Java Magazine, Nov/Dec 2017
ORACLE COM JAVAMAGAZINE NOVEMBER DECEMBER 2017 51 java ee 8 public void findByCustomer PoolCustomer customer Stream Job jobList em createQuery select object o from Job o where o customer customer getResultStream jobList map j j getCustomerId getCustomerId getCustomerId ordered job j getId Starting j getWorkDate forEach jm System out println jm This method can be modified slightly to return a list of results by using the Collectors toList utility method as follows public List Job findByCustomer PoolCustomer customer Stream Job jobList em createQuery select object o from Job o where o customerId customer setParameter customer customer getResultStream return jobList collect Collectors toList In the next scenario shown below I find a List of jobs that pertain to pools of a particular shape In this instance I return all jobs that match the shape passed in as a string Similar to the first example I first return a stream of Job records Next I filter the records based on the customers pool shape As can be seen the resulting code is concise and very easy to read public List Job findByCustPoolShape
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