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An AssertJ extension for Bean-Validation
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package com.github.jinahya.assertj.validation;

/*-
 * #%L
 * assertj-bean-validation
 * %%
 * Copyright (C) 2021 - 2022 Jinahya, Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import org.assertj.core.api.AbstractAssert;
import org.assertj.core.api.AbstractClassAssert;
import org.assertj.core.api.AbstractObjectArrayAssert;
import org.assertj.core.api.Assert;
import org.assertj.core.api.AssertFactory;
import org.assertj.core.api.ObjectAssertFactory;

import javax.validation.ConstraintViolation;
import javax.validation.Path;
import javax.validation.metadata.ConstraintDescriptor;
import java.util.Objects;
import java.util.function.Function;

/**
 * An abstract assertion class for verifying {@link ConstraintViolation} values.
 *
 * @param    self type parameter
 * @param  actual type parameter
 * @param       root bean type parameter
 */
public abstract class AbstractConstraintViolationAssert<
        SELF extends AbstractConstraintViolationAssert, ACTUAL extends ConstraintViolation, T>
        extends AbstractValidationAssert
        implements ConstraintViolationAssert {

    /**
     * Creates a new instance with specified arguments.
     *
     * @param actual   an actual value to verify.
     * @param selfType self type.
     */
    protected AbstractConstraintViolationAssert(final ACTUAL actual, final Class selfType) {
        super(actual, selfType);
    }

    // -------------------------------------------------------------------------------------------- constraintDescriptor
    @Override
    public , A extends AbstractConstraintDescriptorAssert>
    A extractingConstraintDescriptor(
            final Function descriptorExtractor,
            final AssertFactory assertFactory) {
        return isNotNull().extracting(descriptorExtractor, assertFactory);
    }

    // -------------------------------------------------------------------------------------------- executableParameters
    @Override
    public , E> A extractingExecutableParameters(
            final Function parametersExtractor,
            final AssertFactory assertFactory) {
        return isNotNull()
                .extracting(parametersExtractor, assertFactory);
    }

    // ------------------------------------------------------------------------------------------- executableReturnValue
    @Override
    public > A extractingExecutableReturnValue(
            final Function valueExtractor,
            final AssertFactory assertFactory) {
        return isNotNull().extracting(valueExtractor, assertFactory);
    }

    // ---------------------------------------------------------------------------------------------------- invalidValue
    @Override
    public > A extractingInvalidValue(
            final Function valueExtractor,
            final AssertFactory assertFactory) {
        return isNotNull()
                .extracting(valueExtractor, assertFactory);
    }

    // -------------------------------------------------------------------------------------------------------- leafBean

    @Override
    public > A extractingLeafBean(
            final Function beanExtractor,
            final AssertFactory assertFactory) {
        return isNotNull()
                .extracting(beanExtractor, assertFactory);
    }

    @Override
    public Assert extractingLeafBean() {
        return isNotNull()
                .extracting(ConstraintViolation::getLeafBean, new ObjectAssertFactory<>());
    }

    // ---------------------------------------------------------------------------------------------------- propertyPath
    @Override
    public >> ASSERT extractingPropertyPath(final AssertFactory assertFactory) {
        return isNotNull()
                .extracting(ConstraintViolation::getPropertyPath, assertFactory::createAssert);
    }

    // -------------------------------------------------------------------------------------------------------- rootBean
    @Override
    public > ASSERT extractingRootBean(
            final AssertFactory assertFactory) {
        return isNotNull()
                .extracting(ConstraintViolation::getRootBean, assertFactory);
    }

    // --------------------------------------------------------------------------------------------------- rootBeanClass
    @Override
    public > ASSERT extractingRootBeanClass(
            final AssertFactory, ? extends ASSERT> assertFactory) {
        Objects.requireNonNull(assertFactory, "assertFactory is null");
        return isNotNull()
                .extracting(ConstraintViolation::getRootBeanClass, assertFactory);
    }
}