org.hglteam.validation.MultistepValidationBuilderBase Maven / Gradle / Ivy

Go to download
package org.hglteam.validation;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;

public abstract class MultistepValidationBuilderBase> {
    protected final List> validations;

    protected MultistepValidationBuilderBase() {
        validations = new ArrayList<>();
    }

    public ValidationStepBuilder when(Predicate predicate) {
        return new ValidationStepBuilder(predicate);
    }

    public  B onProperty(Function getter, Consumer> builderConfigurator) {
        this.validations.add(this.propertyValidator(getter, builderConfigurator));
        return self();
    }

    protected 
 Validation propertyValidator(Function getter, Consumer> builderConfigurator) {
        return t -> {
            var value = getter.apply(t);
            var builder = Validation.builder();

            builderConfigurator.accept(builder);

            builder.validate(value);
        };
    }

    protected abstract B self();

    public class ValidationStepBuilder {
        private Predicate predicate;

        private ValidationStepBuilder(Predicate condition) {
            this.predicate = condition;
        }

        public ValidationStepBuilder and(Predicate condition) {
            this.predicate = this.predicate.and(condition);
            return this;
        }

        public ValidationStepBuilder or(Predicate condition) {
            this.predicate = this.predicate.or(condition);
            return this;
        }

        public B then(Function exceptionFunction) {
            MultistepValidationBuilderBase.this
                    .validations
                    .add(SimpleValidation.builder()
                            .predicate(this.predicate)
                            .exceptionFunction(exceptionFunction)
                            .build());
            return MultistepValidationBuilderBase.this.self();
        }
    }
}