Class ResourceHandler<T extends ResourceNode>

    • Constructor Detail

      • ResourceHandler

        public ResourceHandler()
        default constructor that resolves the generic type for this class
    • Method Detail

      • createResource

        public abstract T createResource​(T resource,
                                         Context context)
        permanently create a resource
        Parameters:
        resource - the resource to store
        context - the current request context that holds additional useful information. This object is never null
        Returns:
        the stored resource with additional meta information as id, created, lastModified timestamps etc.
      • getResource

        public abstract T getResource​(String id,
                                      List<SchemaAttribute> attributes,
                                      List<SchemaAttribute> excludedAttributes,
                                      Context context)
        extract a resource by its id
        Parameters:
        id - the id of the resource to return
        authorization - should return the roles of an user and may contain arbitrary data needed in the handler implementation
        attributes - the attributes that should be returned to the client. If the client sends this parameter the evaluation of these parameters might help to improve database performance by omitting unnecessary table joins
        excludedAttributes - the attributes that should NOT be returned to the client. If the client send this parameter the evaluation of these parameters might help to improve database performance by omitting unnecessary table joins
        context - the current request context that holds additional useful information. This object is never null
        Returns:
        the found resource
      • listResources

        public abstract PartialListResponse<T> listResources​(long startIndex,
                                                             int count,
                                                             FilterNode filter,
                                                             SchemaAttribute sortBy,
                                                             SortOrder sortOrder,
                                                             List<SchemaAttribute> attributes,
                                                             List<SchemaAttribute> excludedAttributes,
                                                             Context context)
        queries several resources based on the following values
        Parameters:
        startIndex - the start index that has a minimum value of 1. So the given startIndex here will never be lower than 1
        count - the number of entries that should be returned to the client. The minimum value of this value is 0.
        filter - the parsed filter expression if the client has given a filter
        sortBy - the attribute value that should be used for sorting
        sortOrder - the sort order
        attributes - the attributes that should be returned to the client. If the client sends this parameter the evaluation of these parameters might help to improve database performance by omitting unnecessary table joins
        excludedAttributes - the attributes that should NOT be returned to the client. If the client send this parameter the evaluation of these parameters might help to improve database performance by omitting unnecessary table joins
        context - the current request context that holds additional useful information. This object is never null
        Returns:
        a list of several resources and a total results value. You may choose to leave the totalResults value blank but this might lead to erroneous results on the client side
      • updateResource

        public abstract T updateResource​(T resourceToUpdate,
                                         Context context)
        should update an existing resource with the given one. Simply use the id of the given resource and override the existing one with the given one. Be careful there have been no checks in advance for you if the resource to update does exist. This has to be done manually.

        NOTE:
        this method is also called by patch. But in the case of patch the check if the resource does exist will have been executed and the given resource is the already updated resource.
        Parameters:
        resourceToUpdate - the resource that should override an existing one
        context - the current request context that holds additional useful information. This object is never null
        Returns:
        the updated resource with the values changed and a new lastModified value
      • deleteResource

        public abstract void deleteResource​(String id,
                                            Context context)
        permanently deletes the resource with the given id
        Parameters:
        id - the id of the resource to delete
        context - the current request context that holds additional useful information. This object is never null
      • isChangePasswordSupported

        public final boolean isChangePasswordSupported()
        Returns:
        true if the value in the in the corresponding value in the ServiceProvider configuration is true, false else
      • getMaxResults

        public final int getMaxResults()
        Returns:
        the maximum results value from the current ServiceProvider configuration
      • getRequestValidator

        public RequestValidator<T> getRequestValidator()
        Returns:
        allows to define a custom request validator that is executed after schema validation and before the call to the actual ResourceHandler implementation.
      • getType

        public Class<T> getType()
        the generic type of this class
      • getSchema

        public Schema getSchema()
        allows to access the definition of the main schema
      • setSchema

        protected void setSchema​(Schema schema)
        allows to access the definition of the main schema
      • getSchemaExtensions

        public List<Schema> getSchemaExtensions()
        allows to access the attribute definitions of a schema extension
      • setSchemaExtensions

        protected void setSchemaExtensions​(List<Schema> schemaExtensions)
        allows to access the attribute definitions of a schema extension
      • getChangePasswordSupported

        public Supplier<Boolean> getChangePasswordSupported()
        gives access to the changePassword value of the current service provider configuration