Flow Viewer

The flow viewer is supported so that completed Java sources can be checked through the GUI. Through this editor, you can intuitively check the source and easily compare the design and implementation deliverables.

The flow viewer is executed as shown in the figure below.

Package Explorer → select the desired Java source → right-click → Open With → click 'Flow Viewer'.

Select Flow Viewer menu

1. Layout

The flow viewer consists of two pages.

Overview page: Shows basic information about the class.
Flow page: Shows the flow and source of the class.

2. Overview

On the overview page, you can check basic class information, member fields, and operation/method information of service/business modules.

Overview page

The overview page consists of the following three parts.

Basic information: You can check the basic information of the created class.
Member fields: You can check the list of member fields that the class has.
Methods: You can check the list of methods that the class has.

2.1. Outline

Provides an outline for the overview page.

Overview page outline

3. Flow page

On the flow page, the flow of the source code executed by the method is displayed.

Flow page

The flow page consists of the following four parts.

Top tabs: Through the Flow/Source tabs, you can check the flowchart and source code for the source.
Top toolbar: Menus for convenience are located at the top of the workspace.
- Show/Hide nodes: Provides the ability to hide specific nodes (if, switch, for, while, do-while, user code area, getBean) in the workspace.
- Export image: You can export the flow created in the workspace as an image.
- Print: You can print the flow created in the workspace and output it as a printout.
- Expand/Collapse all nodes: Provides expand/collapse functionality for all nodes.
- Zoom: You can adjust the zoom level of the workspace view.
Basic information: You can simply check the access modifier, logical name, method name, and input/output types of the method.
Viewer: Depending on the top tab, you can check the flow/source code.

3.1. Nodes

In the flow designer, source code is displayed in units of nodes. The source code must be written in a predefined format so that the flow designer can recognize it and represent it as nodes.

3.1.1. Relationship between nodes and source code

The following table explains the relationship between nodes and source code.

Node image Node name Node description Source code

Node image	Node name	Node description	Source code
	Logical area	Divides source code into logical units. Generally used when grouping other nodes.
	Conditional statement	Node corresponding to if(condition).
	Conditional statement	Node corresponding to switch.
	For loop	Node corresponding to for(initialization;condition;increment).
	For Each loop	Node corresponding to for(parameter : iterator).
	While loop	Node corresponding to while(condition).
	Do While loop	Node corresponding to do{…} while(condition).
	Bean module call	Node that calls a method defined in a bean module.
	DBIO module call	Node that calls a method defined in a DBIO module.
	Service Executor call	Node that calls a service through the provided service Executor.
	Variable declaration	If a variable to be expressed in the flow is required, it can be declared through a variable declaration node.
	Exception monitoring	Node corresponding to try/catch/finally.
	Throw application exception	Node that throws an application exception class.
	Return	Node corresponding to return.
	GetBean	Node corresponding to the code that initializes the object of the member field of the module before the method of the business/DBIO module is called. However, if the member field is defined as `Autowired`, it is not added.
	User code area	All code except the source code listed above is displayed as a user code area.

Logical area

Divides source code into logical units. Generally used when grouping other nodes.

Conditional statement

Node corresponding to if(condition).

Conditional statement

Node corresponding to switch.

For loop

Node corresponding to for(initialization;condition;increment).

For Each loop

Node corresponding to for(parameter : iterator).

While loop

Node corresponding to while(condition).

Do While loop

Node corresponding to do{…} while(condition).

Bean module call

Node that calls a method defined in a bean module.

DBIO module call

Node that calls a method defined in a DBIO module.

Service Executor call

Node that calls a service through the provided service Executor.

Variable declaration

If a variable to be expressed in the flow is required, it can be declared through a variable declaration node.

Exception monitoring

Node corresponding to try/catch/finally.

Throw application exception

Node that throws an application exception class.

Return

Node corresponding to return.

GetBean

Node corresponding to the code that initializes the object of the member field of the module before the method of the business/DBIO module is called. However, if the member field is defined as Autowired, it is not added.