Table of contents

1. JSON object to map
2. Switch Statement
   1. Use class in case
3. deconstruct return
   1. example 1
   2. example 2
4. GISTs
   1. Use Comparator
   2. Re-group and spread map into new map
   3. HTTP Builder get binary stream
   4. Use HTTP builder to add attachment to an email from an S3 bucket

---

JSON object to map

import com.fasterxml.jackson.databind.ObjectMapper

HashMap<String, Object> returnVal = new ObjectMapper().readValue(response.json.toString(), HashMap.class)

def slurper = new groovy.json.JsonSlurper()
Map<String, Object> result = slurper.parseText(ftpJSONBody) as Map<String, Object>

def paramMap = new grails.web.servlet.mvc.GrailsParameterMap(result, request)
def cmdObj = new IntegrationCommand(paramMap) as JSON
HashMap<String, Object> expected = new ObjectMapper().readValue(cmdObj.toString(), HashMap.class)

expected

Switch Statement

Use class in case

 switch (ug) {
    case GroupCompare:
        comparedGroupIds = ((GroupCompare) ug)?.userGroupJoinGroupCompare*.userGroup.id
        if (!comparedGroupIds || comparedGroupIds?.size() == 0) comparedGroupIds = null
        comparedAssessmentOrderIds = ((GroupCompare) ug)?.groupAssessmentOrders*.assessmentOrderId
        break

    case ResultCompare:
        comparedGroupIds = ((ResultCompare) ug)?.groupCompareJoinUserGroup?.userGroupId ? [((ResultCompare) ug)?.groupCompareJoinUserGroup?.userGroupId] : null
        comparedAssessmentOrderIds = ((ResultCompare) ug)?.groupAssessmentOrders*.assessmentOrderId
        break

    case UserGroup:
        DetachedCriteria<GroupCompare> groupCompareCriteria = findCompareGroupsByGroupCriteria(ug)
        groupCompareCriteria.projections { property('id') }
        comparedGroupIds = groupCompareCriteria.list()
        break

    default:
        break
}

deconstruct return

example 1

def fetchGroupAndAssessmentIds
{ var ->
    def comparedGroupIds, comparedAssessmentOrderIds

    return [comparedGroupIds, comparedAssessmentOrderIds]
}

def (comparedGroupIds, comparedAssessmentOrderIds) = fetchGroupAndAssessmentIds(ug)

example 2

def fetchGroupAndAssessmentIds =
        { var ->
            def comparedGroupIds, comparedAssessmentOrderIds

            return [[returnRGList: returnRGList], [unmatchedGroups: unmatchedGroups], [duplicates: duplicates], [requestedAdminGroups: requestedAdminGroups], [originalValueMap: originalValueMap]]
        }

def (roleGroupList, unmatchedGroups, duplicates, requestedAdminGroups, originalValueMap) = fetchGroupAndAssessmentIds(roleGroups)

---

GISTs

Use Comparator

comparator for 2 merged lists

Re-group and spread map into new map

create new map by conditions

HTTP Builder get binary stream

bin stream

Use HTTP builder to add attachment to an email from an S3 bucket

http builder