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README
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README
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==============================================
NOTES FOR SWT IMPLEMENTATION OF THE GUI RIPPER
==============================================
1.) Modifications made to the GUIRipper-Core project:
i.) edu.umd.cs.guitar.ripper.GRipperMonitor.java
- added protected modifier to getClosedWindowCache() method
- added protected modifier to isExpandable() method
2.) Running and Debugging the SWT GUI Ripper
Prerequisite: Your execution environment must be 32-bit. The SWT library that we provide is for 32-bit systems,
and the ripping process will fail if attempting to run on a 64-bit system. If you only
have a 64-bit system, we suggest downloading the free "VirtualBox" virtualization software
from Oracle Corporation and installing a 32-bit Linux based operating system, such as
Kubuntu, as a virtual machine. This will allow you to run 32-bit applications on a 64-bit machine.
a.) Importing the SWT GUI Ripper projects
1.) Assume that your clone of the swtripper projects exists in ~/swtripper
2.) Download and launch Eclipse (we used Eclipse 3.6.0 for Java developers) with a fresh workspace
3.) Go to "File" -> "Import" -> "General" -> "Existing Projects into Workspace" -> "Next"
4.) Under "Select root directory" in the import projects wizard, select "Browse..."
5.) Browse to the location of your clone (i.e. ~/swtripper)
6.) Select a folder directly underneath the clone that you have not yet imported (e.g. GUITARModel-Core)
7.) Click "OK" in the Browse window and then click "Finish" in the import wizard
8.) Repeat steps a.3 to a.7 for each of the 4 projects in the clone
b.) Running the provided examples of GUI Ripping SWT Snippets
1.) Go to "Run" -> "Run Configurations...". Underneath the "Java Application" category, You should see 4 provided
configurations named "Run_snippet#(description)", which run the standalone GUIs, and also 4 provided configurations
named "Rip_snippet#(description)", which run the ripping process on those GUIs.
2.) Select the "Rip" configuration to run, then click "Run"
3.) You should see a new GUI appear briefly, and the ripping process will proceed and dump its output to the Eclipse
console view. Additionally, after the ripping is finished, you should see 3 new files under the "GUIRipper-Plugin-SWT"
project (if not, then right click the project in the Package Explorer and select "Refresh"). These files will be
"log_widget.xml", "Snippet#.GUI.xml" and "Snippet#.log", similar to the original JFC ripper project.
c.) Debugging the provided examples of GUI Ripping SWT Snippets
1.) Go to "Debug" -> "Debug Configurations...". You should see 4 provided configurations named "Rip_snippet#(description)"
2.) Select the configuration to debug, then click "Debug"
3.) You should be prompted to switch to the Debug perspective, and the application should break in the main method of SWTRipperMain.
4.) Add breakpoints as desired throughout the code to debug the execution through the projects
d.) Running the SWT GUI Ripper on new examples
1.) Copy the new code into a new source folder underneath the "GUIRipper-Plugin-SWT" project. (e.g. snippets)
2.) Go to "Run" -> "Run Configurations..." and select an existing SWT GUI Ripper launch configuration.
3.) In the top left of the window, click the button with tooltip "Duplicates the currently selected launch configuration"
4.) Modify the new launch configuration as necessary in order to run with your new code
5.) Repeat steps 2.b.1 to 2.b.3
NOTES:
- Please note that much of the code of our project was templated (copied) from the original JFC Ripper project so that it would
be compatible with the existing GUITAR system. Therefore, some of the overridden functions do not have documentation since we
only focused on implementing the crucial methods that would enable GUI ripping for SWT.
Addendum:
The following is a description of our methodology and philosophy used to produce the SWTRipper plug-in for GUIRipper. We are providing
this information such that anyone who wishes to improve upon or extend our plug-in can do so with a deeper understanding of why the
code is structured the way it is, and further to point out some areas in which we knowingly chose to make what we consider to be
bad decisions architecturally speaking in order to adhere to the philosophy we outlined.
Methodology:
After reading through the GUIRipper source, most importantly the JFCRipper plug-in, we used the following methodolgy to arrive at
our final working SWTRipper plug-in.
1.) Copy all of the code from JFCRipper into a new plug-in called SWTRipper.
2.) Download, compile, and attempt to rip SWT snippets using our SWTRipper code. (a copy of JFCRipper at this point)
3.) As the plug-in failed, either behaviorally incorrect or crashed, debug the same SWT snippet to find where the crash
occurred.
4.) Reason about why the behavior was incorrect or why the crash occurred at that point and come up with a set of potential
fixes.
5.) Order the fixes according to our chosen philosophy and then apply the most desirable fix.
6.) If the fix worked, repeat the above process until a new problem occurred or the snippet is ripped successfully.
7.) Move on to a new snippet or example to test some aspect of the SWT library which has not yet been tested.
The result of this process resulted in a working SWTRipper plug-in for GUIRipper, but most of the code is largely a direct copy of
the JFCRipper plug-in with 'JFC' changed to 'SWT'. That is not to say that the process was not long and sometimes arduous, but
simply that it highlights several deficiencies within the current architecture. Most notable among those is the considerable
amounts of code duplication. See the next section on our applied philosophy as to why we did not work to address these issues.
Philosophy:
Our philosophy was simple: achieve a working SWTRipper plug-in which integrates as cleanly and seamlessly as possible into the
existing open-source GUIRipper project.
Given that our end goal was to integrate our code into an existing open-source project which we had nothing to do with prior to
our project, we wanted to make that integration have the smallest possible footprint such that the authors of the open-source
project would not only be more likely to want to integrate our code, but have an easy time doing so. Both of these properties
would drastically increase the probability of our code being accepted.
With that in mind, when we needed to change the way the existing plug-in or core application worked, we sought out whichever
change made the fewest modifications to existing source code. We nearly completed the entire SWTRipper plug-in without a single
change to the GUIRipper core. The only changes we had no choice but to make are documented at the top of this readme, and without
them, our code could not have overridden the necessary functions in the superclass due to their not being visible to our class.
Drawbacks:
At the time of implementing the SWTRipper plug-in, we were well aware of many places in which the desirable design was to extract
common code out of JFCRipper and put it into either a concrete superclass (The current superclass of JFC* and SWT* is G*, and all
core G* classes are abstract.) or a shared library. Either of these approaches would have promoted code reuse over code duplication
and made future maintenance and extensions significantly easier. As s side-note, another suggested fix was to have the SWT plug-in
extend the JFC plug-in where code reuse was possible, thus avoiding the undesirable duplication. However, this fix is generally
just messy and unintuitive in that two independent plug-ins now have explicit dependencies.