Class LazyBundleProvider

java.lang.Object

org.openehealth.ipf.commons.ihe.fhir.AbstractBundleProvider

org.openehealth.ipf.commons.ihe.fhir.LazyBundleProvider

All Implemented Interfaces:

IBundleProvider

public class LazyBundleProvider
extends AbstractBundleProvider

Bundle provider that requests information from the RequestConsumer on request:

• If only the size of the result set is requested, the request will contain an additional empty message header named Constants.FHIR_REQUEST_SIZE_ONLY, and the response is expected to populate this header with the result size as integer value. The size is cached for further attempts to request the size
• If a subset of the result is requested, the request will contain in addition the lower and upper index in the message headers Constants.FHIR_FROM_INDEX and Constants.FHIR_TO_INDEX, respectively. The response is expected to contain this result subset.

Note: instances of this class is neither thread-safe nor can they be reused across requests

Field Summary

Fields inherited from class AbstractBundleProvider

httpServletResponse

Constructor Summary

Constructors

Constructor	Description
LazyBundleProvider(RequestConsumer consumer, boolean cacheResults, boolean sort, Object payload, Map<String,Object> headers, jakarta.servlet.http.HttpServletResponse httpServletResponse)	Initializes a lazy bundle provider
LazyBundleProvider(RequestConsumer consumer, boolean cacheResults, Object payload, Map<String,Object> headers, jakarta.servlet.http.HttpServletResponse httpServletResponse)	Initializes a lazy bundle provider

Method Summary

Modifier and Type	Method	Description
LazyBundleProvider	boundTo(RequestDetails requestDetails)	Further pages are loaded by calling the consumer again, which must not see the servlet request and response of the original request anymore.
@NonNull List<IBaseResource>	getResources(int fromIndex, int toIndex)
Integer	size()

Methods inherited from class AbstractBundleProvider

getConsumer, getHeaders, getPayload, getPublished, getUuid, obtainResources, preferredPageSize, sortIfApplicable

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface IBundleProvider

containsAllResources, getAllResourceIds, getAllResources, getCurrentPageId, getCurrentPageOffset, getCurrentPageSize, getNextPageId, getPreviousPageId, getResourceListComplete, getResources, isEmpty, sizeOrThrowNpe

Constructor Details

LazyBundleProvider

public LazyBundleProvider(RequestConsumer consumer,
 boolean cacheResults,
 Object payload,
 Map<String,Object> headers,
 jakarta.servlet.http.HttpServletResponse httpServletResponse)

Initializes a lazy bundle provider

Parameters:

consumer - FHIR consumer that uses ths provider

cacheResults - cache results. So far, only the result set size is cached

payload - incoming payload

headers - incoming headers

httpServletResponse - HTTP servlet response

LazyBundleProvider

public LazyBundleProvider(RequestConsumer consumer,
 boolean cacheResults,
 boolean sort,
 Object payload,
 Map<String,Object> headers,
 jakarta.servlet.http.HttpServletResponse httpServletResponse)

Initializes a lazy bundle provider

Parameters:

consumer - FHIR consumer that uses ths provider

cacheResults - cache results. So far, only the result set size is cached

sort - sort results

payload - incoming payload

headers - incoming headers

httpServletResponse - HTTP servlet response

Method Details

boundTo

public LazyBundleProvider boundTo(RequestDetails requestDetails)

Further pages are loaded by calling the consumer again, which must not see the servlet request and response of the original request anymore.

Overrides:

boundTo in class AbstractBundleProvider

Parameters:

requestDetails - the request that is being processed now

Returns:

a bundle provider bound to the request, or this instance if it does not need to be bound

getResources

@NonNull
public @NonNull List<IBaseResource> getResources(int fromIndex,
 int toIndex)

size

public Integer size()