RTI Connext Java API
Version 5.3.1
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<<interface>> These are specialised com.rti.dds.subscription.ReadCondition objects that allow the application to also specify a filter on the locally available data. More...
Public Member Functions | |
String | get_query_expression () |
Retrieves the query expression. | |
void | get_query_parameters (StringSeq query_parameters) |
Retrieves the query parameters. | |
void | set_query_parameters (StringSeq query_parameters) |
Sets the query parameters. | |
Public Member Functions inherited from ReadCondition | |
int | get_sample_state_mask () |
Retrieves the set of sample_states for the condition. | |
int | get_view_state_mask () |
Retrieves the set of view_states for the condition. | |
int | get_instance_state_mask () |
Retrieves the set of instance_states for the condition. | |
int | get_stream_kind_mask () |
Retrieves the set of stream kind mask for the condition. | |
DataReader | get_datareader () |
Returns the com.rti.dds.subscription.DataReader associated with the com.rti.dds.subscription.ReadCondition. | |
Public Member Functions inherited from Condition | |
boolean | get_trigger_value () |
Retrieve the trigger_value . | |
<<interface>> These are specialised com.rti.dds.subscription.ReadCondition objects that allow the application to also specify a filter on the locally available data.
Each query condition filter is composed of a com.rti.dds.subscription.ReadCondition state filter and a content filter expressed as a query_expression
and query_parameters
.
The query (query_expression
) is similar to an SQL WHERE clause and can be parameterised by arguments that are dynamically changeable by the set_query_parameters() operation.
Two query conditions that have the same query_expression
will require unique query condition content filters if their query_paramters
differ. Query conditions that differ only in their state masks will share the same query condition content filter.
Queries and Filters Syntax describes the syntax of query_expression
and query_parameters
.
String get_query_expression | ( | ) |
Retrieves the query expression.
void get_query_parameters | ( | StringSeq | query_parameters | ) |
Retrieves the query parameters.
query_parameters | <<inout>> the query parameters are returned here. |