opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/StructuredDataToJsonProvider.java

   1 package org.opendaylight.controller.sal.rest.impl;
   2
   3 import static org.opendaylight.controller.sal.restconf.impl.MediaTypes.API;
   4
   5 import java.io.IOException;
   6 import java.io.OutputStream;
   7 import java.io.OutputStreamWriter;
   8 import java.lang.annotation.Annotation;
   9 import java.lang.reflect.Type;
  10
  11 import javax.ws.rs.Produces;
  12 import javax.ws.rs.WebApplicationException;
  13 import javax.ws.rs.core.MediaType;
  14 import javax.ws.rs.core.MultivaluedMap;
  15 import javax.ws.rs.ext.MessageBodyWriter;
  16 import javax.ws.rs.ext.Provider;
  17
  18 import org.opendaylight.controller.sal.rest.api.RestconfService;
  19 import org.opendaylight.controller.sal.restconf.impl.StructuredData;
  20 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
  21
  22 import com.google.gson.stream.JsonWriter;
  23
  24 @Provider
  25 @Produces({ API + RestconfService.JSON })
  26 public enum StructuredDataToJsonProvider implements MessageBodyWriter<StructuredData> {
  27     INSTANCE;
  28
  29     @Override
  30     public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
  31         return true;
  32     }
  33
  34     @Override
  35     public long getSize(StructuredData t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
  36         return -1;
  37     }
  38
  39     @Override
  40     public void writeTo(StructuredData t, Class<?> type, Type genericType, Annotation[] annotations,
  41             MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
  42             throws IOException, WebApplicationException {
  43         JsonWriter writer = new JsonWriter(new OutputStreamWriter(entityStream, "UTF-8"));
  44         writer.setIndent("    ");
  45         JsonMapper jsonMapper = new JsonMapper();
  46         jsonMapper.write(writer, t.getData(), (DataNodeContainer) t.getSchema());
  47         writer.flush();
  48     }
  49
  50 }