CODEWITHSUNDEEP
javajava-5
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Reputation: 1

filtering out the list data if the attributes are null itself

I have the below class named BrokerInvoice which contain the following member variables

public class BrokerInvoice
{
private  List<BrokerInvoiceLineItem> lineItems;

//and its corresponding setters and getters 

}

I have the below java class named BrokerInvoiceLineItem as shown below which has a relationship among the top class named brokerInvoice as the below class is added in the to class as a list

public class BrokerInvoiceLineItem {

    private String brokerRefId;
    private double notional;
    private Date dealDate;


    //corresponding setters and getters

    }

now in some piece of code i am getting the object of parent class that is of broker invoice itself

 BrokerInvoice  brokerInvoice1 = abc.findrty( brokerIdLong , serType );

now the above brokerInvoice1 object contain the entries of lineItems that is of type BrokerInvoiceLineItem also , so i want to edit the list named lineitems such that the list i am getting inside the brokerInvoice1 object as the condition is that there should be a sort of pre check that if lineitems list attributes named brokerRefId,notional,dealDate,dealDate are null then that entry should not be there in the line items list itself

so please advise how can i filter out my lineitems list residing inside brokerInvoice1 object such that there should not be no null attribute entry inside the lineitemslist if these attribute are empty

I am using Java 5 please advise how to achieve this can I achieve the same by java5

Upvotes: 0

Views: 644

Answers (2)

Pankaj Singhal
Pankaj Singhal

Reputation: 16053

Java 5 : 

private  List<BrokerInvoiceLineItem> newLineItems = new ArrayList<BrokerInvoiceLineItem>();


if (brokerInvoice1 != null && brokerInvoice1.lineItems != null){
for(BrokerInvoiceLineItem brokerInvoiceLineItem : brokerInvoice1.lineItems){
    if(brokerInvoiceLineItem.getBrokerRefId() != null && brokerInvoiceLineItem.getDealDate() == null){
        newLineItems.add(brokerInvoiceLineItem)
    }
}

}

Upvotes: 0

Krzysztof Krasoń
Krzysztof Krasoń

Reputation: 27486

If you are on Java 8 you can use removeIf from Collection:

listItems.removeIf(i -> i.getBrokerRefId() == null || i.getDealDate() == null);

This assuming you want to mutate the list. If you prefer to not change the listItems, and only get a new list without the wrong items, you can use stream filtering:

List<BrokerInvoiceLineItem> newList = listItems.stream()
    .filter(i -> i.getBrokerRefId() != null)
    .filter(i -> i.getDealDate() != null)
    .collect(Collector.toList());

Notice, that the stream version retains items that match the predicate and the removeIf one does the opposite, so the predicates are inverted.

Upvotes: 1

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