groovydeep-copy

Deep copy Map in Groovy

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.

Solution

  • 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()
}