Deep copy Map in Groovy

groovy deep-copy
Ayman picture Ayman · Oct 31, 2012 · Viewed 27k times · Source

How can I deep copy a map of maps in Groovy? The map keys are Strings or Ints. The values are Strings, Primitive Objects or other maps, in a recursive way.

Answer

Ayman picture Ayman · Oct 31, 2012

An easy way is this:

// standard deep copy implementation
def deepcopy(orig) {
     bos = new ByteArrayOutputStream()
     oos = new ObjectOutputStream(bos)
     oos.writeObject(orig); oos.flush()
     bin = new ByteArrayInputStream(bos.toByteArray())
     ois = new ObjectInputStream(bin)
     return ois.readObject()
}

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