JQuery finding your way through scattered code

JQuery: How it worksIncrementally perform the exploration by extending each view with a sub-view 1.. JQuery: How it worksIncrementally perform the exploration by extending views with a

Typical ways to explore scattered concerns:

Browse structural views

- package structures, inheritance hierarchy

Search for a specific pattern

JQuery: How it works

Avoiding loss of context:

Problem: Too many browsers leads to loss of

context

Solution: Support many views within a single

Start with Package

JQuery: How it works

Abstract Class Browser

Both views in same window

Package Browser

Bundled with many more browsers

JQuery: How it works

Incrementally perform the exploration by

extending each view with a sub-view

1 Select extension point

JQuery: How it works

Incrementally perform the exploration by

extending views with a new extensions

1 Select

extension point

2 Choose

sub-query

JQuery: How it works

Incrementally perform the exploration by

extending views with a new extensions

JQuery: How it works

Filtering by regular expression

Search for “Figure”:

• Open query dialog

• double-click

JQuery: How it works

Filtering by regular expression

Search for “Figure”:

• Open query dialog

• Edit query

JQuery: How it works

Filtering by regular expression

Search for “Figure”:

• Open query dialog

• Edit query

• Close dialogue

(query automatically re- executes)

JQuery: How it works

Filtering by regular expression

Browser is now filtered by “Figure”

Can customize queries

in many other ways too.

JQuery: An Example

Make a enhancement to the JHotDraw codebase

Non-trivial, but some details abstracted away.

Based on an actual task we performed with little prior

knowledge of the codebase.

Task:

JQuery: The Plan

???

Frame No Frame

Menu Change

Pen Color

JQuery: Executing the Plan

Menu Change

Pen Color

Frame No Frame

Change Attribute Command

Found by regex search for

Step 2: Find

relationship

to frames

JQuery: Executing the Plan

Change Attribute Command

???

Frame No Frame

Determined that Pen

Color sets Menu

Attribute Figure

setAttr

implemented by

JQuery: Executing the Plan

Change Attribute Command

JQuery: Executing the Plan

Change Attribute Command

Rectangle Figure

Text Figure

change this

method

Figure

Attribute Figure getAttr

drawFrsetAttrsetAttr

implemented by calls

dataflow sidetrack to explore

FigureAttributes

Determined that Pen

Color sets

FrameColor Attribute

JQuery: Versatile Code Navigator

1 Browsing structural views

2 Searching for a specific pattern

3 Following relationships

Current IDE’s:

“explosion” of disconnected views

loss of context disorientation

JQuery:

within a single navigation view

retain context reduce disorientation

Browse Scattered Code

JQuery: Customization

JQuery can do more:

can create more powerful queries

can include data from other tools

has extendable menu items

virtual source files (in next release)

See our website!

JQuery: De-tangling searching

Why use 4 browsers when you can use 1?

Google:

Download JQuery (new release out soon):

Prevents tangled and scattered