io.openapiprocessor.jsonschema.converter.MapSetStringsOrEmptyConverter Maven / Gradle / Ivy

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/*
 * Copyright 2022 https://github.com/openapi-processor/openapi-parser
 * PDX-License-Identifier: Apache-2.0
 */

package io.openapiprocessor.jsonschema.converter;

import io.openapiprocessor.jsonschema.schema.JsonPointer;
import io.openapiprocessor.jsonschema.support.Types;
import org.checkerframework.checker.nullness.qual.Nullable;

import java.util.*;

import static java.util.Collections.unmodifiableMap;
import static java.util.Collections.unmodifiableSet;

/**
 * get a {@link Map} of {@link Set}<{@link String}> from the {@code name} property
 * {@code value}.
 */
public class MapSetStringsOrEmptyConverter implements PropertyConverter>> {

    private final ResponseType responseType;

    public MapSetStringsOrEmptyConverter () {
        responseType = ResponseType.EMPTY;
    }

    public MapSetStringsOrEmptyConverter (ResponseType responseType) {
        this.responseType = responseType;
    }

    @Override
    public @Nullable Map> convert (String name, @Nullable Object value, String location) {
        if (value == null)
            return responseType == ResponseType.EMPTY ? Collections.emptyMap () : null;

        Map values = Types.convertMap (location, value);

        Map> required = new LinkedHashMap<> ();
        values.forEach ((propName, propValue) -> {
            Collection propValues = asStrings (
                Types.convertCollection (getLocation (location, propName), propValue));

            required.put (propName, unmodifiableSet (new LinkedHashSet<> (propValues)));
        });

        return unmodifiableMap (required);
    }

    @SuppressWarnings ("unchecked")
    private Collection asStrings (Collection values) {
        return (Collection) values;
    }

    private String getLocation (String location, String property) {
        return JsonPointer.from (location).getJsonPointer (property);
    }
}