TweetSearcher

Tweets

Upon successful completion of the search, the transformer will output a new feature for each tweet in the search results. Each output feature will contain several attributes:

_tweet_id: The identification number of the search result.

_tweet_user: The name of the Twitter user who created the search result.

_tweet_text: The text of the search result.

_tweet_created_at: The date and time of the status update. This will be formatted in the standard FME date/time format: YYYYMMDDHHMMSS

_tweet_search_result: The JSON text of the search result. This can be further examined via the JSONFragmenter and JSONExtractor transformers.

Error

If the search could not be completed, the feature will be output through the Error output port, and will have the following new attributes:

_twitter_search_result: If a response was received from the Twitter server, it will be stored in this attribute.

_twitter_error: If the Twitter response contained an error message, it will be stored in this attribute.

Search

Twitter Search Text	Type a search query or select the name of an attribute that contains the query.
Result Type	Select the type of Tweets to search for. The options are Recent, Popular and Mixed. The value of this parameter may affect the number of search results that are returned.
Maximum Number of Results	Specifies an upper bound on the number of search results returned, and therefore the maximum number of features output from the transformer.

Geocode

Search for Geocoded Tweets

If this parameter is set to Yes, the transformer will restrict its search to geocoded tweets. These are tweets which have been tagged with lat/long location data. The center of gravity of the feature’s geometry will be used as the center point of the search area.

Note that Geocoded Tweets may also include non-geocoded tweets if a user has set their location in Twitter settings, and that location falls within the search parameters (but does not have proper lat/long coordinates).

In these cases, the TweetSearcher will add an additional attribute: _tweet_geo. To exclude these results, you can attach a Tester transformer to filter out non-geocoded Tweets. Set the test to _tweet_geo = "null".

Search Radius/Radius Units

When searching for geocoded tweets, these parameters control the radius of the search area. The units may be set to Kilometers or Miles, and only tweets within the search radius from the search center point will be returned.

Twitter Account

Account

Select or create a Web Connection to connect to a Twitter account.

How to Set Parameter Values

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters.

Using the Text Editor

The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.

Text Editor

Using the Arithmetic Editor

The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

Arithmetic Editor

Conditional Values

Set values depending on one or more test conditions that either pass or fail.

Parameter Condition Definition Dialog

Content

Expressions and strings can include a number of functions, characters, parameters, and more.

When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Dialog Options - Tables

Table Tools

Transformers with table-style parameters have additional tools for populating and manipulating values.

Row Reordering

Enabled once you have clicked on a row item. Choices include:

Add a row
Remove a row
Move current row up one
Move current row down one
Move current row to top
Move current row to bottom

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:

Cut a row - delete and copy to clipboard
Copy a row to the clipboard
Paste a row from the clipboard

Cut, copy, and paste may be used within a transformer, or between transformers.

Filter

Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output.

Import

Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

Reset/Refresh

Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers.

Note: Not all tools are available in all transformers.

TweetSearcher

Configuration

Output Ports

Parameters

Editing Transformer Parameters

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