import groovy.util.XmlSlurper

class Person {
    String firstName, lastName
}

class Policy {
    String policyNo
}

class Search {

    def search(Person person) {
        //some implementation
        println "Searching for Person: $person.firstName $person.lastName"
    }

    def search(Policy policy, Person person) {
        //some implementation
        println "Searching for Person and Policy: $person.firstName $person.lastName $policy.policyNo"
    }

    def search(Person person, Policy policy) {
        //some implementation
        println "Searching for Person and Policy: $person.firstName $person.lastName $policy.policyNo"
    }
}

//search with Person only
def payloadString1 = '<message><header><criteria><type>Person</type><key>firstName</key><value>RJ</value></criteria><criteria><type>Person</type><key>lastName</key><value>Salicco</value></criteria></header></message>'
//search with Policy and Person
def payloadString2 = '<message><header><criteria><type>Policy</type><key>policyNo</key><value>123456789</value></criteria><criteria><type>Person</type><key>firstName</key><value>RJ</value></criteria><criteria><type>Person</type><key>lastName</key><value>Salicco</value></criteria></header></message>'
//search with Person and Policy
def payloadString3 = '<message><header><criteria><type>Person</type><key>firstName</key><value>Jim</value></criteria><criteria><type>Person</type><key>lastName</key><value>Bob</value></criteria><criteria><type>Policy</type><key>policyNo</key><value>987654321</value></criteria></header></message>'

def result1 = new XmlSlurper().parseText(payloadString1)
def result2 = new XmlSlurper().parseText(payloadString2)
def result3 = new XmlSlurper().parseText(payloadString3)

def handleResult(result) {
    def objectMap = [:]
    result.header.criteria.each {
        def existing = objectMap.get(it.type.text())
        if(existing) {
            existing.put(it.key.text(), it.value.text())
        } else {
            objectMap.put(it.type.text(), [(it.key.text()):(it.value.text())])
        }
    }
    objectMap
}

def createObjectList(objectMap) {
    def objectList = []
    objectMap.each {
        def clazz = this.class.classLoader.loadClass("$it.key")
        objectList.add(clazz.newInstance(it.value))
    }
    objectList
}

def objectList1 = createObjectList(handleResult(result1))
def objectList2 = createObjectList(handleResult(result2))
def objectList3 = createObjectList(handleResult(result3))

new Search().search(objectList1)
new Search().search(objectList2)
new Search().search(objectList3)