Type genericType, final Annotation[] annotations,
  74             final MediaType mediaType) {
  75         return true;
  76     }
  77
  78     @SuppressWarnings("checkstyle:IllegalCatch")
  79     @Override
  80     public NormalizedNodeContext readFrom(final Class<NormalizedNodeContext> type, final Type genericType,
  81             final Annotation[] annotations, final MediaType mediaType,
  82             final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream) throws
  83         WebApplicationException {
  84         try {
  85             return readFrom(getInstanceIdentifierContext(), entityStream, isPost());
  86         } catch (final Exception e) {
  87             propagateExceptionAs(e);
  88             return null; // no-op
  89         }
  90     }
  91
  92     @SuppressWarnings("checkstyle:IllegalCatch")
  93     public static NormalizedNodeContext readFrom(final String uriPath, final InputStream entityStream,
  94             final boolean isPost, final ControllerContext controllerContext) throws RestconfDocumentedException {
  95
  96         try {
  97             return readFrom(controllerContext.toInstanceIdentifier(uriPath), entityStream, isPost);
  98         } catch (final Exception e) {
  99             propagateExceptionAs(e);
 100             return null; // no-op
 101         }
 102     }
 103
 104     private static NormalizedNodeContext readFrom(final InstanceIdentifierContext<?> path,
 105                                                   final InputStream entityStream, final boolean isPost)
 106             throws IOException {
 107         final Optional<InputStream> nonEmptyInputStreamOptional = RestUtil.isInputStreamEmpty(entityStream);
 108         if (nonEmptyInputStreamOptional.isEmpty()) {
 109             return new NormalizedNodeContext(path, null);
 110         }
 111         final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
 112         final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
 113
 114         final SchemaInferenceStack parentSchema;
 115         if (isPost) {
 116             // FIXME: We need dispatch for RPC.
 117             parentSchema = SchemaInferenceStack.ofSchemaPath(path.getSchemaContext(), path.getSchemaNode().getPath());
 118         } else if (path.getSchemaNode() instanceof SchemaContext
 119                 || SchemaPath.ROOT.equals(path.getSchemaNode().getPath().getParent())) {
 120             parentSchema = SchemaInferenceStack.of(path.getSchemaContext());
 121         } else {
 122             parentSchema = SchemaInferenceStack.ofSchemaPath(path.getSchemaContext(),
 123                 path.getSchemaNode().getPath().getParent());
 124         }
 125
 126         final JsonParserStream jsonParser = JsonParserStream.create(writer,
 127             JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.getShared(path.getSchemaContext()),
 128             parentSchema.toInference());
 129         final JsonReader reader = new JsonReader(new InputStreamReader(nonEmptyInputStreamOptional.get(),
 130                 StandardCharsets.UTF_8));
 131         jsonParser.parse(reader);
 132
 133         NormalizedNode result = resultHolder.getResult();
 134         final List<YangInstanceIdentifier.PathArgument> iiToDataList = new ArrayList<>();
 135         InstanceIdentifierContext<? extends SchemaNode> newIIContext;
 136
 137         while (result instanceof AugmentationNode || result instanceof ChoiceNode) {
 138             final Object childNode = ((DataContainerNode) result).body().iterator().next();
 139             if (isPost) {
 140                 iiToDataList.add(result.getIdentifier());
 141             }
 142             result = (NormalizedNode) childNode;
 143         }
 144
 145         if (isPost) {
 146             if (result instanceof MapEntryNode) {
 147                 iiToDataList.add(new YangInstanceIdentifier.NodeIdentifier(result.getIdentifier().getNodeType()));
 148                 iiToDataList.add(result.getIdentifier());
 149             } else {
 150                 iiToDataList.add(result.getIdentifier());
 151             }
 152         } else {
 153             if (result instanceof MapNode) {
 154                 result = Iterables.getOnlyElement(((MapNode) result).body());
 155             }
 156         }
 157
 158         final YangInstanceIdentifier fullIIToData = YangInstanceIdentifier.create(Iterables.concat(
 159                 path.getInstanceIdentifier().getPathArguments(), iiToDataList));
 160
 161         newIIContext = new InstanceIdentifierContext<>(fullIIToData, path.getSchemaNode(), path.getMountPoint(),
 162                 path.getSchemaContext());
 163
 164         return new NormalizedNodeContext(newIIContext, result);
 165     }
 166
 167     private static void propagateExceptionAs(final Exception exception) throws RestconfDocumentedException {
 168         Throwables.throwIfInstanceOf(exception, RestconfDocumentedException.class);
 169         LOG.debug("Error parsing json input", exception);
 170
 171         if (exception instanceof ResultAlreadySetException) {
 172             throw new RestconfDocumentedException("Error parsing json input: Failed to create new parse result data. "
 173                     + "Are you creating multiple resources/subresources in POST request?", exception);
 174         }
 175
 176         RestconfDocumentedException.throwIfYangError(exception);
 177         throw new RestconfDocumentedException("Error parsing input: " + exception.getMessage(), ErrorType.PROTOCOL,
 178                 ErrorTag.MALFORMED_MESSAGE, exception);
 179     }
 180 }
 181