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POIntelligent search and generation of Java code, preferrably using Python?
 

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  1. POIntelligent search and generation of Java code, preferrably using Python?
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    <p>Basically, I do lots of one-off code generation, large-scale refactorings, etc. etc. in Java.</p> <p>My tool language of choice is Python, but I'll take whatever solutions you can offer.</p> <hr> <p>Here is a <em>simplified</em> illustration of what I would like, in a pseudocode</p> <p><strong>Generating an implementation for an interface</strong></p> <pre><code>search within my project: for each Interface as iName: write class(name=iName+"Impl", implements=iName) search within the body of iName: for each Method as mName: write method(name=mName, body="// TODO implement this...") </code></pre> <p>Basically, the tool I'm searching for would allow me to:</p> <ul> <li>parse files according to their Java structure ("search for interfaces")</li> <li>search for words contextualized by language elements and types ("variables of type SomeClass", "doStuff() method calls on SomeClass instances")</li> <li>to run searches with structural context ("within the body of the current result")</li> <li>easily replace or generate code (with helpers to generate, as above, or functions for replacing, "rename the interface to Foo", "insert the line Blah.Blah()", etc.)</li> </ul> <p>The point is, I don't want to spend a lot of time writing these things, as they are usually throwaway. But sometimes I need something just a little smarter than what grep offers. It wouldn't be too hard to write up a simplistic version of this, but if I'm going to use something like this at all, I'd expect it to be robust.</p> <p>Any suggestions of a tool/library that will help me accomplish this?</p> <hr> <p><strong>Edit to add some clarification</strong></p> <ol> <li>Python is definitely not necessary; I'll take whatever is that. I merely suggest it incase there are choices.</li> <li>This is to be used in combination with IDE refactoring; sometimes it just doesn't do everything I want.</li> <li>In instances where I'm using for code generation (as above), it's for augmenting the output of other code generators. e.g. a library we use outputs a tonne of interfaces, and we need to make standard implementations of each one to mesh it to our codebase.</li> </ol>
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    1. CO@Ipsquiggle: How big the codebase that needs the "large scale refactoring" and how automated does this needs to be? I've instrumented Java source code (replacing System.out with proper logging) using Bash+sed/awk etc. Regarding an interface an a skeleton implementation: I created IntelliJ IDEA template(s) that automatically creates a factory class, which itself has a private *"xxxImpl"* empty/todo skeleton. For advanced stuff, IntelliJ IDEA is now partly open and has an "Open API" allowing you to access all your .java files' AST. I fear it won't be simple :(
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    2. COSome instances are highly automated (see point 3 in the edits above) and others are basically variations on your example of replacing System.out. I guess I'm a little surprised that no one has made a library or DSL for working with the AST/tokenized code in a high-level way.
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