opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/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.controller.sal.rest.impl;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.gson.stream.JsonReader;
  12 import java.io.IOException;
  13 import java.io.InputStream;
  14 import java.io.InputStreamReader;
  15 import java.lang.annotation.Annotation;
  16 import java.lang.reflect.Type;
  17 import javax.ws.rs.Consumes;
  18 import javax.ws.rs.WebApplicationException;
  19 import javax.ws.rs.core.MediaType;
  20 import javax.ws.rs.core.MultivaluedMap;
  21 import javax.ws.rs.ext.MessageBodyReader;
  22 import javax.ws.rs.ext.Provider;
  23 import org.opendaylight.controller.sal.rest.api.Draft02;
  24 import org.opendaylight.controller.sal.rest.api.RestconfService;
  25 import org.opendaylight.controller.sal.restconf.impl.InstanceIdentifierContext;
  26 import org.opendaylight.controller.sal.restconf.impl.NormalizedNodeContext;
  27 import org.opendaylight.controller.sal.restconf.impl.RestconfDocumentedException;
  28 import org.opendaylight.controller.sal.restconf.impl.RestconfError.ErrorTag;
  29 import org.opendaylight.controller.sal.restconf.impl.RestconfError.ErrorType;
  30 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  31 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
  32 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
  33 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 @Provider
  38 @Consumes({ Draft02.MediaTypes.DATA + RestconfService.JSON, Draft02.MediaTypes.OPERATION + RestconfService.JSON,
  39         MediaType.APPLICATION_JSON })
  40 public class JsonNormalizedNodeBodyReader extends AbstractIdentifierAwareJaxRsProvider implements MessageBodyReader<NormalizedNodeContext> {
  41
  42     private final static Logger LOG = LoggerFactory.getLogger(JsonNormalizedNodeBodyReader.class);
  43
  44     @Override
  45     public boolean isReadable(final Class<?> type, final Type genericType, final Annotation[] annotations,
  46             final MediaType mediaType) {
  47         return true;
  48     }
  49
  50     @Override
  51     public NormalizedNodeContext readFrom(final Class<NormalizedNodeContext> type, final Type genericType,
  52             final Annotation[] annotations, final MediaType mediaType,
  53             final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream) throws IOException,
  54             WebApplicationException {
  55         try {
  56             Optional<InstanceIdentifierContext> path = getIdentifierWithSchema();
  57             NormalizedNodeResult resultHolder = new NormalizedNodeResult();
  58             NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
  59             JsonParserStream jsonParser = JsonParserStream.create(writer, path.get().getSchemaContext());
  60             JsonReader reader = new JsonReader(new InputStreamReader(entityStream));
  61             jsonParser.parse(reader);
  62             return new NormalizedNodeContext(path.get(),resultHolder.getResult());
  63         } catch (Exception e) {
  64             LOG.debug("Error parsing json input", e);
  65
  66             throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
  67                     ErrorTag.MALFORMED_MESSAGE);
  68         }
  69     }
  70 }
  71