Examples with EntityhubException org.apache.stanbol.entityhub.servicesapi.EntityhubException used on opensource projects

Example 6 with EntityhubException

use of org.apache.stanbol.entityhub.servicesapi.EntityhubException in project stanbol by apache.

the class EntityhubRootResource method getEntityMapping.

@GET
@Path("mapping/entity")
@Produces({ APPLICATION_JSON, RDF_XML, N3, TURTLE, X_TURTLE, RDF_JSON, N_TRIPLE, TEXT_HTML })
public Response getEntityMapping(@QueryParam("id") String entity, @Context HttpHeaders headers) throws WebApplicationException {
    log.debug("getEntityMapping() POST Request > entity: {} > accept: {}", entity, headers.getAcceptableMediaTypes());
    Set<String> supported = new HashSet<String>(JerseyUtils.REPRESENTATION_SUPPORTED_MEDIA_TYPES);
    supported.add(TEXT_HTML);
    MediaType acceptedMediaType = getAcceptableMediaType(headers, supported, APPLICATION_JSON_TYPE);
    if (entity == null || entity.isEmpty()) {
        //if HTML -> print the docu of the restfull service
        if (TEXT_HTML_TYPE.isCompatible(acceptedMediaType)) {
            ResponseBuilder rb = Response.ok(new Viewable("mapping_entity", this));
            rb.header(HttpHeaders.CONTENT_TYPE, TEXT_HTML + "; charset=utf-8");
        //addCORSOrigin(servletContext, rb, headers);
        } else {
            return Response.status(Status.BAD_REQUEST).entity("No entity given. Missing parameter id.\n").header(HttpHeaders.ACCEPT, acceptedMediaType).build();
        }
    }
    //Entityhub entityhub = ContextHelper.getServiceFromContext(Entityhub.class, servletContext);
    Entity mapping;
    try {
        mapping = entityhub.getMappingBySource(entity);
    } catch (EntityhubException e) {
        throw new WebApplicationException(e, INTERNAL_SERVER_ERROR);
    }
    if (mapping == null) {
        return Response.status(Status.NOT_FOUND).entity("No mapping found for entity '" + entity + "'.\n").header(HttpHeaders.ACCEPT, acceptedMediaType).build();
    } else {
        ResponseBuilder rb = Response.ok(mapping);
        rb.header(HttpHeaders.CONTENT_TYPE, acceptedMediaType + "; charset=utf-8");
        //addCORSOrigin(servletContext, rb, headers);
        return rb.build();
    }
}

Example 7 with EntityhubException

use of org.apache.stanbol.entityhub.servicesapi.EntityhubException in project stanbol by apache.

the class EntityhubRootResource method getSymbolMappings.

@GET
@Path("mapping/symbol")
@Produces({ APPLICATION_JSON, RDF_XML, N3, TURTLE, X_TURTLE, RDF_JSON, N_TRIPLE, TEXT_HTML })
public Response getSymbolMappings(@QueryParam("id") String symbol, @Context HttpHeaders headers) throws WebApplicationException {
    log.debug("getSymbolMappings() POST Request > symbol: {} > accept: {}", symbol, headers.getAcceptableMediaTypes());
    Set<String> supported = new HashSet<String>(JerseyUtils.REPRESENTATION_SUPPORTED_MEDIA_TYPES);
    supported.add(TEXT_HTML);
    MediaType acceptedMediaType = getAcceptableMediaType(headers, supported, APPLICATION_JSON_TYPE);
    if (symbol == null || symbol.isEmpty()) {
        //if HTML -> print the docu of the restfull service
        if (TEXT_HTML_TYPE.isCompatible(acceptedMediaType)) {
            ResponseBuilder rb = Response.ok(new Viewable("mapping_symbol", this));
            rb.header(HttpHeaders.CONTENT_TYPE, TEXT_HTML + "; charset=utf-8");
            //addCORSOrigin(servletContext, rb, headers);
            return rb.build();
        } else {
            return Response.status(Status.BAD_REQUEST).entity("No symbol given. Missing parameter id.\n").header(HttpHeaders.ACCEPT, acceptedMediaType).build();
        }
    }
    //Entityhub entityhub = ContextHelper.getServiceFromContext(Entityhub.class, servletContext);
    Collection<Entity> mappings;
    try {
        mappings = entityhub.getMappingsByTarget(symbol);
    } catch (EntityhubException e) {
        throw new WebApplicationException(e, INTERNAL_SERVER_ERROR);
    }
    if (mappings == null || mappings.isEmpty()) {
        return Response.status(Status.NOT_FOUND).entity("No mapping found for symbol '" + symbol + "'.\n").header(HttpHeaders.ACCEPT, acceptedMediaType).build();
    } else {
        // TODO: Implement Support for list of Signs, Representations and Strings
        // For now use a pseudo QueryResultList
        QueryResultList<Entity> mappingResultList = new QueryResultListImpl<Entity>(null, mappings, Entity.class);
        ResponseBuilder rb = Response.ok(mappingResultList);
        rb.header(HttpHeaders.CONTENT_TYPE, acceptedMediaType + "; charset=utf-8");
        //addCORSOrigin(servletContext, rb, headers);
        return rb.build();
    }
}

Example 8 with EntityhubException

use of org.apache.stanbol.entityhub.servicesapi.EntityhubException in project stanbol by apache.

the class EntityhubRootResource method executeQuery.

/**
     * Executes the query parsed by {@link #queryEntities(String, File, HttpHeaders)}
     * or created based {@link #findEntity(String, String, String, String, HttpHeaders)
     * @param query The query to execute
     * @param headers The headers used to determine the media types
     * @return the response (results of error)
     */
private Response executeQuery(FieldQuery query, HttpHeaders headers, MediaType acceptedMediaType) throws WebApplicationException {
    //Entityhub entityhub = ContextHelper.getServiceFromContext(Entityhub.class, servletContext);
    if (query instanceof LDPathSelect && ((LDPathSelect) query).getLDPathSelect() != null) {
        //use the LDPath variant to process this query
        return executeLDPathQuery(entityhub, query, ((LDPathSelect) query).getLDPathSelect(), acceptedMediaType, headers);
    } else {
        //use the default query execution
        QueryResultList<Representation> result;
        try {
            result = entityhub.find(query);
        } catch (EntityhubException e) {
            String message = String.format("Exception while performing the " + "FieldQuery on the EntityHub (message: %s)", e.getMessage());
            log.error(message, e);
            return Response.status(Status.INTERNAL_SERVER_ERROR).entity(message).header(HttpHeaders.ACCEPT, acceptedMediaType).build();
        }
        ResponseBuilder rb = Response.ok(result);
        rb.header(HttpHeaders.CONTENT_TYPE, acceptedMediaType + "; charset=utf-8");
        //addCORSOrigin(servletContext, rb, headers);
        return rb.build();
    }
}

Example 9 with EntityhubException

use of org.apache.stanbol.entityhub.servicesapi.EntityhubException in project stanbol by apache.

the class EntityhubRootResource method executeLDPathQuery.

/**
     * Execute a Query that uses LDPath to process results.
     * @param query the query
     * @param mediaType the mediaType for the response
     * @param headers the http headers of the request
     * @return the response
     */
private Response executeLDPathQuery(Entityhub entityhub, FieldQuery query, String ldpathProgramString, MediaType mediaType, HttpHeaders headers) {
    QueryResultList<Representation> result;
    ValueFactory vf = new RdfValueFactory(new IndexedGraph());
    EntityhubBackend backend = new EntityhubBackend(entityhub);
    EntityhubLDPath ldPath = new EntityhubLDPath(backend, vf);
    //copy the selected fields, because we might need to delete some during
    //the preparation phase
    Set<String> selectedFields = new HashSet<String>(query.getSelectedFields());
    //first prepare (only execute the query if the parameters are valid)
    Program<Object> program;
    try {
        program = prepareQueryLDPathProgram(ldpathProgramString, selectedFields, backend, ldPath);
    } catch (LDPathParseException e) {
        log.warn("Unable to parse LDPath program used as select for Query:");
        log.warn("FieldQuery: \n {}", query);
        log.warn("LDPath: \n {}", ((LDPathSelect) query).getLDPathSelect());
        log.warn("Exception:", e);
        return Response.status(Status.BAD_REQUEST).entity(("Unable to parse LDPath program (Messages: " + getLDPathParseExceptionMessage(e) + ")!\n")).header(HttpHeaders.ACCEPT, mediaType).build();
    } catch (IllegalStateException e) {
        log.warn("parsed LDPath program is not compatible with parsed Query!", e);
        return Response.status(Status.BAD_REQUEST).entity(e.getMessage()).header(HttpHeaders.ACCEPT, mediaType).build();
    }
    //2. execute the query
    Iterator<Representation> resultIt;
    try {
        // go directly to the yard and query there for Representations
        resultIt = entityhub.getYard().findRepresentation(query).iterator();
    } catch (EntityhubException e) {
        String message = String.format("Exception while performing the " + "FieldQuery on the EntityHub (message: %s)", e.getMessage());
        log.error(message, e);
        return Response.status(Status.INTERNAL_SERVER_ERROR).entity(message).header(HttpHeaders.ACCEPT, mediaType).build();
    }
    //process the results
    Collection<Representation> transformedResults = transformQueryResults(resultIt, program, selectedFields, ldPath, backend, vf);
    result = new QueryResultListImpl<Representation>(query, transformedResults, Representation.class);
    ResponseBuilder rb = Response.ok(result);
    rb.header(HttpHeaders.CONTENT_TYPE, mediaType + "; charset=utf-8");
    //addCORSOrigin(servletContext, rb, headers);
    return rb.build();
}

Example 10 with EntityhubException

use of org.apache.stanbol.entityhub.servicesapi.EntityhubException in project stanbol by apache.

the class EntityhubSearcher method lookup.

@Override
public Collection<? extends Entity> lookup(IRI field, Set<IRI> includeFields, List<String> search, String[] languages, Integer limit, Integer offset) throws EntitySearcherException {
    Entityhub entityhub = getSearchService();
    if (entityhub == null) {
        throw new EntitySearcherException("The Entityhub is currently not active");
    }
    FieldQuery query = EntitySearcherUtils.createFieldQuery(entityhub.getQueryFactory(), field, includeFields, search, languages);
    if (limit != null && limit > 0) {
        query.setLimit(limit);
    } else if (this.limit != null) {
        query.setLimit(this.limit);
    }
    if (offset != null && offset.intValue() > 0) {
        query.setOffset(offset.intValue());
    }
    QueryResultList<Representation> results;
    try {
        results = entityhub.find(query);
    } catch (EntityhubException e) {
        throw new EntitySearcherException("Exception while searchign for " + search + '@' + Arrays.toString(languages) + "in the Entityhub", e);
    }
    if (!results.isEmpty()) {
        Set<String> languagesSet = new HashSet<String>(Arrays.asList(languages));
        Collection<Entity> entities = new ArrayList<Entity>(results.size());
        for (Representation result : results) {
            entities.add(new EntityhubEntity(result, null, languagesSet));
        }
        return entities;
    } else {
        return Collections.emptyList();
    }
}