Package org.apache.olingo.odata2.core.ep.util

Examples of org.apache.olingo.odata2.core.ep.util.CircleStreamBuffer

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    return parts;
  }

  private InputStream wrapInJson(final List<DebugInfo> parts) throws IOException {
    CircleStreamBuffer csb = new CircleStreamBuffer();
    BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(csb.getOutputStream(), "UTF-8"));
    JsonStreamWriter jsonStreamWriter = new JsonStreamWriter(writer);
    jsonStreamWriter.beginObject()
        .name(parts.get(0).getName().toLowerCase(Locale.ROOT));
    parts.get(0).appendJson(jsonStreamWriter);
    jsonStreamWriter.separator()
        .name(parts.get(1).getName().toLowerCase(Locale.ROOT));
    parts.get(1).appendJson(jsonStreamWriter);
    jsonStreamWriter.separator()
        .name("server")
        .beginObject()
        .namedStringValueRaw("version", ODataDebugResponseWrapper.class.getPackage().getImplementationVersion());
    for (final DebugInfo part : parts.subList(2, parts.size())) {
      jsonStreamWriter.separator()
          .name(part.getName().toLowerCase(Locale.ROOT));
      part.appendJson(jsonStreamWriter);
    }
    jsonStreamWriter.endObject()
        .endObject();
    writer.flush();
    csb.closeWrite();
    return csb.getInputStream();
  }
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  }

  @Override
  public ODataResponse writeFeed(final EdmEntitySet entitySet, final List<Map<String, Object>> data,
      final EntityProviderWriteProperties properties) throws EntityProviderException {
    CircleStreamBuffer csb = new CircleStreamBuffer();

    try {
      OutputStream outStream = csb.getOutputStream();
      XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter(outStream, DEFAULT_CHARSET);
      writer.writeStartDocument(DEFAULT_CHARSET, XML_VERSION);

      AtomFeedProducer atomFeedProvider = new AtomFeedProducer(properties);
      EntityInfoAggregator eia = EntityInfoAggregator.create(entitySet, properties.getExpandSelectTree());
      atomFeedProvider.append(writer, eia, data, false);

      writer.flush();
      csb.closeWrite();

      ODataResponse response = ODataResponse.entity(csb.getInputStream()).build();
      return response;
    } catch (EntityProviderException e) {
      csb.close();
      throw e;
    } catch (XMLStreamException e) {
      csb.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
  }
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  }

  @Override
  public ODataResponse writeLink(final EdmEntitySet entitySet, final Map<String, Object> data,
      final EntityProviderWriteProperties properties) throws EntityProviderException {
    CircleStreamBuffer csb = new CircleStreamBuffer();

    try {
      OutputStream outStream = csb.getOutputStream();
      XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter(outStream, DEFAULT_CHARSET);
      writer.writeStartDocument(DEFAULT_CHARSET, XML_VERSION);

      XmlLinkEntityProducer entity = new XmlLinkEntityProducer(properties);
      final EntityInfoAggregator entityInfo = EntityInfoAggregator.create(entitySet, properties.getExpandSelectTree());
      entity.append(writer, entityInfo, data, true);

      writer.flush();
      csb.closeWrite();

      return ODataResponse.entity(csb.getInputStream()).build();
    } catch (EntityProviderException e) {
      csb.close();
      throw e;
    } catch (Exception e) {
      csb.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }

  }
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  }

  @Override
  public ODataResponse writeLinks(final EdmEntitySet entitySet, final List<Map<String, Object>> data,
      final EntityProviderWriteProperties properties) throws EntityProviderException {
    CircleStreamBuffer csb = new CircleStreamBuffer();

    try {
      OutputStream outStream = csb.getOutputStream();
      XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter(outStream, DEFAULT_CHARSET);
      writer.writeStartDocument(DEFAULT_CHARSET, XML_VERSION);

      XmlLinksEntityProducer entity = new XmlLinksEntityProducer(properties);
      final EntityInfoAggregator entityInfo = EntityInfoAggregator.create(entitySet, properties.getExpandSelectTree());
      entity.append(writer, entityInfo, data);

      writer.flush();
      csb.closeWrite();

      return ODataResponse.entity(csb.getInputStream()).build();
    } catch (EntityProviderException e) {
      csb.close();
      throw e;
    } catch (Exception e) {
      csb.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
  }
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    }
  }

  private ODataResponse writeCollection(final EntityPropertyInfo propertyInfo, final List<?> data)
      throws EntityProviderException {
    CircleStreamBuffer csb = new CircleStreamBuffer();

    try {
      OutputStream outStream = csb.getOutputStream();
      XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter(outStream, DEFAULT_CHARSET);
      writer.writeStartDocument(DEFAULT_CHARSET, XML_VERSION);

      XmlCollectionEntityProducer.append(writer, propertyInfo, data);

      writer.flush();
      csb.closeWrite();

      return ODataResponse.entity(csb.getInputStream()).build();
    } catch (EntityProviderException e) {
      csb.close();
      throw e;
    } catch (Exception e) {
      csb.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
  }
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    if (schemas != null) {
      dataServiceVersion = calculateDataServiceVersion(schemas);
    }
    DataServices metadata = new DataServices().setSchemas(schemas).setDataServiceVersion(dataServiceVersion);
    OutputStreamWriter writer = null;
    CircleStreamBuffer csb = new CircleStreamBuffer();
    try {
      writer = new OutputStreamWriter(csb.getOutputStream(), DEFAULT_CHARSET);
      XMLStreamWriter xmlStreamWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(writer);
      XmlMetadataProducer.writeMetadata(metadata, xmlStreamWriter, predefinedNamespaces);
    } catch (UnsupportedEncodingException e) {
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    } catch (XMLStreamException e) {
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    } catch (FactoryConfigurationError e) {
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
    builder.entity(csb.getInputStream());
    builder.header(ODataHttpHeaders.DATASERVICEVERSION, dataServiceVersion);
    return builder.build();
  }
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   * @return an {@link ODataResponse} containing the serialized error message
   */
  @Override
  public ODataResponse writeErrorDocument(final HttpStatusCodes status, final String errorCode, final String message,
      final Locale locale, final String innerError) {
    CircleStreamBuffer buffer = new CircleStreamBuffer();

    try {
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(buffer.getOutputStream(), DEFAULT_CHARSET));
      new JsonErrorDocumentProducer().writeErrorDocument(writer, errorCode, message, locale, innerError);
      writer.flush();
      buffer.closeWrite();

      return ODataResponse.status(status)
          .entity(buffer.getInputStream())
          .header(ODataHttpHeaders.DATASERVICEVERSION, ODataServiceVersion.V10)
          .build();
    } catch (Exception e) {
      buffer.close();
      throw new ODataRuntimeException(e);
    }
  }
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   * @return resulting {@link ODataResponse} with written service document
   * @throws EntityProviderException
   */
  @Override
  public ODataResponse writeServiceDocument(final Edm edm, final String serviceRoot) throws EntityProviderException {
    CircleStreamBuffer buffer = new CircleStreamBuffer();

    try {
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(buffer.getOutputStream(), DEFAULT_CHARSET));
      JsonServiceDocumentProducer.writeServiceDocument(writer, edm);
      writer.flush();
      buffer.closeWrite();

      return ODataResponse.entity(buffer.getInputStream())
          .header(ODataHttpHeaders.DATASERVICEVERSION, ODataServiceVersion.V10)
          .build();
    } catch (Exception e) {
      buffer.close();
      throw new ODataRuntimeException(e);
    }
  }
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  @Override
  public ODataResponse writeEntry(final EdmEntitySet entitySet, final Map<String, Object> data,
      final EntityProviderWriteProperties properties) throws EntityProviderException {
    final EntityInfoAggregator entityInfo = EntityInfoAggregator.create(entitySet, properties.getExpandSelectTree());
    CircleStreamBuffer buffer = new CircleStreamBuffer();

    try {
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(buffer.getOutputStream(), DEFAULT_CHARSET));
      JsonEntryEntityProducer producer = new JsonEntryEntityProducer(properties);
      producer.append(writer, entityInfo, data, true);
      writer.flush();
      buffer.closeWrite();

      return ODataResponse.entity(buffer.getInputStream())
          .eTag(producer.getETag())
          .idLiteral(producer.getLocation())
          .build();
    } catch (EntityProviderException e) {
      buffer.close();
      throw e;
    } catch (Exception e) {
      buffer.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
  }
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    return writeSingleTypedElement(EntityInfoAggregator.create(edmProperty), value);
  }

  private ODataResponse writeSingleTypedElement(final EntityPropertyInfo propertyInfo, final Object value)
      throws EntityProviderException {
    CircleStreamBuffer buffer = new CircleStreamBuffer();

    try {
      OutputStream outStream = buffer.getOutputStream();
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outStream, DEFAULT_CHARSET));
      new JsonPropertyEntityProducer().append(writer, propertyInfo, value);
      writer.flush();
      buffer.closeWrite();

      return ODataResponse.entity(buffer.getInputStream())
          .header(ODataHttpHeaders.DATASERVICEVERSION, ODataServiceVersion.V10)
          .build();
    } catch (EntityProviderException e) {
      buffer.close();
      throw e;
    } catch (Exception e) {
      buffer.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
  }
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