Evaluate function

gistfile1.txt

def evaluate(c) {
  switch (c.model.name) {
  case 'Or':
    for (c2 in c.clauses) {
      if (evaluate(c2)) {
        return true
      }
    }
    return false
  case 'And':
    for (c2 in c.clauses) {
      if (!evaluate(c2)) {
        return false
      }
    }
    return true
  case 'Nand':
    for (c2 in c.clauses) {
      if (!evaluate(c2)) {
        return true
      }
    }
    return false
  case 'Log_Match':
    return build.log.find(c.regex)
  case 'File_Presence':
    return build.workspace.child(c.file).exists()
  }
  assert false : c
}
result=evaluate(condition)