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use java stream to validate if values ​in a list are found within an enum class

Good afternoon

I have a question, currently I require a method that passes an arrayList of values, it is necessary to compare it with an enum and in case some of the values ​​in the list are not found in the enum, it returns false, this as a validation method, I'm thinking about how to do it, I would like to do it via stream but I can't think of any ideas.

My ArrayList is like the following:

List<String> listOfService = new ArrayList<>(Arrays.asList("mobile_postpaid", "mobile_internet", "sam"));

My EnumClass

package org.tmve.customer.ms.beans.response;
import lombok.Getter;
@Getter
public enum Service {

    MOBILE_PREPAID("mobile_prepaid"), MOBILE_POSTPAID("mobile_postpaid"), VALUE_ADDED_SERVICE("value_added_service"), MOBILE_INTERNET("mobile_internet"), DTH("dth"), LANDLINE("landline"), AUTHENTICATION("authentication");

    private String value;

    Service(String value) {
        this.value = value;
    }
}

As we can see in ListOfService comes the value of sam, which is not within the ENUM, so I would like a comparison method and in this case where sam is not found within the values ​​of enum Service, return false

Solution

  • You can either add a method to your enum

    public List<String> getValues() {
    return values().map(service -> service.value);
}

    And then use allMatch like this

    boolean b = listOfService.stream()
    .allMatch(service -> Service.getValues().contains(service))

    see allMatch doc

    You can probably optimize the enum method by storing the list or using another comparison