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

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

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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);
    }
  }
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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);
    }
  }
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  }

  @Override
  public ODataResponse writeEntry(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);

      AtomEntryEntityProducer as = new AtomEntryEntityProducer(properties);
      EntityInfoAggregator eia = EntityInfoAggregator.create(entitySet, properties.getExpandSelectTree());
      as.append(writer, eia, data, true, false);

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

      ODataResponseBuilder response = ODataResponse.entity(csb.getInputStream())
          .eTag(as.getETag())
          .idLiteral(as.getLocation());
      return response.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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    return writeSingleTypedElement(propertyInfo, value);
  }

  private ODataResponse writeSingleTypedElement(final EntityPropertyInfo propertyInfo, final Object value)
      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);

      XmlPropertyEntityProducer ps = new XmlPropertyEntityProducer(false);
      ps.append(writer, propertyInfo, value);

      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 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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