public function get_collection_params() {
		$params                       = parent::get_collection_params();
		$params['context']['default'] = 'view';

		$params['exclude'] = array(
			'description'       => __( 'Ensure result set excludes specific IDs.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['include'] = array(
			'description'       => __( 'Ensure result set includes specific IDs.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['order'] = array(
			'description'       => __( 'Order sort attribute ascending or descending.', 'buddypress' ),
			'default'           => 'desc',
			'type'              => 'string',
			'enum'              => array( 'asc', 'desc' ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['after'] = array(
			'description'       => __( 'Limit result set to items published after a given ISO8601 compliant date.', 'buddypress' ),
			'type'              => 'string',
			'format'            => 'date-time',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['user_id'] = array(
			'description'       => __( 'Limit result set to items created by a specific user (ID).', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['status'] = array(
			'description'       => __( 'Limit result set to items with a specific status.', 'buddypress' ),
			'default'           => 'ham_only',
			'type'              => 'string',
			'enum'              => array( 'ham_only', 'spam_only', 'all' ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['group_id'] = array(
			'description'       => __( 'Limit result set to items created by a specific group.', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['site_id'] = array(
			'description'       => __( 'Limit result set to items created by a specific site.', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['primary_id'] = array(
			'description'       => __( 'Limit result set to items with a specific prime association ID.', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['secondary_id'] = array(
			'description'       => __( 'Limit result set to items with a specific secondary association ID.', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['component'] = array(
			'description'       => __( 'Limit result set to items with a specific active BuddyPress component.', 'buddypress' ),
			'type'              => 'string',
			'enum'              => array_keys( buddypress()->active_components ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['type'] = array(
			'description'       => __( 'Limit result set to items with a specific activity type.', 'buddypress' ),
			'type'              => 'string',
			'enum'              => array_keys( bp_activity_get_types() ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['display_comments'] = array(
			'description'       => __( 'No comments by default, stream for within stream display, threaded for below each activity item.', 'buddypress' ),
			'default'           => '',
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		/**
		 * Filters the collection query params.
		 *
		 * @param array $params Query params.
		 */
		return apply_filters( 'bp_rest_activity_collection_params', $params );
	}