Console

The Jjodel Console is a built-in tool for interacting programmatically with your models and metamodels. It allows you to execute expressions, query model elements, test constraints, and debug viewpoint configurations.

Accessing the Console

The Console is available from the bottom panel of the workspace. Click on the Console tab to open it.

What You Can Do

The Console supports:

• Querying model elements — retrieve instances, navigate references, inspect attribute values
• Evaluating expressions — test JjEL (Jjodel Expression Language) and JavaScript expressions against the current model
• Debugging viewpoints — check which views apply to specific elements and why
• Inspecting the JjOM — explore the Jjodel Object Model at runtime
• Viewing logs — see errors, warnings, and informational messages generated during editing

Example Expressions

// Get all instances of class "Person"
Person.allInstances

// Access an attribute
Person.allInstances[0].name

// Navigate a reference
Person.allInstances[0].address.street

// Count elements
Class.allInstances.length

Log Messages

The Console also serves as a log viewer, displaying messages generated by:

• Validation rules (errors, warnings, info)
• Event handlers
• System operations (save, load, synchronization)

Log entries are timestamped and color-coded by severity.

Tip

Use the Console to experiment with JjEL expressions before embedding them in viewpoint templates or validation rules. It provides immediate feedback and helps you verify your logic.