Eclipse Community Forums: Java Development Tools (JDT)

Help

Home

Home » Language IDEs » Java Development Tools (JDT) » How to manipulate the AST?

Show: Today's Messages :: Show Polls :: Message Navigator

How to manipulate the AST? [message #798475]

Tue, 14 February 2012 18:42

b x

Messages: 16
Registered: February 2012

Junior Member

hi,
I am working on AST, and now I want to modify an AST and store these modifications back into Java source code.
Do you know how to do it, like creating a new AST node?

Report message to a moderator

Re: How to manipulate the AST? [message #798549 is a reply to message #798475]

Tue, 14 February 2012 20:43

Olivier Thomann

Messages: 518
Registered: July 2009

Senior Member

Check the documentation of the class org.eclipse.jdt.core.dom.rewrite.ASTRewrite. To create new nodes, check the class org.eclipse.jdt.core.dom.AST.

HTH,

Olivier

Report message to a moderator

Re: How to manipulate the AST? [message #798919 is a reply to message #798549]

Wed, 15 February 2012 08:22

Satyam Kandula

Messages: 444
Registered: July 2009

Senior Member

http://www.eclipse.org/articles/article.php?file=Article-JavaCodeManipulation_AST/index.html could also help you.

Report message to a moderator

Re: How to manipulate the AST? [message #800039 is a reply to message #798475]

Thu, 16 February 2012 16:07

b x

Messages: 16
Registered: February 2012

Junior Member

Thank you, and now I want to create an assignment node, so first I should write like "Assignment a = ast.newAssignment()", then what else should I do?

Report message to a moderator

Re: How to manipulate the AST? [message #800207 is a reply to message #800039]

Thu, 16 February 2012 20:38

Joey Zhu

Messages: 7
Registered: February 2012

Junior Member

There are various types of nodes in AST tree. There is an ASTViewer eclipse plugin, which would be very very helpful for you to understand what kinds of nodes included in a java source file.

Report message to a moderator

Re: How to manipulate the AST? [message #811843 is a reply to message #800207]

Fri, 02 March 2012 22:24

b x

Messages: 16
Registered: February 2012

Junior Member

now I am going to create a java file and store the modifications back into that file, I used ITextFileBufferManager bufferManager = FileBuffers.getTextFileBufferManager() to get the buffer manager, but when I executed it, I got an ExceptionInInitializerError, could you tell me how to solve it?

Report message to a moderator

Re: How to manipulate the AST? [message #811913 is a reply to message #811843]

Sat, 03 March 2012 00:47

Olivier Thomann

Messages: 518
Registered: July 2009

Senior Member

It would help to get a stack trace for the ExceptionInInitializerError.
--
Olivier

Report message to a moderator

Re: How to manipulate the AST? [message #813937 is a reply to message #798475]

Mon, 05 March 2012 21:36

b x

Messages: 16
Registered: February 2012

Junior Member

Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.IllegalStateException: Workspace is closed.
at org.eclipse.core.resources.ResourcesPlugin.getWorkspace(ResourcesPlugin.java:399)
at org.eclipse.core.filebuffers.FileBuffers.<clinit>(FileBuffers.java:52)
... 1 more
how to solve the exception here?

Report message to a moderator

Re: How to manipulate the AST? [message #814334 is a reply to message #813937]

Tue, 06 March 2012 10:21

Satyam Kandula

Messages: 444
Registered: July 2009

Senior Member

As from the error, the workspace seems to be closed. What is your application - Is it a normal Java application or an Eclipse plugin? May be http://www.eclipsezone.com/eclipse/forums/t74795.html could help.

Report message to a moderator

Re: How to manipulate the AST? [message #814473 is a reply to message #814334]

Tue, 06 March 2012 13:48

Harutyun Arzumanian

Messages: 35
Registered: February 2012

Member

If it's a plugin, then you should code it like a plugin and not through a main method java legacy, you need to have a file in your root: plugin.xml which will hold your plugin configuration. your action class must implement