Examples of org.apache.stanbol.entityhub.servicesapi.model.Entity

Package org.apache.stanbol.entityhub.servicesapi.model

Examples of org.apache.stanbol.entityhub.servicesapi.model.Entity

org.apache.stanbol.entityhub.servicesapi.model.Entity
A Sign links three things together
1. the signifier (ID) used to identify the sign
2. the description (Representation) for the signified entity
3. the organisation (Site) that provides this description
@author Rupert Westenthaler

                    .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);
        }

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    @Override
    public Representation get(String id,Set<String> includeFields) {
        if(id == null || id.isEmpty()){
            return null;
        }
        Entity entity;
        ReferencedSite site = getSearchService();
        if(site == null){
            throw new IllegalStateException("ReferencedSite "+siteId+" is currently not available");
        }
        try {
            entity = site.getEntity(id);
        }  catch (ReferencedSiteException e) {
            throw new IllegalStateException("Exception while getting "+id+
                " from the ReferencedSite "+site.getId(),e);
        }
        return entity == null ? null : entity.getRepresentation();
    }

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    protected FieldQuery createQuery() {
        return site.getQueryFactory().createFieldQuery();
    }
    @Override
    protected Representation getRepresentation(String id) throws EntityhubException {
        Entity entity = site.getEntity(id);
        return entity != null ? entity.getRepresentation():null;
    }

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    protected FieldQuery createQuery() {
        return qf.createFieldQuery();
    }
    @Override
    protected Representation getRepresentation(String id) throws EntityhubException {
        Entity entity = siteManager.getEntity(id);
        return entity != null ? entity.getRepresentation() : null;
    }

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                    .entity("No or empty ID was parsed. Missing parameter id.\n")
                    .header(HttpHeaders.ACCEPT, acceptedMediaType).build();
            }
        }
        log.info("handle Request for Entity {} of Site {}", id, site.getId());
        Entity entity;
        try {
            entity = site.getEntity(id);
        } catch (ReferencedSiteException e) {
            log.error("ReferencedSiteException while accessing Site " + site.getConfiguration().getName() + 
                " (id=" + site.getId() + ")", e);

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        return lookupLocalEntity(entity,false);
    }


    @Override
    public Entity lookupLocalEntity(String entityId, boolean create) throws YardException {
        Entity entity = getEntity(entityId);
        if(entity != null){
            return entity;
        } else {
            //parsed reference was not a locally managed entity ->
            //search for an mapped Entity
            Entity entityMapping = getMappingBySource(entityId);
            if(entityMapping != null){
                entity = getEntity(EntityMapping.getTargetId(entityMapping));
                if(entity != null){
                    return entity;
                } else {
                    log.warn("Unable to find Entity for Entity Mapping "+entityMapping+"!");
                    return recoverEntity(EntityMapping.getTargetId(entityMapping));
                }
            } else if(create){
                //search if the parsed reference is known by any referenced site
                // and if YES, create a new Symbol
                Entity remoteEntity = siteManager.getEntity(entityId);
                 if(remoteEntity == null){ //id not found by any referred site
                     return null;
                 } else {
                     return importEntity(remoteEntity);
                 }

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            }
        }
    }
    @Override
    public Entity importEntity(String reference) throws IllegalStateException, IllegalArgumentException, YardException {
        Entity entity = getEntity(reference);
        if(entity == null){
            Entity entityMapping = getMappingBySource(reference);
            if(entityMapping == null){
                Entity remoteEntity = siteManager.getEntity(reference);
                if(remoteEntity == null){
                    return null;
                } else {
                    return importEntity(remoteEntity);
                }

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    public Entity getEntity(String entityId) throws IllegalArgumentException,IllegalStateException, YardException {
        if(entityId == null || entityId.isEmpty()){
            throw new IllegalArgumentException("The parsed id MUST NOT be NULL nor empty!");
        }
        Yard entityhubYard = lookupYard();
        Entity entity = loadEntity(entityhubYard, entityId);
        if(entity == null){
            return null;
        } else if (ManagedEntity.canWrap(entity)){
            return entity;
        } else {

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            throw new IllegalArgumentException("The parsed Representation MUST NOT be NULL!");
        }
        Yard yard = lookupYard();
        //parse only the id of the representation, because we need the current
        //stored version of the entity!
        Entity entity = loadEntity(yard, representation.getId());
        //now we need to check if the parsed representation is the data or the
        //metadata of the Entity
        ManagedEntity updated;
        if(entity == null || representation.getId().equals(entity.getRepresentation().getId())){
            //update the data or create a new entity
            updated = ManagedEntity.init(new EntityImpl(config.getID(), representation,
                entity != null ? entity.getMetadata() : null),
                config.getDefaultManagedEntityState());
            if(entity == null){ //add creation date
                updated.setCreated(new Date());
            }
        } else {
            //update the metadata
            entity = new EntityImpl(config.getID(), entity.getRepresentation(),
                representation);
            //we need to validate the metadata
            updated = ManagedEntity.init(
                entity, config.getDefaultManagedEntityState());
        }

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    public Entity delete(String id) throws EntityhubException, IllegalArgumentException {
        if(id == null || id.isEmpty()){
            throw new IllegalArgumentException("The parsed id MUST NOT be NULL nor emtpty!");
        }
        Yard yard = lookupYard();
        Entity entity = loadEntity(yard, id);
        if(entity != null){
            log.debug("delete Entity {} as requested by the parsed id {}",entity.getId(),id);
            //we need to remove all mappings for this Entity
            deleteMappingsbyTarget(yard,entity.getId());
            deleteEntity(yard,entity);
        } else {
            log.debug("Unable to delete Entity for id {}, because no Entity for this id is" +
                "managed by the Entityhub",id);
        }

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