odata2-annotation-processor/annotation-processor-core/src/main/java/org/apache/olingo/odata2/annotation/processor/core/ListsProcessor.java [426:458]:
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  public ODataResponse readEntityLink(final GetEntityLinkUriInfo uriInfo, final String contentType)
      throws ODataException {
    final Object data = retrieveData(
        uriInfo.getStartEntitySet(),
        uriInfo.getKeyPredicates(),
        uriInfo.getFunctionImport(),
        mapFunctionParameters(uriInfo.getFunctionImportParameters()),
        uriInfo.getNavigationSegments());

    if (data == null) {
      throw new ODataNotFoundException(ODataNotFoundException.ENTITY);
    }

    final EdmEntitySet entitySet = uriInfo.getTargetEntitySet();

    Map<String, Object> values = new HashMap<String, Object>();
    for (final EdmProperty property : entitySet.getEntityType().getKeyProperties()) {
      values.put(property.getName(), valueAccess.getPropertyValue(data, property));
    }

    ODataContext context = getContext();
    final EntityProviderWriteProperties entryProperties = EntityProviderWriteProperties
        .serviceRoot(context.getPathInfo().getServiceRoot())
        .build();

    final int timingHandle = context.startRuntimeMeasurement("EntityProvider", "writeLink");

    final ODataResponse response = EntityProvider.writeLink(contentType, entitySet, values, entryProperties);

    context.stopRuntimeMeasurement(timingHandle);

    return ODataResponse.fromResponse(response).build();
  }
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odata2-lib/odata-ref/src/main/java/org/apache/olingo/odata2/ref/processor/ListsProcessor.java [432:465]:
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  public ODataResponse readEntityLink(final GetEntityLinkUriInfo uriInfo, final String contentType)
      throws ODataException {
    final Object data = retrieveData(
        uriInfo.getStartEntitySet(),
        uriInfo.getKeyPredicates(),
        uriInfo.getFunctionImport(),
        mapFunctionParameters(uriInfo.getFunctionImportParameters()),
        uriInfo.getNavigationSegments());

    // if (!appliesFilter(data, uriInfo.getFilter()))
    if (data == null) {
      throw new ODataNotFoundException(ODataNotFoundException.ENTITY);
    }

    final EdmEntitySet entitySet = uriInfo.getTargetEntitySet();

    Map<String, Object> values = new HashMap<String, Object>();
    for (final EdmProperty property : entitySet.getEntityType().getKeyProperties()) {
      values.put(property.getName(), valueAccess.getPropertyValue(data, property));
    }

    ODataContext context = getContext();
    final EntityProviderWriteProperties entryProperties = EntityProviderWriteProperties
        .serviceRoot(context.getPathInfo().getServiceRoot())
        .build();

    final int timingHandle = context.startRuntimeMeasurement("EntityProvider", "writeLink");

    final ODataResponse response = EntityProvider.writeLink(contentType, entitySet, values, entryProperties);

    context.stopRuntimeMeasurement(timingHandle);

    return ODataResponse.fromResponse(response).build();
  }
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