How to revolve full path of a symlink?

In Groovy/Ant, I need to get the actual path that a particular symlink points to. For example, if I have some开发者_开发技巧 symlink foo pointing at /home/documents/bar

foo -> /home/documents/bar

Is there a way to take foo and resolve it to a pathname?

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Until Java 7, can't you use:

println file.canonicalPath

To get the path that the link points to? Where:

println file.absolutePath

Prints the path to the symlink