convert map to xml

map2xml.groovy

def kvmap = [
  key1: "value1",
  key2: "value2",
  key3: [
    "key3-1" : "value3-1",
    "key3-2" : "value3-2",
  ],
]

sw = new StringWriter()
new groovy.xml.MarkupBuilder(sw).with {
  doubleQuotes = true
  visitor = { k, v ->
    "$k" { v instanceof Map ? v.collect(visitor) : mkp.yield(v) }
  }
  langs(type: 'current') { kvmap.collect visitor }
}

def expect = '''\
<langs type="current">
  <key1>value1</key1>
  <key2>value2</key2>
  <key3>
    <key3-1>value3-1</key3-1>
    <key3-2>value3-2</key3-2>
  </key3>
</langs>'''

assert sw.toString() == expect

collectはeachでも良い(3文字短縮)。つーかgrepでもfindAllでも良い。