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Validation support for Micronaut

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/*
 * Copyright 2017-2020 original authors
 *
 * 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
 *
 * https://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.
 */
package io.micronaut.validation.validator.extractors;

import io.micronaut.context.BeanContext;
import io.micronaut.context.BeanRegistration;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.Introspected;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.core.type.Argument;
import io.micronaut.core.util.CollectionUtils;
import jakarta.inject.Inject;
import jakarta.inject.Singleton;
import jakarta.validation.valueextraction.ValueExtractor;
import jakarta.validation.valueextraction.ValueExtractorDeclarationException;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Stream;

/**
 * The default value extractors.
 *
 * @author graemerocher
 * @since 1.2
 */
@Internal
@Singleton
@Introspected
public final class DefaultValueExtractors implements ValueExtractorRegistry {

    private final Map, List>> internalValueExtractors = new HashMap<>();
    private final Map, List>> localValueExtractors = new HashMap<>();
    private final Map, List>> matchingValueExtractors = new ConcurrentHashMap<>();

    /**
     * Default constructor.
     */
    public DefaultValueExtractors() {
        this(null);
    }

    /**
     * Constructor used during DI.
     *
     * @param beanContext The bean context
     */
    @Inject
    protected DefaultValueExtractors(@Nullable BeanContext beanContext) {
        for (Map.Entry, ValueExtractor> entry : InternalValueExtractors.getValueExtractors()) {
            final Argument