@Override
public void readEntity(
final ODataRequest request,
ODataResponse response,
final UriInfo uriInfo,
final ContentType requestedContentType)
throws ODataApplicationException, SerializerException {
// First we have to figure out which entity set the requested entity is in
final EdmEntitySet edmEntitySet = getEdmEntitySet(uriInfo.asUriInfoResource());
// Next we fetch the requested entity from the database
Entity entity;
try {
entity = readEntityInternal(uriInfo.asUriInfoResource(), edmEntitySet);
} catch (DataProviderException e) {
throw new ODataApplicationException(e.getMessage(), 500, Locale.ENGLISH);
}
if (entity == null) {
// If no entity was found for the given key we throw an exception.
throw new ODataApplicationException(
"No entity found for this key", HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
} else {
// If an entity was found we proceed by serializing it and sending it to the client.
ODataSerializer serializer = odata.createSerializer(requestedContentType);
final ExpandOption expand = uriInfo.getExpandOption();
final SelectOption select = uriInfo.getSelectOption();
InputStream serializedContent =
serializer
.entity(
edm,
edmEntitySet.getEntityType(),
entity,
EntitySerializerOptions.with()
.contextURL(
isODataMetadataNone(requestedContentType)
? null
: getContextUrl(edmEntitySet, true, expand, select, null))
.expand(expand)
.select(select)
.build())
.getContent();
response.setContent(serializedContent);
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
response.setHeader(HttpHeader.CONTENT_TYPE, requestedContentType.toContentTypeString());
}
}
@Override
public void readPrimitiveValue(
ODataRequest request, ODataResponse response, UriInfo uriInfo, ContentType format)
throws ODataApplicationException, SerializerException {
// First we have to figure out which entity set the requested entity is in
final EdmEntitySet edmEntitySet = getEdmEntitySet(uriInfo.asUriInfoResource());
// Next we fetch the requested entity from the database
final Entity entity;
try {
entity = readEntityInternal(uriInfo.asUriInfoResource(), edmEntitySet);
} catch (DataProviderException e) {
throw new ODataApplicationException(e.getMessage(), 500, Locale.ENGLISH);
}
if (entity == null) {
// If no entity was found for the given key we throw an exception.
throw new ODataApplicationException(
"No entity found for this key", HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
} else {
// Next we get the property value from the entity and pass the value to serialization
UriResourceProperty uriProperty =
(UriResourceProperty)
uriInfo.getUriResourceParts().get(uriInfo.getUriResourceParts().size() - 1);
EdmProperty edmProperty = uriProperty.getProperty();
Property property = entity.getProperty(edmProperty.getName());
if (property == null) {
throw new ODataApplicationException(
"No property found", HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
} else {
if (property.getValue() == null) {
response.setStatusCode(HttpStatusCode.NO_CONTENT.getStatusCode());
} else {
String value = String.valueOf(property.getValue());
ByteArrayInputStream serializerContent =
new ByteArrayInputStream(value.getBytes(Charset.forName("UTF-8")));
response.setContent(serializerContent);
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
response.setHeader(HttpHeader.CONTENT_TYPE, ContentType.TEXT_PLAIN.toContentTypeString());
}
}
}
}
@Override
public void readEntityCollection(
final ODataRequest request,
ODataResponse response,
final UriInfo uriInfo,
final ContentType requestedContentType)
throws ODataApplicationException, SerializerException {
// First we have to figure out which entity set to use
final EdmEntitySet edmEntitySet = getEdmEntitySet(uriInfo.asUriInfoResource());
// Second we fetch the data for this specific entity set from the mock database and transform it
// into an EntitySet
// object which is understood by our serialization
EntityCollection entitySet = dataProvider.readAll(edmEntitySet);
// Next we create a serializer based on the requested format. This could also be a custom format
// but we do not
// support them in this example
ODataSerializer serializer = odata.createSerializer(requestedContentType);
// Now the content is serialized using the serializer.
final ExpandOption expand = uriInfo.getExpandOption();
final SelectOption select = uriInfo.getSelectOption();
InputStream serializedContent =
serializer
.entityCollection(
edm,
edmEntitySet.getEntityType(),
entitySet,
EntityCollectionSerializerOptions.with()
.contextURL(
isODataMetadataNone(requestedContentType)
? null
: getContextUrl(edmEntitySet, false, expand, select, null))
.count(uriInfo.getCountOption())
.expand(expand)
.select(select)
.build())
.getContent();
// Finally we set the response data, headers and status code
response.setContent(serializedContent);
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
response.setHeader(HttpHeader.CONTENT_TYPE, requestedContentType.toContentTypeString());
}
private void readProperty(
ODataResponse response, UriInfo uriInfo, ContentType contentType, boolean complex)
throws ODataApplicationException, SerializerException {
// To read a property we have to first get the entity out of the entity set
final EdmEntitySet edmEntitySet = getEdmEntitySet(uriInfo.asUriInfoResource());
Entity entity;
try {
entity = readEntityInternal(uriInfo.asUriInfoResource(), edmEntitySet);
} catch (DataProviderException e) {
throw new ODataApplicationException(
e.getMessage(), HttpStatusCode.INTERNAL_SERVER_ERROR.getStatusCode(), Locale.ENGLISH);
}
if (entity == null) {
// If no entity was found for the given key we throw an exception.
throw new ODataApplicationException(
"No entity found for this key", HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
} else {
// Next we get the property value from the entity and pass the value to serialization
UriResourceProperty uriProperty =
(UriResourceProperty)
uriInfo.getUriResourceParts().get(uriInfo.getUriResourceParts().size() - 1);
EdmProperty edmProperty = uriProperty.getProperty();
Property property = entity.getProperty(edmProperty.getName());
if (property == null) {
throw new ODataApplicationException(
"No property found", HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
} else {
if (property.getValue() == null) {
response.setStatusCode(HttpStatusCode.NO_CONTENT.getStatusCode());
} else {
ODataSerializer serializer = odata.createSerializer(contentType);
final ContextURL contextURL =
isODataMetadataNone(contentType)
? null
: getContextUrl(edmEntitySet, true, null, null, edmProperty.getName());
InputStream serializerContent =
complex
? serializer
.complex(
edm,
(EdmComplexType) edmProperty.getType(),
property,
ComplexSerializerOptions.with().contextURL(contextURL).build())
.getContent()
: serializer
.primitive(
edm,
(EdmPrimitiveType) edmProperty.getType(),
property,
PrimitiveSerializerOptions.with()
.contextURL(contextURL)
.scale(edmProperty.getScale())
.nullable(edmProperty.isNullable())
.precision(edmProperty.getPrecision())
.maxLength(edmProperty.getMaxLength())
.unicode(edmProperty.isUnicode())
.build())
.getContent();
response.setContent(serializerContent);
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
response.setHeader(HttpHeader.CONTENT_TYPE, contentType.toContentTypeString());
}
}
}
}