TopicQuerySelection Class Reference

<<extension>> Specifies the data query that defines a com.rti.dds.subscription.TopicQuery More...

Inheritance diagram for TopicQuerySelection:

Public Member Functions
Object	copy_from (Object src)
Object	copy_from (Object src)
	Copy value of a data type from source. More...

Public Attributes
String	filter_class_name = null
	The name of the filter to use. More...
String	filter_expression = null
	The filter expression. More...
StringSeq	filter_parameters = new StringSeq()
	The query parameters. More...
TopicQuerySelectionKind	kind
	Indicates whether the sample selection is limited to cached samples or not. More...

Detailed Description

<<extension>> Specifies the data query that defines a com.rti.dds.subscription.TopicQuery

The query format is similar to the expression and parameters of a com.rti.dds.subscription.QueryCondition or a com.rti.dds.topic.ContentFilteredTopic, as described in com.rti.dds.domain.DomainParticipant.create_contentfilteredtopic_with_filter.

There are two special queries:

• com.rti.dds.subscription.DataReader.TOPIC_QUERY_SELECTION_SELECT_ALL
• com.rti.dds.subscription.DataReader.TOPIC_QUERY_SELECTION_USE_READER_CONTENT_FILTER

See also

Queries and Filters Syntax

Member Function Documentation

copy_from()

Object copy_from

(

Object

src

)

This is the implementation of the Copyable interface. This method will perform a deep copy of src This method could be placed into TopicQuerySelectionTypeSupport rather than here by using the -noCopyable option to rtiddsgen.

Parameters

src	The Object which contains the data to be copied.

Returns

Returns this.

Exceptions

NullPointerException	If src is null.
ClassCastException	If src is not the same type as this.

See also

com.rti.dds.infrastructure.Copyable::copy_from(java.lang.Object)

Implements Copyable.

References StringSeq.copy_from(), TopicQuerySelection.filter_class_name, TopicQuerySelection.filter_expression, TopicQuerySelection.filter_parameters, and TopicQuerySelection.kind.

Referenced by TopicQueryData.copy_from().

Member Data Documentation

filter_class_name

String filter_class_name = null

The name of the filter to use.

Name of content filter to use. Must be one of the built-in filter names or previously registered with com.rti.dds.domain.DomainParticipant.register_contentfilter on the same com.rti.dds.domain.DomainParticipant.

Built-in filter names are com.rti.dds.domain.DomainParticipant.SQLFILTER_NAME and com.rti.dds.domain.DomainParticipant.STRINGMATCHFILTER_NAME.

[default] See com.rti.dds.subscription.DataReader.TOPIC_QUERY_SELECTION_USE_READER_CONTENT_FILTER

Referenced by TopicQuerySelection.copy_from().

filter_expression

String filter_expression = null

The filter expression.

The expression to filter samples in the DataWriters. It follows the format described in Queries and Filters Syntax.

[default] See com.rti.dds.subscription.DataReader.TOPIC_QUERY_SELECTION_USE_READER_CONTENT_FILTER

See also

Queries and Filters Syntax

Referenced by TopicQuerySelection.copy_from().

filter_parameters

StringSeq filter_parameters = new StringSeq()

The query parameters.

[default] See com.rti.dds.subscription.DataReader.TOPIC_QUERY_SELECTION_USE_READER_CONTENT_FILTER

See also

com.rti.dds.domain.DomainParticipant.create_contentfilteredtopic_with_filter.

Referenced by TopicQuerySelection.copy_from().

kind

TopicQuerySelectionKind kind

Initial value:

= 
            TopicQuerySelectionKind.HISTORY_SNAPSHOT

Indicates whether the sample selection is limited to cached samples or not.

[default] com.rti.dds.subscription.TopicQuerySelectionKind.HISTORY_SNAPSHOT

Referenced by TopicQuerySelection.copy_from().