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

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

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

org.apache.olingo.odata2.core.ep.util.CircleStreamBuffer
Circular stream buffer to write/read into/from one single buffer. With support of {@link InputStream} and {@link OutputStream} access to buffered data.


  @Override
  public ODataResponse writeLink(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));
      new JsonLinkEntityProducer(properties).append(writer, entityInfo, data);
      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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  @Override
  public ODataResponse writeLinks(final EdmEntitySet entitySet, final List<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));
      new JsonLinksEntityProducer(properties).append(writer, entityInfo, data);
      writer.flush();
      buffer.closeWrite();


      ODataResponseBuilder response = ODataResponse.entity(buffer.getInputStream());
      if (properties.getInlineCountType() != InlineCount.ALLPAGES) {
        response = response.header(ODataHttpHeaders.DATASERVICEVERSION, ODataServiceVersion.V10);
      }
      return response.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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    }
  }


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


    try {
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(buffer.getOutputStream(), DEFAULT_CHARSET));
      new JsonCollectionEntityProducer().append(writer, propertyInfo, data);
      writer.flush();
      buffer.closeWrite();


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

View Full Code Here


    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();
    jsonStreamWriter.name(parts.get(0).getName().toLowerCase(Locale.ROOT));
    parts.get(0).appendJson(jsonStreamWriter);
    jsonStreamWriter.separator();
    jsonStreamWriter.name(parts.get(1).getName().toLowerCase(Locale.ROOT));
    parts.get(1).appendJson(jsonStreamWriter);
    if (parts.size() > 2) {
      jsonStreamWriter.separator();
      jsonStreamWriter.name("server")
          .beginObject();
    }
    boolean first = true;
    for (final DebugInfo part : parts.subList(2, parts.size())) {
      if (!first) {
        jsonStreamWriter.separator();
      }
      first = false;
      jsonStreamWriter.name(part.getName().toLowerCase(Locale.ROOT));
      part.appendJson(jsonStreamWriter);
    }
    if (parts.size() > 2) {
      jsonStreamWriter.endObject();
    }
    jsonStreamWriter.endObject();
    writer.flush();
    csb.closeWrite();
    return csb.getInputStream();
  }

View Full Code Here


  @Override
  public ODataResponse writeFeed(final EdmEntitySet entitySet, final List<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));
      new JsonFeedEntityProducer(properties).append(writer, entityInfo, data, true);
      writer.flush();
      buffer.closeWrite();


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

View Full Code Here


  @Override
  public ODataResponse writeLink(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));
      new JsonLinkEntityProducer(properties).append(writer, entityInfo, data);
      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);
    }
  }

View Full Code Here


  @Override
  public ODataResponse writeLinks(final EdmEntitySet entitySet, final List<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));
      new JsonLinksEntityProducer(properties).append(writer, entityInfo, data);
      writer.flush();
      buffer.closeWrite();


      ODataResponseBuilder response = ODataResponse.entity(buffer.getInputStream());
      if (properties.getInlineCountType() != InlineCount.ALLPAGES) {
        response = response.header(ODataHttpHeaders.DATASERVICEVERSION, ODataServiceVersion.V10);
      }
      return response.build();
    } catch (EntityProviderException e) {
      buffer.close();
      throw e;
    } catch (Exception e) {
      buffer.close();
      throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
          .getSimpleName()), e);
    }
  }

View Full Code Here

    }
  }


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


    try {
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(buffer.getOutputStream(), DEFAULT_CHARSET));
      new JsonCollectionEntityProducer().append(writer, propertyInfo, data);
      writer.flush();
      buffer.closeWrite();


      return ODataResponse.entity(buffer.getInputStream()).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 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 csb = new CircleStreamBuffer();


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


      XmlErrorDocumentProducer producer = new XmlErrorDocumentProducer();
      producer.writeErrorDocument(writer, errorCode, message, locale, innerError);


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


      ODataResponseBuilder response = ODataResponse.entity(csb.getInputStream())
          .header(ODataHttpHeaders.DATASERVICEVERSION, ODataServiceVersion.V10)
          .status(status);
      return response.build();
    } catch (Exception e) {
      csb.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 csb = new CircleStreamBuffer();


    try {
      OutputStreamWriter writer = new OutputStreamWriter(csb.getOutputStream(), DEFAULT_CHARSET);
      AtomServiceDocumentProducer as = new AtomServiceDocumentProducer(edm, serviceRoot);
      as.writeServiceDocument(writer);
      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);
    }
  }

View Full Code Here

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