opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/NormalizedNodeJsonBodyWriter.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.Charsets;
  11 import java.io.IOException;
  12 import java.io.OutputStream;
  13 import java.io.OutputStreamWriter;
  14 import java.lang.annotation.Annotation;
  15 import java.lang.reflect.Type;
  16 import javax.ws.rs.Produces;
  17 import javax.ws.rs.WebApplicationException;
  18 import javax.ws.rs.core.MediaType;
  19 import javax.ws.rs.core.MultivaluedMap;
  20 import javax.ws.rs.core.Response;
  21 import javax.ws.rs.ext.MessageBodyWriter;
  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.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  29 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  30 import org.opendaylight.yangtools.yang.data.codec.gson.JSONNormalizedNodeStreamWriter;
  31
  32 @Provider
  33 @Produces({ Draft02.MediaTypes.API + RestconfService.JSON, Draft02.MediaTypes.DATA + RestconfService.JSON,
  34     Draft02.MediaTypes.OPERATION + RestconfService.JSON, MediaType.APPLICATION_JSON })
  35 public class NormalizedNodeJsonBodyWriter implements MessageBodyWriter<NormalizedNodeContext> {
  36
  37     @Override
  38     public boolean isWriteable(final Class<?> type, final Type genericType, final Annotation[] annotations, final MediaType mediaType) {
  39         return type.equals(NormalizedNodeContext.class);
  40     }
  41
  42     @Override
  43     public long getSize(final NormalizedNodeContext t, final Class<?> type, final Type genericType, final Annotation[] annotations, final MediaType mediaType) {
  44         return -1;
  45     }
  46
  47     @Override
  48     public void writeTo(final NormalizedNodeContext t, final Class<?> type, final Type genericType, final Annotation[] annotations,
  49             final MediaType mediaType, final MultivaluedMap<String, Object> httpHeaders, final OutputStream entityStream)
  50                     throws IOException, WebApplicationException {
  51         if (t.getData() == null) {
  52             throw new RestconfDocumentedException(Response.Status.NOT_FOUND);
  53         }
  54
  55         InstanceIdentifierContext pathContext = t.getInstanceIdentifierContext();
  56         OutputStreamWriter ouWriter = new OutputStreamWriter(entityStream, Charsets.UTF_8);
  57         NormalizedNodeStreamWriter jsonWriter = JSONNormalizedNodeStreamWriter.create(pathContext.getSchemaContext(),ouWriter);
  58         NormalizedNodeWriter nnWriter = NormalizedNodeWriter.forStreamWriter(jsonWriter);
  59
  60         nnWriter.write(t.getData());
  61         nnWriter.flush();
  62     }
  63 }