DDS_LocatorFilter_t Struct Reference
[LOCATORFILTER]

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

List of all members.

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

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Detailed Description

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

QoS:

DDS_LocatorFilterQosPolicy

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Member Data Documentation

struct DDS_LocatorSeq DDS_LocatorFilter_t::locators [read]

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

[default] Empty sequence.

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)