com.kenshoo.pl.entity.internal.validators.RequiredFieldValidationAdapter Maven / Gradle / Ivy

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A Java persistence layer based on JOOQ for high performance and business flow support.

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package com.kenshoo.pl.entity.internal.validators;

import com.google.common.collect.ImmutableMap;
import com.kenshoo.pl.entity.*;
import com.kenshoo.pl.entity.spi.RequiredFieldValidator;

import java.util.stream.Stream;

public class RequiredFieldValidationAdapter, T> implements ChangeValidatorAdapter {

    private final RequiredFieldValidator validator;

    public RequiredFieldValidationAdapter(RequiredFieldValidator validator) {
        this.validator = validator;
    }

    @Override
    public ValidationTrigger trigger() {
        return entityFields -> true;
    }

    @Override
    public SupportedChangeOperation getSupportedChangeOperation() {
        return SupportedChangeOperation.CREATE;
    }

    @Override
    public Stream> fieldsToFetch() {
        return validator.fetchFields();
    }

    @Override
    public ValidationError validate(EntityChange entityChange, CurrentEntityState currentState,  FinalEntityState finalState) {
        if (isFieldNotSpecified(entityChange) && validator.requireWhen().test(finalState)) {
            return new ValidationError(validator.getErrorCode(), validator.requiredField(), ImmutableMap.of("field", validator.requiredField().toString()));
        }
        return null;
    }

    private boolean isFieldNotSpecified(EntityChange entityChange) {
        return  entityChange.safeGet(validator.requiredField()).isNullOrAbsent();
    }
}