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Java : Import a class programmatically [message #1702517]

Wed, 22 July 2015 19:48

Viktor Py

Messages: 1
Registered: July 2015

Junior Member

I have a CompilationUnit that contains a class where a reference to another class is not imported. Eclipse resolves that kind of issue easily and proposes to import the missing class (which is located in the parent package).

How can I import a missing class programmatically without knowing its name or location ?

Reflection, injection, ClassLoader and other runtime mechanisms are not the right choice as I'm processing the classes statically through the Eclipse JDT API. Please, I'm just looking for a static oriented solution.
FYI : this how we list the imports from a CompilationUnit :

List<ImportDeclaration> existingImports = aCompilationUnit.imports();

The problem is that I don't know how to generate missing ImportDeclaration.

Thanks.

[Updated on: Wed, 22 July 2015 20:07]

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Re: Java : Import a class programmatically [message #1702525 is a reply to message #1702517]

Wed, 22 July 2015 22:28

Stephan Herrmann

Messages: 1853
Registered: July 2009

Senior Member

For manipulating the imports of a Java file please see class org.eclipse.jdt.core.dom.rewrite.ImportRewrite: the javadoc outlines its usage.
If all you have is an unresolvable simple name, utilities like ASTResolving.guessBindingForTypeReference(node) come in handy.
If that doesn't work for you, you may have to use the org.eclipse.jdt.core.search.SearchEngine and somehow cope with potentially many matches for a given simple name.

HTH,
Stephan

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