Package com.ibm.fhir.search.util

Class SearchUtil

  • public class SearchUtil
extends Object
    Search Utility
    This class uses FHIRPath Expressions (and currently does not support XPath) and uses init to activate the Parameters/Compartments/ValueTypes components.

    • Method Detail

      • init

        public static void init()
        Initializes the various services related to Search and pre-caches.
        Loads the class in the classloader to initialize static members. Call this before using the class in order to avoid a slight performance hit on first use.

      • getSearchParameter

        public static SearchParameter getSearchParameter​(Class<?> resourceType,
                                                 String code)
                                          throws Exception
        Parameters:
        resourceType -
        code -
        Returns:
        the SearchParameter for type resourceType with code code or null if it doesn't exist
        Throws:
        Exception

      • getSearchParameter

        public static SearchParameter getSearchParameter​(String resourceType,
                                                 String code)
                                          throws Exception
        Parameters:
        resourceType -
        code -
        Returns:
        the SearchParameter for type resourceType with code code or null if it doesn't exist
        Throws:
        Exception

      • getSearchParameter

        public static SearchParameter getSearchParameter​(Class<?> resourceType,
                                                 Canonical uri)
                                          throws Exception
        Parameters:
        resourceType -
        uri -
        Returns:
        the SearchParameter for type resourceType with url uri or null if it doesn't exist
        Throws:
        Exception

      • getSearchParameter

        public static SearchParameter getSearchParameter​(String resourceType,
                                                 Canonical uri)
                                          throws Exception
        Parameters:
        resourceType -
        uri -
        Returns:
        the SearchParameter for type resourceType with canonical url uri or null if it doesn't exist
        Throws:
        Exception

      • findImplicitSystem

        public static String findImplicitSystem​(List<Extension> extensions)
        Look up the http://ibm.com/fhir/extension/implicit-system extension in the given list of Extensions
        Parameters:
        extensions -
        Returns:
        the implicit system value, or null if not found

      • extractReferenceValue

        public static String extractReferenceValue​(String valueString)
                                    throws FHIRSearchException
        Convert the string to a reference value usable by the persistence layer. This simply involves removing the URL prefix if it matches the originalUri in the request context
        Parameters:
        valueString -
        Returns:
        Throws:
        FHIRSearchException

      • getSearchParameters

        public static Map<String,​SearchParameter> getSearchParameters​(String resourceType)
                                                             throws Exception
        Returns a map of code to SearchParameter that consist of those associated with the "Resource" base resource type, as well as those associated with the specified resource type.
        Returns:
        the applicable search parameters for the current request context, indexed by code; never null
        Throws:
        Exception

      • parseReadQueryParameters

        public static FHIRSearchContext parseReadQueryParameters​(Class<?> resourceType,
                                                         Map<String,​List<String>> queryParameters,
                                                         String interaction,
                                                         boolean lenient)
                                                  throws Exception
        Parse query parameters for read and vread.
        Parameters:
        resourceType - the resource type
        queryParameters - the query parameters
        interaction - read or vread
        lenient - true if lenient, false if strict
        Returns:
        the FHIR search context
        Throws:
        Exception - an exception

      • useStoredCompartmentParam

        public static boolean useStoredCompartmentParam()
        Check the configuration to see if the flag enabling the compartment search optimization. Defaults to false so the behavior won't change unless it is explicitly enabled in fhir-server-config. This is important, because existing data must be reindexed (see $reindex custom operation) to generate values for the ibm-internal compartment relationship params.
        Returns:

      • parseCompartmentQueryParameters

        public static FHIRSearchContext parseCompartmentQueryParameters​(String compartmentName,
                                                                String compartmentLogicalId,
                                                                Class<?> resourceType,
                                                                Map<String,​List<String>> queryParameters,
                                                                boolean lenient)
                                                         throws Exception
        Parameters:
        lenient - Whether to ignore unknown or unsupported parameter
        Returns:
        Throws:
        Exception

      • buildInclusionCriteria

        public static QueryParameter buildInclusionCriteria​(String compartmentName,
                                                    Set<String> compartmentLogicalIds,
                                                    String resourceType)
                                             throws FHIRSearchException
        Build a query parameter to encapsulate the inclusion criteria for a compartment query
        Parameters:
        compartmentName -
        compartmentLogicalIds -
        resourceType -
        Returns:
        Throws:
        FHIRSearchException

      • isSearchResultParameter

        public static boolean isSearchResultParameter​(String name)
        Determine if the parameter is a search result parameter.
        Parameters:
        name - - the parameter name
        Returns:
        true if the parameter is a search result parameter, false otherwise

      • isSearchSingletonParameter

        public static boolean isSearchSingletonParameter​(String name)

      • isGeneralParameter

        public static boolean isGeneralParameter​(String name)

      • isChainedParameter

        public static boolean isChainedParameter​(String name)

      • isReverseChainedParameter

        public static boolean isReverseChainedParameter​(String code)

      • parseChainedInclusionCriteria

        public static QueryParameter parseChainedInclusionCriteria​(QueryParameter inclusionCriteriaParm)
        Transforms the passed QueryParameter representing chained inclusion criteria, into an actual chain of QueryParameter objects. This method consumes QueryParameters with names of this form: 
         "{attribute1}.{attribute2}:{resourceType}"
        For specific examples of chained inclusion criteria, see the FHIR spec for the Patient compartment
        Parameters:
        inclusionCriteriaParm -
        Returns:
        QueryParameter - The root of a parameter chain for chained inclusion criteria.

      • normalizeForSearch

        public static String normalizeForSearch​(String value)
        Normalizes a string to be used as a search parameter value. All accents and diacritics are removed. Consecutive whitespace characters are replaced with a single space. And then the string is transformed to lower case.
        Parameters:
        value - the string to normalize
        Returns:
        the normalized string

      • getSummaryTextElementNames

        public static Set<String> getSummaryTextElementNames​(Class<?> resourceType)
        Return only the "text" element, the 'id' element, the 'meta' element, and only top-level mandatory elements. The id, meta and the top-level mandatory elements will be added by the ElementFilter automatically.
        Parameters:
        resourceType -
        Returns:

      • extractCompartmentParameterValues

        public static Map<String,​Set<CompartmentReference>> extractCompartmentParameterValues​(Resource fhirResource,
                                                                                            Map<String,​Set<String>> compartmentRefParams)
                                                                                     throws FHIRSearchException
        Extracts the parameter values defining compartment membership.
        Parameters:
        fhirResource -
        compartmentRefParams - a map of parameter names to a set of compartment names (resource types)
        Returns:
        a map of compartment name to a set of unique compartment reference values
        Throws:
        FHIRSearchException

      • makeCompositeSubCode

        public static String makeCompositeSubCode​(String compositeCode,
                                          String subParameterCode)
        Build a parameter name (code) which can be used to uniquely represent the stored composite sub-parameter (the values get added to the parameter_names table). We use a prefix just to avoid any (albeit already remote) possibility of collision. Also makes these more visible as something added by the implementation code, not from a configuration file.
        Parameters:
        compositeCode -
        subParameterCode -
        Returns:

      • containsInclusionParameter

        public static boolean containsInclusionParameter​(Set<String> searchParameterCodes)
        Check if the list of search parameters contains either _include or _revinclude.
        Parameters:
        searchParameterCodes - the set of search parameters to check
        Returns:
        true if either _include or _revinclude found, false otherwise

      • checkInclusionIterateParameters

        public static void checkInclusionIterateParameters​(String resourceType,
                                                   FHIRSearchContext context,
                                                   boolean lenient)
                                            throws FHIRSearchException
        Check if _include or _revinclude parameters with the :iterate modifier reference invalid resource types. If in strict mode, throw a FHIRSearchException. If in lenient mode, log the invalid parameters and remove those parameters from the search context.
        Parameters:
        resourceType - the search resource type
        context - the search context
        lenient - flag indicating lenient or strict mode
        Throws:
        FHIRSearchException

      • isCompartmentSearch

        public static boolean isCompartmentSearch​(FHIRSearchContext searchContext)
        Inspect the searchContext to see if the parameters define a compartment-based search. This is useful to know because it allows an implementation to enable optimizations specific to compartment-based searches.
        Parameters:
        searchContext -
        Returns: