DDS_LocatorFilter_t Struct Reference

Specifies the configuration of an individual channel within a MultiChannel DataWriter. More...

Data Fields
struct DDS_LocatorSeq	locators
	Sequence containing from one to 16 DDS_Locator_t, used to specify the multicast address locators of an individual channel within a MultiChannel DataWriter. More...
char *	filter_expression
	A logical expression used to determine the data that will be published in the channel. More...

Detailed Description

Specifies the configuration of an individual channel within a MultiChannel DataWriter.

QoS:

DDS_LocatorFilterQosPolicy

Field Documentation

locators

struct DDS_LocatorSeq DDS_LocatorFilter_t::locators

Sequence containing from one to 16 DDS_Locator_t, used to specify the multicast address locators of an individual channel within a MultiChannel DataWriter.

[default] Empty sequence.

filter_expression

char* DDS_LocatorFilter_t::filter_expression

A logical expression used to determine the data that will be published in the channel.

If the expression evaluates to TRUE, a sample will be published on the channel.

An empty string always evaluates the expression to TRUE.

A NULL value is not allowed.

The syntax of the expression will depend on the value of DDS_LocatorFilterQosPolicy::filter_name

Important: This value must be an allocated string with DDS_String_alloc or DDS_String_dup. It should not be assigned to a string constant.

See also

Queries and Filters Syntax

[default] NULL (invalid value)