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The Data Call Graph scope offers a view based on the individual Data Call Graphs that exist in the current Application. A "call graph" is a view showing "Entry Points to End Points/Data Entities".

  • Data Call Graphs option will be deactivated if there are no call graphs.
  • For any call graph, you cannot hide a grouped node.

Click to enlarge

Accessing the Data Call Graph scope

To access the Data Call Graph scope, click the Data call graph entry in the Investigation panel:

Choose a specific Data call graph to display. Data call graphs are listed in alphabetical order in the Search for Data call graphs dropdown - by default the first in the list is displayed in the view. The number in square brackets indicates the number of Data call graphs that are available. If there are none, the option will be deactivated.

Filtering the list of available data call graphs

Sometimes the list of data call graphs is very large and it can therefore be difficult to locate the item you need. If this is the case, you can use the filter option to reduce the list:

This opens a set of filtering options - you can use any of these options in isolation, a combination, or all of them. Click Reset to clear any changes you have made, or Done to apply the filtering settings.

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InputFilter the available items based on the item's entry point. Choose an entry point from the list - only items that include the chosen entry point will be made available.
Link types

Filter the available items based on the link type used:


Filter the available items with or without an end point. By default, the filtering is applied to WITH items: this means that only transactions WITH an end-point are displayed by default.

You can alternatively (or in addition) choose an end point from the drop down list - only items that include the chosen end point will be made available.

Result list

The result list displays all items that match the filter applied in the left hand panel. If there are still too many items even after applying the filter, you can search the results using the Search bar at the top:

In addition, you can further refine the search options if required, using the icon highlighted below:

Case sensitivity

Enable/disables case sensitive search (disabled by default). This applies to text strings entered in the search field.

Search by positionSelect as appropriate to specify where in the string the match should occur. By default this is set to Start.

Note that it is possible to set a custom default setting for these two options via the Advanced Search Configuration options in Configuring display preferences.

You can also sort on Name (by default the items are sorted in alphabetical ascending order) and No. of Objects (number of objects refers to the total number of objects in the Reduced Call Graph (not the Full Call Graph)):

For example, to filter items where the entry point object type is a "Java Class", select the item, click Done and the right hand panel will update with the list of items that match your filter:

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Finally select the item you wish to investigate and it will be displayed in the view.

Perspective selection

By default, the perspective (how the data is displayed) will be set to CAST Taxonomy (the default layout configured by CAST Imaging and the only layout available) and Level 4 - you can find out more about the Perspective options in User Guide - GUI.

Navigation flow


Levels 4, 5 and Objects are available for selection when CAST Taxonomy aggregation is selected in the Investigate panel - these levels provide ever greater details about the items within the selected layer:


Double click on nodeLevel 4N/A
Level 5

Drill down to Vignette mode i.e.:  Objects level + drill mode Children + Caller/Callee + Group by communities (depending on the object selected). See also User Guide - GUI for more information on Drill and Communities modes.

Click to expand

Vignette modeExpand and investigate the selected object.
ObjectsView source code of the object. See User Guide - Viewing source code.
Right click on node

Level 4

Level 5

Objects and Vignette mode

  • Add callers/callees > Retrieves all caller/called objects. Links are added to the selected object and to any other objects present where a link exists. The number in square brackets in the contextual menu indicates the number of items available.
  • Add linked objects > See User Guide - Using the Add linked objects feature for more information.
  • Add 2 levels of Callers/Callees > Same principal as the Add Callers/Callees options, but instead displays two levels of objects.
  • Associate to custom aggregation > See User Guide - Creating a custom aggregation mode.
  • Show source code > See See User Guide - Viewing source code.
  • Hide node/object > Use this to hide selected nodes. To unhide, either use the "Undo" option or refresh the page. It is not possible to hide a concept node or a group node, in which case the option will not be available.
  • Remove object > Use this option to remove the object from the current view. When you reload the view the object will be re-displayed.
  • Properties > Displays information about the object in the right hand slide in panel (see User Guide - Properties panel):

Single click on edgeLevels 4 and 5N/A
Objects and Vignette mode
Displays all the methods that are linked between classes and provides additional actions such as:
  • view source code
  • method information
  • add caller/callees

See User Guide - Using the Method view for more information.

Double click on edgeLevels 4 and 5, Objects and Vignette


Call graph start and end points (input/output) - Critical Path

Call graph start (input) and end (output) points are highlighted in the view at Objects level, if they exist. This is known as the Critical Path:


The Critical Path feature is controlled by the icon in the left panel - it is enabled by default:

Note that if no critical path exists, a message is displayed in the bottom right corner:

Huge Data Call Graph, content is filtered

You may see the following message when looking through the list of available transactions:

This indicates that during the data export/import process, the tool identified that the transaction contained more than 10,000 objects, and therefore stopped the processing action for this specific data call graph. In other words, the detail of this data call graph has not been exported and is therefore unavailable.

It is possible to modify the threshold (default 10,000 objects) at which the CAST Imaging exporter tool will consider that a data call graph is "huge" - see Configuring huge transaction or data call graph threshold.

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